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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 | |
7765591b | 3 | ; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 |
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 | ||
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 | |
e690b385 | 53 | |
54 | -version | |
55 | Common | |
56 | ||
57 | G | |
837277ab | 58 | Common Joined Separate UInteger |
53b8e5c1 | 59 | -G<number> Put global and static data smaller than <number> bytes into a special section (on some targets) |
e690b385 | 60 | |
da3b1bab | 61 | O |
46f8e3b0 | 62 | Common JoinedOrMissing Optimization |
53b8e5c1 | 63 | -O<number> Set optimization level to <number> |
da3b1bab | 64 | |
65 | Os | |
46f8e3b0 | 66 | Common Optimization |
53b8e5c1 | 67 | Optimize for space rather than speed |
da3b1bab | 68 | |
69 | W | |
70 | Common RejectNegative | |
bb0814ce | 71 | This switch is deprecated; use -Wextra instead |
da3b1bab | 72 | |
6f2f567f | 73 | Waggregate-return |
87c75316 | 74 | Common Var(warn_aggregate_return) Warning |
bb0814ce | 75 | Warn about returning structures, unions or arrays |
6f2f567f | 76 | |
5bc96398 | 77 | Warray-bounds |
e8831472 | 78 | Common Var(warn_array_bounds) Warning |
5bc96398 | 79 | Warn if an array is accessed out of bounds |
80 | ||
9b2d6d13 | 81 | Wattributes |
87c75316 | 82 | Common Var(warn_attributes) Init(1) Warning |
9b2d6d13 | 83 | Warn about inappropriate attribute usage |
84 | ||
6f2f567f | 85 | Wcast-align |
87c75316 | 86 | Common Var(warn_cast_align) Warning |
bb0814ce | 87 | Warn about pointer casts which increase alignment |
6f2f567f | 88 | |
89 | Wdeprecated-declarations | |
87c75316 | 90 | Common Var(warn_deprecated_decl) Init(1) Warning |
bb0814ce | 91 | Warn about uses of __attribute__((deprecated)) declarations |
6f2f567f | 92 | |
93 | Wdisabled-optimization | |
87c75316 | 94 | Common Var(warn_disabled_optimization) Warning |
bb0814ce | 95 | Warn when an optimization pass is disabled |
6f2f567f | 96 | |
b5f30e7c | 97 | Wdisallowed-function-list= |
98 | Common RejectNegative Joined Warning | |
99 | Warn on calls to these functions | |
100 | ||
6f2f567f | 101 | Werror |
2e9da478 | 102 | Common Var(warnings_are_errors) |
bb0814ce | 103 | Treat all warnings as errors |
6f2f567f | 104 | |
76f02516 | 105 | Werror= |
106 | Common Joined | |
107 | Treat specified warning as error | |
108 | ||
da3b1bab | 109 | Wextra |
87c75316 | 110 | Common Warning |
53b8e5c1 | 111 | Print extra (possibly unwanted) warnings |
da3b1bab | 112 | |
295acf4f | 113 | Wfatal-errors |
2e9da478 | 114 | Common Var(flag_fatal_errors) |
295acf4f | 115 | Exit on the first error occurred |
116 | ||
6fdade09 | 117 | Wframe-larger-than= |
118 | Common RejectNegative Joined UInteger | |
15e88abc | 119 | -Wframe-larger-than=<number> Warn if a function's stack frame requires more than <number> bytes |
6fdade09 | 120 | |
6f2f567f | 121 | Winline |
87c75316 | 122 | Common Var(warn_inline) Warning |
bb0814ce | 123 | Warn when an inlined function cannot be inlined |
6f2f567f | 124 | |
125 | Wlarger-than- | |
87c75316 | 126 | Common RejectNegative Joined UInteger Warning |
17c66687 | 127 | |
128 | Wlarger-than= | |
129 | Common RejectNegative Joined UInteger Warning | |
130 | -Wlarger-than=<number> Warn if an object is larger than <number> bytes | |
6f2f567f | 131 | |
b13d1547 | 132 | Wlogical-op |
133 | Common Warning Var(warn_logical_op) | |
134 | Warn when a logical operator is suspicously always evaluating to true or false | |
135 | ||
7e3cc681 | 136 | Wunsafe-loop-optimizations |
87c75316 | 137 | Common Var(warn_unsafe_loop_optimizations) Warning |
7e3cc681 | 138 | Warn if the loop cannot be optimized due to nontrivial assumptions. |
139 | ||
6f2f567f | 140 | Wmissing-noreturn |
87c75316 | 141 | Common Var(warn_missing_noreturn) Warning |
bb0814ce | 142 | Warn about functions which might be candidates for __attribute__((noreturn)) |
6f2f567f | 143 | |
f63eb5d3 | 144 | Wmudflap |
145 | Common Var(warn_mudflap) Init(1) Warning | |
146 | Warn about constructs not instrumented by -fmudflap | |
147 | ||
55972f40 | 148 | Woverflow |
87c75316 | 149 | Common Var(warn_overflow) Init(1) Warning |
55972f40 | 150 | Warn about overflow in arithmetic expressions |
151 | ||
6f2f567f | 152 | Wpacked |
87c75316 | 153 | Common Var(warn_packed) Warning |
bb0814ce | 154 | Warn when the packed attribute has no effect on struct layout |
6f2f567f | 155 | |
156 | Wpadded | |
87c75316 | 157 | Common Var(warn_padded) Warning |
bb0814ce | 158 | Warn when padding is required to align structure members |
6f2f567f | 159 | |
160 | Wshadow | |
87c75316 | 161 | Common Var(warn_shadow) Warning |
bb0814ce | 162 | Warn when one local variable shadows another |
6f2f567f | 163 | |
f1a0edff | 164 | Wstack-protector |
87c75316 | 165 | Common Var(warn_stack_protect) Warning |
f1a0edff | 166 | Warn when not issuing stack smashing protection for some reason |
167 | ||
6f2f567f | 168 | Wstrict-aliasing |
87c75316 | 169 | Common Warning |
bb0814ce | 170 | Warn about code which might break strict aliasing rules |
6f2f567f | 171 | |
c1628b55 | 172 | Wstrict-aliasing= |
a54ab330 | 173 | Common Joined UInteger Var(warn_strict_aliasing) Init(-1) Warning |
c1628b55 | 174 | Warn about code which might break strict aliasing rules |
175 | ||
add6ee5e | 176 | Wstrict-overflow |
e8831472 | 177 | Common Warning |
add6ee5e | 178 | Warn about optimizations that assume that signed overflow is undefined |
179 | ||
180 | Wstrict-overflow= | |
a54ab330 | 181 | Common Joined UInteger Var(warn_strict_overflow) Init(-1) Warning |
add6ee5e | 182 | Warn about optimizations that assume that signed overflow is undefined |
183 | ||
6f2f567f | 184 | Wswitch |
87c75316 | 185 | Common Var(warn_switch) Warning |
bb0814ce | 186 | Warn about enumerated switches, with no default, missing a case |
6f2f567f | 187 | |
188 | Wswitch-default | |
87c75316 | 189 | Common Var(warn_switch_default) Warning |
bb0814ce | 190 | Warn about enumerated switches missing a \"default:\" statement |
6f2f567f | 191 | |
192 | Wswitch-enum | |
87c75316 | 193 | Common Var(warn_switch_enum) Warning |
bb0814ce | 194 | Warn about all enumerated switches missing a specific case |
6f2f567f | 195 | |
196 | Wsystem-headers | |
87c75316 | 197 | Common Var(warn_system_headers) Warning |
72528c71 | 198 | Do not suppress warnings from system headers |
6f2f567f | 199 | |
100b67da | 200 | Wtype-limits |
201 | Common Var(warn_type_limits) Init(-1) Warning | |
202 | Warn if a comparison is always true or always false due to the limited range of the data type | |
203 | ||
6f2f567f | 204 | Wuninitialized |
87c75316 | 205 | Common Var(warn_uninitialized) Warning |
bb0814ce | 206 | Warn about uninitialized automatic variables |
6f2f567f | 207 | |
208 | Wunreachable-code | |
87c75316 | 209 | Common Var(warn_notreached) Warning |
bb0814ce | 210 | Warn about code that will never be executed |
6f2f567f | 211 | |
da3b1bab | 212 | Wunused |
278e3a1f | 213 | Common Var(warn_unused) Init(0) Warning |
53b8e5c1 | 214 | Enable all -Wunused- warnings |
da3b1bab | 215 | |
6f2f567f | 216 | Wunused-function |
278e3a1f | 217 | Common Var(warn_unused_function) Init(-1) Warning |
bb0814ce | 218 | Warn when a function is unused |
6f2f567f | 219 | |
220 | Wunused-label | |
278e3a1f | 221 | Common Var(warn_unused_label) Init(-1) Warning |
bb0814ce | 222 | Warn when a label is unused |
6f2f567f | 223 | |
224 | Wunused-parameter | |
278e3a1f | 225 | Common Var(warn_unused_parameter) Init(-1) Warning |
bb0814ce | 226 | Warn when a function parameter is unused |
6f2f567f | 227 | |
228 | Wunused-value | |
278e3a1f | 229 | Common Var(warn_unused_value) Init(-1) Warning |
bb0814ce | 230 | Warn when an expression value is unused |
6f2f567f | 231 | |
232 | Wunused-variable | |
278e3a1f | 233 | Common Var(warn_unused_variable) Init(-1) Warning |
bb0814ce | 234 | Warn when a variable is unused |
6f2f567f | 235 | |
c81ed7c1 | 236 | Wcoverage-mismatch |
e8831472 | 237 | Common RejectNegative Var(warn_coverage_mismatch) Warning |
c81ed7c1 | 238 | Warn instead of error in case profiles in -fprofile-use do not match |
239 | ||
e690b385 | 240 | aux-info |
241 | Common Separate | |
53b8e5c1 | 242 | -aux-info <file> Emit declaration information into <file> |
e690b385 | 243 | |
244 | aux-info= | |
245 | Common Joined | |
246 | ||
247 | auxbase | |
248 | Common Separate | |
249 | ||
250 | auxbase-strip | |
251 | Common Separate | |
252 | ||
253 | d | |
254 | Common Joined | |
53b8e5c1 | 255 | -d<letters> Enable dumps from specific passes of the compiler |
e690b385 | 256 | |
257 | dumpbase | |
258 | Common Separate | |
53b8e5c1 | 259 | -dumpbase <file> Set the file basename to be used for dumps |
e690b385 | 260 | |
82a16202 | 261 | ; The version of the C++ ABI in use. The following values are allowed: |
262 | ; | |
263 | ; 0: The version of the ABI believed most conformant with the C++ ABI | |
264 | ; specification. This ABI may change as bugs are discovered and fixed. | |
265 | ; Therefore, 0 will not necessarily indicate the same ABI in different | |
266 | ; versions of G++. | |
267 | ; | |
268 | ; 1: The version of the ABI first used in G++ 3.2. | |
269 | ; | |
e9e7c198 | 270 | ; 2: The version of the ABI first used in G++ 3.4. |
271 | ; | |
82a16202 | 272 | ; Additional positive integers will be assigned as new versions of |
273 | ; the ABI become the default version of the ABI. | |
e100aadc | 274 | fabi-version= |
2e9da478 | 275 | Common Joined UInteger Var(flag_abi_version) Init(2) |
e100aadc | 276 | |
ecdb6d1a | 277 | falign-functions |
46f8e3b0 | 278 | Common Report Var(align_functions,0) Optimization UInteger |
72528c71 | 279 | Align the start of functions |
ecdb6d1a | 280 | |
941a4893 | 281 | falign-functions= |
282 | Common RejectNegative Joined UInteger | |
283 | ||
ecdb6d1a | 284 | falign-jumps |
46f8e3b0 | 285 | Common Report Var(align_jumps,0) Optimization UInteger |
72528c71 | 286 | Align labels which are only reached by jumping |
ecdb6d1a | 287 | |
941a4893 | 288 | falign-jumps= |
289 | Common RejectNegative Joined UInteger | |
290 | ||
ecdb6d1a | 291 | falign-labels |
46f8e3b0 | 292 | Common Report Var(align_labels,0) Optimization UInteger |
72528c71 | 293 | Align all labels |
ecdb6d1a | 294 | |
941a4893 | 295 | falign-labels= |
296 | Common RejectNegative Joined UInteger | |
297 | ||
ecdb6d1a | 298 | falign-loops |
46f8e3b0 | 299 | Common Report Var(align_loops) Optimization UInteger |
72528c71 | 300 | Align the start of loops |
ecdb6d1a | 301 | |
941a4893 | 302 | falign-loops= |
303 | Common RejectNegative Joined UInteger | |
304 | ||
82a16202 | 305 | ; This flag is only tested if alias checking is enabled. |
306 | ; 0 if pointer arguments may alias each other. True in C. | |
307 | ; 1 if pointer arguments may not alias each other but may alias | |
308 | ; global variables. | |
309 | ; 2 if pointer arguments may not alias each other and may not | |
5ff22aea | 310 | ; alias global variables. |
311 | ; 3 if pointer arguments may not alias anything. True in Fortran. | |
312 | ; Set by the front end. | |
ecdb6d1a | 313 | fargument-alias |
87c75316 | 314 | Common Report Var(flag_argument_noalias,0) Optimization |
72528c71 | 315 | Specify that arguments may alias each other and globals |
ecdb6d1a | 316 | |
317 | fargument-noalias | |
87c75316 | 318 | Common Report Var(flag_argument_noalias,1) VarExists Optimization |
72528c71 | 319 | Assume arguments may alias globals but not each other |
ecdb6d1a | 320 | |
321 | fargument-noalias-global | |
87c75316 | 322 | Common Report Var(flag_argument_noalias,2) VarExists Optimization |
72528c71 | 323 | Assume arguments alias neither each other nor globals |
ecdb6d1a | 324 | |
5ff22aea | 325 | fargument-noalias-anything |
87c75316 | 326 | Common Report Var(flag_argument_noalias,3) VarExists Optimization |
5ff22aea | 327 | Assume arguments alias no other storage |
328 | ||
ecdb6d1a | 329 | fasynchronous-unwind-tables |
87c75316 | 330 | Common Report Var(flag_asynchronous_unwind_tables) Optimization |
72528c71 | 331 | Generate unwind tables that are exact at each instruction boundary |
ecdb6d1a | 332 | |
3072d30e | 333 | fauto-inc-dec |
334 | Common Report Var(flag_auto_inc_dec) Init(1) | |
335 | Generate auto-inc/dec instructions | |
336 | ||
82a16202 | 337 | ; -fcheck-bounds causes gcc to generate array bounds checks. |
338 | ; For C, C++ and ObjC: defaults off. | |
339 | ; For Java: defaults to on. | |
340 | ; For Fortran: defaults to off. | |
ecdb6d1a | 341 | fbounds-check |
2e9da478 | 342 | Common Report Var(flag_bounds_check) |
72528c71 | 343 | Generate code to check bounds before indexing arrays |
ecdb6d1a | 344 | |
345 | fbranch-count-reg | |
87c75316 | 346 | Common Report Var(flag_branch_on_count_reg) Init(1) Optimization |
72528c71 | 347 | Replace add, compare, branch with branch on count register |
ecdb6d1a | 348 | |
349 | fbranch-probabilities | |
87c75316 | 350 | Common Report Var(flag_branch_probabilities) Optimization |
72528c71 | 351 | Use profiling information for branch probabilities |
ecdb6d1a | 352 | |
1e06725a | 353 | fbranch-target-load-optimize |
87c75316 | 354 | Common Report Var(flag_branch_target_load_optimize) Optimization |
72528c71 | 355 | Perform branch target load optimization before prologue / epilogue threading |
1e06725a | 356 | |
357 | fbranch-target-load-optimize2 | |
87c75316 | 358 | Common Report Var(flag_branch_target_load_optimize2) Optimization |
72528c71 | 359 | Perform branch target load optimization after prologue / epilogue threading |
1e06725a | 360 | |
08d163a9 | 361 | fbtr-bb-exclusive |
87c75316 | 362 | Common Report Var(flag_btr_bb_exclusive) Optimization |
08d163a9 | 363 | Restrict target load migration not to re-use registers in any basic block |
364 | ||
941a4893 | 365 | fcall-saved- |
366 | Common Joined RejectNegative | |
53b8e5c1 | 367 | -fcall-saved-<register> Mark <register> as being preserved across functions |
941a4893 | 368 | |
369 | fcall-used- | |
370 | Common Joined RejectNegative | |
53b8e5c1 | 371 | -fcall-used-<register> Mark <register> as being corrupted by function calls |
941a4893 | 372 | |
82a16202 | 373 | ; Nonzero for -fcaller-saves: allocate values in regs that need to |
374 | ; be saved across function calls, if that produces overall better code. | |
375 | ; Optional now, so people can test it. | |
1e06725a | 376 | fcaller-saves |
87c75316 | 377 | Common Report Var(flag_caller_saves) Optimization |
72528c71 | 378 | Save registers around function calls |
1e06725a | 379 | |
355572cc | 380 | fcheck-data-deps |
381 | Common Report Var(flag_check_data_deps) | |
382 | Compare the results of several data dependence analyzers. | |
383 | ||
ecdb6d1a | 384 | fcommon |
87c75316 | 385 | Common Report Var(flag_no_common,0) Optimization |
72528c71 | 386 | Do not put uninitialized globals in the common section |
ecdb6d1a | 387 | |
388 | fcprop-registers | |
87c75316 | 389 | Common Report Var(flag_cprop_registers) Optimization |
72528c71 | 390 | Perform a register copy-propagation optimization pass |
ecdb6d1a | 391 | |
1e06725a | 392 | fcrossjumping |
87c75316 | 393 | Common Report Var(flag_crossjumping) Optimization |
72528c71 | 394 | Perform cross-jumping optimization |
1e06725a | 395 | |
396 | fcse-follow-jumps | |
87c75316 | 397 | Common Report Var(flag_cse_follow_jumps) Optimization |
72528c71 | 398 | When running CSE, follow jumps to their targets |
1e06725a | 399 | |
400 | fcse-skip-blocks | |
87c75316 | 401 | Common Report Var(flag_cse_skip_blocks) Optimization |
72528c71 | 402 | When running CSE, follow conditional jumps |
1e06725a | 403 | |
45b9d334 | 404 | fcx-limited-range |
87c75316 | 405 | Common Report Var(flag_cx_limited_range) Optimization |
45b9d334 | 406 | Omit range reduction step when performing complex division |
407 | ||
608256a0 | 408 | fcx-fortran-rules |
409 | Common Report Var(flag_cx_fortran_rules) Optimization | |
410 | Complex multiplication and division follow Fortran rules | |
411 | ||
ecdb6d1a | 412 | fdata-sections |
87c75316 | 413 | Common Report Var(flag_data_sections) Optimization |
72528c71 | 414 | Place data items into their own section |
ecdb6d1a | 415 | |
d2153a46 | 416 | fdbg-cnt-list |
417 | Common Report | |
418 | List all available debugging counters with their limits and counts. | |
419 | ||
3072d30e | 420 | fdbg-cnt= |
421 | Common RejectNegative Joined | |
d2153a46 | 422 | -fdbg-cnt=<counter>:<limit>[,<counter>:<limit>,...] Set the debug counter limit. |
3072d30e | 423 | |
5f1f2de5 | 424 | fdebug-prefix-map= |
425 | Common Joined RejectNegative | |
426 | Map one directory name to another in debug information | |
427 | ||
82a16202 | 428 | ; Nonzero for -fdefer-pop: don't pop args after each function call |
429 | ; instead save them up to pop many calls' args with one insns. | |
1e06725a | 430 | fdefer-pop |
87c75316 | 431 | Common Report Var(flag_defer_pop) Optimization |
72528c71 | 432 | Defer popping functions args from stack until later |
1e06725a | 433 | |
434 | fdelayed-branch | |
87c75316 | 435 | Common Report Var(flag_delayed_branch) Optimization |
72528c71 | 436 | Attempt to fill delay slots of branch instructions |
1e06725a | 437 | |
438 | fdelete-null-pointer-checks | |
87c75316 | 439 | Common Report Var(flag_delete_null_pointer_checks) Optimization |
72528c71 | 440 | Delete useless null pointer checks |
1e06725a | 441 | |
442 | fdiagnostics-show-location= | |
443 | Common Joined RejectNegative | |
53b8e5c1 | 444 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics |
1e06725a | 445 | |
efb9d9ee | 446 | fdiagnostics-show-option |
b0932b2f | 447 | Common |
3284a242 | 448 | Amend appropriate diagnostic messages with the command line option that controls them |
efb9d9ee | 449 | |
4ee9c684 | 450 | fdump- |
451 | Common Joined RejectNegative | |
452 | -fdump-<type> Dump various compiler internals to a file | |
453 | ||
969239ad | 454 | fdump-noaddr |
455 | Common Report Var(flag_dump_noaddr) | |
456 | Suppress output of addresses in debugging dumps | |
457 | ||
ecdb6d1a | 458 | fdump-unnumbered |
2e9da478 | 459 | Common Report Var(flag_dump_unnumbered) VarExists |
969239ad | 460 | Suppress output of instruction numbers, line number notes and addresses in debugging dumps |
ecdb6d1a | 461 | |
fb39ff6e | 462 | fdwarf2-cfi-asm |
463 | Common Report Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE) | |
464 | Enable CFI tables via GAS assembler directives. | |
465 | ||
f1aa280c | 466 | fearly-inlining |
87c75316 | 467 | Common Report Var(flag_early_inlining) Init(1) Optimization |
f1aa280c | 468 | Perform early inlining |
469 | ||
1e06725a | 470 | feliminate-dwarf2-dups |
2e9da478 | 471 | Common Report Var(flag_eliminate_dwarf2_dups) |
72528c71 | 472 | Perform DWARF2 duplicate elimination |
1e06725a | 473 | |
262444a6 | 474 | feliminate-unused-debug-symbols |
2e9da478 | 475 | Common Report Var(flag_debug_only_used_symbols) |
72528c71 | 476 | Perform unused type elimination in debug info |
262444a6 | 477 | |
1e06725a | 478 | feliminate-unused-debug-types |
2e9da478 | 479 | Common Report Var(flag_eliminate_unused_debug_types) Init(1) |
72528c71 | 480 | Perform unused type elimination in debug info |
1e06725a | 481 | |
0c573f98 | 482 | femit-class-debug-always |
fd5e1dfe | 483 | Common Report Var(flag_emit_class_debug_always) Init(0) |
0c573f98 | 484 | Do not suppress C++ class debug information. |
485 | ||
ecdb6d1a | 486 | fexceptions |
87c75316 | 487 | Common Report Var(flag_exceptions) Optimization |
72528c71 | 488 | Enable exception handling |
ecdb6d1a | 489 | |
1e06725a | 490 | fexpensive-optimizations |
87c75316 | 491 | Common Report Var(flag_expensive_optimizations) Optimization |
72528c71 | 492 | Perform a number of minor, expensive optimizations |
1e06725a | 493 | |
941a4893 | 494 | ffast-math |
495 | Common | |
496 | ||
ecdb6d1a | 497 | ffinite-math-only |
87c75316 | 498 | Common Report Var(flag_finite_math_only) Optimization |
72528c71 | 499 | Assume no NaNs or infinities are generated |
ecdb6d1a | 500 | |
941a4893 | 501 | ffixed- |
502 | Common Joined RejectNegative | |
53b8e5c1 | 503 | -ffixed-<register> Mark <register> as being unavailable to the compiler |
941a4893 | 504 | |
1e06725a | 505 | ffloat-store |
87c75316 | 506 | Common Report Var(flag_float_store) Optimization |
82a16202 | 507 | Don't allocate floats and doubles in extended-precision registers |
1e06725a | 508 | |
509 | fforce-addr | |
4d25f9eb | 510 | Common |
511 | Does nothing. Preserved for backward compatibility. | |
1e06725a | 512 | |
55d51835 | 513 | fforward-propagate |
514 | Common Report Var(flag_forward_propagate) Optimization | |
42a3a38b | 515 | Perform a forward propagation pass on RTL |
516 | ||
82a16202 | 517 | ; Nonzero means don't put addresses of constant functions in registers. |
518 | ; Used for compiling the Unix kernel, where strange substitutions are | |
519 | ; done on the assembly output. | |
1e06725a | 520 | ffunction-cse |
2e9da478 | 521 | Common Report Var(flag_no_function_cse,0) |
72528c71 | 522 | Allow function addresses to be held in registers |
1e06725a | 523 | |
ecdb6d1a | 524 | ffunction-sections |
2e9da478 | 525 | Common Report Var(flag_function_sections) |
72528c71 | 526 | Place each function into its own section |
ecdb6d1a | 527 | |
1e06725a | 528 | fgcse |
87c75316 | 529 | Common Report Var(flag_gcse) Optimization |
72528c71 | 530 | Perform global common subexpression elimination |
1e06725a | 531 | |
532 | fgcse-lm | |
87c75316 | 533 | Common Report Var(flag_gcse_lm) Init(1) Optimization |
72528c71 | 534 | Perform enhanced load motion during global common subexpression elimination |
1e06725a | 535 | |
536 | fgcse-sm | |
87c75316 | 537 | Common Report Var(flag_gcse_sm) Init(0) Optimization |
72528c71 | 538 | Perform store motion after global common subexpression elimination |
1e06725a | 539 | |
5c47e414 | 540 | fgcse-las |
87c75316 | 541 | Common Report Var(flag_gcse_las) Init(0) Optimization |
839f8415 | 542 | Perform redundant load after store elimination in global common subexpression |
543 | elimination | |
544 | ||
545 | fgcse-after-reload | |
87c75316 | 546 | Common Report Var(flag_gcse_after_reload) Optimization |
839f8415 | 547 | Perform global common subexpression elimination after register allocation |
3284a242 | 548 | has finished |
5c47e414 | 549 | |
ecdb6d1a | 550 | fguess-branch-probability |
87c75316 | 551 | Common Report Var(flag_guess_branch_prob) Optimization |
72528c71 | 552 | Enable guessing of branch probabilities |
ecdb6d1a | 553 | |
82a16202 | 554 | ; Nonzero means ignore `#ident' directives. 0 means handle them. |
555 | ; Generate position-independent code for executables if possible | |
556 | ; On SVR4 targets, it also controls whether or not to emit a | |
557 | ; string identifying the compiler. | |
ecdb6d1a | 558 | fident |
2e9da478 | 559 | Common Report Var(flag_no_ident,0) |
72528c71 | 560 | Process #ident directives |
ecdb6d1a | 561 | |
1e06725a | 562 | fif-conversion |
87c75316 | 563 | Common Report Var(flag_if_conversion) Optimization |
72528c71 | 564 | Perform conversion of conditional jumps to branchless equivalents |
1e06725a | 565 | |
566 | fif-conversion2 | |
87c75316 | 567 | Common Report Var(flag_if_conversion2) Optimization |
72528c71 | 568 | Perform conversion of conditional jumps to conditional execution |
1e06725a | 569 | |
82a16202 | 570 | ; -finhibit-size-directive inhibits output of .size for ELF. |
571 | ; This is used only for compiling crtstuff.c, | |
572 | ; and it may be extended to other effects | |
573 | ; needed for crtstuff.c on other systems. | |
ecdb6d1a | 574 | finhibit-size-directive |
2e9da478 | 575 | Common Report Var(flag_inhibit_size_directive) |
72528c71 | 576 | Do not generate .size directives |
ecdb6d1a | 577 | |
f8daee9b | 578 | findirect-inlining |
579 | Common Report Var(flag_indirect_inlining) | |
580 | Perform indirect inlining | |
581 | ||
82a16202 | 582 | ; Nonzero means that functions declared `inline' will be treated |
583 | ; as `static'. Prevents generation of zillions of copies of unused | |
584 | ; static inline functions; instead, `inlines' are written out | |
585 | ; only when actually used. Used in conjunction with -g. Also | |
586 | ; does the right thing with #pragma interface. | |
1e06725a | 587 | finline |
1c2f0012 | 588 | Common Report Var(flag_no_inline,0) Init(0) |
72528c71 | 589 | Pay attention to the \"inline\" keyword |
1e06725a | 590 | |
b97510b2 | 591 | finline-small-functions |
592 | Common Report Var(flag_inline_small_functions) Optimization | |
593 | Integrate simple functions into their callers when code size is known to not growth | |
594 | ||
1e06725a | 595 | finline-functions |
87c75316 | 596 | Common Report Var(flag_inline_functions) Optimization |
72528c71 | 597 | Integrate simple functions into their callers |
1e06725a | 598 | |
f1aa280c | 599 | finline-functions-called-once |
87c75316 | 600 | Common Report Var(flag_inline_functions_called_once) Init(1) Optimization |
f1aa280c | 601 | Integrate functions called once into their callers |
9e0baf4d | 602 | |
39470ac3 | 603 | finline-limit- |
604 | Common RejectNegative Joined UInteger | |
605 | ||
606 | finline-limit= | |
607 | Common RejectNegative Joined UInteger | |
53b8e5c1 | 608 | -finline-limit=<number> Limit the size of inlined functions to <number> |
39470ac3 | 609 | |
ecdb6d1a | 610 | finstrument-functions |
2e9da478 | 611 | Common Report Var(flag_instrument_function_entry_exit) |
72528c71 | 612 | Instrument function entry and exit with profiling calls |
ecdb6d1a | 613 | |
a95c0776 | 614 | finstrument-functions-exclude-function-list= |
615 | Common RejectNegative Joined | |
616 | -finstrument-functions-exclude-function-list=name,... Do not instrument listed functions | |
617 | ||
618 | finstrument-functions-exclude-file-list= | |
619 | Common RejectNegative Joined | |
620 | -finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files | |
621 | ||
a17a73c7 | 622 | fipa-cp |
87c75316 | 623 | Common Report Var(flag_ipa_cp) Optimization |
a17a73c7 | 624 | Perform Interprocedural constant propagation |
625 | ||
f7d118a9 | 626 | fipa-pure-const |
87c75316 | 627 | Common Report Var(flag_ipa_pure_const) Init(0) Optimization |
f7d118a9 | 628 | Discover pure and const functions |
629 | ||
bdf4f142 | 630 | fipa-pta |
87c75316 | 631 | Common Report Var(flag_ipa_pta) Init(0) Optimization |
bdf4f142 | 632 | Perform interprocedural points-to analysis |
633 | ||
f7d118a9 | 634 | fipa-reference |
87c75316 | 635 | Common Report Var(flag_ipa_reference) Init(0) Optimization |
f7d118a9 | 636 | Discover readonly and non addressable static variables |
637 | ||
638 | fipa-type-escape | |
87c75316 | 639 | Common Report Var(flag_ipa_type_escape) Init(0) Optimization |
f7d118a9 | 640 | Type based escape and alias analysis |
641 | ||
604cde73 | 642 | fipa-matrix-reorg |
76c71f34 | 643 | Common Report Var(flag_ipa_matrix_reorg) Optimization |
604cde73 | 644 | Perform matrix layout flattening and transposing based |
645 | on profiling information. | |
646 | ||
f27ac341 | 647 | fipa-struct-reorg |
648 | Common Report Var(flag_ipa_struct_reorg) | |
649 | Perform structure layout optimizations based | |
650 | on profiling information. | |
651 | ||
dec41e98 | 652 | fivopts |
87c75316 | 653 | Common Report Var(flag_ivopts) Init(1) Optimization |
dec41e98 | 654 | Optimize induction variables on trees |
655 | ||
51d8e657 | 656 | fjump-tables |
87c75316 | 657 | Common Var(flag_jump_tables) Init(1) Optimization |
51d8e657 | 658 | Use jump tables for sufficiently large switch statements |
659 | ||
1e06725a | 660 | fkeep-inline-functions |
2e9da478 | 661 | Common Report Var(flag_keep_inline_functions) |
72528c71 | 662 | Generate code for functions even if they are fully inlined |
1e06725a | 663 | |
664 | fkeep-static-consts | |
2e9da478 | 665 | Common Report Var(flag_keep_static_consts) Init(1) |
72528c71 | 666 | Emit static const variables even if they are not used |
1e06725a | 667 | |
ecdb6d1a | 668 | fleading-underscore |
2e9da478 | 669 | Common Report Var(flag_leading_underscore) Init(-1) |
72528c71 | 670 | Give external symbols a leading underscore |
ecdb6d1a | 671 | |
4f87b914 | 672 | floop-optimize |
673 | Common | |
334ec2d8 | 674 | Does nothing. Preserved for backward compatibility. |
4f87b914 | 675 | |
ecdb6d1a | 676 | fmath-errno |
46f8e3b0 | 677 | Common Report Var(flag_errno_math) Init(1) Optimization |
72528c71 | 678 | Set errno after built-in math functions |
ecdb6d1a | 679 | |
680 | fmem-report | |
2e9da478 | 681 | Common Report Var(mem_report) |
72528c71 | 682 | Report on permanent memory allocation |
ecdb6d1a | 683 | |
82a16202 | 684 | ; This will attempt to merge constant section constants, if 1 only |
685 | ; string constants and constants from constant pool, if 2 also constant | |
686 | ; variables. | |
ecdb6d1a | 687 | fmerge-all-constants |
87c75316 | 688 | Common Report Var(flag_merge_constants,2) Init(1) Optimization |
72528c71 | 689 | Attempt to merge identical constants and constant variables |
ecdb6d1a | 690 | |
691 | fmerge-constants | |
87c75316 | 692 | Common Report Var(flag_merge_constants,1) VarExists Optimization |
72528c71 | 693 | Attempt to merge identical constants across compilation units |
ecdb6d1a | 694 | |
7765591b | 695 | fmerge-debug-strings |
696 | Common Report Var(flag_merge_debug_strings) Init(1) | |
697 | Attempt to merge identical debug strings across compilation units | |
698 | ||
1e06725a | 699 | fmessage-length= |
700 | Common RejectNegative Joined UInteger | |
53b8e5c1 | 701 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping |
1e06725a | 702 | |
406a73e7 | 703 | fmodulo-sched |
87c75316 | 704 | Common Report Var(flag_modulo_sched) Optimization |
406a73e7 | 705 | Perform SMS based modulo scheduling before the first scheduling pass |
706 | ||
3a943084 | 707 | fmodulo-sched-allow-regmoves |
708 | Common Report Var(flag_modulo_sched_allow_regmoves) | |
709 | Perform SMS based modulo scheduling with register moves allowed | |
710 | ||
3a0ecac2 | 711 | fmove-loop-invariants |
87c75316 | 712 | Common Report Var(flag_move_loop_invariants) Init(1) Optimization |
3a0ecac2 | 713 | Move loop invariant computations out of loops |
714 | ||
4ee9c684 | 715 | fmudflap |
2e9da478 | 716 | Common RejectNegative Report Var(flag_mudflap) |
3284a242 | 717 | Add mudflap bounds-checking instrumentation for single-threaded program |
4ee9c684 | 718 | |
719 | fmudflapth | |
c1d36cca | 720 | Common RejectNegative Report VarExists Var(flag_mudflap,2) |
3284a242 | 721 | Add mudflap bounds-checking instrumentation for multi-threaded program |
4ee9c684 | 722 | |
723 | fmudflapir | |
2e9da478 | 724 | Common RejectNegative Report Var(flag_mudflap_ignore_reads) |
3284a242 | 725 | Ignore read operations when inserting mudflap instrumentation |
4ee9c684 | 726 | |
3072d30e | 727 | fdce |
76c71f34 | 728 | Common Var(flag_dce) Init(1) Optimization |
3072d30e | 729 | Use the RTL dead code elimination pass |
730 | ||
731 | fdse | |
76c71f34 | 732 | Common Var(flag_dse) Init(1) Optimization |
3072d30e | 733 | Use the RTL dead store elimination pass |
734 | ||
f045d41d | 735 | freschedule-modulo-scheduled-loops |
87c75316 | 736 | Common Report Var(flag_resched_modulo_sched) Optimization |
f045d41d | 737 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling |
738 | ||
ecdb6d1a | 739 | fnon-call-exceptions |
87c75316 | 740 | Common Report Var(flag_non_call_exceptions) Optimization |
72528c71 | 741 | Support synchronous non-call exceptions |
ecdb6d1a | 742 | |
1e06725a | 743 | fomit-frame-pointer |
87c75316 | 744 | Common Report Var(flag_omit_frame_pointer) Optimization |
72528c71 | 745 | When possible do not generate stack frames |
1e06725a | 746 | |
ecdb6d1a | 747 | foptimize-register-move |
87c75316 | 748 | Common Report Var(flag_regmove) Optimization |
72528c71 | 749 | Do the full register move optimization pass |
ecdb6d1a | 750 | |
1e06725a | 751 | foptimize-sibling-calls |
87c75316 | 752 | Common Report Var(flag_optimize_sibling_calls) Optimization |
72528c71 | 753 | Optimize sibling and tail recursive calls |
1e06725a | 754 | |
51949610 | 755 | fpre-ipa-mem-report |
756 | Common Report Var(pre_ipa_mem_report) | |
757 | Report on memory allocation before interprocedural optimization | |
758 | ||
759 | fpost-ipa-mem-report | |
760 | Common Report Var(post_ipa_mem_report) | |
761 | Report on memory allocation before interprocedural optimization | |
762 | ||
ecdb6d1a | 763 | fpack-struct |
87c75316 | 764 | Common Report Var(flag_pack_struct) Optimization |
72528c71 | 765 | Pack structure members together without holes |
ecdb6d1a | 766 | |
6b5553e5 | 767 | fpack-struct= |
87c75316 | 768 | Common RejectNegative Joined UInteger Optimization |
6b5553e5 | 769 | -fpack-struct=<number> Set initial maximum structure member alignment |
770 | ||
1e06725a | 771 | fpcc-struct-return |
2e9da478 | 772 | Common Report Var(flag_pcc_struct_return,1) VarExists |
72528c71 | 773 | Return small aggregates in memory, not registers |
1e06725a | 774 | |
775 | fpeel-loops | |
87c75316 | 776 | Common Report Var(flag_peel_loops) Optimization |
72528c71 | 777 | Perform loop peeling |
1e06725a | 778 | |
779 | fpeephole | |
87c75316 | 780 | Common Report Var(flag_no_peephole,0) Optimization |
72528c71 | 781 | Enable machine specific peephole optimizations |
1e06725a | 782 | |
ecdb6d1a | 783 | fpeephole2 |
87c75316 | 784 | Common Report Var(flag_peephole2) Optimization |
72528c71 | 785 | Enable an RTL peephole pass before sched2 |
ecdb6d1a | 786 | |
82a16202 | 787 | fPIC |
788 | Common Report Var(flag_pic,2) | |
789 | Generate position-independent code if possible (large mode) | |
790 | ||
791 | fPIE | |
792 | Common Report Var(flag_pie,2) | |
793 | Generate position-independent code for executables if possible (large mode) | |
794 | ||
ecdb6d1a | 795 | fpic |
2e9da478 | 796 | Common Report Var(flag_pic,1) VarExists |
82a16202 | 797 | Generate position-independent code if possible (small mode) |
ecdb6d1a | 798 | |
799 | fpie | |
2e9da478 | 800 | Common Report Var(flag_pie,1) VarExists |
82a16202 | 801 | Generate position-independent code for executables if possible (small mode) |
ecdb6d1a | 802 | |
ad4a85ad | 803 | fpredictive-commoning |
76c71f34 | 804 | Common Report Var(flag_predictive_commoning) Optimization |
ad4a85ad | 805 | Run predictive commoning optimization. |
806 | ||
1e06725a | 807 | fprefetch-loop-arrays |
87c75316 | 808 | Common Report Var(flag_prefetch_loop_arrays) Optimization |
72528c71 | 809 | Generate prefetch instructions, if available, for arrays in loops |
1e06725a | 810 | |
ecdb6d1a | 811 | fprofile |
2e9da478 | 812 | Common Report Var(profile_flag) |
72528c71 | 813 | Enable basic program profiling code |
ecdb6d1a | 814 | |
815 | fprofile-arcs | |
2e9da478 | 816 | Common Report Var(profile_arc_flag) |
72528c71 | 817 | Insert arc-based program profiling code |
ecdb6d1a | 818 | |
3e3a0e9c | 819 | fprofile-dir= |
820 | Common Joined RejectNegative | |
821 | Set the top-level directory for storing the profile data. | |
822 | The default is 'pwd'. | |
823 | ||
e0dc6f2b | 824 | fprofile-correction |
825 | Common Report Var(flag_profile_correction) | |
826 | Enable correction of flow inconsistent profile data input | |
827 | ||
7dea76ba | 828 | fprofile-generate |
829 | Common | |
830 | Enable common options for generating profile info for profile feedback directed optimizations | |
831 | ||
3e3a0e9c | 832 | fprofile-generate= |
833 | Common Joined RejectNegative | |
834 | Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir= | |
835 | ||
7dea76ba | 836 | fprofile-use |
3e3a0e9c | 837 | Common Var(flag_profile_use) |
7dea76ba | 838 | Enable common options for performing profile feedback directed optimizations |
839 | ||
3e3a0e9c | 840 | fprofile-use= |
841 | Common Joined RejectNegative | |
842 | Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir= | |
843 | ||
1c6a7b8c | 844 | fprofile-values |
2e9da478 | 845 | Common Report Var(flag_profile_values) |
1c6a7b8c | 846 | Insert code to profile values of expressions |
847 | ||
1e06725a | 848 | frandom-seed |
849 | Common | |
850 | ||
851 | frandom-seed= | |
852 | Common Joined RejectNegative | |
53b8e5c1 | 853 | -frandom-seed=<string> Make compile reproducible using <string> |
1e06725a | 854 | |
7c6733e8 | 855 | ; This switch causes the command line that was used to create an |
856 | ; object file to be recorded into the object file. The exact format | |
857 | ; of this recording is target and binary file format dependent. | |
858 | ; It is related to the -fverbose-asm switch, but that switch only | |
859 | ; records information in the assembler output file as comments, so | |
860 | ; they never reach the object file. | |
861 | frecord-gcc-switches | |
862 | Common Report Var(flag_record_gcc_switches) | |
863 | Record gcc command line switches in the object file. | |
864 | ||
1e06725a | 865 | freg-struct-return |
87c75316 | 866 | Common Report Var(flag_pcc_struct_return,0) VarExists Optimization |
72528c71 | 867 | Return small aggregates in registers |
1e06725a | 868 | |
ecdb6d1a | 869 | fregmove |
87c75316 | 870 | Common Report Var(flag_regmove) Optimization |
72528c71 | 871 | Enables a register move optimization |
ecdb6d1a | 872 | |
873 | frename-registers | |
87c75316 | 874 | Common Report Var(flag_rename_registers) Init(2) Optimization |
72528c71 | 875 | Perform a register renaming optimization pass |
ecdb6d1a | 876 | |
877 | freorder-blocks | |
87c75316 | 878 | Common Report Var(flag_reorder_blocks) Optimization |
72528c71 | 879 | Reorder basic blocks to improve code placement |
ecdb6d1a | 880 | |
4f18499c | 881 | freorder-blocks-and-partition |
87c75316 | 882 | Common Report Var(flag_reorder_blocks_and_partition) Optimization |
4f18499c | 883 | Reorder basic blocks and partition into hot and cold sections |
884 | ||
ecdb6d1a | 885 | freorder-functions |
87c75316 | 886 | Common Report Var(flag_reorder_functions) Optimization |
72528c71 | 887 | Reorder functions to improve code placement |
ecdb6d1a | 888 | |
1e06725a | 889 | frerun-cse-after-loop |
87c75316 | 890 | Common Report Var(flag_rerun_cse_after_loop) Init(2) Optimization |
72528c71 | 891 | Add a common subexpression elimination pass after loop optimizations |
1e06725a | 892 | |
4f87b914 | 893 | frerun-loop-opt |
894 | Common | |
334ec2d8 | 895 | Does nothing. Preserved for backward compatibility. |
4f87b914 | 896 | |
5466f589 | 897 | frounding-math |
87c75316 | 898 | Common Report Var(flag_rounding_math) Optimization |
5466f589 | 899 | Disable optimizations that assume default FP rounding behavior |
900 | ||
ecdb6d1a | 901 | fsched-interblock |
87c75316 | 902 | Common Report Var(flag_schedule_interblock) Init(1) Optimization |
72528c71 | 903 | Enable scheduling across basic blocks |
ecdb6d1a | 904 | |
905 | fsched-spec | |
87c75316 | 906 | Common Report Var(flag_schedule_speculative) Init(1) Optimization |
72528c71 | 907 | Allow speculative motion of non-loads |
ecdb6d1a | 908 | |
909 | fsched-spec-load | |
87c75316 | 910 | Common Report Var(flag_schedule_speculative_load) Optimization |
72528c71 | 911 | Allow speculative motion of some loads |
ecdb6d1a | 912 | |
913 | fsched-spec-load-dangerous | |
87c75316 | 914 | Common Report Var(flag_schedule_speculative_load_dangerous) Optimization |
72528c71 | 915 | Allow speculative motion of more loads |
ecdb6d1a | 916 | |
1e06725a | 917 | fsched-verbose= |
918 | Common RejectNegative Joined | |
53b8e5c1 | 919 | -fsched-verbose=<number> Set the verbosity level of the scheduler |
1e06725a | 920 | |
ecdb6d1a | 921 | fsched2-use-superblocks |
87c75316 | 922 | Common Report Var(flag_sched2_use_superblocks) Optimization |
72528c71 | 923 | If scheduling post reload, do superblock scheduling |
ecdb6d1a | 924 | |
925 | fsched2-use-traces | |
87c75316 | 926 | Common Report Var(flag_sched2_use_traces) Optimization |
72528c71 | 927 | If scheduling post reload, do trace scheduling |
ecdb6d1a | 928 | |
1e06725a | 929 | fschedule-insns |
87c75316 | 930 | Common Report Var(flag_schedule_insns) Optimization |
72528c71 | 931 | Reschedule instructions before register allocation |
1e06725a | 932 | |
933 | fschedule-insns2 | |
87c75316 | 934 | Common Report Var(flag_schedule_insns_after_reload) Optimization |
72528c71 | 935 | Reschedule instructions after register allocation |
1e06725a | 936 | |
82a16202 | 937 | ; sched_stalled_insns means that insns can be moved prematurely from the queue |
938 | ; of stalled insns into the ready list. | |
52c4b43f | 939 | fsched-stalled-insns |
46f8e3b0 | 940 | Common Report Var(flag_sched_stalled_insns) Optimization UInteger |
52c4b43f | 941 | Allow premature scheduling of queued insns |
942 | ||
943 | fsched-stalled-insns= | |
a0c938f0 | 944 | Common RejectNegative Joined UInteger |
98b93ebb | 945 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled |
52c4b43f | 946 | |
82a16202 | 947 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will |
948 | ; be examined for a dependency on a stalled insn that is candidate for | |
949 | ; premature removal from the queue of stalled insns into the ready list (has | |
950 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
52c4b43f | 951 | fsched-stalled-insns-dep |
46f8e3b0 | 952 | Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger |
52c4b43f | 953 | Set dependence distance checking in premature scheduling of queued insns |
954 | ||
955 | fsched-stalled-insns-dep= | |
956 | Common RejectNegative Joined UInteger | |
98b93ebb | 957 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns |
52c4b43f | 958 | |
f2d0e9f1 | 959 | fsection-anchors |
87c75316 | 960 | Common Report Var(flag_section_anchors) Optimization |
f2d0e9f1 | 961 | Access data in the same section from shared anchor points |
962 | ||
89140b26 | 963 | frtl-abstract-sequences |
87c75316 | 964 | Common Report Var(flag_rtl_seqabstr) Optimization |
89140b26 | 965 | Perform sequence abstraction optimization on RTL |
966 | ||
2b74c150 | 967 | fsee |
968 | Common Report Var(flag_see) Init(0) | |
969 | Eliminate redundant sign extensions using LCM. | |
970 | ||
5fd4bf3b | 971 | fshow-column |
3df4c876 | 972 | Common C ObjC C++ ObjC++ Report Var(flag_show_column) Init(0) |
973 | Show column numbers in diagnostics, when available. Default off | |
5fd4bf3b | 974 | |
ecdb6d1a | 975 | fsignaling-nans |
87c75316 | 976 | Common Report Var(flag_signaling_nans) Optimization |
72528c71 | 977 | Disable optimizations observable by IEEE signaling NaNs |
ecdb6d1a | 978 | |
893038cd | 979 | fsigned-zeros |
e8831472 | 980 | Common Report Var(flag_signed_zeros) Init(1) Optimization |
893038cd | 981 | Disable floating point optimizations that ignore the IEEE signedness of zero |
982 | ||
ecdb6d1a | 983 | fsingle-precision-constant |
87c75316 | 984 | Common Report Var(flag_single_precision_constant) Optimization |
72528c71 | 985 | Convert floating point constants to single precision constants |
ecdb6d1a | 986 | |
a9989fb4 | 987 | fsplit-ivs-in-unroller |
87c75316 | 988 | Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization |
3284a242 | 989 | Split lifetimes of induction variables when loops are unrolled |
a9989fb4 | 990 | |
1a6a0f2a | 991 | fsplit-wide-types |
e8831472 | 992 | Common Report Var(flag_split_wide_types) Optimization |
1a6a0f2a | 993 | Split wide types into independent registers |
994 | ||
375bb675 | 995 | fvariable-expansion-in-unroller |
87c75316 | 996 | Common Report Var(flag_variable_expansion_in_unroller) Optimization |
3284a242 | 997 | Apply variable expansion when loops are unrolled |
375bb675 | 998 | |
4852b829 | 999 | fstack-check= |
1000 | Common Report RejectNegative Joined | |
1001 | -fstack-check=[no|generic|specific] Insert stack checking code into the program | |
1002 | ||
ecdb6d1a | 1003 | fstack-check |
4852b829 | 1004 | Common Report |
1005 | Insert stack checking code into the program. Same as -fstack-check=specific | |
ecdb6d1a | 1006 | |
1e06725a | 1007 | fstack-limit |
1008 | Common | |
1009 | ||
941a4893 | 1010 | fstack-limit-register= |
1011 | Common RejectNegative Joined | |
53b8e5c1 | 1012 | -fstack-limit-register=<register> Trap if the stack goes past <register> |
941a4893 | 1013 | |
1014 | fstack-limit-symbol= | |
1015 | Common RejectNegative Joined | |
53b8e5c1 | 1016 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name> |
941a4893 | 1017 | |
f1a0edff | 1018 | fstack-protector |
1019 | Common Report Var(flag_stack_protect, 1) | |
1020 | Use propolice as a stack protection method | |
1021 | ||
1022 | fstack-protector-all | |
1023 | Common Report RejectNegative Var(flag_stack_protect, 2) VarExists | |
1024 | Use a stack protection method for every function | |
1025 | ||
1e06725a | 1026 | fstrength-reduce |
4f87b914 | 1027 | Common |
334ec2d8 | 1028 | Does nothing. Preserved for backward compatibility. |
1e06725a | 1029 | |
82a16202 | 1030 | ; Nonzero if we should do (language-dependent) alias analysis. |
1031 | ; Typically, this analysis will assume that expressions of certain | |
1032 | ; types do not alias expressions of certain other types. Only used | |
1033 | ; if alias analysis (in general) is enabled. | |
ecdb6d1a | 1034 | fstrict-aliasing |
87c75316 | 1035 | Common Report Var(flag_strict_aliasing) Optimization |
72528c71 | 1036 | Assume strict aliasing rules apply |
ecdb6d1a | 1037 | |
981eb798 | 1038 | fstrict-overflow |
1039 | Common Report Var(flag_strict_overflow) | |
1040 | Treat signed overflow as undefined | |
1041 | ||
1e06725a | 1042 | fsyntax-only |
2e9da478 | 1043 | Common Report Var(flag_syntax_only) |
72528c71 | 1044 | Check for syntax errors, then stop |
1e06725a | 1045 | |
ecdb6d1a | 1046 | ftest-coverage |
2e9da478 | 1047 | Common Report Var(flag_test_coverage) |
72528c71 | 1048 | Create data files needed by \"gcov\" |
ecdb6d1a | 1049 | |
1e06725a | 1050 | fthread-jumps |
87c75316 | 1051 | Common Report Var(flag_thread_jumps) Optimization |
72528c71 | 1052 | Perform jump threading optimizations |
1e06725a | 1053 | |
ecdb6d1a | 1054 | ftime-report |
2e9da478 | 1055 | Common Report Var(time_report) |
72528c71 | 1056 | Report the time taken by each compiler pass |
ecdb6d1a | 1057 | |
941a4893 | 1058 | ftls-model= |
1059 | Common Joined RejectNegative | |
53b8e5c1 | 1060 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model |
941a4893 | 1061 | |
56af936e | 1062 | ftoplevel-reorder |
8188ae06 | 1063 | Common Report Var(flag_toplevel_reorder) Init(2) Optimization |
56af936e | 1064 | Reorder top level functions, variables, and asms |
1065 | ||
1e06725a | 1066 | ftracer |
2e9da478 | 1067 | Common Report Var(flag_tracer) |
72528c71 | 1068 | Perform superblock formation via tail duplication |
1e06725a | 1069 | |
82a16202 | 1070 | ; Zero means that floating-point math operations cannot generate a |
1071 | ; (user-visible) trap. This is the case, for example, in nonstop | |
1072 | ; IEEE 754 arithmetic. | |
ecdb6d1a | 1073 | ftrapping-math |
87c75316 | 1074 | Common Report Var(flag_trapping_math) Init(1) Optimization |
72528c71 | 1075 | Assume floating-point operations can trap |
ecdb6d1a | 1076 | |
1077 | ftrapv | |
87c75316 | 1078 | Common Report Var(flag_trapv) Optimization |
72528c71 | 1079 | Trap for signed overflow in addition, subtraction and multiplication |
ecdb6d1a | 1080 | |
4ee9c684 | 1081 | ftree-ccp |
87c75316 | 1082 | Common Report Var(flag_tree_ccp) Optimization |
4ee9c684 | 1083 | Enable SSA-CCP optimization on trees |
1084 | ||
88dbf20f | 1085 | ftree-store-ccp |
87c75316 | 1086 | Common Report Var(flag_tree_store_ccp) Optimization |
88dbf20f | 1087 | Enable SSA-CCP optimization for stores and loads |
1088 | ||
4ee9c684 | 1089 | ftree-ch |
87c75316 | 1090 | Common Report Var(flag_tree_ch) Optimization |
4ee9c684 | 1091 | Enable loop header copying on trees |
1092 | ||
4ee9c684 | 1093 | ftree-copyrename |
87c75316 | 1094 | Common Report Var(flag_tree_copyrename) Optimization |
3284a242 | 1095 | Replace SSA temporaries with better names in copies |
4ee9c684 | 1096 | |
88dbf20f | 1097 | ftree-copy-prop |
87c75316 | 1098 | Common Report Var(flag_tree_copy_prop) Optimization |
88dbf20f | 1099 | Enable copy propagation on trees |
1100 | ||
1101 | ftree-store-copy-prop | |
317d3b82 | 1102 | Common |
578ef723 | 1103 | Does nothing. Preserved for backward compatibility. |
88dbf20f | 1104 | |
e6d0e152 | 1105 | ftree-cselim |
1106 | Common Report Var(flag_tree_cselim) Init(2) Optimization | |
1107 | Transform condition stores into unconditional ones | |
1108 | ||
a347af29 | 1109 | ftree-switch-conversion |
1110 | Common Report Var(flag_tree_switch_conversion) Optimization | |
1111 | Perform conversions of switch initializations. | |
1112 | ||
4ee9c684 | 1113 | ftree-dce |
87c75316 | 1114 | Common Report Var(flag_tree_dce) Optimization |
4ee9c684 | 1115 | Enable SSA dead code elimination optimization on trees |
1116 | ||
1117 | ftree-dominator-opts | |
87c75316 | 1118 | Common Report Var(flag_tree_dom) Optimization |
4ee9c684 | 1119 | Enable dominator optimizations |
1120 | ||
1121 | ftree-dse | |
87c75316 | 1122 | Common Report Var(flag_tree_dse) Optimization |
4ee9c684 | 1123 | Enable dead store elimination |
1124 | ||
591c2a30 | 1125 | ftree-fre |
87c75316 | 1126 | Common Report Var(flag_tree_fre) Optimization |
591c2a30 | 1127 | Enable Full Redundancy Elimination (FRE) on trees |
1128 | ||
801c5610 | 1129 | ftree-loop-distribution |
2b945500 | 1130 | Common Report Var(flag_tree_loop_distribution) Optimization |
801c5610 | 1131 | Enable loop distribution on trees |
1132 | ||
41b5cc78 | 1133 | ftree-loop-im |
87c75316 | 1134 | Common Report Var(flag_tree_loop_im) Init(1) Optimization |
7d23383d | 1135 | Enable loop invariant motion on trees |
1136 | ||
60cfcb79 | 1137 | ftree-loop-linear |
87c75316 | 1138 | Common Report Var(flag_tree_loop_linear) Optimization |
60cfcb79 | 1139 | Enable linear loop transforms on trees |
1140 | ||
41b5cc78 | 1141 | ftree-loop-ivcanon |
87c75316 | 1142 | Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization |
41b5cc78 | 1143 | Create canonical induction variables in loops |
1144 | ||
dcb9eccb | 1145 | ftree-loop-optimize |
87c75316 | 1146 | Common Report Var(flag_tree_loop_optimize) Init(1) Optimization |
dcb9eccb | 1147 | Enable loop optimizations on tree level |
1148 | ||
28c92cbb | 1149 | ftree-parallelize-loops= |
1150 | Common Report Joined UInteger Var(flag_tree_parallelize_loops) Init(1) | |
1151 | Enable automatic parallelization of loops | |
1152 | ||
4ee9c684 | 1153 | ftree-pre |
87c75316 | 1154 | Common Report Var(flag_tree_pre) Optimization |
4ee9c684 | 1155 | Enable SSA-PRE optimization on trees |
1156 | ||
621a93b1 | 1157 | ftree-reassoc |
1158 | Common Report Var(flag_tree_reassoc) Init(1) Optimization | |
1159 | Enable reassociation on tree level | |
1160 | ||
2be14d8b | 1161 | ftree-salias |
70393469 | 1162 | Common |
1163 | Does nothing. Preserved for backward compatibility. | |
2be14d8b | 1164 | |
5e733b02 | 1165 | ftree-sink |
87c75316 | 1166 | Common Report Var(flag_tree_sink) Optimization |
5e733b02 | 1167 | Enable SSA code sinking on trees |
1168 | ||
4ee9c684 | 1169 | ftree-sra |
87c75316 | 1170 | Common Report Var(flag_tree_sra) Optimization |
4ee9c684 | 1171 | Perform scalar replacement of aggregates |
1172 | ||
1173 | ftree-ter | |
bff4202c | 1174 | Common Report Var(flag_tree_ter) Init(1) Optimization |
4ee9c684 | 1175 | Replace temporary expressions in the SSA->normal pass |
1176 | ||
87c75316 | 1177 | ftree-lrs |
1178 | Common Report Var(flag_tree_live_range_split) Optimization | |
1179 | Perform live range splitting during the SSA->normal pass | |
1180 | ||
88dbf20f | 1181 | ftree-vrp |
87c75316 | 1182 | Common Report Var(flag_tree_vrp) Init(0) Optimization |
88dbf20f | 1183 | Perform Value Range Propagation on trees |
1184 | ||
1e06725a | 1185 | funit-at-a-time |
8188ae06 | 1186 | Common Report Var(flag_unit_at_a_time) Init(1) Optimization |
72528c71 | 1187 | Compile whole compilation unit at a time |
1e06725a | 1188 | |
1189 | funroll-loops | |
87c75316 | 1190 | Common Report Var(flag_unroll_loops) Optimization |
72528c71 | 1191 | Perform loop unrolling when iteration count is known |
1e06725a | 1192 | |
1193 | funroll-all-loops | |
87c75316 | 1194 | Common Report Var(flag_unroll_all_loops) Optimization |
72528c71 | 1195 | Perform loop unrolling for all loops |
1e06725a | 1196 | |
7e3cc681 | 1197 | ; Nonzero means that loop optimizer may assume that the induction variables |
1198 | ; that control loops do not overflow and that the loops with nontrivial | |
1199 | ; exit condition are not infinite | |
1200 | funsafe-loop-optimizations | |
87c75316 | 1201 | Common Report Var(flag_unsafe_loop_optimizations) Optimization |
7e3cc681 | 1202 | Allow loop optimizations to assume that the loops behave in normal way |
1203 | ||
49d060d7 | 1204 | fassociative-math |
1205 | Common Report Var(flag_associative_math) | |
1206 | Allow optimization for floating-point arithmetic which may change the | |
1207 | result of the operation due to rounding. | |
1208 | ||
1209 | freciprocal-math | |
1210 | Common Report Var(flag_reciprocal_math) | |
1211 | Same as -fassociative-math for expressions which include division. | |
1212 | ||
82a16202 | 1213 | ; Nonzero means that unsafe floating-point math optimizations are allowed |
1214 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
1215 | ; are allowed to assume that their arguments and results are "normal" | |
1216 | ; (e.g., nonnegative for SQRT). | |
ecdb6d1a | 1217 | funsafe-math-optimizations |
87c75316 | 1218 | Common Report Var(flag_unsafe_math_optimizations) Optimization |
72528c71 | 1219 | Allow math optimizations that may violate IEEE or ISO standards |
ecdb6d1a | 1220 | |
1e06725a | 1221 | funswitch-loops |
87c75316 | 1222 | Common Report Var(flag_unswitch_loops) Optimization |
72528c71 | 1223 | Perform loop unswitching |
1e06725a | 1224 | |
ecdb6d1a | 1225 | funwind-tables |
87c75316 | 1226 | Common Report Var(flag_unwind_tables) Optimization |
72528c71 | 1227 | Just generate unwind tables for exception handling |
ecdb6d1a | 1228 | |
5923a5e7 | 1229 | fvar-tracking |
87c75316 | 1230 | Common Report Var(flag_var_tracking) VarExists Optimization |
5923a5e7 | 1231 | Perform variable tracking |
1232 | ||
d53bb226 | 1233 | fvar-tracking-uninit |
1234 | Common Report Var(flag_var_tracking_uninit) Optimization | |
1235 | Perform variable tracking and also tag variables that are uninitialized | |
1236 | ||
c91e8223 | 1237 | ftree-vectorize |
87c75316 | 1238 | Common Report Var(flag_tree_vectorize) Optimization |
c91e8223 | 1239 | Enable loop vectorization on trees |
1240 | ||
867c03eb | 1241 | fvect-cost-model |
1242 | Common Report Var(flag_vect_cost_model) Optimization | |
1243 | Enable use of cost model in vectorization | |
1244 | ||
25e3c2e8 | 1245 | ftree-vect-loop-version |
87c75316 | 1246 | Common Report Var(flag_tree_vect_loop_version) Init(1) Optimization |
25e3c2e8 | 1247 | Enable loop versioning when doing loop vectorization on trees |
1248 | ||
459e8543 | 1249 | ftree-vectorizer-verbose= |
1250 | Common RejectNegative Joined | |
98b93ebb | 1251 | -ftree-vectorizer-verbose=<number> Set the verbosity level of the vectorizer |
459e8543 | 1252 | |
2a6e95ba | 1253 | ftree-scev-cprop |
e8831472 | 1254 | Common Report Var(flag_tree_scev_cprop) Init(1) Optimization |
2a6e95ba | 1255 | Enable copy propagation of scalar-evolution information. |
1256 | ||
82a16202 | 1257 | ; -fverbose-asm causes extra commentary information to be produced in |
1258 | ; the generated assembly code (to make it more readable). This option | |
1259 | ; is generally only of use to those who actually need to read the | |
1260 | ; generated assembly code (perhaps while debugging the compiler itself). | |
1261 | ; -fno-verbose-asm, the default, causes the extra information | |
1262 | ; to not be added and is useful when comparing two assembler files. | |
ecdb6d1a | 1263 | fverbose-asm |
2e9da478 | 1264 | Common Report Var(flag_verbose_asm) |
72528c71 | 1265 | Add extra commentary to assembler output |
ecdb6d1a | 1266 | |
b212f378 | 1267 | fvisibility= |
1268 | Common Joined RejectNegative | |
1269 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility | |
1270 | ||
1271 | ||
1c6a7b8c | 1272 | fvpt |
87c75316 | 1273 | Common Report Var(flag_value_profile_transformations) Optimization |
1c6a7b8c | 1274 | Use expression value profiles in optimizations |
1275 | ||
eeb4a70e | 1276 | fweb |
87c75316 | 1277 | Common Report Var(flag_web) Init(2) Optimization |
eeb4a70e | 1278 | Construct webs and split unrelated uses of single variable |
1279 | ||
e6a23add | 1280 | ftree-builtin-call-dce |
1281 | Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization | |
1282 | Enable conditional dead code elimination for builtin calls | |
1283 | ||
62eec3b4 | 1284 | fwhole-program |
87c75316 | 1285 | Common Report Var(flag_whole_program) Init(0) Optimization |
62eec3b4 | 1286 | Perform whole program optimizations |
1287 | ||
ecdb6d1a | 1288 | fwrapv |
87c75316 | 1289 | Common Report Var(flag_wrapv) Optimization |
72528c71 | 1290 | Assume signed arithmetic overflow wraps around |
ecdb6d1a | 1291 | |
ecdb6d1a | 1292 | fzero-initialized-in-bss |
2e9da478 | 1293 | Common Report Var(flag_zero_initialized_in_bss) Init(1) |
72528c71 | 1294 | Put zero initialized data in the bss section |
ecdb6d1a | 1295 | |
6f2f567f | 1296 | g |
1297 | Common JoinedOrMissing | |
b0e56fb1 | 1298 | Generate debug information in default format |
1299 | ||
1300 | gcoff | |
a1baa5f1 | 1301 | Common JoinedOrMissing Negative(gdwarf-2) |
b0e56fb1 | 1302 | Generate debug information in COFF format |
1303 | ||
b0e56fb1 | 1304 | gdwarf-2 |
a1baa5f1 | 1305 | Common JoinedOrMissing Negative(gstabs) |
b0e56fb1 | 1306 | Generate debug information in DWARF v2 format |
1307 | ||
1308 | ggdb | |
1309 | Common JoinedOrMissing | |
1310 | Generate debug information in default extended format | |
1311 | ||
1312 | gstabs | |
a1baa5f1 | 1313 | Common JoinedOrMissing Negative(gstabs+) |
b0e56fb1 | 1314 | Generate debug information in STABS format |
1315 | ||
1316 | gstabs+ | |
a1baa5f1 | 1317 | Common JoinedOrMissing Negative(gvms) |
b0e56fb1 | 1318 | Generate debug information in extended STABS format |
1319 | ||
1320 | gvms | |
a1baa5f1 | 1321 | Common JoinedOrMissing Negative(gxcoff) |
b0e56fb1 | 1322 | Generate debug information in VMS format |
1323 | ||
1324 | gxcoff | |
a1baa5f1 | 1325 | Common JoinedOrMissing Negative(gxcoff+) |
b0e56fb1 | 1326 | Generate debug information in XCOFF format |
1327 | ||
1328 | gxcoff+ | |
a1baa5f1 | 1329 | Common JoinedOrMissing Negative(gcoff) |
b0e56fb1 | 1330 | Generate debug information in extended XCOFF format |
6f2f567f | 1331 | |
e690b385 | 1332 | o |
1333 | Common Joined Separate | |
53b8e5c1 | 1334 | -o <file> Place output into <file> |
e690b385 | 1335 | |
1336 | p | |
2e9da478 | 1337 | Common Var(profile_flag) |
53b8e5c1 | 1338 | Enable function profiling |
e690b385 | 1339 | |
1340 | pedantic | |
2e9da478 | 1341 | Common Var(pedantic) |
53b8e5c1 | 1342 | Issue warnings needed for strict compliance to the standard |
e690b385 | 1343 | |
1344 | pedantic-errors | |
1345 | Common | |
53b8e5c1 | 1346 | Like -pedantic but issue them as errors |
e690b385 | 1347 | |
3272db82 | 1348 | quiet |
2e9da478 | 1349 | Common Var(quiet_flag) |
53b8e5c1 | 1350 | Do not display functions compiled or elapsed time |
3272db82 | 1351 | |
e690b385 | 1352 | version |
2e9da478 | 1353 | Common Var(version_flag) |
53b8e5c1 | 1354 | Display the compiler's version |
e690b385 | 1355 | |
1356 | w | |
2e9da478 | 1357 | Common Var(inhibit_warnings) |
53b8e5c1 | 1358 | Suppress warnings |
e690b385 | 1359 | |
794febf8 | 1360 | shared |
1361 | Common RejectNegative Negative(pie) | |
1362 | Create a shared library | |
1363 | ||
1364 | pie | |
1365 | Common RejectNegative Negative(shared) | |
1366 | Create a position independent executable | |
1367 | ||
3272db82 | 1368 | ; This comment is to ensure we retain the blank line above. |