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Commit | Line | Data |
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3272db82 | 1 | ; Options for the language- and target-independent parts of the compiler. |
2e9da478 | 2 | |
50ca7c37 | 3 | ; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
7765591b | 4 | ; Free Software Foundation, Inc. |
3272db82 | 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 | |
8c4c00c1 | 10 | ; Software Foundation; either version 3, or (at your option) any later |
3272db82 | 11 | ; version. |
a0c938f0 | 12 | ; |
3272db82 | 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. | |
a0c938f0 | 17 | ; |
3272db82 | 18 | ; You should have received a copy of the GNU General Public License |
8c4c00c1 | 19 | ; along with GCC; see the file COPYING3. If not see |
20 | ; <http://www.gnu.org/licenses/>. | |
3272db82 | 21 | |
a4b0007b | 22 | ; See the GCC internals manual (options.texi) for a description of this file's format. |
3272db82 | 23 | |
24 | ; Please try to keep this file in ASCII collating order. | |
25 | ||
e690b385 | 26 | -help |
27 | Common | |
53b8e5c1 | 28 | Display this information |
e690b385 | 29 | |
87c75316 | 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 | |
da3b1bab | 33 | |
e690b385 | 34 | -target-help |
35 | Common | |
87c75316 | 36 | Alias for --help=target |
37 | ||
39932bd2 | 38 | ;; The following four entries are to work around the gcc driver |
87c75316 | 39 | ;; program's insatiable desire to turn options starting with a |
40 | ;; double dash (--) into options starting with a dash f (-f). | |
41 | fhelp | |
2dfeb300 | 42 | Common Var(help_flag) |
87c75316 | 43 | |
44 | fhelp= | |
45 | Common Joined | |
46 | ||
47 | ftarget-help | |
48 | Common | |
49 | ||
39932bd2 | 50 | fversion |
51 | Common | |
52 | ||
87c75316 | 53 | -param |
54 | Common Separate | |
55 | --param <param>=<value> Set parameter <param> to value. See below for a complete list of parameters | |
e690b385 | 56 | |
57 | -version | |
58 | Common | |
59 | ||
60 | G | |
837277ab | 61 | Common Joined Separate UInteger |
53b8e5c1 | 62 | -G<number> Put global and static data smaller than <number> bytes into a special section (on some targets) |
e690b385 | 63 | |
da3b1bab | 64 | O |
46f8e3b0 | 65 | Common JoinedOrMissing Optimization |
53b8e5c1 | 66 | -O<number> Set optimization level to <number> |
da3b1bab | 67 | |
68 | Os | |
46f8e3b0 | 69 | Common Optimization |
53b8e5c1 | 70 | Optimize for space rather than speed |
da3b1bab | 71 | |
1ebc0b9f | 72 | Ofast |
73 | Common Optimization | |
74 | Optimize for speed disregarding exact standards compliance | |
75 | ||
da3b1bab | 76 | W |
a0ded67b | 77 | Common RejectNegative Var(extra_warnings) Warning |
bb0814ce | 78 | This switch is deprecated; use -Wextra instead |
da3b1bab | 79 | |
6f2f567f | 80 | Waggregate-return |
87c75316 | 81 | Common Var(warn_aggregate_return) Warning |
bb0814ce | 82 | Warn about returning structures, unions or arrays |
6f2f567f | 83 | |
5bc96398 | 84 | Warray-bounds |
e8831472 | 85 | Common Var(warn_array_bounds) Warning |
5bc96398 | 86 | Warn if an array is accessed out of bounds |
87 | ||
9b2d6d13 | 88 | Wattributes |
87c75316 | 89 | Common Var(warn_attributes) Init(1) Warning |
9b2d6d13 | 90 | Warn about inappropriate attribute usage |
91 | ||
6f2f567f | 92 | Wcast-align |
87c75316 | 93 | Common Var(warn_cast_align) Warning |
bb0814ce | 94 | Warn about pointer casts which increase alignment |
6f2f567f | 95 | |
3a79f5da | 96 | Wcpp |
97 | Common Var(warn_cpp) Init(1) Warning | |
98 | Warn when a #warning directive is encountered | |
99 | ||
6f2f567f | 100 | Wdeprecated-declarations |
87c75316 | 101 | Common Var(warn_deprecated_decl) Init(1) Warning |
bb0814ce | 102 | Warn about uses of __attribute__((deprecated)) declarations |
6f2f567f | 103 | |
104 | Wdisabled-optimization | |
87c75316 | 105 | Common Var(warn_disabled_optimization) Warning |
bb0814ce | 106 | Warn when an optimization pass is disabled |
6f2f567f | 107 | |
108 | Werror | |
2e9da478 | 109 | Common Var(warnings_are_errors) |
bb0814ce | 110 | Treat all warnings as errors |
6f2f567f | 111 | |
76f02516 | 112 | Werror= |
113 | Common Joined | |
114 | Treat specified warning as error | |
115 | ||
da3b1bab | 116 | Wextra |
a0ded67b | 117 | Common Var(extra_warnings) Warning |
53b8e5c1 | 118 | Print extra (possibly unwanted) warnings |
da3b1bab | 119 | |
295acf4f | 120 | Wfatal-errors |
2e9da478 | 121 | Common Var(flag_fatal_errors) |
295acf4f | 122 | Exit on the first error occurred |
123 | ||
6fdade09 | 124 | Wframe-larger-than= |
125 | Common RejectNegative Joined UInteger | |
cf210371 | 126 | -Wframe-larger-than=<number> Warn if a function's stack frame requires more than <number> bytes |
6fdade09 | 127 | |
6f2f567f | 128 | Winline |
87c75316 | 129 | Common Var(warn_inline) Warning |
bb0814ce | 130 | Warn when an inlined function cannot be inlined |
6f2f567f | 131 | |
132 | Wlarger-than- | |
f00fc6e6 | 133 | Common RejectNegative Joined UInteger Warning Undocumented |
17c66687 | 134 | |
135 | Wlarger-than= | |
136 | Common RejectNegative Joined UInteger Warning | |
137 | -Wlarger-than=<number> Warn if an object is larger than <number> bytes | |
6f2f567f | 138 | |
7e3cc681 | 139 | Wunsafe-loop-optimizations |
87c75316 | 140 | Common Var(warn_unsafe_loop_optimizations) Warning |
7e3cc681 | 141 | Warn if the loop cannot be optimized due to nontrivial assumptions. |
142 | ||
6f2f567f | 143 | Wmissing-noreturn |
87c75316 | 144 | Common Var(warn_missing_noreturn) Warning |
bb0814ce | 145 | Warn about functions which might be candidates for __attribute__((noreturn)) |
6f2f567f | 146 | |
f63eb5d3 | 147 | Wmudflap |
148 | Common Var(warn_mudflap) Init(1) Warning | |
149 | Warn about constructs not instrumented by -fmudflap | |
150 | ||
55972f40 | 151 | Woverflow |
87c75316 | 152 | Common Var(warn_overflow) Init(1) Warning |
55972f40 | 153 | Warn about overflow in arithmetic expressions |
154 | ||
6f2f567f | 155 | Wpacked |
87c75316 | 156 | Common Var(warn_packed) Warning |
bb0814ce | 157 | Warn when the packed attribute has no effect on struct layout |
6f2f567f | 158 | |
159 | Wpadded | |
87c75316 | 160 | Common Var(warn_padded) Warning |
bb0814ce | 161 | Warn when padding is required to align structure members |
6f2f567f | 162 | |
163 | Wshadow | |
87c75316 | 164 | Common Var(warn_shadow) Warning |
bb0814ce | 165 | Warn when one local variable shadows another |
6f2f567f | 166 | |
f1a0edff | 167 | Wstack-protector |
87c75316 | 168 | Common Var(warn_stack_protect) Warning |
f1a0edff | 169 | Warn when not issuing stack smashing protection for some reason |
170 | ||
6f2f567f | 171 | Wstrict-aliasing |
87c75316 | 172 | Common Warning |
bb0814ce | 173 | Warn about code which might break strict aliasing rules |
6f2f567f | 174 | |
c1628b55 | 175 | Wstrict-aliasing= |
212cc995 | 176 | Common Joined RejectNegative UInteger Var(warn_strict_aliasing) Init(-1) Warning |
c1628b55 | 177 | Warn about code which might break strict aliasing rules |
178 | ||
add6ee5e | 179 | Wstrict-overflow |
e8831472 | 180 | Common Warning |
add6ee5e | 181 | Warn about optimizations that assume that signed overflow is undefined |
182 | ||
183 | Wstrict-overflow= | |
212cc995 | 184 | Common Joined RejectNegative UInteger Var(warn_strict_overflow) Init(-1) Warning |
add6ee5e | 185 | Warn about optimizations that assume that signed overflow is undefined |
186 | ||
2c06958d | 187 | Wsuggest-attribute=const |
188 | Common Var(warn_suggest_attribute_const) Warning | |
189 | Warn about functions which might be candidates for __attribute__((const)) | |
190 | ||
191 | Wsuggest-attribute=pure | |
192 | Common Var(warn_suggest_attribute_pure) Warning | |
193 | Warn about functions which might be candidates for __attribute__((pure)) | |
194 | ||
43d60d64 | 195 | Wsuggest-attribute=noreturn |
196 | Common Var(warn_suggest_attribute_noreturn) Warning | |
197 | Warn about functions which might be candidates for __attribute__((noreturn)) | |
198 | ||
6f2f567f | 199 | Wswitch |
87c75316 | 200 | Common Var(warn_switch) Warning |
bb0814ce | 201 | Warn about enumerated switches, with no default, missing a case |
6f2f567f | 202 | |
203 | Wswitch-default | |
87c75316 | 204 | Common Var(warn_switch_default) Warning |
bb0814ce | 205 | Warn about enumerated switches missing a \"default:\" statement |
6f2f567f | 206 | |
207 | Wswitch-enum | |
87c75316 | 208 | Common Var(warn_switch_enum) Warning |
bb0814ce | 209 | Warn about all enumerated switches missing a specific case |
6f2f567f | 210 | |
211 | Wsystem-headers | |
87c75316 | 212 | Common Var(warn_system_headers) Warning |
72528c71 | 213 | Do not suppress warnings from system headers |
6f2f567f | 214 | |
100b67da | 215 | Wtype-limits |
216 | Common Var(warn_type_limits) Init(-1) Warning | |
217 | Warn if a comparison is always true or always false due to the limited range of the data type | |
218 | ||
6f2f567f | 219 | Wuninitialized |
a0ded67b | 220 | Common Var(warn_uninitialized) Init(-1) Warning |
bb0814ce | 221 | Warn about uninitialized automatic variables |
6f2f567f | 222 | |
223 | Wunreachable-code | |
cc029bec | 224 | Common |
225 | Does nothing. Preserved for backward compatibility. | |
6f2f567f | 226 | |
da3b1bab | 227 | Wunused |
278e3a1f | 228 | Common Var(warn_unused) Init(0) Warning |
53b8e5c1 | 229 | Enable all -Wunused- warnings |
da3b1bab | 230 | |
abc6c64f | 231 | Wunused-but-set-parameter |
232 | Common Var(warn_unused_but_set_parameter) Init(-1) Warning | |
233 | Warn when a function parameter is only set, otherwise unused | |
234 | ||
235 | Wunused-but-set-variable | |
236 | Common Var(warn_unused_but_set_variable) Init(-1) Warning | |
237 | Warn when a variable is only set, otherwise unused | |
238 | ||
6f2f567f | 239 | Wunused-function |
278e3a1f | 240 | Common Var(warn_unused_function) Init(-1) Warning |
bb0814ce | 241 | Warn when a function is unused |
6f2f567f | 242 | |
243 | Wunused-label | |
278e3a1f | 244 | Common Var(warn_unused_label) Init(-1) Warning |
bb0814ce | 245 | Warn when a label is unused |
6f2f567f | 246 | |
247 | Wunused-parameter | |
278e3a1f | 248 | Common Var(warn_unused_parameter) Init(-1) Warning |
bb0814ce | 249 | Warn when a function parameter is unused |
6f2f567f | 250 | |
251 | Wunused-value | |
278e3a1f | 252 | Common Var(warn_unused_value) Init(-1) Warning |
bb0814ce | 253 | Warn when an expression value is unused |
6f2f567f | 254 | |
255 | Wunused-variable | |
278e3a1f | 256 | Common Var(warn_unused_variable) Init(-1) Warning |
bb0814ce | 257 | Warn when a variable is unused |
6f2f567f | 258 | |
c81ed7c1 | 259 | Wcoverage-mismatch |
21cd990d | 260 | Common Var(warn_coverage_mismatch) Init(1) Warning |
261 | Warn in case profiles in -fprofile-use do not match | |
c81ed7c1 | 262 | |
e690b385 | 263 | aux-info |
264 | Common Separate | |
53b8e5c1 | 265 | -aux-info <file> Emit declaration information into <file> |
e690b385 | 266 | |
267 | aux-info= | |
268 | Common Joined | |
269 | ||
270 | auxbase | |
271 | Common Separate | |
272 | ||
273 | auxbase-strip | |
274 | Common Separate | |
275 | ||
276 | d | |
277 | Common Joined | |
53b8e5c1 | 278 | -d<letters> Enable dumps from specific passes of the compiler |
e690b385 | 279 | |
280 | dumpbase | |
281 | Common Separate | |
53b8e5c1 | 282 | -dumpbase <file> Set the file basename to be used for dumps |
e690b385 | 283 | |
50ca7c37 | 284 | dumpdir |
285 | Common Separate | |
eb21bbd2 | 286 | -dumpdir <dir> Set the directory name to be used for dumps |
50ca7c37 | 287 | |
82a16202 | 288 | ; The version of the C++ ABI in use. The following values are allowed: |
289 | ; | |
290 | ; 0: The version of the ABI believed most conformant with the C++ ABI | |
291 | ; specification. This ABI may change as bugs are discovered and fixed. | |
292 | ; Therefore, 0 will not necessarily indicate the same ABI in different | |
293 | ; versions of G++. | |
294 | ; | |
295 | ; 1: The version of the ABI first used in G++ 3.2. | |
296 | ; | |
29e2e80a | 297 | ; 2: The version of the ABI first used in G++ 3.4 (and current default). |
298 | ; | |
299 | ; 3: The version of the ABI that fixes the missing underscore | |
300 | ; in template non-type arguments of pointer type. | |
301 | ; | |
302 | ; 4: The version of the ABI that introduces unambiguous mangling of | |
303 | ; vector types. | |
e9e7c198 | 304 | ; |
82a16202 | 305 | ; Additional positive integers will be assigned as new versions of |
306 | ; the ABI become the default version of the ABI. | |
e100aadc | 307 | fabi-version= |
212cc995 | 308 | Common Joined RejectNegative UInteger Var(flag_abi_version) Init(2) |
e100aadc | 309 | |
ecdb6d1a | 310 | falign-functions |
46f8e3b0 | 311 | Common Report Var(align_functions,0) Optimization UInteger |
72528c71 | 312 | Align the start of functions |
ecdb6d1a | 313 | |
941a4893 | 314 | falign-functions= |
315 | Common RejectNegative Joined UInteger | |
316 | ||
ecdb6d1a | 317 | falign-jumps |
46f8e3b0 | 318 | Common Report Var(align_jumps,0) Optimization UInteger |
72528c71 | 319 | Align labels which are only reached by jumping |
ecdb6d1a | 320 | |
941a4893 | 321 | falign-jumps= |
322 | Common RejectNegative Joined UInteger | |
323 | ||
ecdb6d1a | 324 | falign-labels |
46f8e3b0 | 325 | Common Report Var(align_labels,0) Optimization UInteger |
72528c71 | 326 | Align all labels |
ecdb6d1a | 327 | |
941a4893 | 328 | falign-labels= |
329 | Common RejectNegative Joined UInteger | |
330 | ||
ecdb6d1a | 331 | falign-loops |
46f8e3b0 | 332 | Common Report Var(align_loops) Optimization UInteger |
72528c71 | 333 | Align the start of loops |
ecdb6d1a | 334 | |
941a4893 | 335 | falign-loops= |
336 | Common RejectNegative Joined UInteger | |
337 | ||
ecdb6d1a | 338 | fargument-alias |
e190b18a | 339 | Common |
340 | Does nothing. Preserved for backward compatibility. | |
ecdb6d1a | 341 | |
342 | fargument-noalias | |
e190b18a | 343 | Common |
344 | Does nothing. Preserved for backward compatibility. | |
ecdb6d1a | 345 | |
346 | fargument-noalias-global | |
e190b18a | 347 | Common |
348 | Does nothing. Preserved for backward compatibility. | |
ecdb6d1a | 349 | |
5ff22aea | 350 | fargument-noalias-anything |
e190b18a | 351 | Common |
352 | Does nothing. Preserved for backward compatibility. | |
5ff22aea | 353 | |
ecdb6d1a | 354 | fasynchronous-unwind-tables |
87c75316 | 355 | Common Report Var(flag_asynchronous_unwind_tables) Optimization |
72528c71 | 356 | Generate unwind tables that are exact at each instruction boundary |
ecdb6d1a | 357 | |
3072d30e | 358 | fauto-inc-dec |
359 | Common Report Var(flag_auto_inc_dec) Init(1) | |
360 | Generate auto-inc/dec instructions | |
361 | ||
82a16202 | 362 | ; -fcheck-bounds causes gcc to generate array bounds checks. |
363 | ; For C, C++ and ObjC: defaults off. | |
364 | ; For Java: defaults to on. | |
365 | ; For Fortran: defaults to off. | |
ecdb6d1a | 366 | fbounds-check |
2e9da478 | 367 | Common Report Var(flag_bounds_check) |
72528c71 | 368 | Generate code to check bounds before indexing arrays |
ecdb6d1a | 369 | |
370 | fbranch-count-reg | |
87c75316 | 371 | Common Report Var(flag_branch_on_count_reg) Init(1) Optimization |
72528c71 | 372 | Replace add, compare, branch with branch on count register |
ecdb6d1a | 373 | |
374 | fbranch-probabilities | |
87c75316 | 375 | Common Report Var(flag_branch_probabilities) Optimization |
72528c71 | 376 | Use profiling information for branch probabilities |
ecdb6d1a | 377 | |
1e06725a | 378 | fbranch-target-load-optimize |
87c75316 | 379 | Common Report Var(flag_branch_target_load_optimize) Optimization |
72528c71 | 380 | Perform branch target load optimization before prologue / epilogue threading |
1e06725a | 381 | |
382 | fbranch-target-load-optimize2 | |
87c75316 | 383 | Common Report Var(flag_branch_target_load_optimize2) Optimization |
72528c71 | 384 | Perform branch target load optimization after prologue / epilogue threading |
1e06725a | 385 | |
08d163a9 | 386 | fbtr-bb-exclusive |
87c75316 | 387 | Common Report Var(flag_btr_bb_exclusive) Optimization |
08d163a9 | 388 | Restrict target load migration not to re-use registers in any basic block |
389 | ||
941a4893 | 390 | fcall-saved- |
391 | Common Joined RejectNegative | |
53b8e5c1 | 392 | -fcall-saved-<register> Mark <register> as being preserved across functions |
941a4893 | 393 | |
394 | fcall-used- | |
395 | Common Joined RejectNegative | |
53b8e5c1 | 396 | -fcall-used-<register> Mark <register> as being corrupted by function calls |
941a4893 | 397 | |
82a16202 | 398 | ; Nonzero for -fcaller-saves: allocate values in regs that need to |
399 | ; be saved across function calls, if that produces overall better code. | |
400 | ; Optional now, so people can test it. | |
1e06725a | 401 | fcaller-saves |
87c75316 | 402 | Common Report Var(flag_caller_saves) Optimization |
72528c71 | 403 | Save registers around function calls |
1e06725a | 404 | |
355572cc | 405 | fcheck-data-deps |
406 | Common Report Var(flag_check_data_deps) | |
407 | Compare the results of several data dependence analyzers. | |
408 | ||
ecdb6d1a | 409 | fcommon |
87c75316 | 410 | Common Report Var(flag_no_common,0) Optimization |
72528c71 | 411 | Do not put uninitialized globals in the common section |
ecdb6d1a | 412 | |
71278019 | 413 | fcompare-debug= |
414 | Common JoinedOrMissing RejectNegative Var(flag_compare_debug_opt) | |
cf210371 | 415 | -fcompare-debug[=<opts>] Compile with and without e.g. -gtoggle, and compare the final-insns dump |
71278019 | 416 | |
417 | fcompare-debug-second | |
418 | Common RejectNegative Var(flag_compare_debug) | |
419 | Run only the second compilation of -fcompare-debug | |
420 | ||
9845d120 | 421 | fconserve-stack |
422 | Common Var(flag_conserve_stack) Optimization | |
423 | Do not perform optimizations increasing noticeably stack usage | |
424 | ||
ecdb6d1a | 425 | fcprop-registers |
87c75316 | 426 | Common Report Var(flag_cprop_registers) Optimization |
72528c71 | 427 | Perform a register copy-propagation optimization pass |
ecdb6d1a | 428 | |
1e06725a | 429 | fcrossjumping |
87c75316 | 430 | Common Report Var(flag_crossjumping) Optimization |
72528c71 | 431 | Perform cross-jumping optimization |
1e06725a | 432 | |
433 | fcse-follow-jumps | |
87c75316 | 434 | Common Report Var(flag_cse_follow_jumps) Optimization |
72528c71 | 435 | When running CSE, follow jumps to their targets |
1e06725a | 436 | |
437 | fcse-skip-blocks | |
d743aba2 | 438 | Common |
439 | Does nothing. Preserved for backward compatibility. | |
1e06725a | 440 | |
45b9d334 | 441 | fcx-limited-range |
87c75316 | 442 | Common Report Var(flag_cx_limited_range) Optimization |
45b9d334 | 443 | Omit range reduction step when performing complex division |
444 | ||
608256a0 | 445 | fcx-fortran-rules |
446 | Common Report Var(flag_cx_fortran_rules) Optimization | |
447 | Complex multiplication and division follow Fortran rules | |
448 | ||
ecdb6d1a | 449 | fdata-sections |
87c75316 | 450 | Common Report Var(flag_data_sections) Optimization |
72528c71 | 451 | Place data items into their own section |
ecdb6d1a | 452 | |
d2153a46 | 453 | fdbg-cnt-list |
454 | Common Report | |
455 | List all available debugging counters with their limits and counts. | |
456 | ||
3072d30e | 457 | fdbg-cnt= |
458 | Common RejectNegative Joined | |
cf210371 | 459 | -fdbg-cnt=<counter>:<limit>[,<counter>:<limit>,...] Set the debug counter limit. |
3072d30e | 460 | |
5f1f2de5 | 461 | fdebug-prefix-map= |
462 | Common Joined RejectNegative | |
463 | Map one directory name to another in debug information | |
464 | ||
82a16202 | 465 | ; Nonzero for -fdefer-pop: don't pop args after each function call |
466 | ; instead save them up to pop many calls' args with one insns. | |
1e06725a | 467 | fdefer-pop |
87c75316 | 468 | Common Report Var(flag_defer_pop) Optimization |
72528c71 | 469 | Defer popping functions args from stack until later |
1e06725a | 470 | |
471 | fdelayed-branch | |
87c75316 | 472 | Common Report Var(flag_delayed_branch) Optimization |
72528c71 | 473 | Attempt to fill delay slots of branch instructions |
1e06725a | 474 | |
475 | fdelete-null-pointer-checks | |
7df298fe | 476 | Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization |
72528c71 | 477 | Delete useless null pointer checks |
1e06725a | 478 | |
479 | fdiagnostics-show-location= | |
480 | Common Joined RejectNegative | |
53b8e5c1 | 481 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics |
1e06725a | 482 | |
efb9d9ee | 483 | fdiagnostics-show-option |
3fee9a69 | 484 | Common Var(flag_diagnostics_show_option) Init(1) |
3284a242 | 485 | Amend appropriate diagnostic messages with the command line option that controls them |
efb9d9ee | 486 | |
4ee9c684 | 487 | fdump- |
488 | Common Joined RejectNegative | |
489 | -fdump-<type> Dump various compiler internals to a file | |
490 | ||
71278019 | 491 | fdump-final-insns= |
492 | Common RejectNegative Joined Var(flag_dump_final_insns) | |
493 | -fdump-final-insns=filename Dump to filename the insns at the end of translation | |
494 | ||
969239ad | 495 | fdump-noaddr |
496 | Common Report Var(flag_dump_noaddr) | |
497 | Suppress output of addresses in debugging dumps | |
498 | ||
ecdb6d1a | 499 | fdump-unnumbered |
2e9da478 | 500 | Common Report Var(flag_dump_unnumbered) VarExists |
969239ad | 501 | Suppress output of instruction numbers, line number notes and addresses in debugging dumps |
ecdb6d1a | 502 | |
0a59e439 | 503 | fdump-unnumbered-links |
504 | Common Report Var(flag_dump_unnumbered_links) VarExists | |
505 | Suppress output of previous and next insn numbers in debugging dumps | |
506 | ||
9845d120 | 507 | fdwarf2-cfi-asm |
508 | Common Report Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE) | |
509 | Enable CFI tables via GAS assembler directives. | |
510 | ||
f1aa280c | 511 | fearly-inlining |
87c75316 | 512 | Common Report Var(flag_early_inlining) Init(1) Optimization |
f1aa280c | 513 | Perform early inlining |
514 | ||
1e06725a | 515 | feliminate-dwarf2-dups |
2e9da478 | 516 | Common Report Var(flag_eliminate_dwarf2_dups) |
72528c71 | 517 | Perform DWARF2 duplicate elimination |
1e06725a | 518 | |
2f29eac3 | 519 | fipa-sra |
520 | Common Report Var(flag_ipa_sra) Init(0) Optimization | |
521 | Perform interprocedural reduction of aggregates | |
522 | ||
262444a6 | 523 | feliminate-unused-debug-symbols |
2e9da478 | 524 | Common Report Var(flag_debug_only_used_symbols) |
72528c71 | 525 | Perform unused type elimination in debug info |
262444a6 | 526 | |
1e06725a | 527 | feliminate-unused-debug-types |
2e9da478 | 528 | Common Report Var(flag_eliminate_unused_debug_types) Init(1) |
72528c71 | 529 | Perform unused type elimination in debug info |
1e06725a | 530 | |
0c573f98 | 531 | femit-class-debug-always |
fd5e1dfe | 532 | Common Report Var(flag_emit_class_debug_always) Init(0) |
0c573f98 | 533 | Do not suppress C++ class debug information. |
534 | ||
d907ec51 | 535 | fenable-icf-debug |
536 | Common Report Var(flag_enable_icf_debug) | |
537 | Generate debug information to support Identical Code Folding (ICF) | |
538 | ||
ecdb6d1a | 539 | fexceptions |
87c75316 | 540 | Common Report Var(flag_exceptions) Optimization |
72528c71 | 541 | Enable exception handling |
ecdb6d1a | 542 | |
1e06725a | 543 | fexpensive-optimizations |
87c75316 | 544 | Common Report Var(flag_expensive_optimizations) Optimization |
72528c71 | 545 | Perform a number of minor, expensive optimizations |
1e06725a | 546 | |
c6418a4e | 547 | fexcess-precision= |
548 | Common Joined RejectNegative | |
549 | -fexcess-precision=[fast|standard] Specify handling of excess floating-point precision | |
550 | ||
941a4893 | 551 | ffast-math |
552 | Common | |
553 | ||
ecdb6d1a | 554 | ffinite-math-only |
87c75316 | 555 | Common Report Var(flag_finite_math_only) Optimization |
72528c71 | 556 | Assume no NaNs or infinities are generated |
ecdb6d1a | 557 | |
941a4893 | 558 | ffixed- |
559 | Common Joined RejectNegative | |
53b8e5c1 | 560 | -ffixed-<register> Mark <register> as being unavailable to the compiler |
941a4893 | 561 | |
1e06725a | 562 | ffloat-store |
87c75316 | 563 | Common Report Var(flag_float_store) Optimization |
82a16202 | 564 | Don't allocate floats and doubles in extended-precision registers |
1e06725a | 565 | |
566 | fforce-addr | |
4d25f9eb | 567 | Common |
568 | Does nothing. Preserved for backward compatibility. | |
1e06725a | 569 | |
55d51835 | 570 | fforward-propagate |
571 | Common Report Var(flag_forward_propagate) Optimization | |
42a3a38b | 572 | Perform a forward propagation pass on RTL |
573 | ||
82a16202 | 574 | ; Nonzero means don't put addresses of constant functions in registers. |
575 | ; Used for compiling the Unix kernel, where strange substitutions are | |
576 | ; done on the assembly output. | |
1e06725a | 577 | ffunction-cse |
2e9da478 | 578 | Common Report Var(flag_no_function_cse,0) |
72528c71 | 579 | Allow function addresses to be held in registers |
1e06725a | 580 | |
ecdb6d1a | 581 | ffunction-sections |
2e9da478 | 582 | Common Report Var(flag_function_sections) |
72528c71 | 583 | Place each function into its own section |
ecdb6d1a | 584 | |
1e06725a | 585 | fgcse |
87c75316 | 586 | Common Report Var(flag_gcse) Optimization |
72528c71 | 587 | Perform global common subexpression elimination |
1e06725a | 588 | |
589 | fgcse-lm | |
87c75316 | 590 | Common Report Var(flag_gcse_lm) Init(1) Optimization |
72528c71 | 591 | Perform enhanced load motion during global common subexpression elimination |
1e06725a | 592 | |
593 | fgcse-sm | |
87c75316 | 594 | Common Report Var(flag_gcse_sm) Init(0) Optimization |
72528c71 | 595 | Perform store motion after global common subexpression elimination |
1e06725a | 596 | |
5c47e414 | 597 | fgcse-las |
87c75316 | 598 | Common Report Var(flag_gcse_las) Init(0) Optimization |
839f8415 | 599 | Perform redundant load after store elimination in global common subexpression |
600 | elimination | |
601 | ||
602 | fgcse-after-reload | |
87c75316 | 603 | Common Report Var(flag_gcse_after_reload) Optimization |
839f8415 | 604 | Perform global common subexpression elimination after register allocation |
3284a242 | 605 | has finished |
5c47e414 | 606 | |
d3399492 | 607 | ; This option is not documented yet as its semantics will change. |
255b6be7 | 608 | fgraphite |
609 | Common Report Var(flag_graphite) | |
610 | Enable in and out of Graphite representation | |
611 | ||
26c166eb | 612 | fgraphite-identity |
613 | Common Report Var(flag_graphite_identity) Optimization | |
614 | Enable Graphite Identity transformation | |
615 | ||
16848556 | 616 | floop-parallelize-all |
617 | Common Report Var(flag_loop_parallelize_all) Optimization | |
26c166eb | 618 | Mark all loops as parallel |
619 | ||
255b6be7 | 620 | floop-strip-mine |
621 | Common Report Var(flag_loop_strip_mine) Optimization | |
622 | Enable Loop Strip Mining transformation | |
623 | ||
624 | floop-interchange | |
625 | Common Report Var(flag_loop_interchange) Optimization | |
626 | Enable Loop Interchange transformation | |
627 | ||
628 | floop-block | |
629 | Common Report Var(flag_loop_block) Optimization | |
630 | Enable Loop Blocking transformation | |
631 | ||
a420d927 | 632 | fstrict-volatile-bitfields |
633 | Common Report Var(flag_strict_volatile_bitfields) Init(-1) | |
634 | Force bitfield accesses to match their type width | |
635 | ||
ecdb6d1a | 636 | fguess-branch-probability |
87c75316 | 637 | Common Report Var(flag_guess_branch_prob) Optimization |
72528c71 | 638 | Enable guessing of branch probabilities |
ecdb6d1a | 639 | |
82a16202 | 640 | ; Nonzero means ignore `#ident' directives. 0 means handle them. |
641 | ; Generate position-independent code for executables if possible | |
642 | ; On SVR4 targets, it also controls whether or not to emit a | |
643 | ; string identifying the compiler. | |
ecdb6d1a | 644 | fident |
2e9da478 | 645 | Common Report Var(flag_no_ident,0) |
72528c71 | 646 | Process #ident directives |
ecdb6d1a | 647 | |
1e06725a | 648 | fif-conversion |
87c75316 | 649 | Common Report Var(flag_if_conversion) Optimization |
72528c71 | 650 | Perform conversion of conditional jumps to branchless equivalents |
1e06725a | 651 | |
652 | fif-conversion2 | |
87c75316 | 653 | Common Report Var(flag_if_conversion2) Optimization |
72528c71 | 654 | Perform conversion of conditional jumps to conditional execution |
1e06725a | 655 | |
82a16202 | 656 | ; -finhibit-size-directive inhibits output of .size for ELF. |
657 | ; This is used only for compiling crtstuff.c, | |
658 | ; and it may be extended to other effects | |
659 | ; needed for crtstuff.c on other systems. | |
ecdb6d1a | 660 | finhibit-size-directive |
2e9da478 | 661 | Common Report Var(flag_inhibit_size_directive) |
72528c71 | 662 | Do not generate .size directives |
ecdb6d1a | 663 | |
f8daee9b | 664 | findirect-inlining |
665 | Common Report Var(flag_indirect_inlining) | |
666 | Perform indirect inlining | |
667 | ||
82a16202 | 668 | ; Nonzero means that functions declared `inline' will be treated |
669 | ; as `static'. Prevents generation of zillions of copies of unused | |
670 | ; static inline functions; instead, `inlines' are written out | |
671 | ; only when actually used. Used in conjunction with -g. Also | |
672 | ; does the right thing with #pragma interface. | |
1e06725a | 673 | finline |
1c2f0012 | 674 | Common Report Var(flag_no_inline,0) Init(0) |
72528c71 | 675 | Pay attention to the \"inline\" keyword |
1e06725a | 676 | |
b97510b2 | 677 | finline-small-functions |
678 | Common Report Var(flag_inline_small_functions) Optimization | |
679 | Integrate simple functions into their callers when code size is known to not growth | |
680 | ||
1e06725a | 681 | finline-functions |
87c75316 | 682 | Common Report Var(flag_inline_functions) Optimization |
72528c71 | 683 | Integrate simple functions into their callers |
1e06725a | 684 | |
f1aa280c | 685 | finline-functions-called-once |
87c75316 | 686 | Common Report Var(flag_inline_functions_called_once) Init(1) Optimization |
f1aa280c | 687 | Integrate functions called once into their callers |
9e0baf4d | 688 | |
39470ac3 | 689 | finline-limit- |
690 | Common RejectNegative Joined UInteger | |
691 | ||
692 | finline-limit= | |
693 | Common RejectNegative Joined UInteger | |
53b8e5c1 | 694 | -finline-limit=<number> Limit the size of inlined functions to <number> |
39470ac3 | 695 | |
ecdb6d1a | 696 | finstrument-functions |
2e9da478 | 697 | Common Report Var(flag_instrument_function_entry_exit) |
72528c71 | 698 | Instrument function entry and exit with profiling calls |
ecdb6d1a | 699 | |
a95c0776 | 700 | finstrument-functions-exclude-function-list= |
701 | Common RejectNegative Joined | |
702 | -finstrument-functions-exclude-function-list=name,... Do not instrument listed functions | |
703 | ||
704 | finstrument-functions-exclude-file-list= | |
705 | Common RejectNegative Joined | |
706 | -finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files | |
707 | ||
a17a73c7 | 708 | fipa-cp |
87c75316 | 709 | Common Report Var(flag_ipa_cp) Optimization |
a17a73c7 | 710 | Perform Interprocedural constant propagation |
711 | ||
2a15795f | 712 | fipa-cp-clone |
713 | Common Report Var(flag_ipa_cp_clone) Optimization | |
714 | Perform cloning to make Interprocedural constant propagation stronger | |
715 | ||
4e2db0ad | 716 | fipa-profile |
717 | Common Report Var(flag_ipa_profile) Init(0) Optimization | |
718 | Perform interprocedural profile propagation | |
f7d118a9 | 719 | |
bdf4f142 | 720 | fipa-pta |
87c75316 | 721 | Common Report Var(flag_ipa_pta) Init(0) Optimization |
bdf4f142 | 722 | Perform interprocedural points-to analysis |
723 | ||
4e2db0ad | 724 | fipa-pure-const |
725 | Common Report Var(flag_ipa_pure_const) Init(0) Optimization | |
726 | Discover pure and const functions | |
727 | ||
f7d118a9 | 728 | fipa-reference |
87c75316 | 729 | Common Report Var(flag_ipa_reference) Init(0) Optimization |
f7d118a9 | 730 | Discover readonly and non addressable static variables |
731 | ||
604cde73 | 732 | fipa-matrix-reorg |
76c71f34 | 733 | Common Report Var(flag_ipa_matrix_reorg) Optimization |
604cde73 | 734 | Perform matrix layout flattening and transposing based |
735 | on profiling information. | |
736 | ||
f27ac341 | 737 | fipa-struct-reorg |
738 | Common Report Var(flag_ipa_struct_reorg) | |
739 | Perform structure layout optimizations based | |
740 | on profiling information. | |
741 | ||
47dd2e78 | 742 | fira-algorithm= |
743 | Common Joined RejectNegative | |
14792f4e | 744 | -fira-algorithm=[CB|priority] Set the used IRA algorithm |
745 | ||
746 | fira-region= | |
747 | Common Joined RejectNegative | |
748 | -fira-region=[one|all|mixed] Set regions for IRA | |
47dd2e78 | 749 | |
750 | fira-coalesce | |
751 | Common Report Var(flag_ira_coalesce) Init(0) | |
752 | Do optimistic coalescing. | |
753 | ||
e8eed2f8 | 754 | fira-loop-pressure |
755 | Common Report Var(flag_ira_loop_pressure) | |
756 | Use IRA based register pressure calculation | |
757 | in RTL loop optimizations. | |
758 | ||
47dd2e78 | 759 | fira-share-save-slots |
760 | Common Report Var(flag_ira_share_save_slots) Init(1) | |
761 | Share slots for saving different hard registers. | |
762 | ||
763 | fira-share-spill-slots | |
764 | Common Report Var(flag_ira_share_spill_slots) Init(1) | |
765 | Share stack slots for spilled pseudo-registers. | |
766 | ||
767 | fira-verbose= | |
4aafe913 | 768 | Common RejectNegative Joined UInteger Var(flag_ira_verbose) Init(5) |
cf210371 | 769 | -fira-verbose=<number> Control IRA's level of diagnostic messages. |
47dd2e78 | 770 | |
dec41e98 | 771 | fivopts |
87c75316 | 772 | Common Report Var(flag_ivopts) Init(1) Optimization |
dec41e98 | 773 | Optimize induction variables on trees |
774 | ||
51d8e657 | 775 | fjump-tables |
87c75316 | 776 | Common Var(flag_jump_tables) Init(1) Optimization |
51d8e657 | 777 | Use jump tables for sufficiently large switch statements |
778 | ||
1e06725a | 779 | fkeep-inline-functions |
2e9da478 | 780 | Common Report Var(flag_keep_inline_functions) |
72528c71 | 781 | Generate code for functions even if they are fully inlined |
1e06725a | 782 | |
783 | fkeep-static-consts | |
2e9da478 | 784 | Common Report Var(flag_keep_static_consts) Init(1) |
72528c71 | 785 | Emit static const variables even if they are not used |
1e06725a | 786 | |
ecdb6d1a | 787 | fleading-underscore |
2e9da478 | 788 | Common Report Var(flag_leading_underscore) Init(-1) |
72528c71 | 789 | Give external symbols a leading underscore |
ecdb6d1a | 790 | |
4f87b914 | 791 | floop-optimize |
792 | Common | |
334ec2d8 | 793 | Does nothing. Preserved for backward compatibility. |
4f87b914 | 794 | |
7bfefa9d | 795 | flto |
796 | Common Var(flag_lto) | |
797 | Enable link-time optimization. | |
798 | ||
799 | ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h. | |
800 | flto-compression-level= | |
212cc995 | 801 | Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1) |
cf210371 | 802 | -flto-compression-level=<number> Use zlib compression level <number> for IL |
7bfefa9d | 803 | |
804 | flto-report | |
805 | Common Report Var(flag_lto_report) Init(0) Optimization | |
806 | Report various link-time optimization statistics | |
807 | ||
ecdb6d1a | 808 | fmath-errno |
46f8e3b0 | 809 | Common Report Var(flag_errno_math) Init(1) Optimization |
72528c71 | 810 | Set errno after built-in math functions |
ecdb6d1a | 811 | |
812 | fmem-report | |
2e9da478 | 813 | Common Report Var(mem_report) |
72528c71 | 814 | Report on permanent memory allocation |
ecdb6d1a | 815 | |
82a16202 | 816 | ; This will attempt to merge constant section constants, if 1 only |
817 | ; string constants and constants from constant pool, if 2 also constant | |
818 | ; variables. | |
ecdb6d1a | 819 | fmerge-all-constants |
87c75316 | 820 | Common Report Var(flag_merge_constants,2) Init(1) Optimization |
72528c71 | 821 | Attempt to merge identical constants and constant variables |
ecdb6d1a | 822 | |
823 | fmerge-constants | |
87c75316 | 824 | Common Report Var(flag_merge_constants,1) VarExists Optimization |
72528c71 | 825 | Attempt to merge identical constants across compilation units |
ecdb6d1a | 826 | |
7765591b | 827 | fmerge-debug-strings |
828 | Common Report Var(flag_merge_debug_strings) Init(1) | |
829 | Attempt to merge identical debug strings across compilation units | |
830 | ||
1e06725a | 831 | fmessage-length= |
832 | Common RejectNegative Joined UInteger | |
53b8e5c1 | 833 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping |
1e06725a | 834 | |
406a73e7 | 835 | fmodulo-sched |
87c75316 | 836 | Common Report Var(flag_modulo_sched) Optimization |
406a73e7 | 837 | Perform SMS based modulo scheduling before the first scheduling pass |
838 | ||
3a943084 | 839 | fmodulo-sched-allow-regmoves |
840 | Common Report Var(flag_modulo_sched_allow_regmoves) | |
841 | Perform SMS based modulo scheduling with register moves allowed | |
842 | ||
3a0ecac2 | 843 | fmove-loop-invariants |
87c75316 | 844 | Common Report Var(flag_move_loop_invariants) Init(1) Optimization |
3a0ecac2 | 845 | Move loop invariant computations out of loops |
846 | ||
4ee9c684 | 847 | fmudflap |
2e9da478 | 848 | Common RejectNegative Report Var(flag_mudflap) |
3284a242 | 849 | Add mudflap bounds-checking instrumentation for single-threaded program |
4ee9c684 | 850 | |
851 | fmudflapth | |
c1d36cca | 852 | Common RejectNegative Report VarExists Var(flag_mudflap,2) |
3284a242 | 853 | Add mudflap bounds-checking instrumentation for multi-threaded program |
4ee9c684 | 854 | |
855 | fmudflapir | |
2e9da478 | 856 | Common RejectNegative Report Var(flag_mudflap_ignore_reads) |
3284a242 | 857 | Ignore read operations when inserting mudflap instrumentation |
4ee9c684 | 858 | |
3072d30e | 859 | fdce |
76c71f34 | 860 | Common Var(flag_dce) Init(1) Optimization |
3072d30e | 861 | Use the RTL dead code elimination pass |
862 | ||
863 | fdse | |
76c71f34 | 864 | Common Var(flag_dse) Init(1) Optimization |
3072d30e | 865 | Use the RTL dead store elimination pass |
866 | ||
f045d41d | 867 | freschedule-modulo-scheduled-loops |
87c75316 | 868 | Common Report Var(flag_resched_modulo_sched) Optimization |
f045d41d | 869 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling |
870 | ||
ecdb6d1a | 871 | fnon-call-exceptions |
87c75316 | 872 | Common Report Var(flag_non_call_exceptions) Optimization |
72528c71 | 873 | Support synchronous non-call exceptions |
ecdb6d1a | 874 | |
1e06725a | 875 | fomit-frame-pointer |
87c75316 | 876 | Common Report Var(flag_omit_frame_pointer) Optimization |
72528c71 | 877 | When possible do not generate stack frames |
1e06725a | 878 | |
ecdb6d1a | 879 | foptimize-register-move |
87c75316 | 880 | Common Report Var(flag_regmove) Optimization |
72528c71 | 881 | Do the full register move optimization pass |
ecdb6d1a | 882 | |
1e06725a | 883 | foptimize-sibling-calls |
87c75316 | 884 | Common Report Var(flag_optimize_sibling_calls) Optimization |
72528c71 | 885 | Optimize sibling and tail recursive calls |
1e06725a | 886 | |
51949610 | 887 | fpre-ipa-mem-report |
888 | Common Report Var(pre_ipa_mem_report) | |
889 | Report on memory allocation before interprocedural optimization | |
890 | ||
891 | fpost-ipa-mem-report | |
892 | Common Report Var(post_ipa_mem_report) | |
893 | Report on memory allocation before interprocedural optimization | |
894 | ||
ecdb6d1a | 895 | fpack-struct |
87c75316 | 896 | Common Report Var(flag_pack_struct) Optimization |
72528c71 | 897 | Pack structure members together without holes |
ecdb6d1a | 898 | |
6b5553e5 | 899 | fpack-struct= |
87c75316 | 900 | Common RejectNegative Joined UInteger Optimization |
6b5553e5 | 901 | -fpack-struct=<number> Set initial maximum structure member alignment |
902 | ||
1e06725a | 903 | fpcc-struct-return |
4aafe913 | 904 | Common Report Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN) |
72528c71 | 905 | Return small aggregates in memory, not registers |
1e06725a | 906 | |
907 | fpeel-loops | |
87c75316 | 908 | Common Report Var(flag_peel_loops) Optimization |
72528c71 | 909 | Perform loop peeling |
1e06725a | 910 | |
911 | fpeephole | |
87c75316 | 912 | Common Report Var(flag_no_peephole,0) Optimization |
72528c71 | 913 | Enable machine specific peephole optimizations |
1e06725a | 914 | |
ecdb6d1a | 915 | fpeephole2 |
87c75316 | 916 | Common Report Var(flag_peephole2) Optimization |
72528c71 | 917 | Enable an RTL peephole pass before sched2 |
ecdb6d1a | 918 | |
82a16202 | 919 | fPIC |
920 | Common Report Var(flag_pic,2) | |
921 | Generate position-independent code if possible (large mode) | |
922 | ||
923 | fPIE | |
924 | Common Report Var(flag_pie,2) | |
925 | Generate position-independent code for executables if possible (large mode) | |
926 | ||
ecdb6d1a | 927 | fpic |
2e9da478 | 928 | Common Report Var(flag_pic,1) VarExists |
82a16202 | 929 | Generate position-independent code if possible (small mode) |
ecdb6d1a | 930 | |
931 | fpie | |
2e9da478 | 932 | Common Report Var(flag_pie,1) VarExists |
82a16202 | 933 | Generate position-independent code for executables if possible (small mode) |
ecdb6d1a | 934 | |
9227b6fc | 935 | fplugin= |
936 | Common Joined RejectNegative | |
937 | Specify a plugin to load | |
938 | ||
939 | fplugin-arg- | |
940 | Common Joined RejectNegative | |
cf210371 | 941 | -fplugin-arg-<name>-<key>[=<value>] Specify argument <key>=<value> for plugin <name> |
9227b6fc | 942 | |
ad4a85ad | 943 | fpredictive-commoning |
76c71f34 | 944 | Common Report Var(flag_predictive_commoning) Optimization |
ad4a85ad | 945 | Run predictive commoning optimization. |
946 | ||
1e06725a | 947 | fprefetch-loop-arrays |
87c75316 | 948 | Common Report Var(flag_prefetch_loop_arrays) Optimization |
72528c71 | 949 | Generate prefetch instructions, if available, for arrays in loops |
1e06725a | 950 | |
ecdb6d1a | 951 | fprofile |
2e9da478 | 952 | Common Report Var(profile_flag) |
72528c71 | 953 | Enable basic program profiling code |
ecdb6d1a | 954 | |
955 | fprofile-arcs | |
2e9da478 | 956 | Common Report Var(profile_arc_flag) |
72528c71 | 957 | Insert arc-based program profiling code |
ecdb6d1a | 958 | |
3e3a0e9c | 959 | fprofile-dir= |
960 | Common Joined RejectNegative | |
961 | Set the top-level directory for storing the profile data. | |
962 | The default is 'pwd'. | |
963 | ||
e0dc6f2b | 964 | fprofile-correction |
965 | Common Report Var(flag_profile_correction) | |
966 | Enable correction of flow inconsistent profile data input | |
967 | ||
7dea76ba | 968 | fprofile-generate |
969 | Common | |
970 | Enable common options for generating profile info for profile feedback directed optimizations | |
971 | ||
3e3a0e9c | 972 | fprofile-generate= |
973 | Common Joined RejectNegative | |
974 | Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir= | |
975 | ||
7dea76ba | 976 | fprofile-use |
3e3a0e9c | 977 | Common Var(flag_profile_use) |
7dea76ba | 978 | Enable common options for performing profile feedback directed optimizations |
979 | ||
3e3a0e9c | 980 | fprofile-use= |
981 | Common Joined RejectNegative | |
982 | Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir= | |
983 | ||
1c6a7b8c | 984 | fprofile-values |
2e9da478 | 985 | Common Report Var(flag_profile_values) |
1c6a7b8c | 986 | Insert code to profile values of expressions |
987 | ||
1e06725a | 988 | frandom-seed |
989 | Common | |
990 | ||
991 | frandom-seed= | |
992 | Common Joined RejectNegative | |
53b8e5c1 | 993 | -frandom-seed=<string> Make compile reproducible using <string> |
1e06725a | 994 | |
7c6733e8 | 995 | ; This switch causes the command line that was used to create an |
996 | ; object file to be recorded into the object file. The exact format | |
997 | ; of this recording is target and binary file format dependent. | |
998 | ; It is related to the -fverbose-asm switch, but that switch only | |
999 | ; records information in the assembler output file as comments, so | |
1000 | ; they never reach the object file. | |
1001 | frecord-gcc-switches | |
1002 | Common Report Var(flag_record_gcc_switches) | |
1003 | Record gcc command line switches in the object file. | |
1004 | ||
1e06725a | 1005 | freg-struct-return |
87c75316 | 1006 | Common Report Var(flag_pcc_struct_return,0) VarExists Optimization |
72528c71 | 1007 | Return small aggregates in registers |
1e06725a | 1008 | |
ecdb6d1a | 1009 | fregmove |
87c75316 | 1010 | Common Report Var(flag_regmove) Optimization |
72528c71 | 1011 | Enables a register move optimization |
ecdb6d1a | 1012 | |
1013 | frename-registers | |
87c75316 | 1014 | Common Report Var(flag_rename_registers) Init(2) Optimization |
72528c71 | 1015 | Perform a register renaming optimization pass |
ecdb6d1a | 1016 | |
1017 | freorder-blocks | |
87c75316 | 1018 | Common Report Var(flag_reorder_blocks) Optimization |
72528c71 | 1019 | Reorder basic blocks to improve code placement |
ecdb6d1a | 1020 | |
4f18499c | 1021 | freorder-blocks-and-partition |
87c75316 | 1022 | Common Report Var(flag_reorder_blocks_and_partition) Optimization |
4f18499c | 1023 | Reorder basic blocks and partition into hot and cold sections |
1024 | ||
ecdb6d1a | 1025 | freorder-functions |
87c75316 | 1026 | Common Report Var(flag_reorder_functions) Optimization |
72528c71 | 1027 | Reorder functions to improve code placement |
ecdb6d1a | 1028 | |
1e06725a | 1029 | frerun-cse-after-loop |
87c75316 | 1030 | Common Report Var(flag_rerun_cse_after_loop) Init(2) Optimization |
72528c71 | 1031 | Add a common subexpression elimination pass after loop optimizations |
1e06725a | 1032 | |
4f87b914 | 1033 | frerun-loop-opt |
1034 | Common | |
334ec2d8 | 1035 | Does nothing. Preserved for backward compatibility. |
4f87b914 | 1036 | |
5466f589 | 1037 | frounding-math |
87c75316 | 1038 | Common Report Var(flag_rounding_math) Optimization |
5466f589 | 1039 | Disable optimizations that assume default FP rounding behavior |
1040 | ||
ecdb6d1a | 1041 | fsched-interblock |
87c75316 | 1042 | Common Report Var(flag_schedule_interblock) Init(1) Optimization |
72528c71 | 1043 | Enable scheduling across basic blocks |
ecdb6d1a | 1044 | |
a7dcf969 | 1045 | fsched-pressure |
1046 | Common Report Var(flag_sched_pressure) Init(0) Optimization | |
1047 | Enable register pressure sensitive insn scheduling | |
1048 | ||
ecdb6d1a | 1049 | fsched-spec |
87c75316 | 1050 | Common Report Var(flag_schedule_speculative) Init(1) Optimization |
72528c71 | 1051 | Allow speculative motion of non-loads |
ecdb6d1a | 1052 | |
1053 | fsched-spec-load | |
87c75316 | 1054 | Common Report Var(flag_schedule_speculative_load) Optimization |
72528c71 | 1055 | Allow speculative motion of some loads |
ecdb6d1a | 1056 | |
1057 | fsched-spec-load-dangerous | |
87c75316 | 1058 | Common Report Var(flag_schedule_speculative_load_dangerous) Optimization |
72528c71 | 1059 | Allow speculative motion of more loads |
ecdb6d1a | 1060 | |
1e06725a | 1061 | fsched-verbose= |
1062 | Common RejectNegative Joined | |
53b8e5c1 | 1063 | -fsched-verbose=<number> Set the verbosity level of the scheduler |
1e06725a | 1064 | |
ecdb6d1a | 1065 | fsched2-use-superblocks |
87c75316 | 1066 | Common Report Var(flag_sched2_use_superblocks) Optimization |
72528c71 | 1067 | If scheduling post reload, do superblock scheduling |
ecdb6d1a | 1068 | |
1069 | fsched2-use-traces | |
fda153ea | 1070 | Common |
1071 | Does nothing. Preserved for backward compatibility. | |
ecdb6d1a | 1072 | |
1e06725a | 1073 | fschedule-insns |
87c75316 | 1074 | Common Report Var(flag_schedule_insns) Optimization |
72528c71 | 1075 | Reschedule instructions before register allocation |
1e06725a | 1076 | |
1077 | fschedule-insns2 | |
87c75316 | 1078 | Common Report Var(flag_schedule_insns_after_reload) Optimization |
72528c71 | 1079 | Reschedule instructions after register allocation |
1e06725a | 1080 | |
e1ab7874 | 1081 | ; This flag should be on when a target implements non-trivial |
1082 | ; scheduling hooks, maybe saving some information for its own sake. | |
1083 | ; On IA64, for example, this is used for correct bundling. | |
1084 | fselective-scheduling | |
1085 | Common Report Var(flag_selective_scheduling) Optimization | |
1086 | Schedule instructions using selective scheduling algorithm | |
1087 | ||
1088 | fselective-scheduling2 | |
1089 | Common Report Var(flag_selective_scheduling2) Optimization | |
1090 | Run selective scheduling after reload | |
1091 | ||
1092 | fsel-sched-pipelining | |
1093 | Common Report Var(flag_sel_sched_pipelining) Init(0) Optimization | |
1094 | Perform software pipelining of inner loops during selective scheduling | |
1095 | ||
1096 | fsel-sched-pipelining-outer-loops | |
1097 | Common Report Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization | |
1098 | Perform software pipelining of outer loops during selective scheduling | |
1099 | ||
1100 | fsel-sched-reschedule-pipelined | |
1101 | Common Report Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization | |
1102 | Reschedule pipelined regions without pipelining | |
1103 | ||
82a16202 | 1104 | ; sched_stalled_insns means that insns can be moved prematurely from the queue |
1105 | ; of stalled insns into the ready list. | |
52c4b43f | 1106 | fsched-stalled-insns |
46f8e3b0 | 1107 | Common Report Var(flag_sched_stalled_insns) Optimization UInteger |
52c4b43f | 1108 | Allow premature scheduling of queued insns |
1109 | ||
1110 | fsched-stalled-insns= | |
a0c938f0 | 1111 | Common RejectNegative Joined UInteger |
98b93ebb | 1112 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled |
52c4b43f | 1113 | |
82a16202 | 1114 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will |
1115 | ; be examined for a dependency on a stalled insn that is candidate for | |
1116 | ; premature removal from the queue of stalled insns into the ready list (has | |
1117 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
52c4b43f | 1118 | fsched-stalled-insns-dep |
46f8e3b0 | 1119 | Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger |
52c4b43f | 1120 | Set dependence distance checking in premature scheduling of queued insns |
1121 | ||
1122 | fsched-stalled-insns-dep= | |
1123 | Common RejectNegative Joined UInteger | |
98b93ebb | 1124 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns |
52c4b43f | 1125 | |
4d569386 | 1126 | fsched-group-heuristic |
1127 | Common Report Var(flag_sched_group_heuristic) Init(1) Optimization | |
1128 | Enable the group heuristic in the scheduler | |
1129 | ||
1130 | fsched-critical-path-heuristic | |
1131 | Common Report Var(flag_sched_critical_path_heuristic) Init(1) Optimization | |
1132 | Enable the critical path heuristic in the scheduler | |
1133 | ||
1134 | fsched-spec-insn-heuristic | |
1135 | Common Report Var(flag_sched_spec_insn_heuristic) Init(1) Optimization | |
1136 | Enable the speculative instruction heuristic in the scheduler | |
1137 | ||
4d569386 | 1138 | fsched-rank-heuristic |
1139 | Common Report Var(flag_sched_rank_heuristic) Init(1) Optimization | |
1140 | Enable the rank heuristic in the scheduler | |
1141 | ||
1142 | fsched-last-insn-heuristic | |
1143 | Common Report Var(flag_sched_last_insn_heuristic) Init(1) Optimization | |
1144 | Enable the last instruction heuristic in the scheduler | |
1145 | ||
1146 | fsched-dep-count-heuristic | |
1147 | Common Report Var(flag_sched_dep_count_heuristic) Init(1) Optimization | |
1148 | Enable the dependent count heuristic in the scheduler | |
1149 | ||
f2d0e9f1 | 1150 | fsection-anchors |
87c75316 | 1151 | Common Report Var(flag_section_anchors) Optimization |
f2d0e9f1 | 1152 | Access data in the same section from shared anchor points |
1153 | ||
2b74c150 | 1154 | fsee |
1bc99153 | 1155 | Common |
1156 | Does nothing. Preserved for backward compatibility. | |
2b74c150 | 1157 | |
a5b022e7 | 1158 | fzee |
1159 | Common Report Var(flag_zee) Init(0) | |
1160 | Eliminate redundant zero extensions on targets that support implicit extensions. | |
1161 | ||
5fd4bf3b | 1162 | fshow-column |
abf6a617 | 1163 | Common Report Var(flag_show_column) Init(1) |
b559b9e2 | 1164 | Show column numbers in diagnostics, when available. Default on |
5fd4bf3b | 1165 | |
ecdb6d1a | 1166 | fsignaling-nans |
87c75316 | 1167 | Common Report Var(flag_signaling_nans) Optimization |
72528c71 | 1168 | Disable optimizations observable by IEEE signaling NaNs |
ecdb6d1a | 1169 | |
893038cd | 1170 | fsigned-zeros |
e8831472 | 1171 | Common Report Var(flag_signed_zeros) Init(1) Optimization |
893038cd | 1172 | Disable floating point optimizations that ignore the IEEE signedness of zero |
1173 | ||
ecdb6d1a | 1174 | fsingle-precision-constant |
87c75316 | 1175 | Common Report Var(flag_single_precision_constant) Optimization |
72528c71 | 1176 | Convert floating point constants to single precision constants |
ecdb6d1a | 1177 | |
a9989fb4 | 1178 | fsplit-ivs-in-unroller |
87c75316 | 1179 | Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization |
3284a242 | 1180 | Split lifetimes of induction variables when loops are unrolled |
a9989fb4 | 1181 | |
1a6a0f2a | 1182 | fsplit-wide-types |
e8831472 | 1183 | Common Report Var(flag_split_wide_types) Optimization |
1a6a0f2a | 1184 | Split wide types into independent registers |
1185 | ||
375bb675 | 1186 | fvariable-expansion-in-unroller |
87c75316 | 1187 | Common Report Var(flag_variable_expansion_in_unroller) Optimization |
3284a242 | 1188 | Apply variable expansion when loops are unrolled |
375bb675 | 1189 | |
4852b829 | 1190 | fstack-check= |
1191 | Common Report RejectNegative Joined | |
1192 | -fstack-check=[no|generic|specific] Insert stack checking code into the program | |
1193 | ||
ecdb6d1a | 1194 | fstack-check |
4852b829 | 1195 | Common Report |
1196 | Insert stack checking code into the program. Same as -fstack-check=specific | |
ecdb6d1a | 1197 | |
1e06725a | 1198 | fstack-limit |
1199 | Common | |
1200 | ||
941a4893 | 1201 | fstack-limit-register= |
1202 | Common RejectNegative Joined | |
53b8e5c1 | 1203 | -fstack-limit-register=<register> Trap if the stack goes past <register> |
941a4893 | 1204 | |
1205 | fstack-limit-symbol= | |
1206 | Common RejectNegative Joined | |
53b8e5c1 | 1207 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name> |
941a4893 | 1208 | |
f1a0edff | 1209 | fstack-protector |
1210 | Common Report Var(flag_stack_protect, 1) | |
1211 | Use propolice as a stack protection method | |
1212 | ||
1213 | fstack-protector-all | |
1214 | Common Report RejectNegative Var(flag_stack_protect, 2) VarExists | |
1215 | Use a stack protection method for every function | |
1216 | ||
1e06725a | 1217 | fstrength-reduce |
4f87b914 | 1218 | Common |
334ec2d8 | 1219 | Does nothing. Preserved for backward compatibility. |
1e06725a | 1220 | |
82a16202 | 1221 | ; Nonzero if we should do (language-dependent) alias analysis. |
1222 | ; Typically, this analysis will assume that expressions of certain | |
1223 | ; types do not alias expressions of certain other types. Only used | |
1224 | ; if alias analysis (in general) is enabled. | |
ecdb6d1a | 1225 | fstrict-aliasing |
87c75316 | 1226 | Common Report Var(flag_strict_aliasing) Optimization |
72528c71 | 1227 | Assume strict aliasing rules apply |
ecdb6d1a | 1228 | |
981eb798 | 1229 | fstrict-overflow |
1230 | Common Report Var(flag_strict_overflow) | |
1231 | Treat signed overflow as undefined | |
1232 | ||
1e06725a | 1233 | fsyntax-only |
2e9da478 | 1234 | Common Report Var(flag_syntax_only) |
72528c71 | 1235 | Check for syntax errors, then stop |
1e06725a | 1236 | |
ecdb6d1a | 1237 | ftest-coverage |
2e9da478 | 1238 | Common Report Var(flag_test_coverage) |
72528c71 | 1239 | Create data files needed by \"gcov\" |
ecdb6d1a | 1240 | |
1e06725a | 1241 | fthread-jumps |
87c75316 | 1242 | Common Report Var(flag_thread_jumps) Optimization |
72528c71 | 1243 | Perform jump threading optimizations |
1e06725a | 1244 | |
ecdb6d1a | 1245 | ftime-report |
2e9da478 | 1246 | Common Report Var(time_report) |
72528c71 | 1247 | Report the time taken by each compiler pass |
ecdb6d1a | 1248 | |
941a4893 | 1249 | ftls-model= |
1250 | Common Joined RejectNegative | |
53b8e5c1 | 1251 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model |
941a4893 | 1252 | |
56af936e | 1253 | ftoplevel-reorder |
8188ae06 | 1254 | Common Report Var(flag_toplevel_reorder) Init(2) Optimization |
56af936e | 1255 | Reorder top level functions, variables, and asms |
1256 | ||
1e06725a | 1257 | ftracer |
2e9da478 | 1258 | Common Report Var(flag_tracer) |
72528c71 | 1259 | Perform superblock formation via tail duplication |
1e06725a | 1260 | |
82a16202 | 1261 | ; Zero means that floating-point math operations cannot generate a |
1262 | ; (user-visible) trap. This is the case, for example, in nonstop | |
1263 | ; IEEE 754 arithmetic. | |
ecdb6d1a | 1264 | ftrapping-math |
87c75316 | 1265 | Common Report Var(flag_trapping_math) Init(1) Optimization |
72528c71 | 1266 | Assume floating-point operations can trap |
ecdb6d1a | 1267 | |
1268 | ftrapv | |
87c75316 | 1269 | Common Report Var(flag_trapv) Optimization |
72528c71 | 1270 | Trap for signed overflow in addition, subtraction and multiplication |
ecdb6d1a | 1271 | |
4ee9c684 | 1272 | ftree-ccp |
87c75316 | 1273 | Common Report Var(flag_tree_ccp) Optimization |
4ee9c684 | 1274 | Enable SSA-CCP optimization on trees |
1275 | ||
88dbf20f | 1276 | ftree-store-ccp |
61207d43 | 1277 | Common |
1278 | Does nothing. Preserved for backward compatibility. | |
88dbf20f | 1279 | |
4ee9c684 | 1280 | ftree-ch |
87c75316 | 1281 | Common Report Var(flag_tree_ch) Optimization |
4ee9c684 | 1282 | Enable loop header copying on trees |
1283 | ||
4ee9c684 | 1284 | ftree-copyrename |
87c75316 | 1285 | Common Report Var(flag_tree_copyrename) Optimization |
3284a242 | 1286 | Replace SSA temporaries with better names in copies |
4ee9c684 | 1287 | |
88dbf20f | 1288 | ftree-copy-prop |
87c75316 | 1289 | Common Report Var(flag_tree_copy_prop) Optimization |
88dbf20f | 1290 | Enable copy propagation on trees |
1291 | ||
1292 | ftree-store-copy-prop | |
317d3b82 | 1293 | Common |
578ef723 | 1294 | Does nothing. Preserved for backward compatibility. |
88dbf20f | 1295 | |
e6d0e152 | 1296 | ftree-cselim |
1297 | Common Report Var(flag_tree_cselim) Init(2) Optimization | |
1298 | Transform condition stores into unconditional ones | |
1299 | ||
a347af29 | 1300 | ftree-switch-conversion |
1301 | Common Report Var(flag_tree_switch_conversion) Optimization | |
1302 | Perform conversions of switch initializations. | |
1303 | ||
4ee9c684 | 1304 | ftree-dce |
87c75316 | 1305 | Common Report Var(flag_tree_dce) Optimization |
4ee9c684 | 1306 | Enable SSA dead code elimination optimization on trees |
1307 | ||
1308 | ftree-dominator-opts | |
87c75316 | 1309 | Common Report Var(flag_tree_dom) Optimization |
4ee9c684 | 1310 | Enable dominator optimizations |
1311 | ||
1312 | ftree-dse | |
87c75316 | 1313 | Common Report Var(flag_tree_dse) Optimization |
4ee9c684 | 1314 | Enable dead store elimination |
1315 | ||
408c3c77 | 1316 | ftree-forwprop |
1317 | Common Report Var(flag_tree_forwprop) Init(1) Optimization | |
1318 | Enable forward propagation on trees | |
1319 | ||
591c2a30 | 1320 | ftree-fre |
87c75316 | 1321 | Common Report Var(flag_tree_fre) Optimization |
591c2a30 | 1322 | Enable Full Redundancy Elimination (FRE) on trees |
1323 | ||
801c5610 | 1324 | ftree-loop-distribution |
2b945500 | 1325 | Common Report Var(flag_tree_loop_distribution) Optimization |
801c5610 | 1326 | Enable loop distribution on trees |
1327 | ||
41b5cc78 | 1328 | ftree-loop-im |
87c75316 | 1329 | Common Report Var(flag_tree_loop_im) Init(1) Optimization |
7d23383d | 1330 | Enable loop invariant motion on trees |
1331 | ||
60cfcb79 | 1332 | ftree-loop-linear |
87c75316 | 1333 | Common Report Var(flag_tree_loop_linear) Optimization |
60cfcb79 | 1334 | Enable linear loop transforms on trees |
1335 | ||
41b5cc78 | 1336 | ftree-loop-ivcanon |
87c75316 | 1337 | Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization |
41b5cc78 | 1338 | Create canonical induction variables in loops |
1339 | ||
dcb9eccb | 1340 | ftree-loop-optimize |
87c75316 | 1341 | Common Report Var(flag_tree_loop_optimize) Init(1) Optimization |
dcb9eccb | 1342 | Enable loop optimizations on tree level |
1343 | ||
28c92cbb | 1344 | ftree-parallelize-loops= |
212cc995 | 1345 | Common Report Joined RejectNegative UInteger Var(flag_tree_parallelize_loops) Init(1) |
28c92cbb | 1346 | Enable automatic parallelization of loops |
1347 | ||
408c3c77 | 1348 | ftree-phiprop |
1349 | Common Report Var(flag_tree_phiprop) Init(1) Optimization | |
1350 | Enable hoisting loads from conditional pointers. | |
1351 | ||
4ee9c684 | 1352 | ftree-pre |
87c75316 | 1353 | Common Report Var(flag_tree_pre) Optimization |
4ee9c684 | 1354 | Enable SSA-PRE optimization on trees |
1355 | ||
408c3c77 | 1356 | ftree-pta |
1357 | Common Report Var(flag_tree_pta) Init(1) Optimization | |
1358 | Perform function-local points-to analysis on trees. | |
1359 | ||
621a93b1 | 1360 | ftree-reassoc |
1361 | Common Report Var(flag_tree_reassoc) Init(1) Optimization | |
1362 | Enable reassociation on tree level | |
1363 | ||
2be14d8b | 1364 | ftree-salias |
70393469 | 1365 | Common |
1366 | Does nothing. Preserved for backward compatibility. | |
2be14d8b | 1367 | |
5e733b02 | 1368 | ftree-sink |
87c75316 | 1369 | Common Report Var(flag_tree_sink) Optimization |
5e733b02 | 1370 | Enable SSA code sinking on trees |
1371 | ||
4ee9c684 | 1372 | ftree-sra |
87c75316 | 1373 | Common Report Var(flag_tree_sra) Optimization |
4ee9c684 | 1374 | Perform scalar replacement of aggregates |
1375 | ||
1376 | ftree-ter | |
bff4202c | 1377 | Common Report Var(flag_tree_ter) Init(1) Optimization |
4ee9c684 | 1378 | Replace temporary expressions in the SSA->normal pass |
1379 | ||
87c75316 | 1380 | ftree-lrs |
1381 | Common Report Var(flag_tree_live_range_split) Optimization | |
1382 | Perform live range splitting during the SSA->normal pass | |
1383 | ||
88dbf20f | 1384 | ftree-vrp |
87c75316 | 1385 | Common Report Var(flag_tree_vrp) Init(0) Optimization |
88dbf20f | 1386 | Perform Value Range Propagation on trees |
1387 | ||
1e06725a | 1388 | funit-at-a-time |
8188ae06 | 1389 | Common Report Var(flag_unit_at_a_time) Init(1) Optimization |
72528c71 | 1390 | Compile whole compilation unit at a time |
1e06725a | 1391 | |
1392 | funroll-loops | |
87c75316 | 1393 | Common Report Var(flag_unroll_loops) Optimization |
72528c71 | 1394 | Perform loop unrolling when iteration count is known |
1e06725a | 1395 | |
1396 | funroll-all-loops | |
87c75316 | 1397 | Common Report Var(flag_unroll_all_loops) Optimization |
72528c71 | 1398 | Perform loop unrolling for all loops |
1e06725a | 1399 | |
7e3cc681 | 1400 | ; Nonzero means that loop optimizer may assume that the induction variables |
1401 | ; that control loops do not overflow and that the loops with nontrivial | |
1402 | ; exit condition are not infinite | |
1403 | funsafe-loop-optimizations | |
87c75316 | 1404 | Common Report Var(flag_unsafe_loop_optimizations) Optimization |
7e3cc681 | 1405 | Allow loop optimizations to assume that the loops behave in normal way |
1406 | ||
49d060d7 | 1407 | fassociative-math |
1408 | Common Report Var(flag_associative_math) | |
1409 | Allow optimization for floating-point arithmetic which may change the | |
1410 | result of the operation due to rounding. | |
1411 | ||
1412 | freciprocal-math | |
1413 | Common Report Var(flag_reciprocal_math) | |
1414 | Same as -fassociative-math for expressions which include division. | |
1415 | ||
82a16202 | 1416 | ; Nonzero means that unsafe floating-point math optimizations are allowed |
1417 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
1418 | ; are allowed to assume that their arguments and results are "normal" | |
1419 | ; (e.g., nonnegative for SQRT). | |
ecdb6d1a | 1420 | funsafe-math-optimizations |
87c75316 | 1421 | Common Report Var(flag_unsafe_math_optimizations) Optimization |
72528c71 | 1422 | Allow math optimizations that may violate IEEE or ISO standards |
ecdb6d1a | 1423 | |
1e06725a | 1424 | funswitch-loops |
87c75316 | 1425 | Common Report Var(flag_unswitch_loops) Optimization |
72528c71 | 1426 | Perform loop unswitching |
1e06725a | 1427 | |
ecdb6d1a | 1428 | funwind-tables |
87c75316 | 1429 | Common Report Var(flag_unwind_tables) Optimization |
72528c71 | 1430 | Just generate unwind tables for exception handling |
ecdb6d1a | 1431 | |
386fbe6a | 1432 | fuse-linker-plugin |
1433 | Common Undocumented | |
1434 | ||
5923a5e7 | 1435 | fvar-tracking |
87c75316 | 1436 | Common Report Var(flag_var_tracking) VarExists Optimization |
5923a5e7 | 1437 | Perform variable tracking |
1438 | ||
9845d120 | 1439 | fvar-tracking-assignments |
1440 | Common Report Var(flag_var_tracking_assignments) VarExists Optimization | |
1441 | Perform variable tracking by annotating assignments | |
1442 | ||
1443 | fvar-tracking-assignments-toggle | |
1444 | Common Report Var(flag_var_tracking_assignments_toggle) VarExists Optimization | |
1445 | Toggle -fvar-tracking-assignments | |
1446 | ||
d53bb226 | 1447 | fvar-tracking-uninit |
1448 | Common Report Var(flag_var_tracking_uninit) Optimization | |
1449 | Perform variable tracking and also tag variables that are uninitialized | |
1450 | ||
c91e8223 | 1451 | ftree-vectorize |
87c75316 | 1452 | Common Report Var(flag_tree_vectorize) Optimization |
c91e8223 | 1453 | Enable loop vectorization on trees |
1454 | ||
37545e54 | 1455 | ftree-slp-vectorize |
1456 | Common Report Var(flag_tree_slp_vectorize) Init(2) Optimization | |
1457 | Enable basic block vectorization (SLP) on trees | |
1458 | ||
867c03eb | 1459 | fvect-cost-model |
1460 | Common Report Var(flag_vect_cost_model) Optimization | |
1461 | Enable use of cost model in vectorization | |
1462 | ||
25e3c2e8 | 1463 | ftree-vect-loop-version |
87c75316 | 1464 | Common Report Var(flag_tree_vect_loop_version) Init(1) Optimization |
25e3c2e8 | 1465 | Enable loop versioning when doing loop vectorization on trees |
1466 | ||
459e8543 | 1467 | ftree-vectorizer-verbose= |
1468 | Common RejectNegative Joined | |
98b93ebb | 1469 | -ftree-vectorizer-verbose=<number> Set the verbosity level of the vectorizer |
459e8543 | 1470 | |
2a6e95ba | 1471 | ftree-scev-cprop |
e8831472 | 1472 | Common Report Var(flag_tree_scev_cprop) Init(1) Optimization |
2a6e95ba | 1473 | Enable copy propagation of scalar-evolution information. |
1474 | ||
82a16202 | 1475 | ; -fverbose-asm causes extra commentary information to be produced in |
1476 | ; the generated assembly code (to make it more readable). This option | |
1477 | ; is generally only of use to those who actually need to read the | |
1478 | ; generated assembly code (perhaps while debugging the compiler itself). | |
1479 | ; -fno-verbose-asm, the default, causes the extra information | |
1480 | ; to not be added and is useful when comparing two assembler files. | |
ecdb6d1a | 1481 | fverbose-asm |
2e9da478 | 1482 | Common Report Var(flag_verbose_asm) |
72528c71 | 1483 | Add extra commentary to assembler output |
ecdb6d1a | 1484 | |
b212f378 | 1485 | fvisibility= |
1486 | Common Joined RejectNegative | |
1487 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility | |
1488 | ||
1489 | ||
1c6a7b8c | 1490 | fvpt |
87c75316 | 1491 | Common Report Var(flag_value_profile_transformations) Optimization |
1c6a7b8c | 1492 | Use expression value profiles in optimizations |
1493 | ||
eeb4a70e | 1494 | fweb |
87c75316 | 1495 | Common Report Var(flag_web) Init(2) Optimization |
eeb4a70e | 1496 | Construct webs and split unrelated uses of single variable |
1497 | ||
7bfefa9d | 1498 | fwhopr |
cba6710d | 1499 | Common |
1500 | Enable partitioned link-time optimization | |
1501 | ||
1502 | fwhopr= | |
1503 | Common RejectNegative UInteger Joined Var(flag_whopr) | |
1504 | Enable partitioned link-time optimization with specified number of parallel jobs | |
7bfefa9d | 1505 | |
e6a23add | 1506 | ftree-builtin-call-dce |
1507 | Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization | |
1508 | Enable conditional dead code elimination for builtin calls | |
1509 | ||
62eec3b4 | 1510 | fwhole-program |
87c75316 | 1511 | Common Report Var(flag_whole_program) Init(0) Optimization |
62eec3b4 | 1512 | Perform whole program optimizations |
1513 | ||
ecdb6d1a | 1514 | fwrapv |
87c75316 | 1515 | Common Report Var(flag_wrapv) Optimization |
72528c71 | 1516 | Assume signed arithmetic overflow wraps around |
ecdb6d1a | 1517 | |
ecdb6d1a | 1518 | fzero-initialized-in-bss |
2e9da478 | 1519 | Common Report Var(flag_zero_initialized_in_bss) Init(1) |
72528c71 | 1520 | Put zero initialized data in the bss section |
ecdb6d1a | 1521 | |
6f2f567f | 1522 | g |
1523 | Common JoinedOrMissing | |
b0e56fb1 | 1524 | Generate debug information in default format |
1525 | ||
1526 | gcoff | |
3d3b9d5b | 1527 | Common JoinedOrMissing Negative(gdwarf-) |
b0e56fb1 | 1528 | Generate debug information in COFF format |
1529 | ||
3d3b9d5b | 1530 | gdwarf- |
1531 | Common Joined UInteger Var(dwarf_version) Init(2) Negative(gstabs) | |
1532 | Generate debug information in DWARF v2 (or later) format | |
b0e56fb1 | 1533 | |
1534 | ggdb | |
1535 | Common JoinedOrMissing | |
1536 | Generate debug information in default extended format | |
1537 | ||
1538 | gstabs | |
a1baa5f1 | 1539 | Common JoinedOrMissing Negative(gstabs+) |
b0e56fb1 | 1540 | Generate debug information in STABS format |
1541 | ||
1542 | gstabs+ | |
a1baa5f1 | 1543 | Common JoinedOrMissing Negative(gvms) |
b0e56fb1 | 1544 | Generate debug information in extended STABS format |
1545 | ||
c16b6d19 | 1546 | gno-strict-dwarf |
024fa7dd | 1547 | Common RejectNegative Var(dwarf_strict,0) Init(-1) |
c16b6d19 | 1548 | Emit DWARF additions beyond selected version |
1549 | ||
1550 | gstrict-dwarf | |
1551 | Common Report RejectNegative Var(dwarf_strict,1) VarExists | |
1552 | Don't emit DWARF additions beyond selected version | |
1553 | ||
71278019 | 1554 | gtoggle |
1555 | Common Report Var(flag_gtoggle) | |
1556 | Toggle debug information generation | |
1557 | ||
b0e56fb1 | 1558 | gvms |
a1baa5f1 | 1559 | Common JoinedOrMissing Negative(gxcoff) |
b0e56fb1 | 1560 | Generate debug information in VMS format |
1561 | ||
1562 | gxcoff | |
a1baa5f1 | 1563 | Common JoinedOrMissing Negative(gxcoff+) |
b0e56fb1 | 1564 | Generate debug information in XCOFF format |
1565 | ||
1566 | gxcoff+ | |
a1baa5f1 | 1567 | Common JoinedOrMissing Negative(gcoff) |
b0e56fb1 | 1568 | Generate debug information in extended XCOFF format |
6f2f567f | 1569 | |
19bc000d | 1570 | iplugindir= |
1571 | Common Joined Var(plugindir_string) Init(0) | |
1572 | -iplugindir=<dir> Set <dir> to be the default plugin directory | |
1573 | ||
e690b385 | 1574 | o |
1575 | Common Joined Separate | |
53b8e5c1 | 1576 | -o <file> Place output into <file> |
e690b385 | 1577 | |
1578 | p | |
2e9da478 | 1579 | Common Var(profile_flag) |
53b8e5c1 | 1580 | Enable function profiling |
e690b385 | 1581 | |
1582 | pedantic | |
2e9da478 | 1583 | Common Var(pedantic) |
53b8e5c1 | 1584 | Issue warnings needed for strict compliance to the standard |
e690b385 | 1585 | |
1586 | pedantic-errors | |
1587 | Common | |
53b8e5c1 | 1588 | Like -pedantic but issue them as errors |
e690b385 | 1589 | |
3272db82 | 1590 | quiet |
2e9da478 | 1591 | Common Var(quiet_flag) |
53b8e5c1 | 1592 | Do not display functions compiled or elapsed time |
3272db82 | 1593 | |
e690b385 | 1594 | version |
2e9da478 | 1595 | Common Var(version_flag) |
53b8e5c1 | 1596 | Display the compiler's version |
e690b385 | 1597 | |
1598 | w | |
2e9da478 | 1599 | Common Var(inhibit_warnings) |
53b8e5c1 | 1600 | Suppress warnings |
e690b385 | 1601 | |
794febf8 | 1602 | shared |
1603 | Common RejectNegative Negative(pie) | |
1604 | Create a shared library | |
1605 | ||
1606 | pie | |
1607 | Common RejectNegative Negative(shared) | |
1608 | Create a position independent executable | |
1609 | ||
3272db82 | 1610 | ; This comment is to ensure we retain the blank line above. |