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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 | |
d7fb0a6d | 3 | ; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
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 | ||
d185d268 NB |
26 | -help |
27 | Common | |
cf03fd63 | 28 | Display this information |
d185d268 | 29 | |
c662432e NC |
30 | -help= |
31 | Common Report Joined | |
32 | --help=<class> Display descriptions of a specific class of options. <class> is one or more of optimizers, target, warnings, undocumented, params | |
903caebf | 33 | |
d185d268 NB |
34 | -target-help |
35 | Common | |
c662432e NC |
36 | Alias for --help=target |
37 | ||
41fd0f9b | 38 | ;; The following four entries are to work around the gcc driver |
c662432e NC |
39 | ;; program's insatiable desire to turn options starting with a |
40 | ;; double dash (--) into options starting with a dash f (-f). | |
41 | fhelp | |
02e819ff | 42 | Common Var(help_flag) |
c662432e NC |
43 | |
44 | fhelp= | |
45 | Common Joined | |
46 | ||
47 | ftarget-help | |
48 | Common | |
49 | ||
41fd0f9b RAE |
50 | fversion |
51 | Common | |
52 | ||
c662432e NC |
53 | -param |
54 | Common Separate | |
55 | --param <param>=<value> Set parameter <param> to value. See below for a complete list of parameters | |
d185d268 NB |
56 | |
57 | -version | |
58 | Common | |
59 | ||
60 | G | |
7b086b11 | 61 | Common Joined Separate UInteger |
cf03fd63 | 62 | -G<number> Put global and static data smaller than <number> bytes into a special section (on some targets) |
d185d268 | 63 | |
903caebf | 64 | O |
ab442df7 | 65 | Common JoinedOrMissing Optimization |
cf03fd63 | 66 | -O<number> Set optimization level to <number> |
903caebf NB |
67 | |
68 | Os | |
ab442df7 | 69 | Common Optimization |
cf03fd63 | 70 | Optimize for space rather than speed |
903caebf NB |
71 | |
72 | W | |
62a67c94 | 73 | Common RejectNegative Var(extra_warnings) Warning |
28786366 | 74 | This switch is deprecated; use -Wextra instead |
903caebf | 75 | |
e01cc6dc | 76 | Waggregate-return |
c662432e | 77 | Common Var(warn_aggregate_return) Warning |
28786366 | 78 | Warn about returning structures, unions or arrays |
e01cc6dc | 79 | |
590b1f2d | 80 | Warray-bounds |
21af5cdf | 81 | Common Var(warn_array_bounds) Warning |
590b1f2d DM |
82 | Warn if an array is accessed out of bounds |
83 | ||
5c498b10 | 84 | Wattributes |
c662432e | 85 | Common Var(warn_attributes) Init(1) Warning |
5c498b10 DD |
86 | Warn about inappropriate attribute usage |
87 | ||
e01cc6dc | 88 | Wcast-align |
c662432e | 89 | Common Var(warn_cast_align) Warning |
28786366 | 90 | Warn about pointer casts which increase alignment |
e01cc6dc NB |
91 | |
92 | Wdeprecated-declarations | |
c662432e | 93 | Common Var(warn_deprecated_decl) Init(1) Warning |
28786366 | 94 | Warn about uses of __attribute__((deprecated)) declarations |
e01cc6dc NB |
95 | |
96 | Wdisabled-optimization | |
c662432e | 97 | Common Var(warn_disabled_optimization) Warning |
28786366 | 98 | Warn when an optimization pass is disabled |
e01cc6dc NB |
99 | |
100 | Werror | |
50431bc4 | 101 | Common Var(warnings_are_errors) |
28786366 | 102 | Treat all warnings as errors |
e01cc6dc | 103 | |
79cf5994 DD |
104 | Werror= |
105 | Common Joined | |
106 | Treat specified warning as error | |
107 | ||
903caebf | 108 | Wextra |
62a67c94 | 109 | Common Var(extra_warnings) Warning |
cf03fd63 | 110 | Print extra (possibly unwanted) warnings |
903caebf | 111 | |
c65a01af | 112 | Wfatal-errors |
50431bc4 | 113 | Common Var(flag_fatal_errors) |
c65a01af RG |
114 | Exit on the first error occurred |
115 | ||
a214518f SP |
116 | Wframe-larger-than= |
117 | Common RejectNegative Joined UInteger | |
f94e1d66 | 118 | -Wframe-larger-than=<number> Warn if a function's stack frame requires more than <number> bytes |
a214518f | 119 | |
e01cc6dc | 120 | Winline |
c662432e | 121 | Common Var(warn_inline) Warning |
28786366 | 122 | Warn when an inlined function cannot be inlined |
e01cc6dc NB |
123 | |
124 | Wlarger-than- | |
e7a84854 | 125 | Common RejectNegative Joined UInteger Warning Undocumented |
e8fc888d MLI |
126 | |
127 | Wlarger-than= | |
128 | Common RejectNegative Joined UInteger Warning | |
129 | -Wlarger-than=<number> Warn if an object is larger than <number> bytes | |
e01cc6dc | 130 | |
f9cc1a70 | 131 | Wunsafe-loop-optimizations |
c662432e | 132 | Common Var(warn_unsafe_loop_optimizations) Warning |
f9cc1a70 PB |
133 | Warn if the loop cannot be optimized due to nontrivial assumptions. |
134 | ||
e01cc6dc | 135 | Wmissing-noreturn |
c662432e | 136 | Common Var(warn_missing_noreturn) Warning |
28786366 | 137 | Warn about functions which might be candidates for __attribute__((noreturn)) |
e01cc6dc | 138 | |
7621f5d5 VR |
139 | Wmudflap |
140 | Common Var(warn_mudflap) Init(1) Warning | |
141 | Warn about constructs not instrumented by -fmudflap | |
142 | ||
71834ad3 | 143 | Woverflow |
c662432e | 144 | Common Var(warn_overflow) Init(1) Warning |
71834ad3 RS |
145 | Warn about overflow in arithmetic expressions |
146 | ||
e01cc6dc | 147 | Wpacked |
c662432e | 148 | Common Var(warn_packed) Warning |
28786366 | 149 | Warn when the packed attribute has no effect on struct layout |
e01cc6dc NB |
150 | |
151 | Wpadded | |
c662432e | 152 | Common Var(warn_padded) Warning |
28786366 | 153 | Warn when padding is required to align structure members |
e01cc6dc NB |
154 | |
155 | Wshadow | |
c662432e | 156 | Common Var(warn_shadow) Warning |
28786366 | 157 | Warn when one local variable shadows another |
e01cc6dc | 158 | |
7d69de61 | 159 | Wstack-protector |
c662432e | 160 | Common Var(warn_stack_protect) Warning |
7d69de61 RH |
161 | Warn when not issuing stack smashing protection for some reason |
162 | ||
e01cc6dc | 163 | Wstrict-aliasing |
c662432e | 164 | Common Warning |
28786366 | 165 | Warn about code which might break strict aliasing rules |
e01cc6dc | 166 | |
5399d643 | 167 | Wstrict-aliasing= |
027b740e | 168 | Common Joined UInteger Var(warn_strict_aliasing) Init(-1) Warning |
5399d643 JW |
169 | Warn about code which might break strict aliasing rules |
170 | ||
6ac01510 | 171 | Wstrict-overflow |
21af5cdf | 172 | Common Warning |
6ac01510 ILT |
173 | Warn about optimizations that assume that signed overflow is undefined |
174 | ||
175 | Wstrict-overflow= | |
027b740e | 176 | Common Joined UInteger Var(warn_strict_overflow) Init(-1) Warning |
6ac01510 ILT |
177 | Warn about optimizations that assume that signed overflow is undefined |
178 | ||
e01cc6dc | 179 | Wswitch |
c662432e | 180 | Common Var(warn_switch) Warning |
28786366 | 181 | Warn about enumerated switches, with no default, missing a case |
e01cc6dc NB |
182 | |
183 | Wswitch-default | |
c662432e | 184 | Common Var(warn_switch_default) Warning |
28786366 | 185 | Warn about enumerated switches missing a \"default:\" statement |
e01cc6dc NB |
186 | |
187 | Wswitch-enum | |
c662432e | 188 | Common Var(warn_switch_enum) Warning |
28786366 | 189 | Warn about all enumerated switches missing a specific case |
e01cc6dc NB |
190 | |
191 | Wsystem-headers | |
c662432e | 192 | Common Var(warn_system_headers) Warning |
f3fdaec4 | 193 | Do not suppress warnings from system headers |
e01cc6dc | 194 | |
faebccf9 DN |
195 | Wtype-limits |
196 | Common Var(warn_type_limits) Init(-1) Warning | |
197 | Warn if a comparison is always true or always false due to the limited range of the data type | |
198 | ||
e01cc6dc | 199 | Wuninitialized |
62a67c94 | 200 | Common Var(warn_uninitialized) Init(-1) Warning |
28786366 | 201 | Warn about uninitialized automatic variables |
e01cc6dc NB |
202 | |
203 | Wunreachable-code | |
bc3c12a2 EF |
204 | Common |
205 | Does nothing. Preserved for backward compatibility. | |
e01cc6dc | 206 | |
903caebf | 207 | Wunused |
e73f7547 | 208 | Common Var(warn_unused) Init(0) Warning |
cf03fd63 | 209 | Enable all -Wunused- warnings |
903caebf | 210 | |
e01cc6dc | 211 | Wunused-function |
e73f7547 | 212 | Common Var(warn_unused_function) Init(-1) Warning |
28786366 | 213 | Warn when a function is unused |
e01cc6dc NB |
214 | |
215 | Wunused-label | |
e73f7547 | 216 | Common Var(warn_unused_label) Init(-1) Warning |
28786366 | 217 | Warn when a label is unused |
e01cc6dc NB |
218 | |
219 | Wunused-parameter | |
e73f7547 | 220 | Common Var(warn_unused_parameter) Init(-1) Warning |
28786366 | 221 | Warn when a function parameter is unused |
e01cc6dc NB |
222 | |
223 | Wunused-value | |
e73f7547 | 224 | Common Var(warn_unused_value) Init(-1) Warning |
28786366 | 225 | Warn when an expression value is unused |
e01cc6dc NB |
226 | |
227 | Wunused-variable | |
e73f7547 | 228 | Common Var(warn_unused_variable) Init(-1) Warning |
28786366 | 229 | Warn when a variable is unused |
e01cc6dc | 230 | |
16c1c158 | 231 | Wcoverage-mismatch |
21af5cdf | 232 | Common RejectNegative Var(warn_coverage_mismatch) Warning |
16c1c158 RG |
233 | Warn instead of error in case profiles in -fprofile-use do not match |
234 | ||
d185d268 NB |
235 | aux-info |
236 | Common Separate | |
cf03fd63 | 237 | -aux-info <file> Emit declaration information into <file> |
d185d268 NB |
238 | |
239 | aux-info= | |
240 | Common Joined | |
241 | ||
242 | auxbase | |
243 | Common Separate | |
244 | ||
245 | auxbase-strip | |
246 | Common Separate | |
247 | ||
248 | d | |
249 | Common Joined | |
cf03fd63 | 250 | -d<letters> Enable dumps from specific passes of the compiler |
d185d268 NB |
251 | |
252 | dumpbase | |
253 | Common Separate | |
cf03fd63 | 254 | -dumpbase <file> Set the file basename to be used for dumps |
d185d268 | 255 | |
d7fb0a6d L |
256 | dumpdir |
257 | Common Separate | |
316fc112 | 258 | -dumpdir <dir> Set the directory name to be used for dumps |
d7fb0a6d | 259 | |
31b66477 KC |
260 | ; The version of the C++ ABI in use. The following values are allowed: |
261 | ; | |
262 | ; 0: The version of the ABI believed most conformant with the C++ ABI | |
263 | ; specification. This ABI may change as bugs are discovered and fixed. | |
264 | ; Therefore, 0 will not necessarily indicate the same ABI in different | |
265 | ; versions of G++. | |
266 | ; | |
267 | ; 1: The version of the ABI first used in G++ 3.2. | |
268 | ; | |
abfe01ce JM |
269 | ; 2: The version of the ABI first used in G++ 3.4 (and current default). |
270 | ; | |
271 | ; 3: The version of the ABI that fixes the missing underscore | |
272 | ; in template non-type arguments of pointer type. | |
273 | ; | |
274 | ; 4: The version of the ABI that introduces unambiguous mangling of | |
275 | ; vector types. | |
99a8d35b | 276 | ; |
31b66477 KC |
277 | ; Additional positive integers will be assigned as new versions of |
278 | ; the ABI become the default version of the ABI. | |
57782ad8 | 279 | fabi-version= |
50431bc4 | 280 | Common Joined UInteger Var(flag_abi_version) Init(2) |
57782ad8 | 281 | |
6ff3a151 | 282 | falign-functions |
ab442df7 | 283 | Common Report Var(align_functions,0) Optimization UInteger |
f3fdaec4 | 284 | Align the start of functions |
6ff3a151 | 285 | |
058de654 NB |
286 | falign-functions= |
287 | Common RejectNegative Joined UInteger | |
288 | ||
6ff3a151 | 289 | falign-jumps |
ab442df7 | 290 | Common Report Var(align_jumps,0) Optimization UInteger |
f3fdaec4 | 291 | Align labels which are only reached by jumping |
6ff3a151 | 292 | |
058de654 NB |
293 | falign-jumps= |
294 | Common RejectNegative Joined UInteger | |
295 | ||
6ff3a151 | 296 | falign-labels |
ab442df7 | 297 | Common Report Var(align_labels,0) Optimization UInteger |
f3fdaec4 | 298 | Align all labels |
6ff3a151 | 299 | |
058de654 NB |
300 | falign-labels= |
301 | Common RejectNegative Joined UInteger | |
302 | ||
6ff3a151 | 303 | falign-loops |
ab442df7 | 304 | Common Report Var(align_loops) Optimization UInteger |
f3fdaec4 | 305 | Align the start of loops |
6ff3a151 | 306 | |
058de654 NB |
307 | falign-loops= |
308 | Common RejectNegative Joined UInteger | |
309 | ||
6ff3a151 | 310 | fargument-alias |
0d3c82d6 RG |
311 | Common |
312 | Does nothing. Preserved for backward compatibility. | |
6ff3a151 NB |
313 | |
314 | fargument-noalias | |
0d3c82d6 RG |
315 | Common |
316 | Does nothing. Preserved for backward compatibility. | |
6ff3a151 NB |
317 | |
318 | fargument-noalias-global | |
0d3c82d6 RG |
319 | Common |
320 | Does nothing. Preserved for backward compatibility. | |
6ff3a151 | 321 | |
0698a1d2 | 322 | fargument-noalias-anything |
0d3c82d6 RG |
323 | Common |
324 | Does nothing. Preserved for backward compatibility. | |
0698a1d2 | 325 | |
6ff3a151 | 326 | fasynchronous-unwind-tables |
c662432e | 327 | Common Report Var(flag_asynchronous_unwind_tables) Optimization |
f3fdaec4 | 328 | Generate unwind tables that are exact at each instruction boundary |
6ff3a151 | 329 | |
6fb5fa3c DB |
330 | fauto-inc-dec |
331 | Common Report Var(flag_auto_inc_dec) Init(1) | |
332 | Generate auto-inc/dec instructions | |
333 | ||
31b66477 KC |
334 | ; -fcheck-bounds causes gcc to generate array bounds checks. |
335 | ; For C, C++ and ObjC: defaults off. | |
336 | ; For Java: defaults to on. | |
337 | ; For Fortran: defaults to off. | |
6ff3a151 | 338 | fbounds-check |
50431bc4 | 339 | Common Report Var(flag_bounds_check) |
f3fdaec4 | 340 | Generate code to check bounds before indexing arrays |
6ff3a151 NB |
341 | |
342 | fbranch-count-reg | |
c662432e | 343 | Common Report Var(flag_branch_on_count_reg) Init(1) Optimization |
f3fdaec4 | 344 | Replace add, compare, branch with branch on count register |
6ff3a151 NB |
345 | |
346 | fbranch-probabilities | |
c662432e | 347 | Common Report Var(flag_branch_probabilities) Optimization |
f3fdaec4 | 348 | Use profiling information for branch probabilities |
6ff3a151 | 349 | |
de32c0cb | 350 | fbranch-target-load-optimize |
c662432e | 351 | Common Report Var(flag_branch_target_load_optimize) Optimization |
f3fdaec4 | 352 | Perform branch target load optimization before prologue / epilogue threading |
de32c0cb NB |
353 | |
354 | fbranch-target-load-optimize2 | |
c662432e | 355 | Common Report Var(flag_branch_target_load_optimize2) Optimization |
f3fdaec4 | 356 | Perform branch target load optimization after prologue / epilogue threading |
de32c0cb | 357 | |
1194fc79 | 358 | fbtr-bb-exclusive |
c662432e | 359 | Common Report Var(flag_btr_bb_exclusive) Optimization |
1194fc79 R |
360 | Restrict target load migration not to re-use registers in any basic block |
361 | ||
058de654 NB |
362 | fcall-saved- |
363 | Common Joined RejectNegative | |
cf03fd63 | 364 | -fcall-saved-<register> Mark <register> as being preserved across functions |
058de654 NB |
365 | |
366 | fcall-used- | |
367 | Common Joined RejectNegative | |
cf03fd63 | 368 | -fcall-used-<register> Mark <register> as being corrupted by function calls |
058de654 | 369 | |
31b66477 KC |
370 | ; Nonzero for -fcaller-saves: allocate values in regs that need to |
371 | ; be saved across function calls, if that produces overall better code. | |
372 | ; Optional now, so people can test it. | |
de32c0cb | 373 | fcaller-saves |
c662432e | 374 | Common Report Var(flag_caller_saves) Optimization |
f3fdaec4 | 375 | Save registers around function calls |
de32c0cb | 376 | |
3d8864c0 SP |
377 | fcheck-data-deps |
378 | Common Report Var(flag_check_data_deps) | |
379 | Compare the results of several data dependence analyzers. | |
380 | ||
6ff3a151 | 381 | fcommon |
c662432e | 382 | Common Report Var(flag_no_common,0) Optimization |
f3fdaec4 | 383 | Do not put uninitialized globals in the common section |
6ff3a151 | 384 | |
2153915d AO |
385 | fcompare-debug= |
386 | Common JoinedOrMissing RejectNegative Var(flag_compare_debug_opt) | |
f94e1d66 | 387 | -fcompare-debug[=<opts>] Compile with and without e.g. -gtoggle, and compare the final-insns dump |
2153915d AO |
388 | |
389 | fcompare-debug-second | |
390 | Common RejectNegative Var(flag_compare_debug) | |
391 | Run only the second compilation of -fcompare-debug | |
392 | ||
b5b8b0ac AO |
393 | fconserve-stack |
394 | Common Var(flag_conserve_stack) Optimization | |
395 | Do not perform optimizations increasing noticeably stack usage | |
396 | ||
6ff3a151 | 397 | fcprop-registers |
c662432e | 398 | Common Report Var(flag_cprop_registers) Optimization |
f3fdaec4 | 399 | Perform a register copy-propagation optimization pass |
6ff3a151 | 400 | |
de32c0cb | 401 | fcrossjumping |
c662432e | 402 | Common Report Var(flag_crossjumping) Optimization |
f3fdaec4 | 403 | Perform cross-jumping optimization |
de32c0cb NB |
404 | |
405 | fcse-follow-jumps | |
c662432e | 406 | Common Report Var(flag_cse_follow_jumps) Optimization |
f3fdaec4 | 407 | When running CSE, follow jumps to their targets |
de32c0cb NB |
408 | |
409 | fcse-skip-blocks | |
5f39ad47 SB |
410 | Common |
411 | Does nothing. Preserved for backward compatibility. | |
de32c0cb | 412 | |
c7463669 | 413 | fcx-limited-range |
c662432e | 414 | Common Report Var(flag_cx_limited_range) Optimization |
c7463669 RH |
415 | Omit range reduction step when performing complex division |
416 | ||
35085f76 JB |
417 | fcx-fortran-rules |
418 | Common Report Var(flag_cx_fortran_rules) Optimization | |
419 | Complex multiplication and division follow Fortran rules | |
420 | ||
6ff3a151 | 421 | fdata-sections |
c662432e | 422 | Common Report Var(flag_data_sections) Optimization |
f3fdaec4 | 423 | Place data items into their own section |
6ff3a151 | 424 | |
0a090f42 SP |
425 | fdbg-cnt-list |
426 | Common Report | |
427 | List all available debugging counters with their limits and counts. | |
428 | ||
6fb5fa3c DB |
429 | fdbg-cnt= |
430 | Common RejectNegative Joined | |
f94e1d66 | 431 | -fdbg-cnt=<counter>:<limit>[,<counter>:<limit>,...] Set the debug counter limit. |
6fb5fa3c | 432 | |
c8aea42c PB |
433 | fdebug-prefix-map= |
434 | Common Joined RejectNegative | |
435 | Map one directory name to another in debug information | |
436 | ||
31b66477 KC |
437 | ; Nonzero for -fdefer-pop: don't pop args after each function call |
438 | ; instead save them up to pop many calls' args with one insns. | |
de32c0cb | 439 | fdefer-pop |
c662432e | 440 | Common Report Var(flag_defer_pop) Optimization |
f3fdaec4 | 441 | Defer popping functions args from stack until later |
de32c0cb NB |
442 | |
443 | fdelayed-branch | |
c662432e | 444 | Common Report Var(flag_delayed_branch) Optimization |
f3fdaec4 | 445 | Attempt to fill delay slots of branch instructions |
de32c0cb NB |
446 | |
447 | fdelete-null-pointer-checks | |
1ad2f450 | 448 | Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization |
f3fdaec4 | 449 | Delete useless null pointer checks |
de32c0cb NB |
450 | |
451 | fdiagnostics-show-location= | |
452 | Common Joined RejectNegative | |
cf03fd63 | 453 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics |
de32c0cb | 454 | |
ccf08a6e | 455 | fdiagnostics-show-option |
2098fe9e | 456 | Common |
c85ce869 | 457 | Amend appropriate diagnostic messages with the command line option that controls them |
ccf08a6e | 458 | |
6de9cd9a DN |
459 | fdump- |
460 | Common Joined RejectNegative | |
461 | -fdump-<type> Dump various compiler internals to a file | |
462 | ||
2153915d AO |
463 | fdump-final-insns= |
464 | Common RejectNegative Joined Var(flag_dump_final_insns) | |
465 | -fdump-final-insns=filename Dump to filename the insns at the end of translation | |
466 | ||
24a7799e R |
467 | fdump-noaddr |
468 | Common Report Var(flag_dump_noaddr) | |
469 | Suppress output of addresses in debugging dumps | |
470 | ||
6ff3a151 | 471 | fdump-unnumbered |
50431bc4 | 472 | Common Report Var(flag_dump_unnumbered) VarExists |
24a7799e | 473 | Suppress output of instruction numbers, line number notes and addresses in debugging dumps |
6ff3a151 | 474 | |
2aa7c49b AO |
475 | fdump-unnumbered-links |
476 | Common Report Var(flag_dump_unnumbered_links) VarExists | |
477 | Suppress output of previous and next insn numbers in debugging dumps | |
478 | ||
b5b8b0ac AO |
479 | fdwarf2-cfi-asm |
480 | Common Report Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE) | |
481 | Enable CFI tables via GAS assembler directives. | |
482 | ||
355866de | 483 | fearly-inlining |
c662432e | 484 | Common Report Var(flag_early_inlining) Init(1) Optimization |
355866de RG |
485 | Perform early inlining |
486 | ||
de32c0cb | 487 | feliminate-dwarf2-dups |
50431bc4 | 488 | Common Report Var(flag_eliminate_dwarf2_dups) |
f3fdaec4 | 489 | Perform DWARF2 duplicate elimination |
de32c0cb | 490 | |
07ffa034 MJ |
491 | fipa-sra |
492 | Common Report Var(flag_ipa_sra) Init(0) Optimization | |
493 | Perform interprocedural reduction of aggregates | |
494 | ||
6a08f7b3 | 495 | feliminate-unused-debug-symbols |
50431bc4 | 496 | Common Report Var(flag_debug_only_used_symbols) |
f3fdaec4 | 497 | Perform unused type elimination in debug info |
6a08f7b3 | 498 | |
de32c0cb | 499 | feliminate-unused-debug-types |
50431bc4 | 500 | Common Report Var(flag_eliminate_unused_debug_types) Init(1) |
f3fdaec4 | 501 | Perform unused type elimination in debug info |
de32c0cb | 502 | |
e713adf6 | 503 | femit-class-debug-always |
eae8e474 | 504 | Common Report Var(flag_emit_class_debug_always) Init(0) |
e713adf6 CD |
505 | Do not suppress C++ class debug information. |
506 | ||
77831620 CC |
507 | fenable-icf-debug |
508 | Common Report Var(flag_enable_icf_debug) | |
509 | Generate debug information to support Identical Code Folding (ICF) | |
510 | ||
6ff3a151 | 511 | fexceptions |
c662432e | 512 | Common Report Var(flag_exceptions) Optimization |
f3fdaec4 | 513 | Enable exception handling |
6ff3a151 | 514 | |
de32c0cb | 515 | fexpensive-optimizations |
c662432e | 516 | Common Report Var(flag_expensive_optimizations) Optimization |
f3fdaec4 | 517 | Perform a number of minor, expensive optimizations |
de32c0cb | 518 | |
8ce94e44 JM |
519 | fexcess-precision= |
520 | Common Joined RejectNegative | |
521 | -fexcess-precision=[fast|standard] Specify handling of excess floating-point precision | |
522 | ||
058de654 NB |
523 | ffast-math |
524 | Common | |
525 | ||
6ff3a151 | 526 | ffinite-math-only |
c662432e | 527 | Common Report Var(flag_finite_math_only) Optimization |
f3fdaec4 | 528 | Assume no NaNs or infinities are generated |
6ff3a151 | 529 | |
058de654 NB |
530 | ffixed- |
531 | Common Joined RejectNegative | |
cf03fd63 | 532 | -ffixed-<register> Mark <register> as being unavailable to the compiler |
058de654 | 533 | |
de32c0cb | 534 | ffloat-store |
c662432e | 535 | Common Report Var(flag_float_store) Optimization |
31b66477 | 536 | Don't allocate floats and doubles in extended-precision registers |
de32c0cb NB |
537 | |
538 | fforce-addr | |
3de5e93a SB |
539 | Common |
540 | Does nothing. Preserved for backward compatibility. | |
de32c0cb | 541 | |
2ca2b607 SB |
542 | fforward-propagate |
543 | Common Report Var(flag_forward_propagate) Optimization | |
a52b023a PB |
544 | Perform a forward propagation pass on RTL |
545 | ||
31b66477 KC |
546 | ; Nonzero means don't put addresses of constant functions in registers. |
547 | ; Used for compiling the Unix kernel, where strange substitutions are | |
548 | ; done on the assembly output. | |
de32c0cb | 549 | ffunction-cse |
50431bc4 | 550 | Common Report Var(flag_no_function_cse,0) |
f3fdaec4 | 551 | Allow function addresses to be held in registers |
de32c0cb | 552 | |
6ff3a151 | 553 | ffunction-sections |
50431bc4 | 554 | Common Report Var(flag_function_sections) |
f3fdaec4 | 555 | Place each function into its own section |
6ff3a151 | 556 | |
de32c0cb | 557 | fgcse |
c662432e | 558 | Common Report Var(flag_gcse) Optimization |
f3fdaec4 | 559 | Perform global common subexpression elimination |
de32c0cb NB |
560 | |
561 | fgcse-lm | |
c662432e | 562 | Common Report Var(flag_gcse_lm) Init(1) Optimization |
f3fdaec4 | 563 | Perform enhanced load motion during global common subexpression elimination |
de32c0cb NB |
564 | |
565 | fgcse-sm | |
c662432e | 566 | Common Report Var(flag_gcse_sm) Init(0) Optimization |
f3fdaec4 | 567 | Perform store motion after global common subexpression elimination |
de32c0cb | 568 | |
f5f2e3cd | 569 | fgcse-las |
c662432e | 570 | Common Report Var(flag_gcse_las) Init(0) Optimization |
f9957958 MH |
571 | Perform redundant load after store elimination in global common subexpression |
572 | elimination | |
573 | ||
574 | fgcse-after-reload | |
c662432e | 575 | Common Report Var(flag_gcse_after_reload) Optimization |
f9957958 | 576 | Perform global common subexpression elimination after register allocation |
c85ce869 | 577 | has finished |
f5f2e3cd | 578 | |
d0a58904 | 579 | ; This option is not documented yet as its semantics will change. |
f8bf9252 SP |
580 | fgraphite |
581 | Common Report Var(flag_graphite) | |
582 | Enable in and out of Graphite representation | |
583 | ||
204b560f SP |
584 | fgraphite-identity |
585 | Common Report Var(flag_graphite_identity) Optimization | |
586 | Enable Graphite Identity transformation | |
587 | ||
3cf0e270 SP |
588 | floop-parallelize-all |
589 | Common Report Var(flag_loop_parallelize_all) Optimization | |
204b560f SP |
590 | Mark all loops as parallel |
591 | ||
f8bf9252 SP |
592 | floop-strip-mine |
593 | Common Report Var(flag_loop_strip_mine) Optimization | |
594 | Enable Loop Strip Mining transformation | |
595 | ||
596 | floop-interchange | |
597 | Common Report Var(flag_loop_interchange) Optimization | |
598 | Enable Loop Interchange transformation | |
599 | ||
600 | floop-block | |
601 | Common Report Var(flag_loop_block) Optimization | |
602 | Enable Loop Blocking transformation | |
603 | ||
6ff3a151 | 604 | fguess-branch-probability |
c662432e | 605 | Common Report Var(flag_guess_branch_prob) Optimization |
f3fdaec4 | 606 | Enable guessing of branch probabilities |
6ff3a151 | 607 | |
31b66477 KC |
608 | ; Nonzero means ignore `#ident' directives. 0 means handle them. |
609 | ; Generate position-independent code for executables if possible | |
610 | ; On SVR4 targets, it also controls whether or not to emit a | |
611 | ; string identifying the compiler. | |
6ff3a151 | 612 | fident |
50431bc4 | 613 | Common Report Var(flag_no_ident,0) |
f3fdaec4 | 614 | Process #ident directives |
6ff3a151 | 615 | |
de32c0cb | 616 | fif-conversion |
c662432e | 617 | Common Report Var(flag_if_conversion) Optimization |
f3fdaec4 | 618 | Perform conversion of conditional jumps to branchless equivalents |
de32c0cb NB |
619 | |
620 | fif-conversion2 | |
c662432e | 621 | Common Report Var(flag_if_conversion2) Optimization |
f3fdaec4 | 622 | Perform conversion of conditional jumps to conditional execution |
de32c0cb | 623 | |
31b66477 KC |
624 | ; -finhibit-size-directive inhibits output of .size for ELF. |
625 | ; This is used only for compiling crtstuff.c, | |
626 | ; and it may be extended to other effects | |
627 | ; needed for crtstuff.c on other systems. | |
6ff3a151 | 628 | finhibit-size-directive |
50431bc4 | 629 | Common Report Var(flag_inhibit_size_directive) |
f3fdaec4 | 630 | Do not generate .size directives |
6ff3a151 | 631 | |
3e293154 MJ |
632 | findirect-inlining |
633 | Common Report Var(flag_indirect_inlining) | |
634 | Perform indirect inlining | |
635 | ||
31b66477 KC |
636 | ; Nonzero means that functions declared `inline' will be treated |
637 | ; as `static'. Prevents generation of zillions of copies of unused | |
638 | ; static inline functions; instead, `inlines' are written out | |
639 | ; only when actually used. Used in conjunction with -g. Also | |
640 | ; does the right thing with #pragma interface. | |
de32c0cb | 641 | finline |
e90acd93 | 642 | Common Report Var(flag_no_inline,0) Init(0) |
f3fdaec4 | 643 | Pay attention to the \"inline\" keyword |
de32c0cb | 644 | |
4d4b8cb9 JH |
645 | finline-small-functions |
646 | Common Report Var(flag_inline_small_functions) Optimization | |
647 | Integrate simple functions into their callers when code size is known to not growth | |
648 | ||
de32c0cb | 649 | finline-functions |
c662432e | 650 | Common Report Var(flag_inline_functions) Optimization |
f3fdaec4 | 651 | Integrate simple functions into their callers |
de32c0cb | 652 | |
355866de | 653 | finline-functions-called-once |
c662432e | 654 | Common Report Var(flag_inline_functions_called_once) Init(1) Optimization |
355866de | 655 | Integrate functions called once into their callers |
d63db217 | 656 | |
d302c9d6 NB |
657 | finline-limit- |
658 | Common RejectNegative Joined UInteger | |
659 | ||
660 | finline-limit= | |
661 | Common RejectNegative Joined UInteger | |
cf03fd63 | 662 | -finline-limit=<number> Limit the size of inlined functions to <number> |
d302c9d6 | 663 | |
6ff3a151 | 664 | finstrument-functions |
50431bc4 | 665 | Common Report Var(flag_instrument_function_entry_exit) |
f3fdaec4 | 666 | Instrument function entry and exit with profiling calls |
6ff3a151 | 667 | |
8d5a7d1f ILT |
668 | finstrument-functions-exclude-function-list= |
669 | Common RejectNegative Joined | |
670 | -finstrument-functions-exclude-function-list=name,... Do not instrument listed functions | |
671 | ||
672 | finstrument-functions-exclude-file-list= | |
673 | Common RejectNegative Joined | |
674 | -finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files | |
675 | ||
d6e14e8f | 676 | fipa-cp |
c662432e | 677 | Common Report Var(flag_ipa_cp) Optimization |
d6e14e8f SB |
678 | Perform Interprocedural constant propagation |
679 | ||
5e45130d JH |
680 | fipa-cp-clone |
681 | Common Report Var(flag_ipa_cp_clone) Optimization | |
682 | Perform cloning to make Interprocedural constant propagation stronger | |
683 | ||
ea900239 | 684 | fipa-pure-const |
c662432e | 685 | Common Report Var(flag_ipa_pure_const) Init(0) Optimization |
ea900239 DB |
686 | Discover pure and const functions |
687 | ||
4cf4d6a3 | 688 | fipa-pta |
c662432e | 689 | Common Report Var(flag_ipa_pta) Init(0) Optimization |
4cf4d6a3 DB |
690 | Perform interprocedural points-to analysis |
691 | ||
ea900239 | 692 | fipa-reference |
c662432e | 693 | Common Report Var(flag_ipa_reference) Init(0) Optimization |
ea900239 DB |
694 | Discover readonly and non addressable static variables |
695 | ||
696 | fipa-type-escape | |
c662432e | 697 | Common Report Var(flag_ipa_type_escape) Init(0) Optimization |
ea900239 DB |
698 | Type based escape and alias analysis |
699 | ||
43d861a5 | 700 | fipa-matrix-reorg |
6ae4be32 | 701 | Common Report Var(flag_ipa_matrix_reorg) Optimization |
43d861a5 RL |
702 | Perform matrix layout flattening and transposing based |
703 | on profiling information. | |
704 | ||
e1dc98b2 OG |
705 | fipa-struct-reorg |
706 | Common Report Var(flag_ipa_struct_reorg) | |
707 | Perform structure layout optimizations based | |
708 | on profiling information. | |
709 | ||
058e97ec VM |
710 | fira-algorithm= |
711 | Common Joined RejectNegative | |
7db7ed3c VM |
712 | -fira-algorithm=[CB|priority] Set the used IRA algorithm |
713 | ||
714 | fira-region= | |
715 | Common Joined RejectNegative | |
716 | -fira-region=[one|all|mixed] Set regions for IRA | |
058e97ec VM |
717 | |
718 | fira-coalesce | |
719 | Common Report Var(flag_ira_coalesce) Init(0) | |
720 | Do optimistic coalescing. | |
721 | ||
1833192f VM |
722 | fira-loop-pressure |
723 | Common Report Var(flag_ira_loop_pressure) | |
724 | Use IRA based register pressure calculation | |
725 | in RTL loop optimizations. | |
726 | ||
058e97ec VM |
727 | fira-share-save-slots |
728 | Common Report Var(flag_ira_share_save_slots) Init(1) | |
729 | Share slots for saving different hard registers. | |
730 | ||
731 | fira-share-spill-slots | |
732 | Common Report Var(flag_ira_share_spill_slots) Init(1) | |
733 | Share stack slots for spilled pseudo-registers. | |
734 | ||
735 | fira-verbose= | |
736 | Common RejectNegative Joined UInteger | |
f94e1d66 | 737 | -fira-verbose=<number> Control IRA's level of diagnostic messages. |
058e97ec | 738 | |
8b11a64c | 739 | fivopts |
c662432e | 740 | Common Report Var(flag_ivopts) Init(1) Optimization |
8b11a64c ZD |
741 | Optimize induction variables on trees |
742 | ||
82c0180d | 743 | fjump-tables |
c662432e | 744 | Common Var(flag_jump_tables) Init(1) Optimization |
82c0180d JM |
745 | Use jump tables for sufficiently large switch statements |
746 | ||
de32c0cb | 747 | fkeep-inline-functions |
50431bc4 | 748 | Common Report Var(flag_keep_inline_functions) |
f3fdaec4 | 749 | Generate code for functions even if they are fully inlined |
de32c0cb NB |
750 | |
751 | fkeep-static-consts | |
50431bc4 | 752 | Common Report Var(flag_keep_static_consts) Init(1) |
f3fdaec4 | 753 | Emit static const variables even if they are not used |
de32c0cb | 754 | |
6ff3a151 | 755 | fleading-underscore |
50431bc4 | 756 | Common Report Var(flag_leading_underscore) Init(-1) |
f3fdaec4 | 757 | Give external symbols a leading underscore |
6ff3a151 | 758 | |
efa1cdf0 ZD |
759 | floop-optimize |
760 | Common | |
c0220ea4 | 761 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 762 | |
d7f09764 DN |
763 | flto |
764 | Common Var(flag_lto) | |
765 | Enable link-time optimization. | |
766 | ||
767 | ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h. | |
768 | flto-compression-level= | |
769 | Common Joined UInteger Var(flag_lto_compression_level) Init(-1) | |
f94e1d66 | 770 | -flto-compression-level=<number> Use zlib compression level <number> for IL |
d7f09764 DN |
771 | |
772 | flto-report | |
773 | Common Report Var(flag_lto_report) Init(0) Optimization | |
774 | Report various link-time optimization statistics | |
775 | ||
6ff3a151 | 776 | fmath-errno |
ab442df7 | 777 | Common Report Var(flag_errno_math) Init(1) Optimization |
f3fdaec4 | 778 | Set errno after built-in math functions |
6ff3a151 NB |
779 | |
780 | fmem-report | |
50431bc4 | 781 | Common Report Var(mem_report) |
f3fdaec4 | 782 | Report on permanent memory allocation |
6ff3a151 | 783 | |
31b66477 KC |
784 | ; This will attempt to merge constant section constants, if 1 only |
785 | ; string constants and constants from constant pool, if 2 also constant | |
786 | ; variables. | |
6ff3a151 | 787 | fmerge-all-constants |
c662432e | 788 | Common Report Var(flag_merge_constants,2) Init(1) Optimization |
f3fdaec4 | 789 | Attempt to merge identical constants and constant variables |
6ff3a151 NB |
790 | |
791 | fmerge-constants | |
c662432e | 792 | Common Report Var(flag_merge_constants,1) VarExists Optimization |
f3fdaec4 | 793 | Attempt to merge identical constants across compilation units |
6ff3a151 | 794 | |
28a08168 ILT |
795 | fmerge-debug-strings |
796 | Common Report Var(flag_merge_debug_strings) Init(1) | |
797 | Attempt to merge identical debug strings across compilation units | |
798 | ||
de32c0cb NB |
799 | fmessage-length= |
800 | Common RejectNegative Joined UInteger | |
cf03fd63 | 801 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping |
de32c0cb | 802 | |
e5626198 | 803 | fmodulo-sched |
c662432e | 804 | Common Report Var(flag_modulo_sched) Optimization |
e5626198 AZ |
805 | Perform SMS based modulo scheduling before the first scheduling pass |
806 | ||
517d76fa VY |
807 | fmodulo-sched-allow-regmoves |
808 | Common Report Var(flag_modulo_sched_allow_regmoves) | |
809 | Perform SMS based modulo scheduling with register moves allowed | |
810 | ||
5e962776 | 811 | fmove-loop-invariants |
c662432e | 812 | Common Report Var(flag_move_loop_invariants) Init(1) Optimization |
5e962776 ZD |
813 | Move loop invariant computations out of loops |
814 | ||
6de9cd9a | 815 | fmudflap |
50431bc4 | 816 | Common RejectNegative Report Var(flag_mudflap) |
c85ce869 | 817 | Add mudflap bounds-checking instrumentation for single-threaded program |
6de9cd9a DN |
818 | |
819 | fmudflapth | |
110c4563 | 820 | Common RejectNegative Report VarExists Var(flag_mudflap,2) |
c85ce869 | 821 | Add mudflap bounds-checking instrumentation for multi-threaded program |
6de9cd9a DN |
822 | |
823 | fmudflapir | |
50431bc4 | 824 | Common RejectNegative Report Var(flag_mudflap_ignore_reads) |
c85ce869 | 825 | Ignore read operations when inserting mudflap instrumentation |
6de9cd9a | 826 | |
6fb5fa3c | 827 | fdce |
6ae4be32 | 828 | Common Var(flag_dce) Init(1) Optimization |
6fb5fa3c DB |
829 | Use the RTL dead code elimination pass |
830 | ||
831 | fdse | |
6ae4be32 | 832 | Common Var(flag_dse) Init(1) Optimization |
6fb5fa3c DB |
833 | Use the RTL dead store elimination pass |
834 | ||
d72372e4 | 835 | freschedule-modulo-scheduled-loops |
c662432e | 836 | Common Report Var(flag_resched_modulo_sched) Optimization |
d72372e4 MH |
837 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling |
838 | ||
6ff3a151 | 839 | fnon-call-exceptions |
c662432e | 840 | Common Report Var(flag_non_call_exceptions) Optimization |
f3fdaec4 | 841 | Support synchronous non-call exceptions |
6ff3a151 | 842 | |
de32c0cb | 843 | fomit-frame-pointer |
c662432e | 844 | Common Report Var(flag_omit_frame_pointer) Optimization |
f3fdaec4 | 845 | When possible do not generate stack frames |
de32c0cb | 846 | |
6ff3a151 | 847 | foptimize-register-move |
c662432e | 848 | Common Report Var(flag_regmove) Optimization |
f3fdaec4 | 849 | Do the full register move optimization pass |
6ff3a151 | 850 | |
de32c0cb | 851 | foptimize-sibling-calls |
c662432e | 852 | Common Report Var(flag_optimize_sibling_calls) Optimization |
f3fdaec4 | 853 | Optimize sibling and tail recursive calls |
de32c0cb | 854 | |
a5573239 JH |
855 | fpre-ipa-mem-report |
856 | Common Report Var(pre_ipa_mem_report) | |
857 | Report on memory allocation before interprocedural optimization | |
858 | ||
859 | fpost-ipa-mem-report | |
860 | Common Report Var(post_ipa_mem_report) | |
861 | Report on memory allocation before interprocedural optimization | |
862 | ||
6ff3a151 | 863 | fpack-struct |
c662432e | 864 | Common Report Var(flag_pack_struct) Optimization |
f3fdaec4 | 865 | Pack structure members together without holes |
6ff3a151 | 866 | |
467cecf3 | 867 | fpack-struct= |
c662432e | 868 | Common RejectNegative Joined UInteger Optimization |
467cecf3 JB |
869 | -fpack-struct=<number> Set initial maximum structure member alignment |
870 | ||
de32c0cb | 871 | fpcc-struct-return |
50431bc4 | 872 | Common Report Var(flag_pcc_struct_return,1) VarExists |
f3fdaec4 | 873 | Return small aggregates in memory, not registers |
de32c0cb NB |
874 | |
875 | fpeel-loops | |
c662432e | 876 | Common Report Var(flag_peel_loops) Optimization |
f3fdaec4 | 877 | Perform loop peeling |
de32c0cb NB |
878 | |
879 | fpeephole | |
c662432e | 880 | Common Report Var(flag_no_peephole,0) Optimization |
f3fdaec4 | 881 | Enable machine specific peephole optimizations |
de32c0cb | 882 | |
6ff3a151 | 883 | fpeephole2 |
c662432e | 884 | Common Report Var(flag_peephole2) Optimization |
f3fdaec4 | 885 | Enable an RTL peephole pass before sched2 |
6ff3a151 | 886 | |
31b66477 KC |
887 | fPIC |
888 | Common Report Var(flag_pic,2) | |
889 | Generate position-independent code if possible (large mode) | |
890 | ||
891 | fPIE | |
892 | Common Report Var(flag_pie,2) | |
893 | Generate position-independent code for executables if possible (large mode) | |
894 | ||
6ff3a151 | 895 | fpic |
50431bc4 | 896 | Common Report Var(flag_pic,1) VarExists |
31b66477 | 897 | Generate position-independent code if possible (small mode) |
6ff3a151 NB |
898 | |
899 | fpie | |
50431bc4 | 900 | Common Report Var(flag_pie,1) VarExists |
31b66477 | 901 | Generate position-independent code for executables if possible (small mode) |
6ff3a151 | 902 | |
68a607d8 DN |
903 | fplugin= |
904 | Common Joined RejectNegative | |
905 | Specify a plugin to load | |
906 | ||
907 | fplugin-arg- | |
908 | Common Joined RejectNegative | |
f94e1d66 | 909 | -fplugin-arg-<name>-<key>[=<value>] Specify argument <key>=<value> for plugin <name> |
68a607d8 | 910 | |
bbc8a8dc | 911 | fpredictive-commoning |
6ae4be32 | 912 | Common Report Var(flag_predictive_commoning) Optimization |
bbc8a8dc ZD |
913 | Run predictive commoning optimization. |
914 | ||
de32c0cb | 915 | fprefetch-loop-arrays |
c662432e | 916 | Common Report Var(flag_prefetch_loop_arrays) Optimization |
f3fdaec4 | 917 | Generate prefetch instructions, if available, for arrays in loops |
de32c0cb | 918 | |
6ff3a151 | 919 | fprofile |
50431bc4 | 920 | Common Report Var(profile_flag) |
f3fdaec4 | 921 | Enable basic program profiling code |
6ff3a151 NB |
922 | |
923 | fprofile-arcs | |
50431bc4 | 924 | Common Report Var(profile_arc_flag) |
f3fdaec4 | 925 | Insert arc-based program profiling code |
6ff3a151 | 926 | |
2f908293 SP |
927 | fprofile-dir= |
928 | Common Joined RejectNegative | |
929 | Set the top-level directory for storing the profile data. | |
930 | The default is 'pwd'. | |
931 | ||
52c76998 PY |
932 | fprofile-correction |
933 | Common Report Var(flag_profile_correction) | |
934 | Enable correction of flow inconsistent profile data input | |
935 | ||
a8a5f53a JH |
936 | fprofile-generate |
937 | Common | |
938 | Enable common options for generating profile info for profile feedback directed optimizations | |
939 | ||
2f908293 SP |
940 | fprofile-generate= |
941 | Common Joined RejectNegative | |
942 | Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir= | |
943 | ||
a8a5f53a | 944 | fprofile-use |
2f908293 | 945 | Common Var(flag_profile_use) |
a8a5f53a JH |
946 | Enable common options for performing profile feedback directed optimizations |
947 | ||
2f908293 SP |
948 | fprofile-use= |
949 | Common Joined RejectNegative | |
950 | Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir= | |
951 | ||
fca9dc00 | 952 | fprofile-values |
50431bc4 | 953 | Common Report Var(flag_profile_values) |
fca9dc00 ZD |
954 | Insert code to profile values of expressions |
955 | ||
de32c0cb NB |
956 | frandom-seed |
957 | Common | |
958 | ||
959 | frandom-seed= | |
960 | Common Joined RejectNegative | |
cf03fd63 | 961 | -frandom-seed=<string> Make compile reproducible using <string> |
de32c0cb | 962 | |
e0d9d0dd NC |
963 | ; This switch causes the command line that was used to create an |
964 | ; object file to be recorded into the object file. The exact format | |
965 | ; of this recording is target and binary file format dependent. | |
966 | ; It is related to the -fverbose-asm switch, but that switch only | |
967 | ; records information in the assembler output file as comments, so | |
968 | ; they never reach the object file. | |
969 | frecord-gcc-switches | |
970 | Common Report Var(flag_record_gcc_switches) | |
971 | Record gcc command line switches in the object file. | |
972 | ||
de32c0cb | 973 | freg-struct-return |
c662432e | 974 | Common Report Var(flag_pcc_struct_return,0) VarExists Optimization |
f3fdaec4 | 975 | Return small aggregates in registers |
de32c0cb | 976 | |
6ff3a151 | 977 | fregmove |
c662432e | 978 | Common Report Var(flag_regmove) Optimization |
f3fdaec4 | 979 | Enables a register move optimization |
6ff3a151 NB |
980 | |
981 | frename-registers | |
c662432e | 982 | Common Report Var(flag_rename_registers) Init(2) Optimization |
f3fdaec4 | 983 | Perform a register renaming optimization pass |
6ff3a151 NB |
984 | |
985 | freorder-blocks | |
c662432e | 986 | Common Report Var(flag_reorder_blocks) Optimization |
f3fdaec4 | 987 | Reorder basic blocks to improve code placement |
6ff3a151 | 988 | |
750054a2 | 989 | freorder-blocks-and-partition |
c662432e | 990 | Common Report Var(flag_reorder_blocks_and_partition) Optimization |
750054a2 CT |
991 | Reorder basic blocks and partition into hot and cold sections |
992 | ||
6ff3a151 | 993 | freorder-functions |
c662432e | 994 | Common Report Var(flag_reorder_functions) Optimization |
f3fdaec4 | 995 | Reorder functions to improve code placement |
6ff3a151 | 996 | |
de32c0cb | 997 | frerun-cse-after-loop |
c662432e | 998 | Common Report Var(flag_rerun_cse_after_loop) Init(2) Optimization |
f3fdaec4 | 999 | Add a common subexpression elimination pass after loop optimizations |
de32c0cb | 1000 | |
efa1cdf0 ZD |
1001 | frerun-loop-opt |
1002 | Common | |
c0220ea4 | 1003 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 1004 | |
039c3d42 | 1005 | frounding-math |
c662432e | 1006 | Common Report Var(flag_rounding_math) Optimization |
039c3d42 RS |
1007 | Disable optimizations that assume default FP rounding behavior |
1008 | ||
6ff3a151 | 1009 | fsched-interblock |
c662432e | 1010 | Common Report Var(flag_schedule_interblock) Init(1) Optimization |
f3fdaec4 | 1011 | Enable scheduling across basic blocks |
6ff3a151 | 1012 | |
ce18efcb VM |
1013 | fsched-pressure |
1014 | Common Report Var(flag_sched_pressure) Init(0) Optimization | |
1015 | Enable register pressure sensitive insn scheduling | |
1016 | ||
6ff3a151 | 1017 | fsched-spec |
c662432e | 1018 | Common Report Var(flag_schedule_speculative) Init(1) Optimization |
f3fdaec4 | 1019 | Allow speculative motion of non-loads |
6ff3a151 NB |
1020 | |
1021 | fsched-spec-load | |
c662432e | 1022 | Common Report Var(flag_schedule_speculative_load) Optimization |
f3fdaec4 | 1023 | Allow speculative motion of some loads |
6ff3a151 NB |
1024 | |
1025 | fsched-spec-load-dangerous | |
c662432e | 1026 | Common Report Var(flag_schedule_speculative_load_dangerous) Optimization |
f3fdaec4 | 1027 | Allow speculative motion of more loads |
6ff3a151 | 1028 | |
de32c0cb NB |
1029 | fsched-verbose= |
1030 | Common RejectNegative Joined | |
cf03fd63 | 1031 | -fsched-verbose=<number> Set the verbosity level of the scheduler |
de32c0cb | 1032 | |
6ff3a151 | 1033 | fsched2-use-superblocks |
c662432e | 1034 | Common Report Var(flag_sched2_use_superblocks) Optimization |
f3fdaec4 | 1035 | If scheduling post reload, do superblock scheduling |
6ff3a151 NB |
1036 | |
1037 | fsched2-use-traces | |
57257f0d AM |
1038 | Common |
1039 | Does nothing. Preserved for backward compatibility. | |
6ff3a151 | 1040 | |
de32c0cb | 1041 | fschedule-insns |
c662432e | 1042 | Common Report Var(flag_schedule_insns) Optimization |
f3fdaec4 | 1043 | Reschedule instructions before register allocation |
de32c0cb NB |
1044 | |
1045 | fschedule-insns2 | |
c662432e | 1046 | Common Report Var(flag_schedule_insns_after_reload) Optimization |
f3fdaec4 | 1047 | Reschedule instructions after register allocation |
de32c0cb | 1048 | |
e855c69d AB |
1049 | ; This flag should be on when a target implements non-trivial |
1050 | ; scheduling hooks, maybe saving some information for its own sake. | |
1051 | ; On IA64, for example, this is used for correct bundling. | |
1052 | fselective-scheduling | |
1053 | Common Report Var(flag_selective_scheduling) Optimization | |
1054 | Schedule instructions using selective scheduling algorithm | |
1055 | ||
1056 | fselective-scheduling2 | |
1057 | Common Report Var(flag_selective_scheduling2) Optimization | |
1058 | Run selective scheduling after reload | |
1059 | ||
1060 | fsel-sched-pipelining | |
1061 | Common Report Var(flag_sel_sched_pipelining) Init(0) Optimization | |
1062 | Perform software pipelining of inner loops during selective scheduling | |
1063 | ||
1064 | fsel-sched-pipelining-outer-loops | |
1065 | Common Report Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization | |
1066 | Perform software pipelining of outer loops during selective scheduling | |
1067 | ||
1068 | fsel-sched-reschedule-pipelined | |
1069 | Common Report Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization | |
1070 | Reschedule pipelined regions without pipelining | |
1071 | ||
31b66477 KC |
1072 | ; sched_stalled_insns means that insns can be moved prematurely from the queue |
1073 | ; of stalled insns into the ready list. | |
569fa502 | 1074 | fsched-stalled-insns |
ab442df7 | 1075 | Common Report Var(flag_sched_stalled_insns) Optimization UInteger |
569fa502 DN |
1076 | Allow premature scheduling of queued insns |
1077 | ||
1078 | fsched-stalled-insns= | |
c22cacf3 | 1079 | Common RejectNegative Joined UInteger |
4e994432 | 1080 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled |
569fa502 | 1081 | |
31b66477 KC |
1082 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will |
1083 | ; be examined for a dependency on a stalled insn that is candidate for | |
1084 | ; premature removal from the queue of stalled insns into the ready list (has | |
1085 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
569fa502 | 1086 | fsched-stalled-insns-dep |
ab442df7 | 1087 | Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger |
569fa502 DN |
1088 | Set dependence distance checking in premature scheduling of queued insns |
1089 | ||
1090 | fsched-stalled-insns-dep= | |
1091 | Common RejectNegative Joined UInteger | |
4e994432 | 1092 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns |
569fa502 | 1093 | |
ee4764a8 GS |
1094 | fsched-group-heuristic |
1095 | Common Report Var(flag_sched_group_heuristic) Init(1) Optimization | |
1096 | Enable the group heuristic in the scheduler | |
1097 | ||
1098 | fsched-critical-path-heuristic | |
1099 | Common Report Var(flag_sched_critical_path_heuristic) Init(1) Optimization | |
1100 | Enable the critical path heuristic in the scheduler | |
1101 | ||
1102 | fsched-spec-insn-heuristic | |
1103 | Common Report Var(flag_sched_spec_insn_heuristic) Init(1) Optimization | |
1104 | Enable the speculative instruction heuristic in the scheduler | |
1105 | ||
ee4764a8 GS |
1106 | fsched-rank-heuristic |
1107 | Common Report Var(flag_sched_rank_heuristic) Init(1) Optimization | |
1108 | Enable the rank heuristic in the scheduler | |
1109 | ||
1110 | fsched-last-insn-heuristic | |
1111 | Common Report Var(flag_sched_last_insn_heuristic) Init(1) Optimization | |
1112 | Enable the last instruction heuristic in the scheduler | |
1113 | ||
1114 | fsched-dep-count-heuristic | |
1115 | Common Report Var(flag_sched_dep_count_heuristic) Init(1) Optimization | |
1116 | Enable the dependent count heuristic in the scheduler | |
1117 | ||
aacd3885 | 1118 | fsection-anchors |
c662432e | 1119 | Common Report Var(flag_section_anchors) Optimization |
aacd3885 RS |
1120 | Access data in the same section from shared anchor points |
1121 | ||
8cd37d0b | 1122 | fsee |
8393a9c8 SD |
1123 | Common |
1124 | Does nothing. Preserved for backward compatibility. | |
8cd37d0b | 1125 | |
8abb6b22 | 1126 | fshow-column |
e74fe492 AH |
1127 | Common C ObjC C++ ObjC++ Report Var(flag_show_column) Init(1) |
1128 | Show column numbers in diagnostics, when available. Default on | |
8abb6b22 | 1129 | |
6ff3a151 | 1130 | fsignaling-nans |
c662432e | 1131 | Common Report Var(flag_signaling_nans) Optimization |
f3fdaec4 | 1132 | Disable optimizations observable by IEEE signaling NaNs |
6ff3a151 | 1133 | |
db02da79 | 1134 | fsigned-zeros |
21af5cdf | 1135 | Common Report Var(flag_signed_zeros) Init(1) Optimization |
db02da79 RS |
1136 | Disable floating point optimizations that ignore the IEEE signedness of zero |
1137 | ||
6ff3a151 | 1138 | fsingle-precision-constant |
c662432e | 1139 | Common Report Var(flag_single_precision_constant) Optimization |
f3fdaec4 | 1140 | Convert floating point constants to single precision constants |
6ff3a151 | 1141 | |
113d659a | 1142 | fsplit-ivs-in-unroller |
c662432e | 1143 | Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization |
c85ce869 | 1144 | Split lifetimes of induction variables when loops are unrolled |
113d659a | 1145 | |
e53a16e7 | 1146 | fsplit-wide-types |
21af5cdf | 1147 | Common Report Var(flag_split_wide_types) Optimization |
e53a16e7 ILT |
1148 | Split wide types into independent registers |
1149 | ||
f37a4f14 | 1150 | fvariable-expansion-in-unroller |
c662432e | 1151 | Common Report Var(flag_variable_expansion_in_unroller) Optimization |
c85ce869 | 1152 | Apply variable expansion when loops are unrolled |
f37a4f14 | 1153 | |
b38f3813 EB |
1154 | fstack-check= |
1155 | Common Report RejectNegative Joined | |
1156 | -fstack-check=[no|generic|specific] Insert stack checking code into the program | |
1157 | ||
6ff3a151 | 1158 | fstack-check |
b38f3813 EB |
1159 | Common Report |
1160 | Insert stack checking code into the program. Same as -fstack-check=specific | |
6ff3a151 | 1161 | |
de32c0cb NB |
1162 | fstack-limit |
1163 | Common | |
1164 | ||
058de654 NB |
1165 | fstack-limit-register= |
1166 | Common RejectNegative Joined | |
cf03fd63 | 1167 | -fstack-limit-register=<register> Trap if the stack goes past <register> |
058de654 NB |
1168 | |
1169 | fstack-limit-symbol= | |
1170 | Common RejectNegative Joined | |
cf03fd63 | 1171 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name> |
058de654 | 1172 | |
7d69de61 RH |
1173 | fstack-protector |
1174 | Common Report Var(flag_stack_protect, 1) | |
1175 | Use propolice as a stack protection method | |
1176 | ||
1177 | fstack-protector-all | |
1178 | Common Report RejectNegative Var(flag_stack_protect, 2) VarExists | |
1179 | Use a stack protection method for every function | |
1180 | ||
de32c0cb | 1181 | fstrength-reduce |
efa1cdf0 | 1182 | Common |
c0220ea4 | 1183 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1184 | |
31b66477 KC |
1185 | ; Nonzero if we should do (language-dependent) alias analysis. |
1186 | ; Typically, this analysis will assume that expressions of certain | |
1187 | ; types do not alias expressions of certain other types. Only used | |
1188 | ; if alias analysis (in general) is enabled. | |
6ff3a151 | 1189 | fstrict-aliasing |
c662432e | 1190 | Common Report Var(flag_strict_aliasing) Optimization |
f3fdaec4 | 1191 | Assume strict aliasing rules apply |
6ff3a151 | 1192 | |
eeef0e45 ILT |
1193 | fstrict-overflow |
1194 | Common Report Var(flag_strict_overflow) | |
1195 | Treat signed overflow as undefined | |
1196 | ||
de32c0cb | 1197 | fsyntax-only |
50431bc4 | 1198 | Common Report Var(flag_syntax_only) |
f3fdaec4 | 1199 | Check for syntax errors, then stop |
de32c0cb | 1200 | |
6ff3a151 | 1201 | ftest-coverage |
50431bc4 | 1202 | Common Report Var(flag_test_coverage) |
f3fdaec4 | 1203 | Create data files needed by \"gcov\" |
6ff3a151 | 1204 | |
de32c0cb | 1205 | fthread-jumps |
c662432e | 1206 | Common Report Var(flag_thread_jumps) Optimization |
f3fdaec4 | 1207 | Perform jump threading optimizations |
de32c0cb | 1208 | |
6ff3a151 | 1209 | ftime-report |
50431bc4 | 1210 | Common Report Var(time_report) |
f3fdaec4 | 1211 | Report the time taken by each compiler pass |
6ff3a151 | 1212 | |
058de654 NB |
1213 | ftls-model= |
1214 | Common Joined RejectNegative | |
cf03fd63 | 1215 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model |
058de654 | 1216 | |
474eccc6 | 1217 | ftoplevel-reorder |
d6cc6ec9 | 1218 | Common Report Var(flag_toplevel_reorder) Init(2) Optimization |
474eccc6 ILT |
1219 | Reorder top level functions, variables, and asms |
1220 | ||
de32c0cb | 1221 | ftracer |
50431bc4 | 1222 | Common Report Var(flag_tracer) |
f3fdaec4 | 1223 | Perform superblock formation via tail duplication |
de32c0cb | 1224 | |
31b66477 KC |
1225 | ; Zero means that floating-point math operations cannot generate a |
1226 | ; (user-visible) trap. This is the case, for example, in nonstop | |
1227 | ; IEEE 754 arithmetic. | |
6ff3a151 | 1228 | ftrapping-math |
c662432e | 1229 | Common Report Var(flag_trapping_math) Init(1) Optimization |
f3fdaec4 | 1230 | Assume floating-point operations can trap |
6ff3a151 NB |
1231 | |
1232 | ftrapv | |
c662432e | 1233 | Common Report Var(flag_trapv) Optimization |
f3fdaec4 | 1234 | Trap for signed overflow in addition, subtraction and multiplication |
6ff3a151 | 1235 | |
6de9cd9a | 1236 | ftree-ccp |
c662432e | 1237 | Common Report Var(flag_tree_ccp) Optimization |
6de9cd9a DN |
1238 | Enable SSA-CCP optimization on trees |
1239 | ||
0bca51f0 | 1240 | ftree-store-ccp |
dce2b2f6 RG |
1241 | Common |
1242 | Does nothing. Preserved for backward compatibility. | |
0bca51f0 | 1243 | |
6de9cd9a | 1244 | ftree-ch |
c662432e | 1245 | Common Report Var(flag_tree_ch) Optimization |
6de9cd9a DN |
1246 | Enable loop header copying on trees |
1247 | ||
6de9cd9a | 1248 | ftree-copyrename |
c662432e | 1249 | Common Report Var(flag_tree_copyrename) Optimization |
c85ce869 | 1250 | Replace SSA temporaries with better names in copies |
6de9cd9a | 1251 | |
0bca51f0 | 1252 | ftree-copy-prop |
c662432e | 1253 | Common Report Var(flag_tree_copy_prop) Optimization |
0bca51f0 DN |
1254 | Enable copy propagation on trees |
1255 | ||
1256 | ftree-store-copy-prop | |
324d2217 | 1257 | Common |
e9033855 | 1258 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 1259 | |
a5828d1e MM |
1260 | ftree-cselim |
1261 | Common Report Var(flag_tree_cselim) Init(2) Optimization | |
1262 | Transform condition stores into unconditional ones | |
1263 | ||
b6e99746 MJ |
1264 | ftree-switch-conversion |
1265 | Common Report Var(flag_tree_switch_conversion) Optimization | |
1266 | Perform conversions of switch initializations. | |
1267 | ||
6de9cd9a | 1268 | ftree-dce |
c662432e | 1269 | Common Report Var(flag_tree_dce) Optimization |
6de9cd9a DN |
1270 | Enable SSA dead code elimination optimization on trees |
1271 | ||
1272 | ftree-dominator-opts | |
c662432e | 1273 | Common Report Var(flag_tree_dom) Optimization |
6de9cd9a DN |
1274 | Enable dominator optimizations |
1275 | ||
1276 | ftree-dse | |
c662432e | 1277 | Common Report Var(flag_tree_dse) Optimization |
6de9cd9a DN |
1278 | Enable dead store elimination |
1279 | ||
248fc9f3 RG |
1280 | ftree-forwprop |
1281 | Common Report Var(flag_tree_forwprop) Init(1) Optimization | |
1282 | Enable forward propagation on trees | |
1283 | ||
ff2ad0f7 | 1284 | ftree-fre |
c662432e | 1285 | Common Report Var(flag_tree_fre) Optimization |
ff2ad0f7 DN |
1286 | Enable Full Redundancy Elimination (FRE) on trees |
1287 | ||
dea61d92 | 1288 | ftree-loop-distribution |
53ed2f0e | 1289 | Common Report Var(flag_tree_loop_distribution) Optimization |
dea61d92 SP |
1290 | Enable loop distribution on trees |
1291 | ||
1b08d87d | 1292 | ftree-loop-im |
c662432e | 1293 | Common Report Var(flag_tree_loop_im) Init(1) Optimization |
a7e5372d ZD |
1294 | Enable loop invariant motion on trees |
1295 | ||
599eabdb | 1296 | ftree-loop-linear |
c662432e | 1297 | Common Report Var(flag_tree_loop_linear) Optimization |
599eabdb DB |
1298 | Enable linear loop transforms on trees |
1299 | ||
1b08d87d | 1300 | ftree-loop-ivcanon |
c662432e | 1301 | Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization |
1b08d87d DB |
1302 | Create canonical induction variables in loops |
1303 | ||
c66b6c66 | 1304 | ftree-loop-optimize |
c662432e | 1305 | Common Report Var(flag_tree_loop_optimize) Init(1) Optimization |
c66b6c66 ZD |
1306 | Enable loop optimizations on tree level |
1307 | ||
5f40b3cb ZD |
1308 | ftree-parallelize-loops= |
1309 | Common Report Joined UInteger Var(flag_tree_parallelize_loops) Init(1) | |
1310 | Enable automatic parallelization of loops | |
1311 | ||
248fc9f3 RG |
1312 | ftree-phiprop |
1313 | Common Report Var(flag_tree_phiprop) Init(1) Optimization | |
1314 | Enable hoisting loads from conditional pointers. | |
1315 | ||
6de9cd9a | 1316 | ftree-pre |
c662432e | 1317 | Common Report Var(flag_tree_pre) Optimization |
6de9cd9a DN |
1318 | Enable SSA-PRE optimization on trees |
1319 | ||
248fc9f3 RG |
1320 | ftree-pta |
1321 | Common Report Var(flag_tree_pta) Init(1) Optimization | |
1322 | Perform function-local points-to analysis on trees. | |
1323 | ||
13c59415 UB |
1324 | ftree-reassoc |
1325 | Common Report Var(flag_tree_reassoc) Init(1) Optimization | |
1326 | Enable reassociation on tree level | |
1327 | ||
c75ab022 | 1328 | ftree-salias |
1353232d RG |
1329 | Common |
1330 | Does nothing. Preserved for backward compatibility. | |
c75ab022 | 1331 | |
fa555252 | 1332 | ftree-sink |
c662432e | 1333 | Common Report Var(flag_tree_sink) Optimization |
fa555252 DB |
1334 | Enable SSA code sinking on trees |
1335 | ||
6de9cd9a | 1336 | ftree-sra |
c662432e | 1337 | Common Report Var(flag_tree_sra) Optimization |
6de9cd9a DN |
1338 | Perform scalar replacement of aggregates |
1339 | ||
1340 | ftree-ter | |
c72321c9 | 1341 | Common Report Var(flag_tree_ter) Init(1) Optimization |
6de9cd9a DN |
1342 | Replace temporary expressions in the SSA->normal pass |
1343 | ||
c662432e NC |
1344 | ftree-lrs |
1345 | Common Report Var(flag_tree_live_range_split) Optimization | |
1346 | Perform live range splitting during the SSA->normal pass | |
1347 | ||
0bca51f0 | 1348 | ftree-vrp |
c662432e | 1349 | Common Report Var(flag_tree_vrp) Init(0) Optimization |
0bca51f0 DN |
1350 | Perform Value Range Propagation on trees |
1351 | ||
de32c0cb | 1352 | funit-at-a-time |
d6cc6ec9 | 1353 | Common Report Var(flag_unit_at_a_time) Init(1) Optimization |
f3fdaec4 | 1354 | Compile whole compilation unit at a time |
de32c0cb NB |
1355 | |
1356 | funroll-loops | |
c662432e | 1357 | Common Report Var(flag_unroll_loops) Optimization |
f3fdaec4 | 1358 | Perform loop unrolling when iteration count is known |
de32c0cb NB |
1359 | |
1360 | funroll-all-loops | |
c662432e | 1361 | Common Report Var(flag_unroll_all_loops) Optimization |
f3fdaec4 | 1362 | Perform loop unrolling for all loops |
de32c0cb | 1363 | |
f9cc1a70 PB |
1364 | ; Nonzero means that loop optimizer may assume that the induction variables |
1365 | ; that control loops do not overflow and that the loops with nontrivial | |
1366 | ; exit condition are not infinite | |
1367 | funsafe-loop-optimizations | |
c662432e | 1368 | Common Report Var(flag_unsafe_loop_optimizations) Optimization |
f9cc1a70 PB |
1369 | Allow loop optimizations to assume that the loops behave in normal way |
1370 | ||
a1a82611 RE |
1371 | fassociative-math |
1372 | Common Report Var(flag_associative_math) | |
1373 | Allow optimization for floating-point arithmetic which may change the | |
1374 | result of the operation due to rounding. | |
1375 | ||
1376 | freciprocal-math | |
1377 | Common Report Var(flag_reciprocal_math) | |
1378 | Same as -fassociative-math for expressions which include division. | |
1379 | ||
31b66477 KC |
1380 | ; Nonzero means that unsafe floating-point math optimizations are allowed |
1381 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
1382 | ; are allowed to assume that their arguments and results are "normal" | |
1383 | ; (e.g., nonnegative for SQRT). | |
6ff3a151 | 1384 | funsafe-math-optimizations |
c662432e | 1385 | Common Report Var(flag_unsafe_math_optimizations) Optimization |
f3fdaec4 | 1386 | Allow math optimizations that may violate IEEE or ISO standards |
6ff3a151 | 1387 | |
de32c0cb | 1388 | funswitch-loops |
c662432e | 1389 | Common Report Var(flag_unswitch_loops) Optimization |
f3fdaec4 | 1390 | Perform loop unswitching |
de32c0cb | 1391 | |
6ff3a151 | 1392 | funwind-tables |
c662432e | 1393 | Common Report Var(flag_unwind_tables) Optimization |
f3fdaec4 | 1394 | Just generate unwind tables for exception handling |
6ff3a151 | 1395 | |
da18ea94 RAE |
1396 | fuse-linker-plugin |
1397 | Common Undocumented | |
1398 | ||
014a1138 | 1399 | fvar-tracking |
c662432e | 1400 | Common Report Var(flag_var_tracking) VarExists Optimization |
014a1138 JZ |
1401 | Perform variable tracking |
1402 | ||
b5b8b0ac AO |
1403 | fvar-tracking-assignments |
1404 | Common Report Var(flag_var_tracking_assignments) VarExists Optimization | |
1405 | Perform variable tracking by annotating assignments | |
1406 | ||
1407 | fvar-tracking-assignments-toggle | |
1408 | Common Report Var(flag_var_tracking_assignments_toggle) VarExists Optimization | |
1409 | Toggle -fvar-tracking-assignments | |
1410 | ||
62760ffd CT |
1411 | fvar-tracking-uninit |
1412 | Common Report Var(flag_var_tracking_uninit) Optimization | |
1413 | Perform variable tracking and also tag variables that are uninitialized | |
1414 | ||
79fe1b3b | 1415 | ftree-vectorize |
c662432e | 1416 | Common Report Var(flag_tree_vectorize) Optimization |
79fe1b3b DN |
1417 | Enable loop vectorization on trees |
1418 | ||
a70d6342 IR |
1419 | ftree-slp-vectorize |
1420 | Common Report Var(flag_tree_slp_vectorize) Init(2) Optimization | |
1421 | Enable basic block vectorization (SLP) on trees | |
1422 | ||
792ed98b HJ |
1423 | fvect-cost-model |
1424 | Common Report Var(flag_vect_cost_model) Optimization | |
1425 | Enable use of cost model in vectorization | |
1426 | ||
c12cc930 | 1427 | ftree-vect-loop-version |
c662432e | 1428 | Common Report Var(flag_tree_vect_loop_version) Init(1) Optimization |
c12cc930 KB |
1429 | Enable loop versioning when doing loop vectorization on trees |
1430 | ||
c866976a LB |
1431 | ftree-vectorizer-verbose= |
1432 | Common RejectNegative Joined | |
4e994432 | 1433 | -ftree-vectorizer-verbose=<number> Set the verbosity level of the vectorizer |
c866976a | 1434 | |
fbf798fc | 1435 | ftree-scev-cprop |
21af5cdf | 1436 | Common Report Var(flag_tree_scev_cprop) Init(1) Optimization |
fbf798fc DN |
1437 | Enable copy propagation of scalar-evolution information. |
1438 | ||
31b66477 KC |
1439 | ; -fverbose-asm causes extra commentary information to be produced in |
1440 | ; the generated assembly code (to make it more readable). This option | |
1441 | ; is generally only of use to those who actually need to read the | |
1442 | ; generated assembly code (perhaps while debugging the compiler itself). | |
1443 | ; -fno-verbose-asm, the default, causes the extra information | |
1444 | ; to not be added and is useful when comparing two assembler files. | |
6ff3a151 | 1445 | fverbose-asm |
50431bc4 | 1446 | Common Report Var(flag_verbose_asm) |
f3fdaec4 | 1447 | Add extra commentary to assembler output |
6ff3a151 | 1448 | |
d7afec4b ND |
1449 | fvisibility= |
1450 | Common Joined RejectNegative | |
1451 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility | |
1452 | ||
1453 | ||
fca9dc00 | 1454 | fvpt |
c662432e | 1455 | Common Report Var(flag_value_profile_transformations) Optimization |
fca9dc00 ZD |
1456 | Use expression value profiles in optimizations |
1457 | ||
62551c66 | 1458 | fweb |
c662432e | 1459 | Common Report Var(flag_web) Init(2) Optimization |
62551c66 JH |
1460 | Construct webs and split unrelated uses of single variable |
1461 | ||
d7f09764 DN |
1462 | fwhopr |
1463 | Common Var(flag_whopr) | |
1464 | Enable partitioned link-time optimization. | |
1465 | ||
c2699190 XDL |
1466 | ftree-builtin-call-dce |
1467 | Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization | |
1468 | Enable conditional dead code elimination for builtin calls | |
1469 | ||
ce91e74c | 1470 | fwhole-program |
c662432e | 1471 | Common Report Var(flag_whole_program) Init(0) Optimization |
ce91e74c JH |
1472 | Perform whole program optimizations |
1473 | ||
6ff3a151 | 1474 | fwrapv |
c662432e | 1475 | Common Report Var(flag_wrapv) Optimization |
f3fdaec4 | 1476 | Assume signed arithmetic overflow wraps around |
6ff3a151 | 1477 | |
6ff3a151 | 1478 | fzero-initialized-in-bss |
50431bc4 | 1479 | Common Report Var(flag_zero_initialized_in_bss) Init(1) |
f3fdaec4 | 1480 | Put zero initialized data in the bss section |
6ff3a151 | 1481 | |
e01cc6dc NB |
1482 | g |
1483 | Common JoinedOrMissing | |
df38ffef NB |
1484 | Generate debug information in default format |
1485 | ||
1486 | gcoff | |
53b2323e | 1487 | Common JoinedOrMissing Negative(gdwarf-) |
df38ffef NB |
1488 | Generate debug information in COFF format |
1489 | ||
53b2323e RH |
1490 | gdwarf- |
1491 | Common Joined UInteger Var(dwarf_version) Init(2) Negative(gstabs) | |
1492 | Generate debug information in DWARF v2 (or later) format | |
df38ffef NB |
1493 | |
1494 | ggdb | |
1495 | Common JoinedOrMissing | |
1496 | Generate debug information in default extended format | |
1497 | ||
1498 | gstabs | |
14c7833c | 1499 | Common JoinedOrMissing Negative(gstabs+) |
df38ffef NB |
1500 | Generate debug information in STABS format |
1501 | ||
1502 | gstabs+ | |
14c7833c | 1503 | Common JoinedOrMissing Negative(gvms) |
df38ffef NB |
1504 | Generate debug information in extended STABS format |
1505 | ||
65f753a0 | 1506 | gno-strict-dwarf |
047a3193 | 1507 | Common RejectNegative Var(dwarf_strict,0) Init(-1) |
65f753a0 JJ |
1508 | Emit DWARF additions beyond selected version |
1509 | ||
1510 | gstrict-dwarf | |
1511 | Common Report RejectNegative Var(dwarf_strict,1) VarExists | |
1512 | Don't emit DWARF additions beyond selected version | |
1513 | ||
2153915d AO |
1514 | gtoggle |
1515 | Common Report Var(flag_gtoggle) | |
1516 | Toggle debug information generation | |
1517 | ||
df38ffef | 1518 | gvms |
14c7833c | 1519 | Common JoinedOrMissing Negative(gxcoff) |
df38ffef NB |
1520 | Generate debug information in VMS format |
1521 | ||
1522 | gxcoff | |
14c7833c | 1523 | Common JoinedOrMissing Negative(gxcoff+) |
df38ffef NB |
1524 | Generate debug information in XCOFF format |
1525 | ||
1526 | gxcoff+ | |
14c7833c | 1527 | Common JoinedOrMissing Negative(gcoff) |
df38ffef | 1528 | Generate debug information in extended XCOFF format |
e01cc6dc | 1529 | |
d185d268 NB |
1530 | o |
1531 | Common Joined Separate | |
cf03fd63 | 1532 | -o <file> Place output into <file> |
d185d268 NB |
1533 | |
1534 | p | |
50431bc4 | 1535 | Common Var(profile_flag) |
cf03fd63 | 1536 | Enable function profiling |
d185d268 NB |
1537 | |
1538 | pedantic | |
50431bc4 | 1539 | Common Var(pedantic) |
cf03fd63 | 1540 | Issue warnings needed for strict compliance to the standard |
d185d268 NB |
1541 | |
1542 | pedantic-errors | |
1543 | Common | |
cf03fd63 | 1544 | Like -pedantic but issue them as errors |
d185d268 | 1545 | |
d7b42618 | 1546 | quiet |
50431bc4 | 1547 | Common Var(quiet_flag) |
cf03fd63 | 1548 | Do not display functions compiled or elapsed time |
d7b42618 | 1549 | |
d185d268 | 1550 | version |
50431bc4 | 1551 | Common Var(version_flag) |
cf03fd63 | 1552 | Display the compiler's version |
d185d268 NB |
1553 | |
1554 | w | |
50431bc4 | 1555 | Common Var(inhibit_warnings) |
cf03fd63 | 1556 | Suppress warnings |
d185d268 | 1557 | |
528dc603 L |
1558 | shared |
1559 | Common RejectNegative Negative(pie) | |
1560 | Create a shared library | |
1561 | ||
1562 | pie | |
1563 | Common RejectNegative Negative(shared) | |
1564 | Create a position independent executable | |
1565 | ||
d7b42618 | 1566 | ; This comment is to ensure we retain the blank line above. |