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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 | |
115 | -Wframe-larger-than=@var{len} Warn whenever a function's stack frame requires | |
116 | more than @var{len} bytes. The computation done to determine | |
117 | the stack frame size is approximate and not conservative. | |
118 | The actual requirements may be somewhat greater than @var{len} | |
119 | even if you do not get a warning. In addition, any space allocated | |
120 | via @code{alloca}, variable-length arrays, or related constructs | |
121 | is not included by the compiler when determining | |
122 | whether or not to issue a warning. | |
123 | ||
e01cc6dc | 124 | Winline |
c662432e | 125 | Common Var(warn_inline) Warning |
28786366 | 126 | Warn when an inlined function cannot be inlined |
e01cc6dc NB |
127 | |
128 | Wlarger-than- | |
c662432e | 129 | Common RejectNegative Joined UInteger Warning |
e8fc888d MLI |
130 | |
131 | Wlarger-than= | |
132 | Common RejectNegative Joined UInteger Warning | |
133 | -Wlarger-than=<number> Warn if an object is larger than <number> bytes | |
e01cc6dc | 134 | |
63a08740 DM |
135 | Wlogical-op |
136 | Common Warning Var(warn_logical_op) | |
137 | Warn when a logical operator is suspicously always evaluating to true or false | |
138 | ||
f9cc1a70 | 139 | Wunsafe-loop-optimizations |
c662432e | 140 | Common Var(warn_unsafe_loop_optimizations) Warning |
f9cc1a70 PB |
141 | Warn if the loop cannot be optimized due to nontrivial assumptions. |
142 | ||
e01cc6dc | 143 | Wmissing-noreturn |
c662432e | 144 | Common Var(warn_missing_noreturn) Warning |
28786366 | 145 | Warn about functions which might be candidates for __attribute__((noreturn)) |
e01cc6dc | 146 | |
7621f5d5 VR |
147 | Wmudflap |
148 | Common Var(warn_mudflap) Init(1) Warning | |
149 | Warn about constructs not instrumented by -fmudflap | |
150 | ||
71834ad3 | 151 | Woverflow |
c662432e | 152 | Common Var(warn_overflow) Init(1) Warning |
71834ad3 RS |
153 | Warn about overflow in arithmetic expressions |
154 | ||
e01cc6dc | 155 | Wpacked |
c662432e | 156 | Common Var(warn_packed) Warning |
28786366 | 157 | Warn when the packed attribute has no effect on struct layout |
e01cc6dc NB |
158 | |
159 | Wpadded | |
c662432e | 160 | Common Var(warn_padded) Warning |
28786366 | 161 | Warn when padding is required to align structure members |
e01cc6dc NB |
162 | |
163 | Wshadow | |
c662432e | 164 | Common Var(warn_shadow) Warning |
28786366 | 165 | Warn when one local variable shadows another |
e01cc6dc | 166 | |
7d69de61 | 167 | Wstack-protector |
c662432e | 168 | Common Var(warn_stack_protect) Warning |
7d69de61 RH |
169 | Warn when not issuing stack smashing protection for some reason |
170 | ||
e01cc6dc | 171 | Wstrict-aliasing |
c662432e | 172 | Common Warning |
28786366 | 173 | Warn about code which might break strict aliasing rules |
e01cc6dc | 174 | |
5399d643 | 175 | Wstrict-aliasing= |
027b740e | 176 | Common Joined UInteger Var(warn_strict_aliasing) Init(-1) Warning |
5399d643 JW |
177 | Warn about code which might break strict aliasing rules |
178 | ||
6ac01510 | 179 | Wstrict-overflow |
21af5cdf | 180 | Common Warning |
6ac01510 ILT |
181 | Warn about optimizations that assume that signed overflow is undefined |
182 | ||
183 | Wstrict-overflow= | |
027b740e | 184 | Common Joined UInteger Var(warn_strict_overflow) Init(-1) Warning |
6ac01510 ILT |
185 | Warn about optimizations that assume that signed overflow is undefined |
186 | ||
e01cc6dc | 187 | Wswitch |
c662432e | 188 | Common Var(warn_switch) Warning |
28786366 | 189 | Warn about enumerated switches, with no default, missing a case |
e01cc6dc NB |
190 | |
191 | Wswitch-default | |
c662432e | 192 | Common Var(warn_switch_default) Warning |
28786366 | 193 | Warn about enumerated switches missing a \"default:\" statement |
e01cc6dc NB |
194 | |
195 | Wswitch-enum | |
c662432e | 196 | Common Var(warn_switch_enum) Warning |
28786366 | 197 | Warn about all enumerated switches missing a specific case |
e01cc6dc NB |
198 | |
199 | Wsystem-headers | |
c662432e | 200 | Common Var(warn_system_headers) Warning |
f3fdaec4 | 201 | Do not suppress warnings from system headers |
e01cc6dc | 202 | |
faebccf9 DN |
203 | Wtype-limits |
204 | Common Var(warn_type_limits) Init(-1) Warning | |
205 | Warn if a comparison is always true or always false due to the limited range of the data type | |
206 | ||
e01cc6dc | 207 | Wuninitialized |
c662432e | 208 | Common Var(warn_uninitialized) Warning |
28786366 | 209 | Warn about uninitialized automatic variables |
e01cc6dc NB |
210 | |
211 | Wunreachable-code | |
c662432e | 212 | Common Var(warn_notreached) Warning |
28786366 | 213 | Warn about code that will never be executed |
e01cc6dc | 214 | |
903caebf | 215 | Wunused |
c662432e | 216 | Common Warning |
cf03fd63 | 217 | Enable all -Wunused- warnings |
903caebf | 218 | |
e01cc6dc | 219 | Wunused-function |
c662432e | 220 | Common Var(warn_unused_function) Warning |
28786366 | 221 | Warn when a function is unused |
e01cc6dc NB |
222 | |
223 | Wunused-label | |
c662432e | 224 | Common Var(warn_unused_label) Warning |
28786366 | 225 | Warn when a label is unused |
e01cc6dc NB |
226 | |
227 | Wunused-parameter | |
c662432e | 228 | Common Var(warn_unused_parameter) Warning |
28786366 | 229 | Warn when a function parameter is unused |
e01cc6dc NB |
230 | |
231 | Wunused-value | |
c662432e | 232 | Common Var(warn_unused_value) Warning |
28786366 | 233 | Warn when an expression value is unused |
e01cc6dc NB |
234 | |
235 | Wunused-variable | |
c662432e | 236 | Common Var(warn_unused_variable) Warning |
28786366 | 237 | Warn when a variable is unused |
e01cc6dc | 238 | |
16c1c158 | 239 | Wcoverage-mismatch |
21af5cdf | 240 | Common RejectNegative Var(warn_coverage_mismatch) Warning |
16c1c158 RG |
241 | Warn instead of error in case profiles in -fprofile-use do not match |
242 | ||
d185d268 NB |
243 | aux-info |
244 | Common Separate | |
cf03fd63 | 245 | -aux-info <file> Emit declaration information into <file> |
d185d268 NB |
246 | |
247 | aux-info= | |
248 | Common Joined | |
249 | ||
250 | auxbase | |
251 | Common Separate | |
252 | ||
253 | auxbase-strip | |
254 | Common Separate | |
255 | ||
256 | d | |
257 | Common Joined | |
cf03fd63 | 258 | -d<letters> Enable dumps from specific passes of the compiler |
d185d268 NB |
259 | |
260 | dumpbase | |
261 | Common Separate | |
cf03fd63 | 262 | -dumpbase <file> Set the file basename to be used for dumps |
d185d268 | 263 | |
31b66477 KC |
264 | ; The version of the C++ ABI in use. The following values are allowed: |
265 | ; | |
266 | ; 0: The version of the ABI believed most conformant with the C++ ABI | |
267 | ; specification. This ABI may change as bugs are discovered and fixed. | |
268 | ; Therefore, 0 will not necessarily indicate the same ABI in different | |
269 | ; versions of G++. | |
270 | ; | |
271 | ; 1: The version of the ABI first used in G++ 3.2. | |
272 | ; | |
99a8d35b ET |
273 | ; 2: The version of the ABI first used in G++ 3.4. |
274 | ; | |
31b66477 KC |
275 | ; Additional positive integers will be assigned as new versions of |
276 | ; the ABI become the default version of the ABI. | |
57782ad8 | 277 | fabi-version= |
50431bc4 | 278 | Common Joined UInteger Var(flag_abi_version) Init(2) |
57782ad8 | 279 | |
6ff3a151 | 280 | falign-functions |
50431bc4 | 281 | Common Report Var(align_functions,0) |
f3fdaec4 | 282 | Align the start of functions |
6ff3a151 | 283 | |
058de654 NB |
284 | falign-functions= |
285 | Common RejectNegative Joined UInteger | |
286 | ||
6ff3a151 | 287 | falign-jumps |
c662432e | 288 | Common Report Var(align_jumps,0) Optimization |
f3fdaec4 | 289 | Align labels which are only reached by jumping |
6ff3a151 | 290 | |
058de654 NB |
291 | falign-jumps= |
292 | Common RejectNegative Joined UInteger | |
293 | ||
6ff3a151 | 294 | falign-labels |
c662432e | 295 | Common Report Var(align_labels,0) Optimization |
f3fdaec4 | 296 | Align all labels |
6ff3a151 | 297 | |
058de654 NB |
298 | falign-labels= |
299 | Common RejectNegative Joined UInteger | |
300 | ||
6ff3a151 | 301 | falign-loops |
c662432e | 302 | Common Report Var(align_loops) Optimization |
f3fdaec4 | 303 | Align the start of loops |
6ff3a151 | 304 | |
058de654 NB |
305 | falign-loops= |
306 | Common RejectNegative Joined UInteger | |
307 | ||
31b66477 KC |
308 | ; This flag is only tested if alias checking is enabled. |
309 | ; 0 if pointer arguments may alias each other. True in C. | |
310 | ; 1 if pointer arguments may not alias each other but may alias | |
311 | ; global variables. | |
312 | ; 2 if pointer arguments may not alias each other and may not | |
0698a1d2 TM |
313 | ; alias global variables. |
314 | ; 3 if pointer arguments may not alias anything. True in Fortran. | |
315 | ; Set by the front end. | |
6ff3a151 | 316 | fargument-alias |
c662432e | 317 | Common Report Var(flag_argument_noalias,0) Optimization |
f3fdaec4 | 318 | Specify that arguments may alias each other and globals |
6ff3a151 NB |
319 | |
320 | fargument-noalias | |
c662432e | 321 | Common Report Var(flag_argument_noalias,1) VarExists Optimization |
f3fdaec4 | 322 | Assume arguments may alias globals but not each other |
6ff3a151 NB |
323 | |
324 | fargument-noalias-global | |
c662432e | 325 | Common Report Var(flag_argument_noalias,2) VarExists Optimization |
f3fdaec4 | 326 | Assume arguments alias neither each other nor globals |
6ff3a151 | 327 | |
0698a1d2 | 328 | fargument-noalias-anything |
c662432e | 329 | Common Report Var(flag_argument_noalias,3) VarExists Optimization |
0698a1d2 TM |
330 | Assume arguments alias no other storage |
331 | ||
6ff3a151 | 332 | fasynchronous-unwind-tables |
c662432e | 333 | Common Report Var(flag_asynchronous_unwind_tables) Optimization |
f3fdaec4 | 334 | Generate unwind tables that are exact at each instruction boundary |
6ff3a151 | 335 | |
6fb5fa3c DB |
336 | fauto-inc-dec |
337 | Common Report Var(flag_auto_inc_dec) Init(1) | |
338 | Generate auto-inc/dec instructions | |
339 | ||
31b66477 KC |
340 | ; -fcheck-bounds causes gcc to generate array bounds checks. |
341 | ; For C, C++ and ObjC: defaults off. | |
342 | ; For Java: defaults to on. | |
343 | ; For Fortran: defaults to off. | |
6ff3a151 | 344 | fbounds-check |
50431bc4 | 345 | Common Report Var(flag_bounds_check) |
f3fdaec4 | 346 | Generate code to check bounds before indexing arrays |
6ff3a151 NB |
347 | |
348 | fbranch-count-reg | |
c662432e | 349 | Common Report Var(flag_branch_on_count_reg) Init(1) Optimization |
f3fdaec4 | 350 | Replace add, compare, branch with branch on count register |
6ff3a151 NB |
351 | |
352 | fbranch-probabilities | |
c662432e | 353 | Common Report Var(flag_branch_probabilities) Optimization |
f3fdaec4 | 354 | Use profiling information for branch probabilities |
6ff3a151 | 355 | |
de32c0cb | 356 | fbranch-target-load-optimize |
c662432e | 357 | Common Report Var(flag_branch_target_load_optimize) Optimization |
f3fdaec4 | 358 | Perform branch target load optimization before prologue / epilogue threading |
de32c0cb NB |
359 | |
360 | fbranch-target-load-optimize2 | |
c662432e | 361 | Common Report Var(flag_branch_target_load_optimize2) Optimization |
f3fdaec4 | 362 | Perform branch target load optimization after prologue / epilogue threading |
de32c0cb | 363 | |
1194fc79 | 364 | fbtr-bb-exclusive |
c662432e | 365 | Common Report Var(flag_btr_bb_exclusive) Optimization |
1194fc79 R |
366 | Restrict target load migration not to re-use registers in any basic block |
367 | ||
058de654 NB |
368 | fcall-saved- |
369 | Common Joined RejectNegative | |
cf03fd63 | 370 | -fcall-saved-<register> Mark <register> as being preserved across functions |
058de654 NB |
371 | |
372 | fcall-used- | |
373 | Common Joined RejectNegative | |
cf03fd63 | 374 | -fcall-used-<register> Mark <register> as being corrupted by function calls |
058de654 | 375 | |
31b66477 KC |
376 | ; Nonzero for -fcaller-saves: allocate values in regs that need to |
377 | ; be saved across function calls, if that produces overall better code. | |
378 | ; Optional now, so people can test it. | |
de32c0cb | 379 | fcaller-saves |
c662432e | 380 | Common Report Var(flag_caller_saves) Optimization |
f3fdaec4 | 381 | Save registers around function calls |
de32c0cb | 382 | |
3d8864c0 SP |
383 | fcheck-data-deps |
384 | Common Report Var(flag_check_data_deps) | |
385 | Compare the results of several data dependence analyzers. | |
386 | ||
6ff3a151 | 387 | fcommon |
c662432e | 388 | Common Report Var(flag_no_common,0) Optimization |
f3fdaec4 | 389 | Do not put uninitialized globals in the common section |
6ff3a151 NB |
390 | |
391 | fcprop-registers | |
c662432e | 392 | Common Report Var(flag_cprop_registers) Optimization |
f3fdaec4 | 393 | Perform a register copy-propagation optimization pass |
6ff3a151 | 394 | |
de32c0cb | 395 | fcrossjumping |
c662432e | 396 | Common Report Var(flag_crossjumping) Optimization |
f3fdaec4 | 397 | Perform cross-jumping optimization |
de32c0cb NB |
398 | |
399 | fcse-follow-jumps | |
c662432e | 400 | Common Report Var(flag_cse_follow_jumps) Optimization |
f3fdaec4 | 401 | When running CSE, follow jumps to their targets |
de32c0cb NB |
402 | |
403 | fcse-skip-blocks | |
c662432e | 404 | Common Report Var(flag_cse_skip_blocks) Optimization |
f3fdaec4 | 405 | When running CSE, follow conditional jumps |
de32c0cb | 406 | |
c7463669 | 407 | fcx-limited-range |
c662432e | 408 | Common Report Var(flag_cx_limited_range) Optimization |
c7463669 RH |
409 | Omit range reduction step when performing complex division |
410 | ||
35085f76 JB |
411 | fcx-fortran-rules |
412 | Common Report Var(flag_cx_fortran_rules) Optimization | |
413 | Complex multiplication and division follow Fortran rules | |
414 | ||
6ff3a151 | 415 | fdata-sections |
c662432e | 416 | Common Report Var(flag_data_sections) Optimization |
f3fdaec4 | 417 | Place data items into their own section |
6ff3a151 | 418 | |
0a090f42 SP |
419 | fdbg-cnt-list |
420 | Common Report | |
421 | List all available debugging counters with their limits and counts. | |
422 | ||
6fb5fa3c DB |
423 | fdbg-cnt= |
424 | Common RejectNegative Joined | |
0a090f42 | 425 | -fdbg-cnt=<counter>:<limit>[,<counter>:<limit>,...] Set the debug counter limit. |
6fb5fa3c | 426 | |
c8aea42c PB |
427 | fdebug-prefix-map= |
428 | Common Joined RejectNegative | |
429 | Map one directory name to another in debug information | |
430 | ||
31b66477 KC |
431 | ; Nonzero for -fdefer-pop: don't pop args after each function call |
432 | ; instead save them up to pop many calls' args with one insns. | |
de32c0cb | 433 | fdefer-pop |
c662432e | 434 | Common Report Var(flag_defer_pop) Optimization |
f3fdaec4 | 435 | Defer popping functions args from stack until later |
de32c0cb NB |
436 | |
437 | fdelayed-branch | |
c662432e | 438 | Common Report Var(flag_delayed_branch) Optimization |
f3fdaec4 | 439 | Attempt to fill delay slots of branch instructions |
de32c0cb NB |
440 | |
441 | fdelete-null-pointer-checks | |
c662432e | 442 | Common Report Var(flag_delete_null_pointer_checks) Optimization |
f3fdaec4 | 443 | Delete useless null pointer checks |
de32c0cb NB |
444 | |
445 | fdiagnostics-show-location= | |
446 | Common Joined RejectNegative | |
cf03fd63 | 447 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics |
de32c0cb | 448 | |
ccf08a6e | 449 | fdiagnostics-show-option |
2098fe9e | 450 | Common |
c85ce869 | 451 | Amend appropriate diagnostic messages with the command line option that controls them |
ccf08a6e | 452 | |
6de9cd9a DN |
453 | fdump- |
454 | Common Joined RejectNegative | |
455 | -fdump-<type> Dump various compiler internals to a file | |
456 | ||
24a7799e R |
457 | fdump-noaddr |
458 | Common Report Var(flag_dump_noaddr) | |
459 | Suppress output of addresses in debugging dumps | |
460 | ||
6ff3a151 | 461 | fdump-unnumbered |
50431bc4 | 462 | Common Report Var(flag_dump_unnumbered) VarExists |
24a7799e | 463 | Suppress output of instruction numbers, line number notes and addresses in debugging dumps |
6ff3a151 | 464 | |
355866de | 465 | fearly-inlining |
c662432e | 466 | Common Report Var(flag_early_inlining) Init(1) Optimization |
355866de RG |
467 | Perform early inlining |
468 | ||
de32c0cb | 469 | feliminate-dwarf2-dups |
50431bc4 | 470 | Common Report Var(flag_eliminate_dwarf2_dups) |
f3fdaec4 | 471 | Perform DWARF2 duplicate elimination |
de32c0cb | 472 | |
6a08f7b3 | 473 | feliminate-unused-debug-symbols |
50431bc4 | 474 | Common Report Var(flag_debug_only_used_symbols) |
f3fdaec4 | 475 | Perform unused type elimination in debug info |
6a08f7b3 | 476 | |
de32c0cb | 477 | feliminate-unused-debug-types |
50431bc4 | 478 | Common Report Var(flag_eliminate_unused_debug_types) Init(1) |
f3fdaec4 | 479 | Perform unused type elimination in debug info |
de32c0cb | 480 | |
e713adf6 | 481 | femit-class-debug-always |
eae8e474 | 482 | Common Report Var(flag_emit_class_debug_always) Init(0) |
e713adf6 CD |
483 | Do not suppress C++ class debug information. |
484 | ||
6ff3a151 | 485 | fexceptions |
c662432e | 486 | Common Report Var(flag_exceptions) Optimization |
f3fdaec4 | 487 | Enable exception handling |
6ff3a151 | 488 | |
de32c0cb | 489 | fexpensive-optimizations |
c662432e | 490 | Common Report Var(flag_expensive_optimizations) Optimization |
f3fdaec4 | 491 | Perform a number of minor, expensive optimizations |
de32c0cb | 492 | |
058de654 NB |
493 | ffast-math |
494 | Common | |
495 | ||
6ff3a151 | 496 | ffinite-math-only |
c662432e | 497 | Common Report Var(flag_finite_math_only) Optimization |
f3fdaec4 | 498 | Assume no NaNs or infinities are generated |
6ff3a151 | 499 | |
058de654 NB |
500 | ffixed- |
501 | Common Joined RejectNegative | |
cf03fd63 | 502 | -ffixed-<register> Mark <register> as being unavailable to the compiler |
058de654 | 503 | |
de32c0cb | 504 | ffloat-store |
c662432e | 505 | Common Report Var(flag_float_store) Optimization |
31b66477 | 506 | Don't allocate floats and doubles in extended-precision registers |
de32c0cb NB |
507 | |
508 | fforce-addr | |
3de5e93a SB |
509 | Common |
510 | Does nothing. Preserved for backward compatibility. | |
de32c0cb | 511 | |
2ca2b607 SB |
512 | fforward-propagate |
513 | Common Report Var(flag_forward_propagate) Optimization | |
a52b023a PB |
514 | Perform a forward propagation pass on RTL |
515 | ||
31b66477 KC |
516 | ; Nonzero means don't put addresses of constant functions in registers. |
517 | ; Used for compiling the Unix kernel, where strange substitutions are | |
518 | ; done on the assembly output. | |
de32c0cb | 519 | ffunction-cse |
50431bc4 | 520 | Common Report Var(flag_no_function_cse,0) |
f3fdaec4 | 521 | Allow function addresses to be held in registers |
de32c0cb | 522 | |
6ff3a151 | 523 | ffunction-sections |
50431bc4 | 524 | Common Report Var(flag_function_sections) |
f3fdaec4 | 525 | Place each function into its own section |
6ff3a151 | 526 | |
de32c0cb | 527 | fgcse |
c662432e | 528 | Common Report Var(flag_gcse) Optimization |
f3fdaec4 | 529 | Perform global common subexpression elimination |
de32c0cb NB |
530 | |
531 | fgcse-lm | |
c662432e | 532 | Common Report Var(flag_gcse_lm) Init(1) Optimization |
f3fdaec4 | 533 | Perform enhanced load motion during global common subexpression elimination |
de32c0cb NB |
534 | |
535 | fgcse-sm | |
c662432e | 536 | Common Report Var(flag_gcse_sm) Init(0) Optimization |
f3fdaec4 | 537 | Perform store motion after global common subexpression elimination |
de32c0cb | 538 | |
f5f2e3cd | 539 | fgcse-las |
c662432e | 540 | Common Report Var(flag_gcse_las) Init(0) Optimization |
f9957958 MH |
541 | Perform redundant load after store elimination in global common subexpression |
542 | elimination | |
543 | ||
544 | fgcse-after-reload | |
c662432e | 545 | Common Report Var(flag_gcse_after_reload) Optimization |
f9957958 | 546 | Perform global common subexpression elimination after register allocation |
c85ce869 | 547 | has finished |
f5f2e3cd | 548 | |
6ff3a151 | 549 | fguess-branch-probability |
c662432e | 550 | Common Report Var(flag_guess_branch_prob) Optimization |
f3fdaec4 | 551 | Enable guessing of branch probabilities |
6ff3a151 | 552 | |
31b66477 KC |
553 | ; Nonzero means ignore `#ident' directives. 0 means handle them. |
554 | ; Generate position-independent code for executables if possible | |
555 | ; On SVR4 targets, it also controls whether or not to emit a | |
556 | ; string identifying the compiler. | |
6ff3a151 | 557 | fident |
50431bc4 | 558 | Common Report Var(flag_no_ident,0) |
f3fdaec4 | 559 | Process #ident directives |
6ff3a151 | 560 | |
de32c0cb | 561 | fif-conversion |
c662432e | 562 | Common Report Var(flag_if_conversion) Optimization |
f3fdaec4 | 563 | Perform conversion of conditional jumps to branchless equivalents |
de32c0cb NB |
564 | |
565 | fif-conversion2 | |
c662432e | 566 | Common Report Var(flag_if_conversion2) Optimization |
f3fdaec4 | 567 | Perform conversion of conditional jumps to conditional execution |
de32c0cb | 568 | |
31b66477 KC |
569 | ; -finhibit-size-directive inhibits output of .size for ELF. |
570 | ; This is used only for compiling crtstuff.c, | |
571 | ; and it may be extended to other effects | |
572 | ; needed for crtstuff.c on other systems. | |
6ff3a151 | 573 | finhibit-size-directive |
50431bc4 | 574 | Common Report Var(flag_inhibit_size_directive) |
f3fdaec4 | 575 | Do not generate .size directives |
6ff3a151 | 576 | |
31b66477 KC |
577 | ; Nonzero means that functions declared `inline' will be treated |
578 | ; as `static'. Prevents generation of zillions of copies of unused | |
579 | ; static inline functions; instead, `inlines' are written out | |
580 | ; only when actually used. Used in conjunction with -g. Also | |
581 | ; does the right thing with #pragma interface. | |
de32c0cb | 582 | finline |
50431bc4 | 583 | Common Report Var(flag_no_inline,0) Init(2) |
f3fdaec4 | 584 | Pay attention to the \"inline\" keyword |
de32c0cb | 585 | |
4d4b8cb9 JH |
586 | finline-small-functions |
587 | Common Report Var(flag_inline_small_functions) Optimization | |
588 | Integrate simple functions into their callers when code size is known to not growth | |
589 | ||
de32c0cb | 590 | finline-functions |
c662432e | 591 | Common Report Var(flag_inline_functions) Optimization |
f3fdaec4 | 592 | Integrate simple functions into their callers |
de32c0cb | 593 | |
355866de | 594 | finline-functions-called-once |
c662432e | 595 | Common Report Var(flag_inline_functions_called_once) Init(1) Optimization |
355866de | 596 | Integrate functions called once into their callers |
d63db217 | 597 | |
d302c9d6 NB |
598 | finline-limit- |
599 | Common RejectNegative Joined UInteger | |
600 | ||
601 | finline-limit= | |
602 | Common RejectNegative Joined UInteger | |
cf03fd63 | 603 | -finline-limit=<number> Limit the size of inlined functions to <number> |
d302c9d6 | 604 | |
6ff3a151 | 605 | finstrument-functions |
50431bc4 | 606 | Common Report Var(flag_instrument_function_entry_exit) |
f3fdaec4 | 607 | Instrument function entry and exit with profiling calls |
6ff3a151 | 608 | |
8d5a7d1f ILT |
609 | finstrument-functions-exclude-function-list= |
610 | Common RejectNegative Joined | |
611 | -finstrument-functions-exclude-function-list=name,... Do not instrument listed functions | |
612 | ||
613 | finstrument-functions-exclude-file-list= | |
614 | Common RejectNegative Joined | |
615 | -finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files | |
616 | ||
d6e14e8f | 617 | fipa-cp |
c662432e | 618 | Common Report Var(flag_ipa_cp) Optimization |
d6e14e8f SB |
619 | Perform Interprocedural constant propagation |
620 | ||
ea900239 | 621 | fipa-pure-const |
c662432e | 622 | Common Report Var(flag_ipa_pure_const) Init(0) Optimization |
ea900239 DB |
623 | Discover pure and const functions |
624 | ||
4cf4d6a3 | 625 | fipa-pta |
c662432e | 626 | Common Report Var(flag_ipa_pta) Init(0) Optimization |
4cf4d6a3 DB |
627 | Perform interprocedural points-to analysis |
628 | ||
ea900239 | 629 | fipa-reference |
c662432e | 630 | Common Report Var(flag_ipa_reference) Init(0) Optimization |
ea900239 DB |
631 | Discover readonly and non addressable static variables |
632 | ||
633 | fipa-type-escape | |
c662432e | 634 | Common Report Var(flag_ipa_type_escape) Init(0) Optimization |
ea900239 DB |
635 | Type based escape and alias analysis |
636 | ||
43d861a5 | 637 | fipa-matrix-reorg |
6ae4be32 | 638 | Common Report Var(flag_ipa_matrix_reorg) Optimization |
43d861a5 RL |
639 | Perform matrix layout flattening and transposing based |
640 | on profiling information. | |
641 | ||
e1dc98b2 OG |
642 | fipa-struct-reorg |
643 | Common Report Var(flag_ipa_struct_reorg) | |
644 | Perform structure layout optimizations based | |
645 | on profiling information. | |
646 | ||
8b11a64c | 647 | fivopts |
c662432e | 648 | Common Report Var(flag_ivopts) Init(1) Optimization |
8b11a64c ZD |
649 | Optimize induction variables on trees |
650 | ||
82c0180d | 651 | fjump-tables |
c662432e | 652 | Common Var(flag_jump_tables) Init(1) Optimization |
82c0180d JM |
653 | Use jump tables for sufficiently large switch statements |
654 | ||
de32c0cb | 655 | fkeep-inline-functions |
50431bc4 | 656 | Common Report Var(flag_keep_inline_functions) |
f3fdaec4 | 657 | Generate code for functions even if they are fully inlined |
de32c0cb NB |
658 | |
659 | fkeep-static-consts | |
50431bc4 | 660 | Common Report Var(flag_keep_static_consts) Init(1) |
f3fdaec4 | 661 | Emit static const variables even if they are not used |
de32c0cb | 662 | |
6ff3a151 | 663 | fleading-underscore |
50431bc4 | 664 | Common Report Var(flag_leading_underscore) Init(-1) |
f3fdaec4 | 665 | Give external symbols a leading underscore |
6ff3a151 | 666 | |
efa1cdf0 ZD |
667 | floop-optimize |
668 | Common | |
c0220ea4 | 669 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 670 | |
6ff3a151 | 671 | fmath-errno |
50431bc4 | 672 | Common Report Var(flag_errno_math) Init(1) |
f3fdaec4 | 673 | Set errno after built-in math functions |
6ff3a151 NB |
674 | |
675 | fmem-report | |
50431bc4 | 676 | Common Report Var(mem_report) |
f3fdaec4 | 677 | Report on permanent memory allocation |
6ff3a151 | 678 | |
31b66477 KC |
679 | ; This will attempt to merge constant section constants, if 1 only |
680 | ; string constants and constants from constant pool, if 2 also constant | |
681 | ; variables. | |
6ff3a151 | 682 | fmerge-all-constants |
c662432e | 683 | Common Report Var(flag_merge_constants,2) Init(1) Optimization |
f3fdaec4 | 684 | Attempt to merge identical constants and constant variables |
6ff3a151 NB |
685 | |
686 | fmerge-constants | |
c662432e | 687 | Common Report Var(flag_merge_constants,1) VarExists Optimization |
f3fdaec4 | 688 | Attempt to merge identical constants across compilation units |
6ff3a151 | 689 | |
28a08168 ILT |
690 | fmerge-debug-strings |
691 | Common Report Var(flag_merge_debug_strings) Init(1) | |
692 | Attempt to merge identical debug strings across compilation units | |
693 | ||
de32c0cb NB |
694 | fmessage-length= |
695 | Common RejectNegative Joined UInteger | |
cf03fd63 | 696 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping |
de32c0cb | 697 | |
e5626198 | 698 | fmodulo-sched |
c662432e | 699 | Common Report Var(flag_modulo_sched) Optimization |
e5626198 AZ |
700 | Perform SMS based modulo scheduling before the first scheduling pass |
701 | ||
517d76fa VY |
702 | fmodulo-sched-allow-regmoves |
703 | Common Report Var(flag_modulo_sched_allow_regmoves) | |
704 | Perform SMS based modulo scheduling with register moves allowed | |
705 | ||
5e962776 | 706 | fmove-loop-invariants |
c662432e | 707 | Common Report Var(flag_move_loop_invariants) Init(1) Optimization |
5e962776 ZD |
708 | Move loop invariant computations out of loops |
709 | ||
6de9cd9a | 710 | fmudflap |
50431bc4 | 711 | Common RejectNegative Report Var(flag_mudflap) |
c85ce869 | 712 | Add mudflap bounds-checking instrumentation for single-threaded program |
6de9cd9a DN |
713 | |
714 | fmudflapth | |
110c4563 | 715 | Common RejectNegative Report VarExists Var(flag_mudflap,2) |
c85ce869 | 716 | Add mudflap bounds-checking instrumentation for multi-threaded program |
6de9cd9a DN |
717 | |
718 | fmudflapir | |
50431bc4 | 719 | Common RejectNegative Report Var(flag_mudflap_ignore_reads) |
c85ce869 | 720 | Ignore read operations when inserting mudflap instrumentation |
6de9cd9a | 721 | |
6fb5fa3c | 722 | fdce |
6ae4be32 | 723 | Common Var(flag_dce) Init(1) Optimization |
6fb5fa3c DB |
724 | Use the RTL dead code elimination pass |
725 | ||
726 | fdse | |
6ae4be32 | 727 | Common Var(flag_dse) Init(1) Optimization |
6fb5fa3c DB |
728 | Use the RTL dead store elimination pass |
729 | ||
d72372e4 | 730 | freschedule-modulo-scheduled-loops |
c662432e | 731 | Common Report Var(flag_resched_modulo_sched) Optimization |
d72372e4 MH |
732 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling |
733 | ||
6ff3a151 | 734 | fnon-call-exceptions |
c662432e | 735 | Common Report Var(flag_non_call_exceptions) Optimization |
f3fdaec4 | 736 | Support synchronous non-call exceptions |
6ff3a151 | 737 | |
de32c0cb | 738 | fomit-frame-pointer |
c662432e | 739 | Common Report Var(flag_omit_frame_pointer) Optimization |
f3fdaec4 | 740 | When possible do not generate stack frames |
de32c0cb | 741 | |
917948d3 ZD |
742 | fopenmp-ssa |
743 | Common Report Var(flag_openmp_ssa) | |
744 | Expand OpenMP operations on SSA form | |
745 | ||
6ff3a151 | 746 | foptimize-register-move |
c662432e | 747 | Common Report Var(flag_regmove) Optimization |
f3fdaec4 | 748 | Do the full register move optimization pass |
6ff3a151 | 749 | |
de32c0cb | 750 | foptimize-sibling-calls |
c662432e | 751 | Common Report Var(flag_optimize_sibling_calls) Optimization |
f3fdaec4 | 752 | Optimize sibling and tail recursive calls |
de32c0cb | 753 | |
a5573239 JH |
754 | fpre-ipa-mem-report |
755 | Common Report Var(pre_ipa_mem_report) | |
756 | Report on memory allocation before interprocedural optimization | |
757 | ||
758 | fpost-ipa-mem-report | |
759 | Common Report Var(post_ipa_mem_report) | |
760 | Report on memory allocation before interprocedural optimization | |
761 | ||
6ff3a151 | 762 | fpack-struct |
c662432e | 763 | Common Report Var(flag_pack_struct) Optimization |
f3fdaec4 | 764 | Pack structure members together without holes |
6ff3a151 | 765 | |
467cecf3 | 766 | fpack-struct= |
c662432e | 767 | Common RejectNegative Joined UInteger Optimization |
467cecf3 JB |
768 | -fpack-struct=<number> Set initial maximum structure member alignment |
769 | ||
de32c0cb | 770 | fpcc-struct-return |
50431bc4 | 771 | Common Report Var(flag_pcc_struct_return,1) VarExists |
f3fdaec4 | 772 | Return small aggregates in memory, not registers |
de32c0cb NB |
773 | |
774 | fpeel-loops | |
c662432e | 775 | Common Report Var(flag_peel_loops) Optimization |
f3fdaec4 | 776 | Perform loop peeling |
de32c0cb NB |
777 | |
778 | fpeephole | |
c662432e | 779 | Common Report Var(flag_no_peephole,0) Optimization |
f3fdaec4 | 780 | Enable machine specific peephole optimizations |
de32c0cb | 781 | |
6ff3a151 | 782 | fpeephole2 |
c662432e | 783 | Common Report Var(flag_peephole2) Optimization |
f3fdaec4 | 784 | Enable an RTL peephole pass before sched2 |
6ff3a151 | 785 | |
31b66477 KC |
786 | fPIC |
787 | Common Report Var(flag_pic,2) | |
788 | Generate position-independent code if possible (large mode) | |
789 | ||
790 | fPIE | |
791 | Common Report Var(flag_pie,2) | |
792 | Generate position-independent code for executables if possible (large mode) | |
793 | ||
6ff3a151 | 794 | fpic |
50431bc4 | 795 | Common Report Var(flag_pic,1) VarExists |
31b66477 | 796 | Generate position-independent code if possible (small mode) |
6ff3a151 NB |
797 | |
798 | fpie | |
50431bc4 | 799 | Common Report Var(flag_pie,1) VarExists |
31b66477 | 800 | Generate position-independent code for executables if possible (small mode) |
6ff3a151 | 801 | |
bbc8a8dc | 802 | fpredictive-commoning |
6ae4be32 | 803 | Common Report Var(flag_predictive_commoning) Optimization |
bbc8a8dc ZD |
804 | Run predictive commoning optimization. |
805 | ||
de32c0cb | 806 | fprefetch-loop-arrays |
c662432e | 807 | Common Report Var(flag_prefetch_loop_arrays) Optimization |
f3fdaec4 | 808 | Generate prefetch instructions, if available, for arrays in loops |
de32c0cb | 809 | |
6ff3a151 | 810 | fprofile |
50431bc4 | 811 | Common Report Var(profile_flag) |
f3fdaec4 | 812 | Enable basic program profiling code |
6ff3a151 NB |
813 | |
814 | fprofile-arcs | |
50431bc4 | 815 | Common Report Var(profile_arc_flag) |
f3fdaec4 | 816 | Insert arc-based program profiling code |
6ff3a151 | 817 | |
2f908293 SP |
818 | fprofile-dir= |
819 | Common Joined RejectNegative | |
820 | Set the top-level directory for storing the profile data. | |
821 | The default is 'pwd'. | |
822 | ||
a8a5f53a JH |
823 | fprofile-generate |
824 | Common | |
825 | Enable common options for generating profile info for profile feedback directed optimizations | |
826 | ||
2f908293 SP |
827 | fprofile-generate= |
828 | Common Joined RejectNegative | |
829 | Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir= | |
830 | ||
a8a5f53a | 831 | fprofile-use |
2f908293 | 832 | Common Var(flag_profile_use) |
a8a5f53a JH |
833 | Enable common options for performing profile feedback directed optimizations |
834 | ||
2f908293 SP |
835 | fprofile-use= |
836 | Common Joined RejectNegative | |
837 | Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir= | |
838 | ||
fca9dc00 | 839 | fprofile-values |
50431bc4 | 840 | Common Report Var(flag_profile_values) |
fca9dc00 ZD |
841 | Insert code to profile values of expressions |
842 | ||
de32c0cb NB |
843 | frandom-seed |
844 | Common | |
845 | ||
846 | frandom-seed= | |
847 | Common Joined RejectNegative | |
cf03fd63 | 848 | -frandom-seed=<string> Make compile reproducible using <string> |
de32c0cb | 849 | |
e0d9d0dd NC |
850 | ; This switch causes the command line that was used to create an |
851 | ; object file to be recorded into the object file. The exact format | |
852 | ; of this recording is target and binary file format dependent. | |
853 | ; It is related to the -fverbose-asm switch, but that switch only | |
854 | ; records information in the assembler output file as comments, so | |
855 | ; they never reach the object file. | |
856 | frecord-gcc-switches | |
857 | Common Report Var(flag_record_gcc_switches) | |
858 | Record gcc command line switches in the object file. | |
859 | ||
de32c0cb | 860 | freg-struct-return |
c662432e | 861 | Common Report Var(flag_pcc_struct_return,0) VarExists Optimization |
f3fdaec4 | 862 | Return small aggregates in registers |
de32c0cb | 863 | |
6ff3a151 | 864 | fregmove |
c662432e | 865 | Common Report Var(flag_regmove) Optimization |
f3fdaec4 | 866 | Enables a register move optimization |
6ff3a151 NB |
867 | |
868 | frename-registers | |
c662432e | 869 | Common Report Var(flag_rename_registers) Init(2) Optimization |
f3fdaec4 | 870 | Perform a register renaming optimization pass |
6ff3a151 NB |
871 | |
872 | freorder-blocks | |
c662432e | 873 | Common Report Var(flag_reorder_blocks) Optimization |
f3fdaec4 | 874 | Reorder basic blocks to improve code placement |
6ff3a151 | 875 | |
750054a2 | 876 | freorder-blocks-and-partition |
c662432e | 877 | Common Report Var(flag_reorder_blocks_and_partition) Optimization |
750054a2 CT |
878 | Reorder basic blocks and partition into hot and cold sections |
879 | ||
6ff3a151 | 880 | freorder-functions |
c662432e | 881 | Common Report Var(flag_reorder_functions) Optimization |
f3fdaec4 | 882 | Reorder functions to improve code placement |
6ff3a151 | 883 | |
de32c0cb | 884 | frerun-cse-after-loop |
c662432e | 885 | Common Report Var(flag_rerun_cse_after_loop) Init(2) Optimization |
f3fdaec4 | 886 | Add a common subexpression elimination pass after loop optimizations |
de32c0cb | 887 | |
efa1cdf0 ZD |
888 | frerun-loop-opt |
889 | Common | |
c0220ea4 | 890 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 891 | |
039c3d42 | 892 | frounding-math |
c662432e | 893 | Common Report Var(flag_rounding_math) Optimization |
039c3d42 RS |
894 | Disable optimizations that assume default FP rounding behavior |
895 | ||
6ff3a151 | 896 | fsched-interblock |
c662432e | 897 | Common Report Var(flag_schedule_interblock) Init(1) Optimization |
f3fdaec4 | 898 | Enable scheduling across basic blocks |
6ff3a151 NB |
899 | |
900 | fsched-spec | |
c662432e | 901 | Common Report Var(flag_schedule_speculative) Init(1) Optimization |
f3fdaec4 | 902 | Allow speculative motion of non-loads |
6ff3a151 NB |
903 | |
904 | fsched-spec-load | |
c662432e | 905 | Common Report Var(flag_schedule_speculative_load) Optimization |
f3fdaec4 | 906 | Allow speculative motion of some loads |
6ff3a151 NB |
907 | |
908 | fsched-spec-load-dangerous | |
c662432e | 909 | Common Report Var(flag_schedule_speculative_load_dangerous) Optimization |
f3fdaec4 | 910 | Allow speculative motion of more loads |
6ff3a151 | 911 | |
de32c0cb NB |
912 | fsched-verbose= |
913 | Common RejectNegative Joined | |
cf03fd63 | 914 | -fsched-verbose=<number> Set the verbosity level of the scheduler |
de32c0cb | 915 | |
6ff3a151 | 916 | fsched2-use-superblocks |
c662432e | 917 | Common Report Var(flag_sched2_use_superblocks) Optimization |
f3fdaec4 | 918 | If scheduling post reload, do superblock scheduling |
6ff3a151 NB |
919 | |
920 | fsched2-use-traces | |
c662432e | 921 | Common Report Var(flag_sched2_use_traces) Optimization |
f3fdaec4 | 922 | If scheduling post reload, do trace scheduling |
6ff3a151 | 923 | |
de32c0cb | 924 | fschedule-insns |
c662432e | 925 | Common Report Var(flag_schedule_insns) Optimization |
f3fdaec4 | 926 | Reschedule instructions before register allocation |
de32c0cb NB |
927 | |
928 | fschedule-insns2 | |
c662432e | 929 | Common Report Var(flag_schedule_insns_after_reload) Optimization |
f3fdaec4 | 930 | Reschedule instructions after register allocation |
de32c0cb | 931 | |
31b66477 KC |
932 | ; sched_stalled_insns means that insns can be moved prematurely from the queue |
933 | ; of stalled insns into the ready list. | |
569fa502 | 934 | fsched-stalled-insns |
c662432e | 935 | Common Report Var(flag_sched_stalled_insns) Optimization |
569fa502 DN |
936 | Allow premature scheduling of queued insns |
937 | ||
938 | fsched-stalled-insns= | |
c22cacf3 | 939 | Common RejectNegative Joined UInteger |
4e994432 | 940 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled |
569fa502 | 941 | |
31b66477 KC |
942 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will |
943 | ; be examined for a dependency on a stalled insn that is candidate for | |
944 | ; premature removal from the queue of stalled insns into the ready list (has | |
945 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
569fa502 | 946 | fsched-stalled-insns-dep |
c662432e | 947 | Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization |
569fa502 DN |
948 | Set dependence distance checking in premature scheduling of queued insns |
949 | ||
950 | fsched-stalled-insns-dep= | |
951 | Common RejectNegative Joined UInteger | |
4e994432 | 952 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns |
569fa502 | 953 | |
aacd3885 | 954 | fsection-anchors |
c662432e | 955 | Common Report Var(flag_section_anchors) Optimization |
aacd3885 RS |
956 | Access data in the same section from shared anchor points |
957 | ||
38109dab | 958 | frtl-abstract-sequences |
c662432e | 959 | Common Report Var(flag_rtl_seqabstr) Optimization |
38109dab GL |
960 | Perform sequence abstraction optimization on RTL |
961 | ||
8cd37d0b RL |
962 | fsee |
963 | Common Report Var(flag_see) Init(0) | |
964 | Eliminate redundant sign extensions using LCM. | |
965 | ||
8abb6b22 | 966 | fshow-column |
f6230c17 TT |
967 | Common C ObjC C++ ObjC++ Report Var(flag_show_column) Init(0) |
968 | Show column numbers in diagnostics, when available. Default off | |
8abb6b22 | 969 | |
6ff3a151 | 970 | fsignaling-nans |
c662432e | 971 | Common Report Var(flag_signaling_nans) Optimization |
f3fdaec4 | 972 | Disable optimizations observable by IEEE signaling NaNs |
6ff3a151 | 973 | |
db02da79 | 974 | fsigned-zeros |
21af5cdf | 975 | Common Report Var(flag_signed_zeros) Init(1) Optimization |
db02da79 RS |
976 | Disable floating point optimizations that ignore the IEEE signedness of zero |
977 | ||
6ff3a151 | 978 | fsingle-precision-constant |
c662432e | 979 | Common Report Var(flag_single_precision_constant) Optimization |
f3fdaec4 | 980 | Convert floating point constants to single precision constants |
6ff3a151 | 981 | |
113d659a | 982 | fsplit-ivs-in-unroller |
c662432e | 983 | Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization |
c85ce869 | 984 | Split lifetimes of induction variables when loops are unrolled |
113d659a | 985 | |
e53a16e7 | 986 | fsplit-wide-types |
21af5cdf | 987 | Common Report Var(flag_split_wide_types) Optimization |
e53a16e7 ILT |
988 | Split wide types into independent registers |
989 | ||
f37a4f14 | 990 | fvariable-expansion-in-unroller |
c662432e | 991 | Common Report Var(flag_variable_expansion_in_unroller) Optimization |
c85ce869 | 992 | Apply variable expansion when loops are unrolled |
f37a4f14 | 993 | |
31b66477 KC |
994 | ; Emit code to probe the stack, to help detect stack overflow; also |
995 | ; may cause large objects to be allocated dynamically. | |
6ff3a151 | 996 | fstack-check |
50431bc4 | 997 | Common Report Var(flag_stack_check) |
f3fdaec4 | 998 | Insert stack checking code into the program |
6ff3a151 | 999 | |
de32c0cb NB |
1000 | fstack-limit |
1001 | Common | |
1002 | ||
058de654 NB |
1003 | fstack-limit-register= |
1004 | Common RejectNegative Joined | |
cf03fd63 | 1005 | -fstack-limit-register=<register> Trap if the stack goes past <register> |
058de654 NB |
1006 | |
1007 | fstack-limit-symbol= | |
1008 | Common RejectNegative Joined | |
cf03fd63 | 1009 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name> |
058de654 | 1010 | |
7d69de61 RH |
1011 | fstack-protector |
1012 | Common Report Var(flag_stack_protect, 1) | |
1013 | Use propolice as a stack protection method | |
1014 | ||
1015 | fstack-protector-all | |
1016 | Common Report RejectNegative Var(flag_stack_protect, 2) VarExists | |
1017 | Use a stack protection method for every function | |
1018 | ||
de32c0cb | 1019 | fstrength-reduce |
efa1cdf0 | 1020 | Common |
c0220ea4 | 1021 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1022 | |
31b66477 KC |
1023 | ; Nonzero if we should do (language-dependent) alias analysis. |
1024 | ; Typically, this analysis will assume that expressions of certain | |
1025 | ; types do not alias expressions of certain other types. Only used | |
1026 | ; if alias analysis (in general) is enabled. | |
6ff3a151 | 1027 | fstrict-aliasing |
c662432e | 1028 | Common Report Var(flag_strict_aliasing) Optimization |
f3fdaec4 | 1029 | Assume strict aliasing rules apply |
6ff3a151 | 1030 | |
eeef0e45 ILT |
1031 | fstrict-overflow |
1032 | Common Report Var(flag_strict_overflow) | |
1033 | Treat signed overflow as undefined | |
1034 | ||
de32c0cb | 1035 | fsyntax-only |
50431bc4 | 1036 | Common Report Var(flag_syntax_only) |
f3fdaec4 | 1037 | Check for syntax errors, then stop |
de32c0cb | 1038 | |
6ff3a151 | 1039 | ftest-coverage |
50431bc4 | 1040 | Common Report Var(flag_test_coverage) |
f3fdaec4 | 1041 | Create data files needed by \"gcov\" |
6ff3a151 | 1042 | |
de32c0cb | 1043 | fthread-jumps |
c662432e | 1044 | Common Report Var(flag_thread_jumps) Optimization |
f3fdaec4 | 1045 | Perform jump threading optimizations |
de32c0cb | 1046 | |
6ff3a151 | 1047 | ftime-report |
50431bc4 | 1048 | Common Report Var(time_report) |
f3fdaec4 | 1049 | Report the time taken by each compiler pass |
6ff3a151 | 1050 | |
058de654 NB |
1051 | ftls-model= |
1052 | Common Joined RejectNegative | |
cf03fd63 | 1053 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model |
058de654 | 1054 | |
474eccc6 | 1055 | ftoplevel-reorder |
c662432e | 1056 | Common Report Var(flag_toplevel_reorder) Init(1) Optimization |
474eccc6 ILT |
1057 | Reorder top level functions, variables, and asms |
1058 | ||
de32c0cb | 1059 | ftracer |
50431bc4 | 1060 | Common Report Var(flag_tracer) |
f3fdaec4 | 1061 | Perform superblock formation via tail duplication |
de32c0cb | 1062 | |
31b66477 KC |
1063 | ; Zero means that floating-point math operations cannot generate a |
1064 | ; (user-visible) trap. This is the case, for example, in nonstop | |
1065 | ; IEEE 754 arithmetic. | |
6ff3a151 | 1066 | ftrapping-math |
c662432e | 1067 | Common Report Var(flag_trapping_math) Init(1) Optimization |
f3fdaec4 | 1068 | Assume floating-point operations can trap |
6ff3a151 NB |
1069 | |
1070 | ftrapv | |
c662432e | 1071 | Common Report Var(flag_trapv) Optimization |
f3fdaec4 | 1072 | Trap for signed overflow in addition, subtraction and multiplication |
6ff3a151 | 1073 | |
6de9cd9a | 1074 | ftree-ccp |
c662432e | 1075 | Common Report Var(flag_tree_ccp) Optimization |
6de9cd9a DN |
1076 | Enable SSA-CCP optimization on trees |
1077 | ||
0bca51f0 | 1078 | ftree-store-ccp |
c662432e | 1079 | Common Report Var(flag_tree_store_ccp) Optimization |
0bca51f0 DN |
1080 | Enable SSA-CCP optimization for stores and loads |
1081 | ||
6de9cd9a | 1082 | ftree-ch |
c662432e | 1083 | Common Report Var(flag_tree_ch) Optimization |
6de9cd9a DN |
1084 | Enable loop header copying on trees |
1085 | ||
6de9cd9a | 1086 | ftree-copyrename |
c662432e | 1087 | Common Report Var(flag_tree_copyrename) Optimization |
c85ce869 | 1088 | Replace SSA temporaries with better names in copies |
6de9cd9a | 1089 | |
0bca51f0 | 1090 | ftree-copy-prop |
c662432e | 1091 | Common Report Var(flag_tree_copy_prop) Optimization |
0bca51f0 DN |
1092 | Enable copy propagation on trees |
1093 | ||
1094 | ftree-store-copy-prop | |
324d2217 | 1095 | Common |
e9033855 | 1096 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 1097 | |
a5828d1e MM |
1098 | ftree-cselim |
1099 | Common Report Var(flag_tree_cselim) Init(2) Optimization | |
1100 | Transform condition stores into unconditional ones | |
1101 | ||
6de9cd9a | 1102 | ftree-dce |
c662432e | 1103 | Common Report Var(flag_tree_dce) Optimization |
6de9cd9a DN |
1104 | Enable SSA dead code elimination optimization on trees |
1105 | ||
1106 | ftree-dominator-opts | |
c662432e | 1107 | Common Report Var(flag_tree_dom) Optimization |
6de9cd9a DN |
1108 | Enable dominator optimizations |
1109 | ||
1110 | ftree-dse | |
c662432e | 1111 | Common Report Var(flag_tree_dse) Optimization |
6de9cd9a DN |
1112 | Enable dead store elimination |
1113 | ||
ff2ad0f7 | 1114 | ftree-fre |
c662432e | 1115 | Common Report Var(flag_tree_fre) Optimization |
ff2ad0f7 DN |
1116 | Enable Full Redundancy Elimination (FRE) on trees |
1117 | ||
dea61d92 SP |
1118 | ftree-loop-distribution |
1119 | Common Report Var(flag_tree_loop_distribution) | |
1120 | Enable loop distribution on trees | |
1121 | ||
1b08d87d | 1122 | ftree-loop-im |
c662432e | 1123 | Common Report Var(flag_tree_loop_im) Init(1) Optimization |
a7e5372d ZD |
1124 | Enable loop invariant motion on trees |
1125 | ||
599eabdb | 1126 | ftree-loop-linear |
c662432e | 1127 | Common Report Var(flag_tree_loop_linear) Optimization |
599eabdb DB |
1128 | Enable linear loop transforms on trees |
1129 | ||
1b08d87d | 1130 | ftree-loop-ivcanon |
c662432e | 1131 | Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization |
1b08d87d DB |
1132 | Create canonical induction variables in loops |
1133 | ||
c66b6c66 | 1134 | ftree-loop-optimize |
c662432e | 1135 | Common Report Var(flag_tree_loop_optimize) Init(1) Optimization |
c66b6c66 ZD |
1136 | Enable loop optimizations on tree level |
1137 | ||
5f40b3cb ZD |
1138 | ftree-parallelize-loops= |
1139 | Common Report Joined UInteger Var(flag_tree_parallelize_loops) Init(1) | |
1140 | Enable automatic parallelization of loops | |
1141 | ||
6de9cd9a | 1142 | ftree-pre |
c662432e | 1143 | Common Report Var(flag_tree_pre) Optimization |
6de9cd9a DN |
1144 | Enable SSA-PRE optimization on trees |
1145 | ||
13c59415 UB |
1146 | ftree-reassoc |
1147 | Common Report Var(flag_tree_reassoc) Init(1) Optimization | |
1148 | Enable reassociation on tree level | |
1149 | ||
c75ab022 | 1150 | ftree-salias |
c662432e | 1151 | Common Report Var(flag_tree_salias) Optimization |
c75ab022 DB |
1152 | Perform structural alias analysis |
1153 | ||
fa555252 | 1154 | ftree-sink |
c662432e | 1155 | Common Report Var(flag_tree_sink) Optimization |
fa555252 DB |
1156 | Enable SSA code sinking on trees |
1157 | ||
6de9cd9a | 1158 | ftree-sra |
c662432e | 1159 | Common Report Var(flag_tree_sra) Optimization |
6de9cd9a DN |
1160 | Perform scalar replacement of aggregates |
1161 | ||
1162 | ftree-ter | |
c662432e | 1163 | Common Report Var(flag_tree_ter) Optimization |
6de9cd9a DN |
1164 | Replace temporary expressions in the SSA->normal pass |
1165 | ||
c662432e NC |
1166 | ftree-lrs |
1167 | Common Report Var(flag_tree_live_range_split) Optimization | |
1168 | Perform live range splitting during the SSA->normal pass | |
1169 | ||
0bca51f0 | 1170 | ftree-vrp |
c662432e | 1171 | Common Report Var(flag_tree_vrp) Init(0) Optimization |
0bca51f0 DN |
1172 | Perform Value Range Propagation on trees |
1173 | ||
de32c0cb | 1174 | funit-at-a-time |
c662432e | 1175 | Common Report Var(flag_unit_at_a_time) Optimization |
f3fdaec4 | 1176 | Compile whole compilation unit at a time |
de32c0cb NB |
1177 | |
1178 | funroll-loops | |
c662432e | 1179 | Common Report Var(flag_unroll_loops) Optimization |
f3fdaec4 | 1180 | Perform loop unrolling when iteration count is known |
de32c0cb NB |
1181 | |
1182 | funroll-all-loops | |
c662432e | 1183 | Common Report Var(flag_unroll_all_loops) Optimization |
f3fdaec4 | 1184 | Perform loop unrolling for all loops |
de32c0cb | 1185 | |
f9cc1a70 PB |
1186 | ; Nonzero means that loop optimizer may assume that the induction variables |
1187 | ; that control loops do not overflow and that the loops with nontrivial | |
1188 | ; exit condition are not infinite | |
1189 | funsafe-loop-optimizations | |
c662432e | 1190 | Common Report Var(flag_unsafe_loop_optimizations) Optimization |
f9cc1a70 PB |
1191 | Allow loop optimizations to assume that the loops behave in normal way |
1192 | ||
a1a82611 RE |
1193 | fassociative-math |
1194 | Common Report Var(flag_associative_math) | |
1195 | Allow optimization for floating-point arithmetic which may change the | |
1196 | result of the operation due to rounding. | |
1197 | ||
1198 | freciprocal-math | |
1199 | Common Report Var(flag_reciprocal_math) | |
1200 | Same as -fassociative-math for expressions which include division. | |
1201 | ||
31b66477 KC |
1202 | ; Nonzero means that unsafe floating-point math optimizations are allowed |
1203 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
1204 | ; are allowed to assume that their arguments and results are "normal" | |
1205 | ; (e.g., nonnegative for SQRT). | |
6ff3a151 | 1206 | funsafe-math-optimizations |
c662432e | 1207 | Common Report Var(flag_unsafe_math_optimizations) Optimization |
f3fdaec4 | 1208 | Allow math optimizations that may violate IEEE or ISO standards |
6ff3a151 | 1209 | |
de32c0cb | 1210 | funswitch-loops |
c662432e | 1211 | Common Report Var(flag_unswitch_loops) Optimization |
f3fdaec4 | 1212 | Perform loop unswitching |
de32c0cb | 1213 | |
6ff3a151 | 1214 | funwind-tables |
c662432e | 1215 | Common Report Var(flag_unwind_tables) Optimization |
f3fdaec4 | 1216 | Just generate unwind tables for exception handling |
6ff3a151 | 1217 | |
014a1138 | 1218 | fvar-tracking |
c662432e | 1219 | Common Report Var(flag_var_tracking) VarExists Optimization |
014a1138 JZ |
1220 | Perform variable tracking |
1221 | ||
62760ffd CT |
1222 | fvar-tracking-uninit |
1223 | Common Report Var(flag_var_tracking_uninit) Optimization | |
1224 | Perform variable tracking and also tag variables that are uninitialized | |
1225 | ||
79fe1b3b | 1226 | ftree-vectorize |
c662432e | 1227 | Common Report Var(flag_tree_vectorize) Optimization |
79fe1b3b DN |
1228 | Enable loop vectorization on trees |
1229 | ||
792ed98b HJ |
1230 | fvect-cost-model |
1231 | Common Report Var(flag_vect_cost_model) Optimization | |
1232 | Enable use of cost model in vectorization | |
1233 | ||
c12cc930 | 1234 | ftree-vect-loop-version |
c662432e | 1235 | Common Report Var(flag_tree_vect_loop_version) Init(1) Optimization |
c12cc930 KB |
1236 | Enable loop versioning when doing loop vectorization on trees |
1237 | ||
c866976a LB |
1238 | ftree-vectorizer-verbose= |
1239 | Common RejectNegative Joined | |
4e994432 | 1240 | -ftree-vectorizer-verbose=<number> Set the verbosity level of the vectorizer |
c866976a | 1241 | |
fbf798fc | 1242 | ftree-scev-cprop |
21af5cdf | 1243 | Common Report Var(flag_tree_scev_cprop) Init(1) Optimization |
fbf798fc DN |
1244 | Enable copy propagation of scalar-evolution information. |
1245 | ||
31b66477 KC |
1246 | ; -fverbose-asm causes extra commentary information to be produced in |
1247 | ; the generated assembly code (to make it more readable). This option | |
1248 | ; is generally only of use to those who actually need to read the | |
1249 | ; generated assembly code (perhaps while debugging the compiler itself). | |
1250 | ; -fno-verbose-asm, the default, causes the extra information | |
1251 | ; to not be added and is useful when comparing two assembler files. | |
6ff3a151 | 1252 | fverbose-asm |
50431bc4 | 1253 | Common Report Var(flag_verbose_asm) |
f3fdaec4 | 1254 | Add extra commentary to assembler output |
6ff3a151 | 1255 | |
d7afec4b ND |
1256 | fvisibility= |
1257 | Common Joined RejectNegative | |
1258 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility | |
1259 | ||
1260 | ||
fca9dc00 | 1261 | fvpt |
c662432e | 1262 | Common Report Var(flag_value_profile_transformations) Optimization |
fca9dc00 ZD |
1263 | Use expression value profiles in optimizations |
1264 | ||
62551c66 | 1265 | fweb |
c662432e | 1266 | Common Report Var(flag_web) Init(2) Optimization |
62551c66 JH |
1267 | Construct webs and split unrelated uses of single variable |
1268 | ||
ce91e74c | 1269 | fwhole-program |
c662432e | 1270 | Common Report Var(flag_whole_program) Init(0) Optimization |
ce91e74c JH |
1271 | Perform whole program optimizations |
1272 | ||
6ff3a151 | 1273 | fwrapv |
c662432e | 1274 | Common Report Var(flag_wrapv) Optimization |
f3fdaec4 | 1275 | Assume signed arithmetic overflow wraps around |
6ff3a151 | 1276 | |
6ff3a151 | 1277 | fzero-initialized-in-bss |
50431bc4 | 1278 | Common Report Var(flag_zero_initialized_in_bss) Init(1) |
f3fdaec4 | 1279 | Put zero initialized data in the bss section |
6ff3a151 | 1280 | |
e01cc6dc NB |
1281 | g |
1282 | Common JoinedOrMissing | |
df38ffef NB |
1283 | Generate debug information in default format |
1284 | ||
1285 | gcoff | |
14c7833c | 1286 | Common JoinedOrMissing Negative(gdwarf-2) |
df38ffef NB |
1287 | Generate debug information in COFF format |
1288 | ||
df38ffef | 1289 | gdwarf-2 |
14c7833c | 1290 | Common JoinedOrMissing Negative(gstabs) |
df38ffef NB |
1291 | Generate debug information in DWARF v2 format |
1292 | ||
1293 | ggdb | |
1294 | Common JoinedOrMissing | |
1295 | Generate debug information in default extended format | |
1296 | ||
1297 | gstabs | |
14c7833c | 1298 | Common JoinedOrMissing Negative(gstabs+) |
df38ffef NB |
1299 | Generate debug information in STABS format |
1300 | ||
1301 | gstabs+ | |
14c7833c | 1302 | Common JoinedOrMissing Negative(gvms) |
df38ffef NB |
1303 | Generate debug information in extended STABS format |
1304 | ||
1305 | gvms | |
14c7833c | 1306 | Common JoinedOrMissing Negative(gxcoff) |
df38ffef NB |
1307 | Generate debug information in VMS format |
1308 | ||
1309 | gxcoff | |
14c7833c | 1310 | Common JoinedOrMissing Negative(gxcoff+) |
df38ffef NB |
1311 | Generate debug information in XCOFF format |
1312 | ||
1313 | gxcoff+ | |
14c7833c | 1314 | Common JoinedOrMissing Negative(gcoff) |
df38ffef | 1315 | Generate debug information in extended XCOFF format |
e01cc6dc | 1316 | |
d185d268 NB |
1317 | o |
1318 | Common Joined Separate | |
cf03fd63 | 1319 | -o <file> Place output into <file> |
d185d268 NB |
1320 | |
1321 | p | |
50431bc4 | 1322 | Common Var(profile_flag) |
cf03fd63 | 1323 | Enable function profiling |
d185d268 NB |
1324 | |
1325 | pedantic | |
50431bc4 | 1326 | Common Var(pedantic) |
cf03fd63 | 1327 | Issue warnings needed for strict compliance to the standard |
d185d268 NB |
1328 | |
1329 | pedantic-errors | |
1330 | Common | |
cf03fd63 | 1331 | Like -pedantic but issue them as errors |
d185d268 | 1332 | |
d7b42618 | 1333 | quiet |
50431bc4 | 1334 | Common Var(quiet_flag) |
cf03fd63 | 1335 | Do not display functions compiled or elapsed time |
d7b42618 | 1336 | |
d185d268 | 1337 | version |
50431bc4 | 1338 | Common Var(version_flag) |
cf03fd63 | 1339 | Display the compiler's version |
d185d268 NB |
1340 | |
1341 | w | |
50431bc4 | 1342 | Common Var(inhibit_warnings) |
cf03fd63 | 1343 | Suppress warnings |
d185d268 | 1344 | |
528dc603 L |
1345 | shared |
1346 | Common RejectNegative Negative(pie) | |
1347 | Create a shared library | |
1348 | ||
1349 | pie | |
1350 | Common RejectNegative Negative(shared) | |
1351 | Create a position independent executable | |
1352 | ||
d7b42618 | 1353 | ; This comment is to ensure we retain the blank line above. |