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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 | |
28a08168 ILT |
3 | ; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 |
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 | ||
38 | ;; The following three entries are to work around the gcc driver | |
39 | ;; program's insatiable desire to turn options starting with a | |
40 | ;; double dash (--) into options starting with a dash f (-f). | |
41 | fhelp | |
42 | Common | |
43 | ||
44 | fhelp= | |
45 | Common Joined | |
46 | ||
47 | ftarget-help | |
48 | Common | |
49 | ||
50 | -param | |
51 | Common Separate | |
52 | --param <param>=<value> Set parameter <param> to value. See below for a complete list of parameters | |
d185d268 NB |
53 | |
54 | -version | |
55 | Common | |
56 | ||
57 | G | |
7b086b11 | 58 | Common Joined Separate UInteger |
cf03fd63 | 59 | -G<number> Put global and static data smaller than <number> bytes into a special section (on some targets) |
d185d268 | 60 | |
903caebf NB |
61 | O |
62 | Common JoinedOrMissing | |
cf03fd63 | 63 | -O<number> Set optimization level to <number> |
903caebf NB |
64 | |
65 | Os | |
66 | Common | |
cf03fd63 | 67 | Optimize for space rather than speed |
903caebf NB |
68 | |
69 | W | |
70 | Common RejectNegative | |
28786366 | 71 | This switch is deprecated; use -Wextra instead |
903caebf | 72 | |
e01cc6dc | 73 | Waggregate-return |
c662432e | 74 | Common Var(warn_aggregate_return) Warning |
28786366 | 75 | Warn about returning structures, unions or arrays |
e01cc6dc | 76 | |
590b1f2d | 77 | Warray-bounds |
21af5cdf | 78 | Common Var(warn_array_bounds) Warning |
590b1f2d DM |
79 | Warn if an array is accessed out of bounds |
80 | ||
5c498b10 | 81 | Wattributes |
c662432e | 82 | Common Var(warn_attributes) Init(1) Warning |
5c498b10 DD |
83 | Warn about inappropriate attribute usage |
84 | ||
e01cc6dc | 85 | Wcast-align |
c662432e | 86 | Common Var(warn_cast_align) Warning |
28786366 | 87 | Warn about pointer casts which increase alignment |
e01cc6dc NB |
88 | |
89 | Wdeprecated-declarations | |
c662432e | 90 | Common Var(warn_deprecated_decl) Init(1) Warning |
28786366 | 91 | Warn about uses of __attribute__((deprecated)) declarations |
e01cc6dc NB |
92 | |
93 | Wdisabled-optimization | |
c662432e | 94 | Common Var(warn_disabled_optimization) Warning |
28786366 | 95 | Warn when an optimization pass is disabled |
e01cc6dc NB |
96 | |
97 | Werror | |
50431bc4 | 98 | Common Var(warnings_are_errors) |
28786366 | 99 | Treat all warnings as errors |
e01cc6dc | 100 | |
79cf5994 DD |
101 | Werror= |
102 | Common Joined | |
103 | Treat specified warning as error | |
104 | ||
903caebf | 105 | Wextra |
c662432e | 106 | Common Warning |
cf03fd63 | 107 | Print extra (possibly unwanted) warnings |
903caebf | 108 | |
c65a01af | 109 | Wfatal-errors |
50431bc4 | 110 | Common Var(flag_fatal_errors) |
c65a01af RG |
111 | Exit on the first error occurred |
112 | ||
a214518f SP |
113 | Wframe-larger-than= |
114 | Common RejectNegative Joined UInteger | |
c1a3620a | 115 | -Wframe-larger-than=<number> Warn if a function's stack frame requires more than <number> bytes |
a214518f | 116 | |
e01cc6dc | 117 | Winline |
c662432e | 118 | Common Var(warn_inline) Warning |
28786366 | 119 | Warn when an inlined function cannot be inlined |
e01cc6dc NB |
120 | |
121 | Wlarger-than- | |
c662432e | 122 | Common RejectNegative Joined UInteger Warning |
e8fc888d MLI |
123 | |
124 | Wlarger-than= | |
125 | Common RejectNegative Joined UInteger Warning | |
126 | -Wlarger-than=<number> Warn if an object is larger than <number> bytes | |
e01cc6dc | 127 | |
63a08740 DM |
128 | Wlogical-op |
129 | Common Warning Var(warn_logical_op) | |
130 | Warn when a logical operator is suspicously always evaluating to true or false | |
131 | ||
f9cc1a70 | 132 | Wunsafe-loop-optimizations |
c662432e | 133 | Common Var(warn_unsafe_loop_optimizations) Warning |
f9cc1a70 PB |
134 | Warn if the loop cannot be optimized due to nontrivial assumptions. |
135 | ||
e01cc6dc | 136 | Wmissing-noreturn |
c662432e | 137 | Common Var(warn_missing_noreturn) Warning |
28786366 | 138 | Warn about functions which might be candidates for __attribute__((noreturn)) |
e01cc6dc | 139 | |
7621f5d5 VR |
140 | Wmudflap |
141 | Common Var(warn_mudflap) Init(1) Warning | |
142 | Warn about constructs not instrumented by -fmudflap | |
143 | ||
71834ad3 | 144 | Woverflow |
c662432e | 145 | Common Var(warn_overflow) Init(1) Warning |
71834ad3 RS |
146 | Warn about overflow in arithmetic expressions |
147 | ||
e01cc6dc | 148 | Wpacked |
c662432e | 149 | Common Var(warn_packed) Warning |
28786366 | 150 | Warn when the packed attribute has no effect on struct layout |
e01cc6dc NB |
151 | |
152 | Wpadded | |
c662432e | 153 | Common Var(warn_padded) Warning |
28786366 | 154 | Warn when padding is required to align structure members |
e01cc6dc NB |
155 | |
156 | Wshadow | |
c662432e | 157 | Common Var(warn_shadow) Warning |
28786366 | 158 | Warn when one local variable shadows another |
e01cc6dc | 159 | |
7d69de61 | 160 | Wstack-protector |
c662432e | 161 | Common Var(warn_stack_protect) Warning |
7d69de61 RH |
162 | Warn when not issuing stack smashing protection for some reason |
163 | ||
e01cc6dc | 164 | Wstrict-aliasing |
c662432e | 165 | Common Warning |
28786366 | 166 | Warn about code which might break strict aliasing rules |
e01cc6dc | 167 | |
5399d643 | 168 | Wstrict-aliasing= |
027b740e | 169 | Common Joined UInteger Var(warn_strict_aliasing) Init(-1) Warning |
5399d643 JW |
170 | Warn about code which might break strict aliasing rules |
171 | ||
6ac01510 | 172 | Wstrict-overflow |
21af5cdf | 173 | Common Warning |
6ac01510 ILT |
174 | Warn about optimizations that assume that signed overflow is undefined |
175 | ||
176 | Wstrict-overflow= | |
027b740e | 177 | Common Joined UInteger Var(warn_strict_overflow) Init(-1) Warning |
6ac01510 ILT |
178 | Warn about optimizations that assume that signed overflow is undefined |
179 | ||
e01cc6dc | 180 | Wswitch |
c662432e | 181 | Common Var(warn_switch) Warning |
28786366 | 182 | Warn about enumerated switches, with no default, missing a case |
e01cc6dc NB |
183 | |
184 | Wswitch-default | |
c662432e | 185 | Common Var(warn_switch_default) Warning |
28786366 | 186 | Warn about enumerated switches missing a \"default:\" statement |
e01cc6dc NB |
187 | |
188 | Wswitch-enum | |
c662432e | 189 | Common Var(warn_switch_enum) Warning |
28786366 | 190 | Warn about all enumerated switches missing a specific case |
e01cc6dc NB |
191 | |
192 | Wsystem-headers | |
c662432e | 193 | Common Var(warn_system_headers) Warning |
f3fdaec4 | 194 | Do not suppress warnings from system headers |
e01cc6dc | 195 | |
faebccf9 DN |
196 | Wtype-limits |
197 | Common Var(warn_type_limits) Init(-1) Warning | |
198 | Warn if a comparison is always true or always false due to the limited range of the data type | |
199 | ||
e01cc6dc | 200 | Wuninitialized |
c662432e | 201 | Common Var(warn_uninitialized) Warning |
28786366 | 202 | Warn about uninitialized automatic variables |
e01cc6dc NB |
203 | |
204 | Wunreachable-code | |
c662432e | 205 | Common Var(warn_notreached) Warning |
28786366 | 206 | Warn about code that will never be executed |
e01cc6dc | 207 | |
903caebf | 208 | Wunused |
c662432e | 209 | Common Warning |
cf03fd63 | 210 | Enable all -Wunused- warnings |
903caebf | 211 | |
e01cc6dc | 212 | Wunused-function |
c662432e | 213 | Common Var(warn_unused_function) Warning |
28786366 | 214 | Warn when a function is unused |
e01cc6dc NB |
215 | |
216 | Wunused-label | |
c662432e | 217 | Common Var(warn_unused_label) Warning |
28786366 | 218 | Warn when a label is unused |
e01cc6dc NB |
219 | |
220 | Wunused-parameter | |
c662432e | 221 | Common Var(warn_unused_parameter) Warning |
28786366 | 222 | Warn when a function parameter is unused |
e01cc6dc NB |
223 | |
224 | Wunused-value | |
c662432e | 225 | Common Var(warn_unused_value) Warning |
28786366 | 226 | Warn when an expression value is unused |
e01cc6dc NB |
227 | |
228 | Wunused-variable | |
c662432e | 229 | Common Var(warn_unused_variable) Warning |
28786366 | 230 | Warn when a variable is unused |
e01cc6dc | 231 | |
16c1c158 | 232 | Wcoverage-mismatch |
21af5cdf | 233 | Common RejectNegative Var(warn_coverage_mismatch) Warning |
16c1c158 RG |
234 | Warn instead of error in case profiles in -fprofile-use do not match |
235 | ||
d185d268 NB |
236 | aux-info |
237 | Common Separate | |
cf03fd63 | 238 | -aux-info <file> Emit declaration information into <file> |
d185d268 NB |
239 | |
240 | aux-info= | |
241 | Common Joined | |
242 | ||
243 | auxbase | |
244 | Common Separate | |
245 | ||
246 | auxbase-strip | |
247 | Common Separate | |
248 | ||
249 | d | |
250 | Common Joined | |
cf03fd63 | 251 | -d<letters> Enable dumps from specific passes of the compiler |
d185d268 NB |
252 | |
253 | dumpbase | |
254 | Common Separate | |
cf03fd63 | 255 | -dumpbase <file> Set the file basename to be used for dumps |
d185d268 | 256 | |
31b66477 KC |
257 | ; The version of the C++ ABI in use. The following values are allowed: |
258 | ; | |
259 | ; 0: The version of the ABI believed most conformant with the C++ ABI | |
260 | ; specification. This ABI may change as bugs are discovered and fixed. | |
261 | ; Therefore, 0 will not necessarily indicate the same ABI in different | |
262 | ; versions of G++. | |
263 | ; | |
264 | ; 1: The version of the ABI first used in G++ 3.2. | |
265 | ; | |
99a8d35b ET |
266 | ; 2: The version of the ABI first used in G++ 3.4. |
267 | ; | |
31b66477 KC |
268 | ; Additional positive integers will be assigned as new versions of |
269 | ; the ABI become the default version of the ABI. | |
57782ad8 | 270 | fabi-version= |
50431bc4 | 271 | Common Joined UInteger Var(flag_abi_version) Init(2) |
57782ad8 | 272 | |
6ff3a151 | 273 | falign-functions |
50431bc4 | 274 | Common Report Var(align_functions,0) |
f3fdaec4 | 275 | Align the start of functions |
6ff3a151 | 276 | |
058de654 NB |
277 | falign-functions= |
278 | Common RejectNegative Joined UInteger | |
279 | ||
6ff3a151 | 280 | falign-jumps |
c662432e | 281 | Common Report Var(align_jumps,0) Optimization |
f3fdaec4 | 282 | Align labels which are only reached by jumping |
6ff3a151 | 283 | |
058de654 NB |
284 | falign-jumps= |
285 | Common RejectNegative Joined UInteger | |
286 | ||
6ff3a151 | 287 | falign-labels |
c662432e | 288 | Common Report Var(align_labels,0) Optimization |
f3fdaec4 | 289 | Align all labels |
6ff3a151 | 290 | |
058de654 NB |
291 | falign-labels= |
292 | Common RejectNegative Joined UInteger | |
293 | ||
6ff3a151 | 294 | falign-loops |
c662432e | 295 | Common Report Var(align_loops) Optimization |
f3fdaec4 | 296 | Align the start of loops |
6ff3a151 | 297 | |
058de654 NB |
298 | falign-loops= |
299 | Common RejectNegative Joined UInteger | |
300 | ||
31b66477 KC |
301 | ; This flag is only tested if alias checking is enabled. |
302 | ; 0 if pointer arguments may alias each other. True in C. | |
303 | ; 1 if pointer arguments may not alias each other but may alias | |
304 | ; global variables. | |
305 | ; 2 if pointer arguments may not alias each other and may not | |
0698a1d2 TM |
306 | ; alias global variables. |
307 | ; 3 if pointer arguments may not alias anything. True in Fortran. | |
308 | ; Set by the front end. | |
6ff3a151 | 309 | fargument-alias |
c662432e | 310 | Common Report Var(flag_argument_noalias,0) Optimization |
f3fdaec4 | 311 | Specify that arguments may alias each other and globals |
6ff3a151 NB |
312 | |
313 | fargument-noalias | |
c662432e | 314 | Common Report Var(flag_argument_noalias,1) VarExists Optimization |
f3fdaec4 | 315 | Assume arguments may alias globals but not each other |
6ff3a151 NB |
316 | |
317 | fargument-noalias-global | |
c662432e | 318 | Common Report Var(flag_argument_noalias,2) VarExists Optimization |
f3fdaec4 | 319 | Assume arguments alias neither each other nor globals |
6ff3a151 | 320 | |
0698a1d2 | 321 | fargument-noalias-anything |
c662432e | 322 | Common Report Var(flag_argument_noalias,3) VarExists Optimization |
0698a1d2 TM |
323 | Assume arguments alias no other storage |
324 | ||
6ff3a151 | 325 | fasynchronous-unwind-tables |
c662432e | 326 | Common Report Var(flag_asynchronous_unwind_tables) Optimization |
f3fdaec4 | 327 | Generate unwind tables that are exact at each instruction boundary |
6ff3a151 | 328 | |
6fb5fa3c DB |
329 | fauto-inc-dec |
330 | Common Report Var(flag_auto_inc_dec) Init(1) | |
331 | Generate auto-inc/dec instructions | |
332 | ||
31b66477 KC |
333 | ; -fcheck-bounds causes gcc to generate array bounds checks. |
334 | ; For C, C++ and ObjC: defaults off. | |
335 | ; For Java: defaults to on. | |
336 | ; For Fortran: defaults to off. | |
6ff3a151 | 337 | fbounds-check |
50431bc4 | 338 | Common Report Var(flag_bounds_check) |
f3fdaec4 | 339 | Generate code to check bounds before indexing arrays |
6ff3a151 NB |
340 | |
341 | fbranch-count-reg | |
c662432e | 342 | Common Report Var(flag_branch_on_count_reg) Init(1) Optimization |
f3fdaec4 | 343 | Replace add, compare, branch with branch on count register |
6ff3a151 NB |
344 | |
345 | fbranch-probabilities | |
c662432e | 346 | Common Report Var(flag_branch_probabilities) Optimization |
f3fdaec4 | 347 | Use profiling information for branch probabilities |
6ff3a151 | 348 | |
de32c0cb | 349 | fbranch-target-load-optimize |
c662432e | 350 | Common Report Var(flag_branch_target_load_optimize) Optimization |
f3fdaec4 | 351 | Perform branch target load optimization before prologue / epilogue threading |
de32c0cb NB |
352 | |
353 | fbranch-target-load-optimize2 | |
c662432e | 354 | Common Report Var(flag_branch_target_load_optimize2) Optimization |
f3fdaec4 | 355 | Perform branch target load optimization after prologue / epilogue threading |
de32c0cb | 356 | |
1194fc79 | 357 | fbtr-bb-exclusive |
c662432e | 358 | Common Report Var(flag_btr_bb_exclusive) Optimization |
1194fc79 R |
359 | Restrict target load migration not to re-use registers in any basic block |
360 | ||
058de654 NB |
361 | fcall-saved- |
362 | Common Joined RejectNegative | |
cf03fd63 | 363 | -fcall-saved-<register> Mark <register> as being preserved across functions |
058de654 NB |
364 | |
365 | fcall-used- | |
366 | Common Joined RejectNegative | |
cf03fd63 | 367 | -fcall-used-<register> Mark <register> as being corrupted by function calls |
058de654 | 368 | |
31b66477 KC |
369 | ; Nonzero for -fcaller-saves: allocate values in regs that need to |
370 | ; be saved across function calls, if that produces overall better code. | |
371 | ; Optional now, so people can test it. | |
de32c0cb | 372 | fcaller-saves |
c662432e | 373 | Common Report Var(flag_caller_saves) Optimization |
f3fdaec4 | 374 | Save registers around function calls |
de32c0cb | 375 | |
3d8864c0 SP |
376 | fcheck-data-deps |
377 | Common Report Var(flag_check_data_deps) | |
378 | Compare the results of several data dependence analyzers. | |
379 | ||
6ff3a151 | 380 | fcommon |
c662432e | 381 | Common Report Var(flag_no_common,0) Optimization |
f3fdaec4 | 382 | Do not put uninitialized globals in the common section |
6ff3a151 NB |
383 | |
384 | fcprop-registers | |
c662432e | 385 | Common Report Var(flag_cprop_registers) Optimization |
f3fdaec4 | 386 | Perform a register copy-propagation optimization pass |
6ff3a151 | 387 | |
de32c0cb | 388 | fcrossjumping |
c662432e | 389 | Common Report Var(flag_crossjumping) Optimization |
f3fdaec4 | 390 | Perform cross-jumping optimization |
de32c0cb NB |
391 | |
392 | fcse-follow-jumps | |
c662432e | 393 | Common Report Var(flag_cse_follow_jumps) Optimization |
f3fdaec4 | 394 | When running CSE, follow jumps to their targets |
de32c0cb NB |
395 | |
396 | fcse-skip-blocks | |
c662432e | 397 | Common Report Var(flag_cse_skip_blocks) Optimization |
f3fdaec4 | 398 | When running CSE, follow conditional jumps |
de32c0cb | 399 | |
c7463669 | 400 | fcx-limited-range |
c662432e | 401 | Common Report Var(flag_cx_limited_range) Optimization |
c7463669 RH |
402 | Omit range reduction step when performing complex division |
403 | ||
35085f76 JB |
404 | fcx-fortran-rules |
405 | Common Report Var(flag_cx_fortran_rules) Optimization | |
406 | Complex multiplication and division follow Fortran rules | |
407 | ||
6ff3a151 | 408 | fdata-sections |
c662432e | 409 | Common Report Var(flag_data_sections) Optimization |
f3fdaec4 | 410 | Place data items into their own section |
6ff3a151 | 411 | |
0a090f42 SP |
412 | fdbg-cnt-list |
413 | Common Report | |
414 | List all available debugging counters with their limits and counts. | |
415 | ||
6fb5fa3c DB |
416 | fdbg-cnt= |
417 | Common RejectNegative Joined | |
0a090f42 | 418 | -fdbg-cnt=<counter>:<limit>[,<counter>:<limit>,...] Set the debug counter limit. |
6fb5fa3c | 419 | |
c8aea42c PB |
420 | fdebug-prefix-map= |
421 | Common Joined RejectNegative | |
422 | Map one directory name to another in debug information | |
423 | ||
31b66477 KC |
424 | ; Nonzero for -fdefer-pop: don't pop args after each function call |
425 | ; instead save them up to pop many calls' args with one insns. | |
de32c0cb | 426 | fdefer-pop |
c662432e | 427 | Common Report Var(flag_defer_pop) Optimization |
f3fdaec4 | 428 | Defer popping functions args from stack until later |
de32c0cb NB |
429 | |
430 | fdelayed-branch | |
c662432e | 431 | Common Report Var(flag_delayed_branch) Optimization |
f3fdaec4 | 432 | Attempt to fill delay slots of branch instructions |
de32c0cb NB |
433 | |
434 | fdelete-null-pointer-checks | |
c662432e | 435 | Common Report Var(flag_delete_null_pointer_checks) Optimization |
f3fdaec4 | 436 | Delete useless null pointer checks |
de32c0cb NB |
437 | |
438 | fdiagnostics-show-location= | |
439 | Common Joined RejectNegative | |
cf03fd63 | 440 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics |
de32c0cb | 441 | |
ccf08a6e | 442 | fdiagnostics-show-option |
2098fe9e | 443 | Common |
c85ce869 | 444 | Amend appropriate diagnostic messages with the command line option that controls them |
ccf08a6e | 445 | |
6de9cd9a DN |
446 | fdump- |
447 | Common Joined RejectNegative | |
448 | -fdump-<type> Dump various compiler internals to a file | |
449 | ||
24a7799e R |
450 | fdump-noaddr |
451 | Common Report Var(flag_dump_noaddr) | |
452 | Suppress output of addresses in debugging dumps | |
453 | ||
6ff3a151 | 454 | fdump-unnumbered |
50431bc4 | 455 | Common Report Var(flag_dump_unnumbered) VarExists |
24a7799e | 456 | Suppress output of instruction numbers, line number notes and addresses in debugging dumps |
6ff3a151 | 457 | |
355866de | 458 | fearly-inlining |
c662432e | 459 | Common Report Var(flag_early_inlining) Init(1) Optimization |
355866de RG |
460 | Perform early inlining |
461 | ||
de32c0cb | 462 | feliminate-dwarf2-dups |
50431bc4 | 463 | Common Report Var(flag_eliminate_dwarf2_dups) |
f3fdaec4 | 464 | Perform DWARF2 duplicate elimination |
de32c0cb | 465 | |
6a08f7b3 | 466 | feliminate-unused-debug-symbols |
50431bc4 | 467 | Common Report Var(flag_debug_only_used_symbols) |
f3fdaec4 | 468 | Perform unused type elimination in debug info |
6a08f7b3 | 469 | |
de32c0cb | 470 | feliminate-unused-debug-types |
50431bc4 | 471 | Common Report Var(flag_eliminate_unused_debug_types) Init(1) |
f3fdaec4 | 472 | Perform unused type elimination in debug info |
de32c0cb | 473 | |
e713adf6 | 474 | femit-class-debug-always |
eae8e474 | 475 | Common Report Var(flag_emit_class_debug_always) Init(0) |
e713adf6 CD |
476 | Do not suppress C++ class debug information. |
477 | ||
6ff3a151 | 478 | fexceptions |
c662432e | 479 | Common Report Var(flag_exceptions) Optimization |
f3fdaec4 | 480 | Enable exception handling |
6ff3a151 | 481 | |
de32c0cb | 482 | fexpensive-optimizations |
c662432e | 483 | Common Report Var(flag_expensive_optimizations) Optimization |
f3fdaec4 | 484 | Perform a number of minor, expensive optimizations |
de32c0cb | 485 | |
058de654 NB |
486 | ffast-math |
487 | Common | |
488 | ||
6ff3a151 | 489 | ffinite-math-only |
c662432e | 490 | Common Report Var(flag_finite_math_only) Optimization |
f3fdaec4 | 491 | Assume no NaNs or infinities are generated |
6ff3a151 | 492 | |
058de654 NB |
493 | ffixed- |
494 | Common Joined RejectNegative | |
cf03fd63 | 495 | -ffixed-<register> Mark <register> as being unavailable to the compiler |
058de654 | 496 | |
de32c0cb | 497 | ffloat-store |
c662432e | 498 | Common Report Var(flag_float_store) Optimization |
31b66477 | 499 | Don't allocate floats and doubles in extended-precision registers |
de32c0cb NB |
500 | |
501 | fforce-addr | |
3de5e93a SB |
502 | Common |
503 | Does nothing. Preserved for backward compatibility. | |
de32c0cb | 504 | |
2ca2b607 SB |
505 | fforward-propagate |
506 | Common Report Var(flag_forward_propagate) Optimization | |
a52b023a PB |
507 | Perform a forward propagation pass on RTL |
508 | ||
31b66477 KC |
509 | ; Nonzero means don't put addresses of constant functions in registers. |
510 | ; Used for compiling the Unix kernel, where strange substitutions are | |
511 | ; done on the assembly output. | |
de32c0cb | 512 | ffunction-cse |
50431bc4 | 513 | Common Report Var(flag_no_function_cse,0) |
f3fdaec4 | 514 | Allow function addresses to be held in registers |
de32c0cb | 515 | |
6ff3a151 | 516 | ffunction-sections |
50431bc4 | 517 | Common Report Var(flag_function_sections) |
f3fdaec4 | 518 | Place each function into its own section |
6ff3a151 | 519 | |
de32c0cb | 520 | fgcse |
c662432e | 521 | Common Report Var(flag_gcse) Optimization |
f3fdaec4 | 522 | Perform global common subexpression elimination |
de32c0cb NB |
523 | |
524 | fgcse-lm | |
c662432e | 525 | Common Report Var(flag_gcse_lm) Init(1) Optimization |
f3fdaec4 | 526 | Perform enhanced load motion during global common subexpression elimination |
de32c0cb NB |
527 | |
528 | fgcse-sm | |
c662432e | 529 | Common Report Var(flag_gcse_sm) Init(0) Optimization |
f3fdaec4 | 530 | Perform store motion after global common subexpression elimination |
de32c0cb | 531 | |
f5f2e3cd | 532 | fgcse-las |
c662432e | 533 | Common Report Var(flag_gcse_las) Init(0) Optimization |
f9957958 MH |
534 | Perform redundant load after store elimination in global common subexpression |
535 | elimination | |
536 | ||
537 | fgcse-after-reload | |
c662432e | 538 | Common Report Var(flag_gcse_after_reload) Optimization |
f9957958 | 539 | Perform global common subexpression elimination after register allocation |
c85ce869 | 540 | has finished |
f5f2e3cd | 541 | |
6ff3a151 | 542 | fguess-branch-probability |
c662432e | 543 | Common Report Var(flag_guess_branch_prob) Optimization |
f3fdaec4 | 544 | Enable guessing of branch probabilities |
6ff3a151 | 545 | |
31b66477 KC |
546 | ; Nonzero means ignore `#ident' directives. 0 means handle them. |
547 | ; Generate position-independent code for executables if possible | |
548 | ; On SVR4 targets, it also controls whether or not to emit a | |
549 | ; string identifying the compiler. | |
6ff3a151 | 550 | fident |
50431bc4 | 551 | Common Report Var(flag_no_ident,0) |
f3fdaec4 | 552 | Process #ident directives |
6ff3a151 | 553 | |
de32c0cb | 554 | fif-conversion |
c662432e | 555 | Common Report Var(flag_if_conversion) Optimization |
f3fdaec4 | 556 | Perform conversion of conditional jumps to branchless equivalents |
de32c0cb NB |
557 | |
558 | fif-conversion2 | |
c662432e | 559 | Common Report Var(flag_if_conversion2) Optimization |
f3fdaec4 | 560 | Perform conversion of conditional jumps to conditional execution |
de32c0cb | 561 | |
31b66477 KC |
562 | ; -finhibit-size-directive inhibits output of .size for ELF. |
563 | ; This is used only for compiling crtstuff.c, | |
564 | ; and it may be extended to other effects | |
565 | ; needed for crtstuff.c on other systems. | |
6ff3a151 | 566 | finhibit-size-directive |
50431bc4 | 567 | Common Report Var(flag_inhibit_size_directive) |
f3fdaec4 | 568 | Do not generate .size directives |
6ff3a151 | 569 | |
31b66477 KC |
570 | ; Nonzero means that functions declared `inline' will be treated |
571 | ; as `static'. Prevents generation of zillions of copies of unused | |
572 | ; static inline functions; instead, `inlines' are written out | |
573 | ; only when actually used. Used in conjunction with -g. Also | |
574 | ; does the right thing with #pragma interface. | |
de32c0cb | 575 | finline |
50431bc4 | 576 | Common Report Var(flag_no_inline,0) Init(2) |
f3fdaec4 | 577 | Pay attention to the \"inline\" keyword |
de32c0cb | 578 | |
4d4b8cb9 JH |
579 | finline-small-functions |
580 | Common Report Var(flag_inline_small_functions) Optimization | |
581 | Integrate simple functions into their callers when code size is known to not growth | |
582 | ||
de32c0cb | 583 | finline-functions |
c662432e | 584 | Common Report Var(flag_inline_functions) Optimization |
f3fdaec4 | 585 | Integrate simple functions into their callers |
de32c0cb | 586 | |
355866de | 587 | finline-functions-called-once |
c662432e | 588 | Common Report Var(flag_inline_functions_called_once) Init(1) Optimization |
355866de | 589 | Integrate functions called once into their callers |
d63db217 | 590 | |
d302c9d6 NB |
591 | finline-limit- |
592 | Common RejectNegative Joined UInteger | |
593 | ||
594 | finline-limit= | |
595 | Common RejectNegative Joined UInteger | |
cf03fd63 | 596 | -finline-limit=<number> Limit the size of inlined functions to <number> |
d302c9d6 | 597 | |
6ff3a151 | 598 | finstrument-functions |
50431bc4 | 599 | Common Report Var(flag_instrument_function_entry_exit) |
f3fdaec4 | 600 | Instrument function entry and exit with profiling calls |
6ff3a151 | 601 | |
8d5a7d1f ILT |
602 | finstrument-functions-exclude-function-list= |
603 | Common RejectNegative Joined | |
604 | -finstrument-functions-exclude-function-list=name,... Do not instrument listed functions | |
605 | ||
606 | finstrument-functions-exclude-file-list= | |
607 | Common RejectNegative Joined | |
608 | -finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files | |
609 | ||
d6e14e8f | 610 | fipa-cp |
c662432e | 611 | Common Report Var(flag_ipa_cp) Optimization |
d6e14e8f SB |
612 | Perform Interprocedural constant propagation |
613 | ||
ea900239 | 614 | fipa-pure-const |
c662432e | 615 | Common Report Var(flag_ipa_pure_const) Init(0) Optimization |
ea900239 DB |
616 | Discover pure and const functions |
617 | ||
4cf4d6a3 | 618 | fipa-pta |
c662432e | 619 | Common Report Var(flag_ipa_pta) Init(0) Optimization |
4cf4d6a3 DB |
620 | Perform interprocedural points-to analysis |
621 | ||
ea900239 | 622 | fipa-reference |
c662432e | 623 | Common Report Var(flag_ipa_reference) Init(0) Optimization |
ea900239 DB |
624 | Discover readonly and non addressable static variables |
625 | ||
626 | fipa-type-escape | |
c662432e | 627 | Common Report Var(flag_ipa_type_escape) Init(0) Optimization |
ea900239 DB |
628 | Type based escape and alias analysis |
629 | ||
43d861a5 | 630 | fipa-matrix-reorg |
6ae4be32 | 631 | Common Report Var(flag_ipa_matrix_reorg) Optimization |
43d861a5 RL |
632 | Perform matrix layout flattening and transposing based |
633 | on profiling information. | |
634 | ||
e1dc98b2 OG |
635 | fipa-struct-reorg |
636 | Common Report Var(flag_ipa_struct_reorg) | |
637 | Perform structure layout optimizations based | |
638 | on profiling information. | |
639 | ||
8b11a64c | 640 | fivopts |
c662432e | 641 | Common Report Var(flag_ivopts) Init(1) Optimization |
8b11a64c ZD |
642 | Optimize induction variables on trees |
643 | ||
82c0180d | 644 | fjump-tables |
c662432e | 645 | Common Var(flag_jump_tables) Init(1) Optimization |
82c0180d JM |
646 | Use jump tables for sufficiently large switch statements |
647 | ||
de32c0cb | 648 | fkeep-inline-functions |
50431bc4 | 649 | Common Report Var(flag_keep_inline_functions) |
f3fdaec4 | 650 | Generate code for functions even if they are fully inlined |
de32c0cb NB |
651 | |
652 | fkeep-static-consts | |
50431bc4 | 653 | Common Report Var(flag_keep_static_consts) Init(1) |
f3fdaec4 | 654 | Emit static const variables even if they are not used |
de32c0cb | 655 | |
6ff3a151 | 656 | fleading-underscore |
50431bc4 | 657 | Common Report Var(flag_leading_underscore) Init(-1) |
f3fdaec4 | 658 | Give external symbols a leading underscore |
6ff3a151 | 659 | |
efa1cdf0 ZD |
660 | floop-optimize |
661 | Common | |
c0220ea4 | 662 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 663 | |
6ff3a151 | 664 | fmath-errno |
50431bc4 | 665 | Common Report Var(flag_errno_math) Init(1) |
f3fdaec4 | 666 | Set errno after built-in math functions |
6ff3a151 NB |
667 | |
668 | fmem-report | |
50431bc4 | 669 | Common Report Var(mem_report) |
f3fdaec4 | 670 | Report on permanent memory allocation |
6ff3a151 | 671 | |
31b66477 KC |
672 | ; This will attempt to merge constant section constants, if 1 only |
673 | ; string constants and constants from constant pool, if 2 also constant | |
674 | ; variables. | |
6ff3a151 | 675 | fmerge-all-constants |
c662432e | 676 | Common Report Var(flag_merge_constants,2) Init(1) Optimization |
f3fdaec4 | 677 | Attempt to merge identical constants and constant variables |
6ff3a151 NB |
678 | |
679 | fmerge-constants | |
c662432e | 680 | Common Report Var(flag_merge_constants,1) VarExists Optimization |
f3fdaec4 | 681 | Attempt to merge identical constants across compilation units |
6ff3a151 | 682 | |
28a08168 ILT |
683 | fmerge-debug-strings |
684 | Common Report Var(flag_merge_debug_strings) Init(1) | |
685 | Attempt to merge identical debug strings across compilation units | |
686 | ||
de32c0cb NB |
687 | fmessage-length= |
688 | Common RejectNegative Joined UInteger | |
cf03fd63 | 689 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping |
de32c0cb | 690 | |
e5626198 | 691 | fmodulo-sched |
c662432e | 692 | Common Report Var(flag_modulo_sched) Optimization |
e5626198 AZ |
693 | Perform SMS based modulo scheduling before the first scheduling pass |
694 | ||
517d76fa VY |
695 | fmodulo-sched-allow-regmoves |
696 | Common Report Var(flag_modulo_sched_allow_regmoves) | |
697 | Perform SMS based modulo scheduling with register moves allowed | |
698 | ||
5e962776 | 699 | fmove-loop-invariants |
c662432e | 700 | Common Report Var(flag_move_loop_invariants) Init(1) Optimization |
5e962776 ZD |
701 | Move loop invariant computations out of loops |
702 | ||
6de9cd9a | 703 | fmudflap |
50431bc4 | 704 | Common RejectNegative Report Var(flag_mudflap) |
c85ce869 | 705 | Add mudflap bounds-checking instrumentation for single-threaded program |
6de9cd9a DN |
706 | |
707 | fmudflapth | |
110c4563 | 708 | Common RejectNegative Report VarExists Var(flag_mudflap,2) |
c85ce869 | 709 | Add mudflap bounds-checking instrumentation for multi-threaded program |
6de9cd9a DN |
710 | |
711 | fmudflapir | |
50431bc4 | 712 | Common RejectNegative Report Var(flag_mudflap_ignore_reads) |
c85ce869 | 713 | Ignore read operations when inserting mudflap instrumentation |
6de9cd9a | 714 | |
6fb5fa3c | 715 | fdce |
6ae4be32 | 716 | Common Var(flag_dce) Init(1) Optimization |
6fb5fa3c DB |
717 | Use the RTL dead code elimination pass |
718 | ||
719 | fdse | |
6ae4be32 | 720 | Common Var(flag_dse) Init(1) Optimization |
6fb5fa3c DB |
721 | Use the RTL dead store elimination pass |
722 | ||
d72372e4 | 723 | freschedule-modulo-scheduled-loops |
c662432e | 724 | Common Report Var(flag_resched_modulo_sched) Optimization |
d72372e4 MH |
725 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling |
726 | ||
6ff3a151 | 727 | fnon-call-exceptions |
c662432e | 728 | Common Report Var(flag_non_call_exceptions) Optimization |
f3fdaec4 | 729 | Support synchronous non-call exceptions |
6ff3a151 | 730 | |
de32c0cb | 731 | fomit-frame-pointer |
c662432e | 732 | Common Report Var(flag_omit_frame_pointer) Optimization |
f3fdaec4 | 733 | When possible do not generate stack frames |
de32c0cb | 734 | |
917948d3 ZD |
735 | fopenmp-ssa |
736 | Common Report Var(flag_openmp_ssa) | |
737 | Expand OpenMP operations on SSA form | |
738 | ||
6ff3a151 | 739 | foptimize-register-move |
c662432e | 740 | Common Report Var(flag_regmove) Optimization |
f3fdaec4 | 741 | Do the full register move optimization pass |
6ff3a151 | 742 | |
de32c0cb | 743 | foptimize-sibling-calls |
c662432e | 744 | Common Report Var(flag_optimize_sibling_calls) Optimization |
f3fdaec4 | 745 | Optimize sibling and tail recursive calls |
de32c0cb | 746 | |
a5573239 JH |
747 | fpre-ipa-mem-report |
748 | Common Report Var(pre_ipa_mem_report) | |
749 | Report on memory allocation before interprocedural optimization | |
750 | ||
751 | fpost-ipa-mem-report | |
752 | Common Report Var(post_ipa_mem_report) | |
753 | Report on memory allocation before interprocedural optimization | |
754 | ||
6ff3a151 | 755 | fpack-struct |
c662432e | 756 | Common Report Var(flag_pack_struct) Optimization |
f3fdaec4 | 757 | Pack structure members together without holes |
6ff3a151 | 758 | |
467cecf3 | 759 | fpack-struct= |
c662432e | 760 | Common RejectNegative Joined UInteger Optimization |
467cecf3 JB |
761 | -fpack-struct=<number> Set initial maximum structure member alignment |
762 | ||
de32c0cb | 763 | fpcc-struct-return |
50431bc4 | 764 | Common Report Var(flag_pcc_struct_return,1) VarExists |
f3fdaec4 | 765 | Return small aggregates in memory, not registers |
de32c0cb NB |
766 | |
767 | fpeel-loops | |
c662432e | 768 | Common Report Var(flag_peel_loops) Optimization |
f3fdaec4 | 769 | Perform loop peeling |
de32c0cb NB |
770 | |
771 | fpeephole | |
c662432e | 772 | Common Report Var(flag_no_peephole,0) Optimization |
f3fdaec4 | 773 | Enable machine specific peephole optimizations |
de32c0cb | 774 | |
6ff3a151 | 775 | fpeephole2 |
c662432e | 776 | Common Report Var(flag_peephole2) Optimization |
f3fdaec4 | 777 | Enable an RTL peephole pass before sched2 |
6ff3a151 | 778 | |
31b66477 KC |
779 | fPIC |
780 | Common Report Var(flag_pic,2) | |
781 | Generate position-independent code if possible (large mode) | |
782 | ||
783 | fPIE | |
784 | Common Report Var(flag_pie,2) | |
785 | Generate position-independent code for executables if possible (large mode) | |
786 | ||
6ff3a151 | 787 | fpic |
50431bc4 | 788 | Common Report Var(flag_pic,1) VarExists |
31b66477 | 789 | Generate position-independent code if possible (small mode) |
6ff3a151 NB |
790 | |
791 | fpie | |
50431bc4 | 792 | Common Report Var(flag_pie,1) VarExists |
31b66477 | 793 | Generate position-independent code for executables if possible (small mode) |
6ff3a151 | 794 | |
bbc8a8dc | 795 | fpredictive-commoning |
6ae4be32 | 796 | Common Report Var(flag_predictive_commoning) Optimization |
bbc8a8dc ZD |
797 | Run predictive commoning optimization. |
798 | ||
de32c0cb | 799 | fprefetch-loop-arrays |
c662432e | 800 | Common Report Var(flag_prefetch_loop_arrays) Optimization |
f3fdaec4 | 801 | Generate prefetch instructions, if available, for arrays in loops |
de32c0cb | 802 | |
6ff3a151 | 803 | fprofile |
50431bc4 | 804 | Common Report Var(profile_flag) |
f3fdaec4 | 805 | Enable basic program profiling code |
6ff3a151 NB |
806 | |
807 | fprofile-arcs | |
50431bc4 | 808 | Common Report Var(profile_arc_flag) |
f3fdaec4 | 809 | Insert arc-based program profiling code |
6ff3a151 | 810 | |
2f908293 SP |
811 | fprofile-dir= |
812 | Common Joined RejectNegative | |
813 | Set the top-level directory for storing the profile data. | |
814 | The default is 'pwd'. | |
815 | ||
a8a5f53a JH |
816 | fprofile-generate |
817 | Common | |
818 | Enable common options for generating profile info for profile feedback directed optimizations | |
819 | ||
2f908293 SP |
820 | fprofile-generate= |
821 | Common Joined RejectNegative | |
822 | Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir= | |
823 | ||
a8a5f53a | 824 | fprofile-use |
2f908293 | 825 | Common Var(flag_profile_use) |
a8a5f53a JH |
826 | Enable common options for performing profile feedback directed optimizations |
827 | ||
2f908293 SP |
828 | fprofile-use= |
829 | Common Joined RejectNegative | |
830 | Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir= | |
831 | ||
fca9dc00 | 832 | fprofile-values |
50431bc4 | 833 | Common Report Var(flag_profile_values) |
fca9dc00 ZD |
834 | Insert code to profile values of expressions |
835 | ||
de32c0cb NB |
836 | frandom-seed |
837 | Common | |
838 | ||
839 | frandom-seed= | |
840 | Common Joined RejectNegative | |
cf03fd63 | 841 | -frandom-seed=<string> Make compile reproducible using <string> |
de32c0cb | 842 | |
e0d9d0dd NC |
843 | ; This switch causes the command line that was used to create an |
844 | ; object file to be recorded into the object file. The exact format | |
845 | ; of this recording is target and binary file format dependent. | |
846 | ; It is related to the -fverbose-asm switch, but that switch only | |
847 | ; records information in the assembler output file as comments, so | |
848 | ; they never reach the object file. | |
849 | frecord-gcc-switches | |
850 | Common Report Var(flag_record_gcc_switches) | |
851 | Record gcc command line switches in the object file. | |
852 | ||
de32c0cb | 853 | freg-struct-return |
c662432e | 854 | Common Report Var(flag_pcc_struct_return,0) VarExists Optimization |
f3fdaec4 | 855 | Return small aggregates in registers |
de32c0cb | 856 | |
6ff3a151 | 857 | fregmove |
c662432e | 858 | Common Report Var(flag_regmove) Optimization |
f3fdaec4 | 859 | Enables a register move optimization |
6ff3a151 NB |
860 | |
861 | frename-registers | |
c662432e | 862 | Common Report Var(flag_rename_registers) Init(2) Optimization |
f3fdaec4 | 863 | Perform a register renaming optimization pass |
6ff3a151 NB |
864 | |
865 | freorder-blocks | |
c662432e | 866 | Common Report Var(flag_reorder_blocks) Optimization |
f3fdaec4 | 867 | Reorder basic blocks to improve code placement |
6ff3a151 | 868 | |
750054a2 | 869 | freorder-blocks-and-partition |
c662432e | 870 | Common Report Var(flag_reorder_blocks_and_partition) Optimization |
750054a2 CT |
871 | Reorder basic blocks and partition into hot and cold sections |
872 | ||
6ff3a151 | 873 | freorder-functions |
c662432e | 874 | Common Report Var(flag_reorder_functions) Optimization |
f3fdaec4 | 875 | Reorder functions to improve code placement |
6ff3a151 | 876 | |
de32c0cb | 877 | frerun-cse-after-loop |
c662432e | 878 | Common Report Var(flag_rerun_cse_after_loop) Init(2) Optimization |
f3fdaec4 | 879 | Add a common subexpression elimination pass after loop optimizations |
de32c0cb | 880 | |
efa1cdf0 ZD |
881 | frerun-loop-opt |
882 | Common | |
c0220ea4 | 883 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 884 | |
039c3d42 | 885 | frounding-math |
c662432e | 886 | Common Report Var(flag_rounding_math) Optimization |
039c3d42 RS |
887 | Disable optimizations that assume default FP rounding behavior |
888 | ||
6ff3a151 | 889 | fsched-interblock |
c662432e | 890 | Common Report Var(flag_schedule_interblock) Init(1) Optimization |
f3fdaec4 | 891 | Enable scheduling across basic blocks |
6ff3a151 NB |
892 | |
893 | fsched-spec | |
c662432e | 894 | Common Report Var(flag_schedule_speculative) Init(1) Optimization |
f3fdaec4 | 895 | Allow speculative motion of non-loads |
6ff3a151 NB |
896 | |
897 | fsched-spec-load | |
c662432e | 898 | Common Report Var(flag_schedule_speculative_load) Optimization |
f3fdaec4 | 899 | Allow speculative motion of some loads |
6ff3a151 NB |
900 | |
901 | fsched-spec-load-dangerous | |
c662432e | 902 | Common Report Var(flag_schedule_speculative_load_dangerous) Optimization |
f3fdaec4 | 903 | Allow speculative motion of more loads |
6ff3a151 | 904 | |
de32c0cb NB |
905 | fsched-verbose= |
906 | Common RejectNegative Joined | |
cf03fd63 | 907 | -fsched-verbose=<number> Set the verbosity level of the scheduler |
de32c0cb | 908 | |
6ff3a151 | 909 | fsched2-use-superblocks |
c662432e | 910 | Common Report Var(flag_sched2_use_superblocks) Optimization |
f3fdaec4 | 911 | If scheduling post reload, do superblock scheduling |
6ff3a151 NB |
912 | |
913 | fsched2-use-traces | |
c662432e | 914 | Common Report Var(flag_sched2_use_traces) Optimization |
f3fdaec4 | 915 | If scheduling post reload, do trace scheduling |
6ff3a151 | 916 | |
de32c0cb | 917 | fschedule-insns |
c662432e | 918 | Common Report Var(flag_schedule_insns) Optimization |
f3fdaec4 | 919 | Reschedule instructions before register allocation |
de32c0cb NB |
920 | |
921 | fschedule-insns2 | |
c662432e | 922 | Common Report Var(flag_schedule_insns_after_reload) Optimization |
f3fdaec4 | 923 | Reschedule instructions after register allocation |
de32c0cb | 924 | |
31b66477 KC |
925 | ; sched_stalled_insns means that insns can be moved prematurely from the queue |
926 | ; of stalled insns into the ready list. | |
569fa502 | 927 | fsched-stalled-insns |
c662432e | 928 | Common Report Var(flag_sched_stalled_insns) Optimization |
569fa502 DN |
929 | Allow premature scheduling of queued insns |
930 | ||
931 | fsched-stalled-insns= | |
c22cacf3 | 932 | Common RejectNegative Joined UInteger |
4e994432 | 933 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled |
569fa502 | 934 | |
31b66477 KC |
935 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will |
936 | ; be examined for a dependency on a stalled insn that is candidate for | |
937 | ; premature removal from the queue of stalled insns into the ready list (has | |
938 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
569fa502 | 939 | fsched-stalled-insns-dep |
c662432e | 940 | Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization |
569fa502 DN |
941 | Set dependence distance checking in premature scheduling of queued insns |
942 | ||
943 | fsched-stalled-insns-dep= | |
944 | Common RejectNegative Joined UInteger | |
4e994432 | 945 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns |
569fa502 | 946 | |
aacd3885 | 947 | fsection-anchors |
c662432e | 948 | Common Report Var(flag_section_anchors) Optimization |
aacd3885 RS |
949 | Access data in the same section from shared anchor points |
950 | ||
38109dab | 951 | frtl-abstract-sequences |
c662432e | 952 | Common Report Var(flag_rtl_seqabstr) Optimization |
38109dab GL |
953 | Perform sequence abstraction optimization on RTL |
954 | ||
8cd37d0b RL |
955 | fsee |
956 | Common Report Var(flag_see) Init(0) | |
957 | Eliminate redundant sign extensions using LCM. | |
958 | ||
8abb6b22 | 959 | fshow-column |
f6230c17 TT |
960 | Common C ObjC C++ ObjC++ Report Var(flag_show_column) Init(0) |
961 | Show column numbers in diagnostics, when available. Default off | |
8abb6b22 | 962 | |
6ff3a151 | 963 | fsignaling-nans |
c662432e | 964 | Common Report Var(flag_signaling_nans) Optimization |
f3fdaec4 | 965 | Disable optimizations observable by IEEE signaling NaNs |
6ff3a151 | 966 | |
db02da79 | 967 | fsigned-zeros |
21af5cdf | 968 | Common Report Var(flag_signed_zeros) Init(1) Optimization |
db02da79 RS |
969 | Disable floating point optimizations that ignore the IEEE signedness of zero |
970 | ||
6ff3a151 | 971 | fsingle-precision-constant |
c662432e | 972 | Common Report Var(flag_single_precision_constant) Optimization |
f3fdaec4 | 973 | Convert floating point constants to single precision constants |
6ff3a151 | 974 | |
113d659a | 975 | fsplit-ivs-in-unroller |
c662432e | 976 | Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization |
c85ce869 | 977 | Split lifetimes of induction variables when loops are unrolled |
113d659a | 978 | |
e53a16e7 | 979 | fsplit-wide-types |
21af5cdf | 980 | Common Report Var(flag_split_wide_types) Optimization |
e53a16e7 ILT |
981 | Split wide types into independent registers |
982 | ||
f37a4f14 | 983 | fvariable-expansion-in-unroller |
c662432e | 984 | Common Report Var(flag_variable_expansion_in_unroller) Optimization |
c85ce869 | 985 | Apply variable expansion when loops are unrolled |
f37a4f14 | 986 | |
31b66477 KC |
987 | ; Emit code to probe the stack, to help detect stack overflow; also |
988 | ; may cause large objects to be allocated dynamically. | |
6ff3a151 | 989 | fstack-check |
50431bc4 | 990 | Common Report Var(flag_stack_check) |
f3fdaec4 | 991 | Insert stack checking code into the program |
6ff3a151 | 992 | |
de32c0cb NB |
993 | fstack-limit |
994 | Common | |
995 | ||
058de654 NB |
996 | fstack-limit-register= |
997 | Common RejectNegative Joined | |
cf03fd63 | 998 | -fstack-limit-register=<register> Trap if the stack goes past <register> |
058de654 NB |
999 | |
1000 | fstack-limit-symbol= | |
1001 | Common RejectNegative Joined | |
cf03fd63 | 1002 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name> |
058de654 | 1003 | |
7d69de61 RH |
1004 | fstack-protector |
1005 | Common Report Var(flag_stack_protect, 1) | |
1006 | Use propolice as a stack protection method | |
1007 | ||
1008 | fstack-protector-all | |
1009 | Common Report RejectNegative Var(flag_stack_protect, 2) VarExists | |
1010 | Use a stack protection method for every function | |
1011 | ||
de32c0cb | 1012 | fstrength-reduce |
efa1cdf0 | 1013 | Common |
c0220ea4 | 1014 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1015 | |
31b66477 KC |
1016 | ; Nonzero if we should do (language-dependent) alias analysis. |
1017 | ; Typically, this analysis will assume that expressions of certain | |
1018 | ; types do not alias expressions of certain other types. Only used | |
1019 | ; if alias analysis (in general) is enabled. | |
6ff3a151 | 1020 | fstrict-aliasing |
c662432e | 1021 | Common Report Var(flag_strict_aliasing) Optimization |
f3fdaec4 | 1022 | Assume strict aliasing rules apply |
6ff3a151 | 1023 | |
eeef0e45 ILT |
1024 | fstrict-overflow |
1025 | Common Report Var(flag_strict_overflow) | |
1026 | Treat signed overflow as undefined | |
1027 | ||
de32c0cb | 1028 | fsyntax-only |
50431bc4 | 1029 | Common Report Var(flag_syntax_only) |
f3fdaec4 | 1030 | Check for syntax errors, then stop |
de32c0cb | 1031 | |
6ff3a151 | 1032 | ftest-coverage |
50431bc4 | 1033 | Common Report Var(flag_test_coverage) |
f3fdaec4 | 1034 | Create data files needed by \"gcov\" |
6ff3a151 | 1035 | |
de32c0cb | 1036 | fthread-jumps |
c662432e | 1037 | Common Report Var(flag_thread_jumps) Optimization |
f3fdaec4 | 1038 | Perform jump threading optimizations |
de32c0cb | 1039 | |
6ff3a151 | 1040 | ftime-report |
50431bc4 | 1041 | Common Report Var(time_report) |
f3fdaec4 | 1042 | Report the time taken by each compiler pass |
6ff3a151 | 1043 | |
058de654 NB |
1044 | ftls-model= |
1045 | Common Joined RejectNegative | |
cf03fd63 | 1046 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model |
058de654 | 1047 | |
474eccc6 | 1048 | ftoplevel-reorder |
c662432e | 1049 | Common Report Var(flag_toplevel_reorder) Init(1) Optimization |
474eccc6 ILT |
1050 | Reorder top level functions, variables, and asms |
1051 | ||
de32c0cb | 1052 | ftracer |
50431bc4 | 1053 | Common Report Var(flag_tracer) |
f3fdaec4 | 1054 | Perform superblock formation via tail duplication |
de32c0cb | 1055 | |
31b66477 KC |
1056 | ; Zero means that floating-point math operations cannot generate a |
1057 | ; (user-visible) trap. This is the case, for example, in nonstop | |
1058 | ; IEEE 754 arithmetic. | |
6ff3a151 | 1059 | ftrapping-math |
c662432e | 1060 | Common Report Var(flag_trapping_math) Init(1) Optimization |
f3fdaec4 | 1061 | Assume floating-point operations can trap |
6ff3a151 NB |
1062 | |
1063 | ftrapv | |
c662432e | 1064 | Common Report Var(flag_trapv) Optimization |
f3fdaec4 | 1065 | Trap for signed overflow in addition, subtraction and multiplication |
6ff3a151 | 1066 | |
6de9cd9a | 1067 | ftree-ccp |
c662432e | 1068 | Common Report Var(flag_tree_ccp) Optimization |
6de9cd9a DN |
1069 | Enable SSA-CCP optimization on trees |
1070 | ||
0bca51f0 | 1071 | ftree-store-ccp |
c662432e | 1072 | Common Report Var(flag_tree_store_ccp) Optimization |
0bca51f0 DN |
1073 | Enable SSA-CCP optimization for stores and loads |
1074 | ||
6de9cd9a | 1075 | ftree-ch |
c662432e | 1076 | Common Report Var(flag_tree_ch) Optimization |
6de9cd9a DN |
1077 | Enable loop header copying on trees |
1078 | ||
6de9cd9a | 1079 | ftree-copyrename |
c662432e | 1080 | Common Report Var(flag_tree_copyrename) Optimization |
c85ce869 | 1081 | Replace SSA temporaries with better names in copies |
6de9cd9a | 1082 | |
0bca51f0 | 1083 | ftree-copy-prop |
c662432e | 1084 | Common Report Var(flag_tree_copy_prop) Optimization |
0bca51f0 DN |
1085 | Enable copy propagation on trees |
1086 | ||
1087 | ftree-store-copy-prop | |
324d2217 | 1088 | Common |
e9033855 | 1089 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 1090 | |
a5828d1e MM |
1091 | ftree-cselim |
1092 | Common Report Var(flag_tree_cselim) Init(2) Optimization | |
1093 | Transform condition stores into unconditional ones | |
1094 | ||
6de9cd9a | 1095 | ftree-dce |
c662432e | 1096 | Common Report Var(flag_tree_dce) Optimization |
6de9cd9a DN |
1097 | Enable SSA dead code elimination optimization on trees |
1098 | ||
1099 | ftree-dominator-opts | |
c662432e | 1100 | Common Report Var(flag_tree_dom) Optimization |
6de9cd9a DN |
1101 | Enable dominator optimizations |
1102 | ||
1103 | ftree-dse | |
c662432e | 1104 | Common Report Var(flag_tree_dse) Optimization |
6de9cd9a DN |
1105 | Enable dead store elimination |
1106 | ||
ff2ad0f7 | 1107 | ftree-fre |
c662432e | 1108 | Common Report Var(flag_tree_fre) Optimization |
ff2ad0f7 DN |
1109 | Enable Full Redundancy Elimination (FRE) on trees |
1110 | ||
dea61d92 | 1111 | ftree-loop-distribution |
53ed2f0e | 1112 | Common Report Var(flag_tree_loop_distribution) Optimization |
dea61d92 SP |
1113 | Enable loop distribution on trees |
1114 | ||
1b08d87d | 1115 | ftree-loop-im |
c662432e | 1116 | Common Report Var(flag_tree_loop_im) Init(1) Optimization |
a7e5372d ZD |
1117 | Enable loop invariant motion on trees |
1118 | ||
599eabdb | 1119 | ftree-loop-linear |
c662432e | 1120 | Common Report Var(flag_tree_loop_linear) Optimization |
599eabdb DB |
1121 | Enable linear loop transforms on trees |
1122 | ||
1b08d87d | 1123 | ftree-loop-ivcanon |
c662432e | 1124 | Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization |
1b08d87d DB |
1125 | Create canonical induction variables in loops |
1126 | ||
c66b6c66 | 1127 | ftree-loop-optimize |
c662432e | 1128 | Common Report Var(flag_tree_loop_optimize) Init(1) Optimization |
c66b6c66 ZD |
1129 | Enable loop optimizations on tree level |
1130 | ||
5f40b3cb ZD |
1131 | ftree-parallelize-loops= |
1132 | Common Report Joined UInteger Var(flag_tree_parallelize_loops) Init(1) | |
1133 | Enable automatic parallelization of loops | |
1134 | ||
6de9cd9a | 1135 | ftree-pre |
c662432e | 1136 | Common Report Var(flag_tree_pre) Optimization |
6de9cd9a DN |
1137 | Enable SSA-PRE optimization on trees |
1138 | ||
13c59415 UB |
1139 | ftree-reassoc |
1140 | Common Report Var(flag_tree_reassoc) Init(1) Optimization | |
1141 | Enable reassociation on tree level | |
1142 | ||
c75ab022 | 1143 | ftree-salias |
c662432e | 1144 | Common Report Var(flag_tree_salias) Optimization |
c75ab022 DB |
1145 | Perform structural alias analysis |
1146 | ||
fa555252 | 1147 | ftree-sink |
c662432e | 1148 | Common Report Var(flag_tree_sink) Optimization |
fa555252 DB |
1149 | Enable SSA code sinking on trees |
1150 | ||
6de9cd9a | 1151 | ftree-sra |
c662432e | 1152 | Common Report Var(flag_tree_sra) Optimization |
6de9cd9a DN |
1153 | Perform scalar replacement of aggregates |
1154 | ||
1155 | ftree-ter | |
c662432e | 1156 | Common Report Var(flag_tree_ter) Optimization |
6de9cd9a DN |
1157 | Replace temporary expressions in the SSA->normal pass |
1158 | ||
c662432e NC |
1159 | ftree-lrs |
1160 | Common Report Var(flag_tree_live_range_split) Optimization | |
1161 | Perform live range splitting during the SSA->normal pass | |
1162 | ||
0bca51f0 | 1163 | ftree-vrp |
c662432e | 1164 | Common Report Var(flag_tree_vrp) Init(0) Optimization |
0bca51f0 DN |
1165 | Perform Value Range Propagation on trees |
1166 | ||
de32c0cb | 1167 | funit-at-a-time |
c662432e | 1168 | Common Report Var(flag_unit_at_a_time) Optimization |
f3fdaec4 | 1169 | Compile whole compilation unit at a time |
de32c0cb NB |
1170 | |
1171 | funroll-loops | |
c662432e | 1172 | Common Report Var(flag_unroll_loops) Optimization |
f3fdaec4 | 1173 | Perform loop unrolling when iteration count is known |
de32c0cb NB |
1174 | |
1175 | funroll-all-loops | |
c662432e | 1176 | Common Report Var(flag_unroll_all_loops) Optimization |
f3fdaec4 | 1177 | Perform loop unrolling for all loops |
de32c0cb | 1178 | |
f9cc1a70 PB |
1179 | ; Nonzero means that loop optimizer may assume that the induction variables |
1180 | ; that control loops do not overflow and that the loops with nontrivial | |
1181 | ; exit condition are not infinite | |
1182 | funsafe-loop-optimizations | |
c662432e | 1183 | Common Report Var(flag_unsafe_loop_optimizations) Optimization |
f9cc1a70 PB |
1184 | Allow loop optimizations to assume that the loops behave in normal way |
1185 | ||
a1a82611 RE |
1186 | fassociative-math |
1187 | Common Report Var(flag_associative_math) | |
1188 | Allow optimization for floating-point arithmetic which may change the | |
1189 | result of the operation due to rounding. | |
1190 | ||
1191 | freciprocal-math | |
1192 | Common Report Var(flag_reciprocal_math) | |
1193 | Same as -fassociative-math for expressions which include division. | |
1194 | ||
31b66477 KC |
1195 | ; Nonzero means that unsafe floating-point math optimizations are allowed |
1196 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
1197 | ; are allowed to assume that their arguments and results are "normal" | |
1198 | ; (e.g., nonnegative for SQRT). | |
6ff3a151 | 1199 | funsafe-math-optimizations |
c662432e | 1200 | Common Report Var(flag_unsafe_math_optimizations) Optimization |
f3fdaec4 | 1201 | Allow math optimizations that may violate IEEE or ISO standards |
6ff3a151 | 1202 | |
de32c0cb | 1203 | funswitch-loops |
c662432e | 1204 | Common Report Var(flag_unswitch_loops) Optimization |
f3fdaec4 | 1205 | Perform loop unswitching |
de32c0cb | 1206 | |
6ff3a151 | 1207 | funwind-tables |
c662432e | 1208 | Common Report Var(flag_unwind_tables) Optimization |
f3fdaec4 | 1209 | Just generate unwind tables for exception handling |
6ff3a151 | 1210 | |
014a1138 | 1211 | fvar-tracking |
c662432e | 1212 | Common Report Var(flag_var_tracking) VarExists Optimization |
014a1138 JZ |
1213 | Perform variable tracking |
1214 | ||
62760ffd CT |
1215 | fvar-tracking-uninit |
1216 | Common Report Var(flag_var_tracking_uninit) Optimization | |
1217 | Perform variable tracking and also tag variables that are uninitialized | |
1218 | ||
79fe1b3b | 1219 | ftree-vectorize |
c662432e | 1220 | Common Report Var(flag_tree_vectorize) Optimization |
79fe1b3b DN |
1221 | Enable loop vectorization on trees |
1222 | ||
792ed98b HJ |
1223 | fvect-cost-model |
1224 | Common Report Var(flag_vect_cost_model) Optimization | |
1225 | Enable use of cost model in vectorization | |
1226 | ||
c12cc930 | 1227 | ftree-vect-loop-version |
c662432e | 1228 | Common Report Var(flag_tree_vect_loop_version) Init(1) Optimization |
c12cc930 KB |
1229 | Enable loop versioning when doing loop vectorization on trees |
1230 | ||
c866976a LB |
1231 | ftree-vectorizer-verbose= |
1232 | Common RejectNegative Joined | |
4e994432 | 1233 | -ftree-vectorizer-verbose=<number> Set the verbosity level of the vectorizer |
c866976a | 1234 | |
fbf798fc | 1235 | ftree-scev-cprop |
21af5cdf | 1236 | Common Report Var(flag_tree_scev_cprop) Init(1) Optimization |
fbf798fc DN |
1237 | Enable copy propagation of scalar-evolution information. |
1238 | ||
31b66477 KC |
1239 | ; -fverbose-asm causes extra commentary information to be produced in |
1240 | ; the generated assembly code (to make it more readable). This option | |
1241 | ; is generally only of use to those who actually need to read the | |
1242 | ; generated assembly code (perhaps while debugging the compiler itself). | |
1243 | ; -fno-verbose-asm, the default, causes the extra information | |
1244 | ; to not be added and is useful when comparing two assembler files. | |
6ff3a151 | 1245 | fverbose-asm |
50431bc4 | 1246 | Common Report Var(flag_verbose_asm) |
f3fdaec4 | 1247 | Add extra commentary to assembler output |
6ff3a151 | 1248 | |
d7afec4b ND |
1249 | fvisibility= |
1250 | Common Joined RejectNegative | |
1251 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility | |
1252 | ||
1253 | ||
fca9dc00 | 1254 | fvpt |
c662432e | 1255 | Common Report Var(flag_value_profile_transformations) Optimization |
fca9dc00 ZD |
1256 | Use expression value profiles in optimizations |
1257 | ||
62551c66 | 1258 | fweb |
c662432e | 1259 | Common Report Var(flag_web) Init(2) Optimization |
62551c66 JH |
1260 | Construct webs and split unrelated uses of single variable |
1261 | ||
ce91e74c | 1262 | fwhole-program |
c662432e | 1263 | Common Report Var(flag_whole_program) Init(0) Optimization |
ce91e74c JH |
1264 | Perform whole program optimizations |
1265 | ||
6ff3a151 | 1266 | fwrapv |
c662432e | 1267 | Common Report Var(flag_wrapv) Optimization |
f3fdaec4 | 1268 | Assume signed arithmetic overflow wraps around |
6ff3a151 | 1269 | |
6ff3a151 | 1270 | fzero-initialized-in-bss |
50431bc4 | 1271 | Common Report Var(flag_zero_initialized_in_bss) Init(1) |
f3fdaec4 | 1272 | Put zero initialized data in the bss section |
6ff3a151 | 1273 | |
e01cc6dc NB |
1274 | g |
1275 | Common JoinedOrMissing | |
df38ffef NB |
1276 | Generate debug information in default format |
1277 | ||
1278 | gcoff | |
14c7833c | 1279 | Common JoinedOrMissing Negative(gdwarf-2) |
df38ffef NB |
1280 | Generate debug information in COFF format |
1281 | ||
df38ffef | 1282 | gdwarf-2 |
14c7833c | 1283 | Common JoinedOrMissing Negative(gstabs) |
df38ffef NB |
1284 | Generate debug information in DWARF v2 format |
1285 | ||
1286 | ggdb | |
1287 | Common JoinedOrMissing | |
1288 | Generate debug information in default extended format | |
1289 | ||
1290 | gstabs | |
14c7833c | 1291 | Common JoinedOrMissing Negative(gstabs+) |
df38ffef NB |
1292 | Generate debug information in STABS format |
1293 | ||
1294 | gstabs+ | |
14c7833c | 1295 | Common JoinedOrMissing Negative(gvms) |
df38ffef NB |
1296 | Generate debug information in extended STABS format |
1297 | ||
1298 | gvms | |
14c7833c | 1299 | Common JoinedOrMissing Negative(gxcoff) |
df38ffef NB |
1300 | Generate debug information in VMS format |
1301 | ||
1302 | gxcoff | |
14c7833c | 1303 | Common JoinedOrMissing Negative(gxcoff+) |
df38ffef NB |
1304 | Generate debug information in XCOFF format |
1305 | ||
1306 | gxcoff+ | |
14c7833c | 1307 | Common JoinedOrMissing Negative(gcoff) |
df38ffef | 1308 | Generate debug information in extended XCOFF format |
e01cc6dc | 1309 | |
d185d268 NB |
1310 | o |
1311 | Common Joined Separate | |
cf03fd63 | 1312 | -o <file> Place output into <file> |
d185d268 NB |
1313 | |
1314 | p | |
50431bc4 | 1315 | Common Var(profile_flag) |
cf03fd63 | 1316 | Enable function profiling |
d185d268 NB |
1317 | |
1318 | pedantic | |
50431bc4 | 1319 | Common Var(pedantic) |
cf03fd63 | 1320 | Issue warnings needed for strict compliance to the standard |
d185d268 NB |
1321 | |
1322 | pedantic-errors | |
1323 | Common | |
cf03fd63 | 1324 | Like -pedantic but issue them as errors |
d185d268 | 1325 | |
d7b42618 | 1326 | quiet |
50431bc4 | 1327 | Common Var(quiet_flag) |
cf03fd63 | 1328 | Do not display functions compiled or elapsed time |
d7b42618 | 1329 | |
d185d268 | 1330 | version |
50431bc4 | 1331 | Common Var(version_flag) |
cf03fd63 | 1332 | Display the compiler's version |
d185d268 NB |
1333 | |
1334 | w | |
50431bc4 | 1335 | Common Var(inhibit_warnings) |
cf03fd63 | 1336 | Suppress warnings |
d185d268 | 1337 | |
528dc603 L |
1338 | shared |
1339 | Common RejectNegative Negative(pie) | |
1340 | Create a shared library | |
1341 | ||
1342 | pie | |
1343 | Common RejectNegative Negative(shared) | |
1344 | Create a position independent executable | |
1345 | ||
d7b42618 | 1346 | ; This comment is to ensure we retain the blank line above. |