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Commit | Line | Data |
---|---|---|
d7b42618 | 1 | ; Options for the language- and target-independent parts of the compiler. |
50431bc4 | 2 | |
e53a16e7 | 3 | ; Copyright (C) 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
d7b42618 NB |
4 | ; |
5 | ; This file is part of GCC. | |
6 | ; | |
7 | ; GCC is free software; you can redistribute it and/or modify it under | |
8 | ; the terms of the GNU General Public License as published by the Free | |
9 | ; Software Foundation; either version 2, or (at your option) any later | |
10 | ; version. | |
c22cacf3 | 11 | ; |
d7b42618 NB |
12 | ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | ; WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | ; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | ; for more details. | |
c22cacf3 | 16 | ; |
d7b42618 NB |
17 | ; You should have received a copy of the GNU General Public License |
18 | ; along with GCC; see the file COPYING. If not, write to the Free | |
366ccddb KC |
19 | ; Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
20 | ; 02110-1301, USA. | |
d7b42618 | 21 | |
8abb6b22 | 22 | ; See the GCC internals manual for a description of this file's format. |
d7b42618 NB |
23 | |
24 | ; Please try to keep this file in ASCII collating order. | |
25 | ||
d185d268 NB |
26 | -help |
27 | Common | |
cf03fd63 | 28 | Display this information |
d185d268 | 29 | |
c662432e NC |
30 | -help= |
31 | Common Report Joined | |
32 | --help=<class> Display descriptions of a specific class of options. <class> is one or more of optimizers, target, warnings, undocumented, params | |
903caebf | 33 | |
d185d268 NB |
34 | -target-help |
35 | Common | |
c662432e NC |
36 | Alias for --help=target |
37 | ||
38 | ;; The following three entries are to work around the gcc driver | |
39 | ;; program's insatiable desire to turn options starting with a | |
40 | ;; double dash (--) into options starting with a dash f (-f). | |
41 | fhelp | |
42 | Common | |
43 | ||
44 | fhelp= | |
45 | Common Joined | |
46 | ||
47 | ftarget-help | |
48 | Common | |
49 | ||
50 | -param | |
51 | Common Separate | |
52 | --param <param>=<value> Set parameter <param> to value. See below for a complete list of parameters | |
d185d268 NB |
53 | |
54 | -version | |
55 | Common | |
56 | ||
57 | G | |
7b086b11 | 58 | Common Joined Separate UInteger |
cf03fd63 | 59 | -G<number> Put global and static data smaller than <number> bytes into a special section (on some targets) |
d185d268 | 60 | |
903caebf NB |
61 | O |
62 | Common JoinedOrMissing | |
cf03fd63 | 63 | -O<number> Set optimization level to <number> |
903caebf NB |
64 | |
65 | Os | |
66 | Common | |
cf03fd63 | 67 | Optimize for space rather than speed |
903caebf NB |
68 | |
69 | W | |
70 | Common RejectNegative | |
28786366 | 71 | This switch is deprecated; use -Wextra instead |
903caebf | 72 | |
e01cc6dc | 73 | Waggregate-return |
c662432e | 74 | Common Var(warn_aggregate_return) Warning |
28786366 | 75 | Warn about returning structures, unions or arrays |
e01cc6dc | 76 | |
590b1f2d | 77 | Warray-bounds |
21af5cdf | 78 | Common Var(warn_array_bounds) Warning |
590b1f2d DM |
79 | Warn if an array is accessed out of bounds |
80 | ||
5c498b10 | 81 | Wattributes |
c662432e | 82 | Common Var(warn_attributes) Init(1) Warning |
5c498b10 DD |
83 | Warn about inappropriate attribute usage |
84 | ||
e01cc6dc | 85 | Wcast-align |
c662432e | 86 | Common Var(warn_cast_align) Warning |
28786366 | 87 | Warn about pointer casts which increase alignment |
e01cc6dc NB |
88 | |
89 | Wdeprecated-declarations | |
c662432e | 90 | Common Var(warn_deprecated_decl) Init(1) Warning |
28786366 | 91 | Warn about uses of __attribute__((deprecated)) declarations |
e01cc6dc NB |
92 | |
93 | Wdisabled-optimization | |
c662432e | 94 | Common Var(warn_disabled_optimization) Warning |
28786366 | 95 | Warn when an optimization pass is disabled |
e01cc6dc NB |
96 | |
97 | Werror | |
50431bc4 | 98 | Common Var(warnings_are_errors) |
28786366 | 99 | Treat all warnings as errors |
e01cc6dc | 100 | |
79cf5994 DD |
101 | Werror= |
102 | Common Joined | |
103 | Treat specified warning as error | |
104 | ||
903caebf | 105 | Wextra |
c662432e | 106 | Common Warning |
cf03fd63 | 107 | Print extra (possibly unwanted) warnings |
903caebf | 108 | |
c65a01af | 109 | Wfatal-errors |
50431bc4 | 110 | Common Var(flag_fatal_errors) |
c65a01af RG |
111 | Exit on the first error occurred |
112 | ||
e01cc6dc | 113 | Winline |
c662432e | 114 | Common Var(warn_inline) Warning |
28786366 | 115 | Warn when an inlined function cannot be inlined |
e01cc6dc NB |
116 | |
117 | Wlarger-than- | |
c662432e | 118 | Common RejectNegative Joined UInteger Warning |
cf03fd63 | 119 | -Wlarger-than-<number> Warn if an object is larger than <number> bytes |
e01cc6dc | 120 | |
f9cc1a70 | 121 | Wunsafe-loop-optimizations |
c662432e | 122 | Common Var(warn_unsafe_loop_optimizations) Warning |
f9cc1a70 PB |
123 | Warn if the loop cannot be optimized due to nontrivial assumptions. |
124 | ||
e01cc6dc | 125 | Wmissing-noreturn |
c662432e | 126 | Common Var(warn_missing_noreturn) Warning |
28786366 | 127 | Warn about functions which might be candidates for __attribute__((noreturn)) |
e01cc6dc | 128 | |
71834ad3 | 129 | Woverflow |
c662432e | 130 | Common Var(warn_overflow) Init(1) Warning |
71834ad3 RS |
131 | Warn about overflow in arithmetic expressions |
132 | ||
e01cc6dc | 133 | Wpacked |
c662432e | 134 | Common Var(warn_packed) Warning |
28786366 | 135 | Warn when the packed attribute has no effect on struct layout |
e01cc6dc NB |
136 | |
137 | Wpadded | |
c662432e | 138 | Common Var(warn_padded) Warning |
28786366 | 139 | Warn when padding is required to align structure members |
e01cc6dc NB |
140 | |
141 | Wshadow | |
c662432e | 142 | Common Var(warn_shadow) Warning |
28786366 | 143 | Warn when one local variable shadows another |
e01cc6dc | 144 | |
7d69de61 | 145 | Wstack-protector |
c662432e | 146 | Common Var(warn_stack_protect) Warning |
7d69de61 RH |
147 | Warn when not issuing stack smashing protection for some reason |
148 | ||
e01cc6dc | 149 | Wstrict-aliasing |
c662432e | 150 | Common Warning |
28786366 | 151 | Warn about code which might break strict aliasing rules |
e01cc6dc | 152 | |
5399d643 | 153 | Wstrict-aliasing= |
c662432e | 154 | Common Joined UInteger Warning |
5399d643 JW |
155 | Warn about code which might break strict aliasing rules |
156 | ||
6ac01510 | 157 | Wstrict-overflow |
21af5cdf | 158 | Common Warning |
6ac01510 ILT |
159 | Warn about optimizations that assume that signed overflow is undefined |
160 | ||
161 | Wstrict-overflow= | |
21af5cdf | 162 | Common Joined UInteger Warning |
6ac01510 ILT |
163 | Warn about optimizations that assume that signed overflow is undefined |
164 | ||
e01cc6dc | 165 | Wswitch |
c662432e | 166 | Common Var(warn_switch) Warning |
28786366 | 167 | Warn about enumerated switches, with no default, missing a case |
e01cc6dc NB |
168 | |
169 | Wswitch-default | |
c662432e | 170 | Common Var(warn_switch_default) Warning |
28786366 | 171 | Warn about enumerated switches missing a \"default:\" statement |
e01cc6dc NB |
172 | |
173 | Wswitch-enum | |
c662432e | 174 | Common Var(warn_switch_enum) Warning |
28786366 | 175 | Warn about all enumerated switches missing a specific case |
e01cc6dc NB |
176 | |
177 | Wsystem-headers | |
c662432e | 178 | Common Var(warn_system_headers) Warning |
f3fdaec4 | 179 | Do not suppress warnings from system headers |
e01cc6dc NB |
180 | |
181 | Wuninitialized | |
c662432e | 182 | Common Var(warn_uninitialized) Warning |
28786366 | 183 | Warn about uninitialized automatic variables |
e01cc6dc NB |
184 | |
185 | Wunreachable-code | |
c662432e | 186 | Common Var(warn_notreached) Warning |
28786366 | 187 | Warn about code that will never be executed |
e01cc6dc | 188 | |
903caebf | 189 | Wunused |
c662432e | 190 | Common Warning |
cf03fd63 | 191 | Enable all -Wunused- warnings |
903caebf | 192 | |
e01cc6dc | 193 | Wunused-function |
c662432e | 194 | Common Var(warn_unused_function) Warning |
28786366 | 195 | Warn when a function is unused |
e01cc6dc NB |
196 | |
197 | Wunused-label | |
c662432e | 198 | Common Var(warn_unused_label) Warning |
28786366 | 199 | Warn when a label is unused |
e01cc6dc NB |
200 | |
201 | Wunused-parameter | |
c662432e | 202 | Common Var(warn_unused_parameter) Warning |
28786366 | 203 | Warn when a function parameter is unused |
e01cc6dc NB |
204 | |
205 | Wunused-value | |
c662432e | 206 | Common Var(warn_unused_value) Warning |
28786366 | 207 | Warn when an expression value is unused |
e01cc6dc NB |
208 | |
209 | Wunused-variable | |
c662432e | 210 | Common Var(warn_unused_variable) Warning |
28786366 | 211 | Warn when a variable is unused |
e01cc6dc | 212 | |
d35a40fc | 213 | Wvolatile-register-var |
c662432e | 214 | Common Var(warn_register_var) Warning |
d35a40fc DE |
215 | Warn when a register variable is declared volatile |
216 | ||
16c1c158 | 217 | Wcoverage-mismatch |
21af5cdf | 218 | Common RejectNegative Var(warn_coverage_mismatch) Warning |
16c1c158 RG |
219 | Warn instead of error in case profiles in -fprofile-use do not match |
220 | ||
d185d268 NB |
221 | aux-info |
222 | Common Separate | |
cf03fd63 | 223 | -aux-info <file> Emit declaration information into <file> |
d185d268 NB |
224 | |
225 | aux-info= | |
226 | Common Joined | |
227 | ||
228 | auxbase | |
229 | Common Separate | |
230 | ||
231 | auxbase-strip | |
232 | Common Separate | |
233 | ||
234 | d | |
235 | Common Joined | |
cf03fd63 | 236 | -d<letters> Enable dumps from specific passes of the compiler |
d185d268 NB |
237 | |
238 | dumpbase | |
239 | Common Separate | |
cf03fd63 | 240 | -dumpbase <file> Set the file basename to be used for dumps |
d185d268 | 241 | |
31b66477 KC |
242 | ; The version of the C++ ABI in use. The following values are allowed: |
243 | ; | |
244 | ; 0: The version of the ABI believed most conformant with the C++ ABI | |
245 | ; specification. This ABI may change as bugs are discovered and fixed. | |
246 | ; Therefore, 0 will not necessarily indicate the same ABI in different | |
247 | ; versions of G++. | |
248 | ; | |
249 | ; 1: The version of the ABI first used in G++ 3.2. | |
250 | ; | |
251 | ; Additional positive integers will be assigned as new versions of | |
252 | ; the ABI become the default version of the ABI. | |
57782ad8 | 253 | fabi-version= |
50431bc4 | 254 | Common Joined UInteger Var(flag_abi_version) Init(2) |
57782ad8 | 255 | |
6ff3a151 | 256 | falign-functions |
50431bc4 | 257 | Common Report Var(align_functions,0) |
f3fdaec4 | 258 | Align the start of functions |
6ff3a151 | 259 | |
058de654 NB |
260 | falign-functions= |
261 | Common RejectNegative Joined UInteger | |
262 | ||
6ff3a151 | 263 | falign-jumps |
c662432e | 264 | Common Report Var(align_jumps,0) Optimization |
f3fdaec4 | 265 | Align labels which are only reached by jumping |
6ff3a151 | 266 | |
058de654 NB |
267 | falign-jumps= |
268 | Common RejectNegative Joined UInteger | |
269 | ||
6ff3a151 | 270 | falign-labels |
c662432e | 271 | Common Report Var(align_labels,0) Optimization |
f3fdaec4 | 272 | Align all labels |
6ff3a151 | 273 | |
058de654 NB |
274 | falign-labels= |
275 | Common RejectNegative Joined UInteger | |
276 | ||
6ff3a151 | 277 | falign-loops |
c662432e | 278 | Common Report Var(align_loops) Optimization |
f3fdaec4 | 279 | Align the start of loops |
6ff3a151 | 280 | |
058de654 NB |
281 | falign-loops= |
282 | Common RejectNegative Joined UInteger | |
283 | ||
31b66477 KC |
284 | ; This flag is only tested if alias checking is enabled. |
285 | ; 0 if pointer arguments may alias each other. True in C. | |
286 | ; 1 if pointer arguments may not alias each other but may alias | |
287 | ; global variables. | |
288 | ; 2 if pointer arguments may not alias each other and may not | |
0698a1d2 TM |
289 | ; alias global variables. |
290 | ; 3 if pointer arguments may not alias anything. True in Fortran. | |
291 | ; Set by the front end. | |
6ff3a151 | 292 | fargument-alias |
c662432e | 293 | Common Report Var(flag_argument_noalias,0) Optimization |
f3fdaec4 | 294 | Specify that arguments may alias each other and globals |
6ff3a151 NB |
295 | |
296 | fargument-noalias | |
c662432e | 297 | Common Report Var(flag_argument_noalias,1) VarExists Optimization |
f3fdaec4 | 298 | Assume arguments may alias globals but not each other |
6ff3a151 NB |
299 | |
300 | fargument-noalias-global | |
c662432e | 301 | Common Report Var(flag_argument_noalias,2) VarExists Optimization |
f3fdaec4 | 302 | Assume arguments alias neither each other nor globals |
6ff3a151 | 303 | |
0698a1d2 | 304 | fargument-noalias-anything |
c662432e | 305 | Common Report Var(flag_argument_noalias,3) VarExists Optimization |
0698a1d2 TM |
306 | Assume arguments alias no other storage |
307 | ||
6ff3a151 | 308 | fasynchronous-unwind-tables |
c662432e | 309 | Common Report Var(flag_asynchronous_unwind_tables) Optimization |
f3fdaec4 | 310 | Generate unwind tables that are exact at each instruction boundary |
6ff3a151 | 311 | |
31b66477 KC |
312 | ; -fcheck-bounds causes gcc to generate array bounds checks. |
313 | ; For C, C++ and ObjC: defaults off. | |
314 | ; For Java: defaults to on. | |
315 | ; For Fortran: defaults to off. | |
6ff3a151 | 316 | fbounds-check |
50431bc4 | 317 | Common Report Var(flag_bounds_check) |
f3fdaec4 | 318 | Generate code to check bounds before indexing arrays |
6ff3a151 NB |
319 | |
320 | fbranch-count-reg | |
c662432e | 321 | Common Report Var(flag_branch_on_count_reg) Init(1) Optimization |
f3fdaec4 | 322 | Replace add, compare, branch with branch on count register |
6ff3a151 NB |
323 | |
324 | fbranch-probabilities | |
c662432e | 325 | Common Report Var(flag_branch_probabilities) Optimization |
f3fdaec4 | 326 | Use profiling information for branch probabilities |
6ff3a151 | 327 | |
de32c0cb | 328 | fbranch-target-load-optimize |
c662432e | 329 | Common Report Var(flag_branch_target_load_optimize) Optimization |
f3fdaec4 | 330 | Perform branch target load optimization before prologue / epilogue threading |
de32c0cb NB |
331 | |
332 | fbranch-target-load-optimize2 | |
c662432e | 333 | Common Report Var(flag_branch_target_load_optimize2) Optimization |
f3fdaec4 | 334 | Perform branch target load optimization after prologue / epilogue threading |
de32c0cb | 335 | |
1194fc79 | 336 | fbtr-bb-exclusive |
c662432e | 337 | Common Report Var(flag_btr_bb_exclusive) Optimization |
1194fc79 R |
338 | Restrict target load migration not to re-use registers in any basic block |
339 | ||
058de654 NB |
340 | fcall-saved- |
341 | Common Joined RejectNegative | |
cf03fd63 | 342 | -fcall-saved-<register> Mark <register> as being preserved across functions |
058de654 NB |
343 | |
344 | fcall-used- | |
345 | Common Joined RejectNegative | |
cf03fd63 | 346 | -fcall-used-<register> Mark <register> as being corrupted by function calls |
058de654 | 347 | |
31b66477 KC |
348 | ; Nonzero for -fcaller-saves: allocate values in regs that need to |
349 | ; be saved across function calls, if that produces overall better code. | |
350 | ; Optional now, so people can test it. | |
de32c0cb | 351 | fcaller-saves |
c662432e | 352 | Common Report Var(flag_caller_saves) Optimization |
f3fdaec4 | 353 | Save registers around function calls |
de32c0cb | 354 | |
6ff3a151 | 355 | fcommon |
c662432e | 356 | Common Report Var(flag_no_common,0) Optimization |
f3fdaec4 | 357 | Do not put uninitialized globals in the common section |
6ff3a151 NB |
358 | |
359 | fcprop-registers | |
c662432e | 360 | Common Report Var(flag_cprop_registers) Optimization |
f3fdaec4 | 361 | Perform a register copy-propagation optimization pass |
6ff3a151 | 362 | |
de32c0cb | 363 | fcrossjumping |
c662432e | 364 | Common Report Var(flag_crossjumping) Optimization |
f3fdaec4 | 365 | Perform cross-jumping optimization |
de32c0cb NB |
366 | |
367 | fcse-follow-jumps | |
c662432e | 368 | Common Report Var(flag_cse_follow_jumps) Optimization |
f3fdaec4 | 369 | When running CSE, follow jumps to their targets |
de32c0cb NB |
370 | |
371 | fcse-skip-blocks | |
c662432e | 372 | Common Report Var(flag_cse_skip_blocks) Optimization |
f3fdaec4 | 373 | When running CSE, follow conditional jumps |
de32c0cb | 374 | |
c7463669 | 375 | fcx-limited-range |
c662432e | 376 | Common Report Var(flag_cx_limited_range) Optimization |
c7463669 RH |
377 | Omit range reduction step when performing complex division |
378 | ||
6ff3a151 | 379 | fdata-sections |
c662432e | 380 | Common Report Var(flag_data_sections) Optimization |
f3fdaec4 | 381 | Place data items into their own section |
6ff3a151 | 382 | |
31b66477 KC |
383 | ; Nonzero for -fdefer-pop: don't pop args after each function call |
384 | ; instead save them up to pop many calls' args with one insns. | |
de32c0cb | 385 | fdefer-pop |
c662432e | 386 | Common Report Var(flag_defer_pop) Optimization |
f3fdaec4 | 387 | Defer popping functions args from stack until later |
de32c0cb NB |
388 | |
389 | fdelayed-branch | |
c662432e | 390 | Common Report Var(flag_delayed_branch) Optimization |
f3fdaec4 | 391 | Attempt to fill delay slots of branch instructions |
de32c0cb NB |
392 | |
393 | fdelete-null-pointer-checks | |
c662432e | 394 | Common Report Var(flag_delete_null_pointer_checks) Optimization |
f3fdaec4 | 395 | Delete useless null pointer checks |
de32c0cb NB |
396 | |
397 | fdiagnostics-show-location= | |
398 | Common Joined RejectNegative | |
cf03fd63 | 399 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics |
de32c0cb | 400 | |
ccf08a6e | 401 | fdiagnostics-show-option |
2098fe9e | 402 | Common |
c85ce869 | 403 | Amend appropriate diagnostic messages with the command line option that controls them |
ccf08a6e | 404 | |
6de9cd9a DN |
405 | fdump- |
406 | Common Joined RejectNegative | |
407 | -fdump-<type> Dump various compiler internals to a file | |
408 | ||
24a7799e R |
409 | fdump-noaddr |
410 | Common Report Var(flag_dump_noaddr) | |
411 | Suppress output of addresses in debugging dumps | |
412 | ||
6ff3a151 | 413 | fdump-unnumbered |
50431bc4 | 414 | Common Report Var(flag_dump_unnumbered) VarExists |
24a7799e | 415 | Suppress output of instruction numbers, line number notes and addresses in debugging dumps |
6ff3a151 | 416 | |
355866de | 417 | fearly-inlining |
c662432e | 418 | Common Report Var(flag_early_inlining) Init(1) Optimization |
355866de RG |
419 | Perform early inlining |
420 | ||
de32c0cb | 421 | feliminate-dwarf2-dups |
50431bc4 | 422 | Common Report Var(flag_eliminate_dwarf2_dups) |
f3fdaec4 | 423 | Perform DWARF2 duplicate elimination |
de32c0cb | 424 | |
6a08f7b3 | 425 | feliminate-unused-debug-symbols |
50431bc4 | 426 | Common Report Var(flag_debug_only_used_symbols) |
f3fdaec4 | 427 | Perform unused type elimination in debug info |
6a08f7b3 | 428 | |
de32c0cb | 429 | feliminate-unused-debug-types |
50431bc4 | 430 | Common Report Var(flag_eliminate_unused_debug_types) Init(1) |
f3fdaec4 | 431 | Perform unused type elimination in debug info |
de32c0cb | 432 | |
e713adf6 CD |
433 | femit-class-debug-always |
434 | Common Report Var(flag_emit_class_debug_always) Init(1) | |
435 | Do not suppress C++ class debug information. | |
436 | ||
6ff3a151 | 437 | fexceptions |
c662432e | 438 | Common Report Var(flag_exceptions) Optimization |
f3fdaec4 | 439 | Enable exception handling |
6ff3a151 | 440 | |
de32c0cb | 441 | fexpensive-optimizations |
c662432e | 442 | Common Report Var(flag_expensive_optimizations) Optimization |
f3fdaec4 | 443 | Perform a number of minor, expensive optimizations |
de32c0cb | 444 | |
058de654 NB |
445 | ffast-math |
446 | Common | |
447 | ||
6ff3a151 | 448 | ffinite-math-only |
c662432e | 449 | Common Report Var(flag_finite_math_only) Optimization |
f3fdaec4 | 450 | Assume no NaNs or infinities are generated |
6ff3a151 | 451 | |
058de654 NB |
452 | ffixed- |
453 | Common Joined RejectNegative | |
cf03fd63 | 454 | -ffixed-<register> Mark <register> as being unavailable to the compiler |
058de654 | 455 | |
de32c0cb | 456 | ffloat-store |
c662432e | 457 | Common Report Var(flag_float_store) Optimization |
31b66477 | 458 | Don't allocate floats and doubles in extended-precision registers |
de32c0cb | 459 | |
31b66477 KC |
460 | ; Nonzero for -fforce-addr: load memory address into a register before |
461 | ; reference to memory. This makes better cse but slower compilation. | |
de32c0cb | 462 | fforce-addr |
c662432e | 463 | Common Report Var(flag_force_addr) Optimization |
f3fdaec4 | 464 | Copy memory address constants into registers before use |
de32c0cb | 465 | |
c662432e | 466 | fforward-propagate Optimization |
a52b023a PB |
467 | Common Report Var(flag_forward_propagate) |
468 | Perform a forward propagation pass on RTL | |
469 | ||
31b66477 KC |
470 | ; Nonzero means don't put addresses of constant functions in registers. |
471 | ; Used for compiling the Unix kernel, where strange substitutions are | |
472 | ; done on the assembly output. | |
de32c0cb | 473 | ffunction-cse |
50431bc4 | 474 | Common Report Var(flag_no_function_cse,0) |
f3fdaec4 | 475 | Allow function addresses to be held in registers |
de32c0cb | 476 | |
6ff3a151 | 477 | ffunction-sections |
50431bc4 | 478 | Common Report Var(flag_function_sections) |
f3fdaec4 | 479 | Place each function into its own section |
6ff3a151 | 480 | |
de32c0cb | 481 | fgcse |
c662432e | 482 | Common Report Var(flag_gcse) Optimization |
f3fdaec4 | 483 | Perform global common subexpression elimination |
de32c0cb NB |
484 | |
485 | fgcse-lm | |
c662432e | 486 | Common Report Var(flag_gcse_lm) Init(1) Optimization |
f3fdaec4 | 487 | Perform enhanced load motion during global common subexpression elimination |
de32c0cb NB |
488 | |
489 | fgcse-sm | |
c662432e | 490 | Common Report Var(flag_gcse_sm) Init(0) Optimization |
f3fdaec4 | 491 | Perform store motion after global common subexpression elimination |
de32c0cb | 492 | |
f5f2e3cd | 493 | fgcse-las |
c662432e | 494 | Common Report Var(flag_gcse_las) Init(0) Optimization |
f9957958 MH |
495 | Perform redundant load after store elimination in global common subexpression |
496 | elimination | |
497 | ||
498 | fgcse-after-reload | |
c662432e | 499 | Common Report Var(flag_gcse_after_reload) Optimization |
f9957958 | 500 | Perform global common subexpression elimination after register allocation |
c85ce869 | 501 | has finished |
f5f2e3cd | 502 | |
6ff3a151 | 503 | fguess-branch-probability |
c662432e | 504 | Common Report Var(flag_guess_branch_prob) Optimization |
f3fdaec4 | 505 | Enable guessing of branch probabilities |
6ff3a151 | 506 | |
31b66477 KC |
507 | ; Nonzero means ignore `#ident' directives. 0 means handle them. |
508 | ; Generate position-independent code for executables if possible | |
509 | ; On SVR4 targets, it also controls whether or not to emit a | |
510 | ; string identifying the compiler. | |
6ff3a151 | 511 | fident |
50431bc4 | 512 | Common Report Var(flag_no_ident,0) |
f3fdaec4 | 513 | Process #ident directives |
6ff3a151 | 514 | |
de32c0cb | 515 | fif-conversion |
c662432e | 516 | Common Report Var(flag_if_conversion) Optimization |
f3fdaec4 | 517 | Perform conversion of conditional jumps to branchless equivalents |
de32c0cb NB |
518 | |
519 | fif-conversion2 | |
c662432e | 520 | Common Report Var(flag_if_conversion2) Optimization |
f3fdaec4 | 521 | Perform conversion of conditional jumps to conditional execution |
de32c0cb | 522 | |
31b66477 KC |
523 | ; -finhibit-size-directive inhibits output of .size for ELF. |
524 | ; This is used only for compiling crtstuff.c, | |
525 | ; and it may be extended to other effects | |
526 | ; needed for crtstuff.c on other systems. | |
6ff3a151 | 527 | finhibit-size-directive |
50431bc4 | 528 | Common Report Var(flag_inhibit_size_directive) |
f3fdaec4 | 529 | Do not generate .size directives |
6ff3a151 | 530 | |
31b66477 KC |
531 | ; Nonzero means that functions declared `inline' will be treated |
532 | ; as `static'. Prevents generation of zillions of copies of unused | |
533 | ; static inline functions; instead, `inlines' are written out | |
534 | ; only when actually used. Used in conjunction with -g. Also | |
535 | ; does the right thing with #pragma interface. | |
de32c0cb | 536 | finline |
50431bc4 | 537 | Common Report Var(flag_no_inline,0) Init(2) |
f3fdaec4 | 538 | Pay attention to the \"inline\" keyword |
de32c0cb NB |
539 | |
540 | finline-functions | |
c662432e | 541 | Common Report Var(flag_inline_functions) Optimization |
f3fdaec4 | 542 | Integrate simple functions into their callers |
de32c0cb | 543 | |
355866de | 544 | finline-functions-called-once |
c662432e | 545 | Common Report Var(flag_inline_functions_called_once) Init(1) Optimization |
355866de | 546 | Integrate functions called once into their callers |
d63db217 | 547 | |
d302c9d6 NB |
548 | finline-limit- |
549 | Common RejectNegative Joined UInteger | |
550 | ||
551 | finline-limit= | |
552 | Common RejectNegative Joined UInteger | |
cf03fd63 | 553 | -finline-limit=<number> Limit the size of inlined functions to <number> |
d302c9d6 | 554 | |
6ff3a151 | 555 | finstrument-functions |
50431bc4 | 556 | Common Report Var(flag_instrument_function_entry_exit) |
f3fdaec4 | 557 | Instrument function entry and exit with profiling calls |
6ff3a151 | 558 | |
d6e14e8f | 559 | fipa-cp |
c662432e | 560 | Common Report Var(flag_ipa_cp) Optimization |
d6e14e8f SB |
561 | Perform Interprocedural constant propagation |
562 | ||
ea900239 | 563 | fipa-pure-const |
c662432e | 564 | Common Report Var(flag_ipa_pure_const) Init(0) Optimization |
ea900239 DB |
565 | Discover pure and const functions |
566 | ||
4cf4d6a3 | 567 | fipa-pta |
c662432e | 568 | Common Report Var(flag_ipa_pta) Init(0) Optimization |
4cf4d6a3 DB |
569 | Perform interprocedural points-to analysis |
570 | ||
ea900239 | 571 | fipa-reference |
c662432e | 572 | Common Report Var(flag_ipa_reference) Init(0) Optimization |
ea900239 DB |
573 | Discover readonly and non addressable static variables |
574 | ||
575 | fipa-type-escape | |
c662432e | 576 | Common Report Var(flag_ipa_type_escape) Init(0) Optimization |
ea900239 DB |
577 | Type based escape and alias analysis |
578 | ||
8b11a64c | 579 | fivopts |
c662432e | 580 | Common Report Var(flag_ivopts) Init(1) Optimization |
8b11a64c ZD |
581 | Optimize induction variables on trees |
582 | ||
82c0180d | 583 | fjump-tables |
c662432e | 584 | Common Var(flag_jump_tables) Init(1) Optimization |
82c0180d JM |
585 | Use jump tables for sufficiently large switch statements |
586 | ||
de32c0cb | 587 | fkeep-inline-functions |
50431bc4 | 588 | Common Report Var(flag_keep_inline_functions) |
f3fdaec4 | 589 | Generate code for functions even if they are fully inlined |
de32c0cb NB |
590 | |
591 | fkeep-static-consts | |
50431bc4 | 592 | Common Report Var(flag_keep_static_consts) Init(1) |
f3fdaec4 | 593 | Emit static const variables even if they are not used |
de32c0cb | 594 | |
6ff3a151 | 595 | fleading-underscore |
50431bc4 | 596 | Common Report Var(flag_leading_underscore) Init(-1) |
f3fdaec4 | 597 | Give external symbols a leading underscore |
6ff3a151 | 598 | |
efa1cdf0 ZD |
599 | floop-optimize |
600 | Common | |
c0220ea4 | 601 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 602 | |
6ff3a151 | 603 | fmath-errno |
50431bc4 | 604 | Common Report Var(flag_errno_math) Init(1) |
f3fdaec4 | 605 | Set errno after built-in math functions |
6ff3a151 NB |
606 | |
607 | fmem-report | |
50431bc4 | 608 | Common Report Var(mem_report) |
f3fdaec4 | 609 | Report on permanent memory allocation |
6ff3a151 | 610 | |
31b66477 KC |
611 | ; This will attempt to merge constant section constants, if 1 only |
612 | ; string constants and constants from constant pool, if 2 also constant | |
613 | ; variables. | |
6ff3a151 | 614 | fmerge-all-constants |
c662432e | 615 | Common Report Var(flag_merge_constants,2) Init(1) Optimization |
f3fdaec4 | 616 | Attempt to merge identical constants and constant variables |
6ff3a151 NB |
617 | |
618 | fmerge-constants | |
c662432e | 619 | Common Report Var(flag_merge_constants,1) VarExists Optimization |
f3fdaec4 | 620 | Attempt to merge identical constants across compilation units |
6ff3a151 | 621 | |
de32c0cb NB |
622 | fmessage-length= |
623 | Common RejectNegative Joined UInteger | |
cf03fd63 | 624 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping |
de32c0cb | 625 | |
e5626198 | 626 | fmodulo-sched |
c662432e | 627 | Common Report Var(flag_modulo_sched) Optimization |
e5626198 AZ |
628 | Perform SMS based modulo scheduling before the first scheduling pass |
629 | ||
5e962776 | 630 | fmove-loop-invariants |
c662432e | 631 | Common Report Var(flag_move_loop_invariants) Init(1) Optimization |
5e962776 ZD |
632 | Move loop invariant computations out of loops |
633 | ||
6de9cd9a | 634 | fmudflap |
50431bc4 | 635 | Common RejectNegative Report Var(flag_mudflap) |
c85ce869 | 636 | Add mudflap bounds-checking instrumentation for single-threaded program |
6de9cd9a DN |
637 | |
638 | fmudflapth | |
110c4563 | 639 | Common RejectNegative Report VarExists Var(flag_mudflap,2) |
c85ce869 | 640 | Add mudflap bounds-checking instrumentation for multi-threaded program |
6de9cd9a DN |
641 | |
642 | fmudflapir | |
50431bc4 | 643 | Common RejectNegative Report Var(flag_mudflap_ignore_reads) |
c85ce869 | 644 | Ignore read operations when inserting mudflap instrumentation |
6de9cd9a | 645 | |
d72372e4 | 646 | freschedule-modulo-scheduled-loops |
c662432e | 647 | Common Report Var(flag_resched_modulo_sched) Optimization |
d72372e4 MH |
648 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling |
649 | ||
6ff3a151 | 650 | fnon-call-exceptions |
c662432e | 651 | Common Report Var(flag_non_call_exceptions) Optimization |
f3fdaec4 | 652 | Support synchronous non-call exceptions |
6ff3a151 | 653 | |
de32c0cb | 654 | fomit-frame-pointer |
c662432e | 655 | Common Report Var(flag_omit_frame_pointer) Optimization |
f3fdaec4 | 656 | When possible do not generate stack frames |
de32c0cb | 657 | |
6ff3a151 | 658 | foptimize-register-move |
c662432e | 659 | Common Report Var(flag_regmove) Optimization |
f3fdaec4 | 660 | Do the full register move optimization pass |
6ff3a151 | 661 | |
de32c0cb | 662 | foptimize-sibling-calls |
c662432e | 663 | Common Report Var(flag_optimize_sibling_calls) Optimization |
f3fdaec4 | 664 | Optimize sibling and tail recursive calls |
de32c0cb | 665 | |
a5573239 JH |
666 | fpre-ipa-mem-report |
667 | Common Report Var(pre_ipa_mem_report) | |
668 | Report on memory allocation before interprocedural optimization | |
669 | ||
670 | fpost-ipa-mem-report | |
671 | Common Report Var(post_ipa_mem_report) | |
672 | Report on memory allocation before interprocedural optimization | |
673 | ||
6ff3a151 | 674 | fpack-struct |
c662432e | 675 | Common Report Var(flag_pack_struct) Optimization |
f3fdaec4 | 676 | Pack structure members together without holes |
6ff3a151 | 677 | |
467cecf3 | 678 | fpack-struct= |
c662432e | 679 | Common RejectNegative Joined UInteger Optimization |
467cecf3 JB |
680 | -fpack-struct=<number> Set initial maximum structure member alignment |
681 | ||
de32c0cb | 682 | fpcc-struct-return |
50431bc4 | 683 | Common Report Var(flag_pcc_struct_return,1) VarExists |
f3fdaec4 | 684 | Return small aggregates in memory, not registers |
de32c0cb NB |
685 | |
686 | fpeel-loops | |
c662432e | 687 | Common Report Var(flag_peel_loops) Optimization |
f3fdaec4 | 688 | Perform loop peeling |
de32c0cb NB |
689 | |
690 | fpeephole | |
c662432e | 691 | Common Report Var(flag_no_peephole,0) Optimization |
f3fdaec4 | 692 | Enable machine specific peephole optimizations |
de32c0cb | 693 | |
6ff3a151 | 694 | fpeephole2 |
c662432e | 695 | Common Report Var(flag_peephole2) Optimization |
f3fdaec4 | 696 | Enable an RTL peephole pass before sched2 |
6ff3a151 | 697 | |
31b66477 KC |
698 | fPIC |
699 | Common Report Var(flag_pic,2) | |
700 | Generate position-independent code if possible (large mode) | |
701 | ||
702 | fPIE | |
703 | Common Report Var(flag_pie,2) | |
704 | Generate position-independent code for executables if possible (large mode) | |
705 | ||
6ff3a151 | 706 | fpic |
50431bc4 | 707 | Common Report Var(flag_pic,1) VarExists |
31b66477 | 708 | Generate position-independent code if possible (small mode) |
6ff3a151 NB |
709 | |
710 | fpie | |
50431bc4 | 711 | Common Report Var(flag_pie,1) VarExists |
31b66477 | 712 | Generate position-independent code for executables if possible (small mode) |
6ff3a151 | 713 | |
de32c0cb | 714 | fprefetch-loop-arrays |
c662432e | 715 | Common Report Var(flag_prefetch_loop_arrays) Optimization |
f3fdaec4 | 716 | Generate prefetch instructions, if available, for arrays in loops |
de32c0cb | 717 | |
6ff3a151 | 718 | fprofile |
50431bc4 | 719 | Common Report Var(profile_flag) |
f3fdaec4 | 720 | Enable basic program profiling code |
6ff3a151 NB |
721 | |
722 | fprofile-arcs | |
50431bc4 | 723 | Common Report Var(profile_arc_flag) |
f3fdaec4 | 724 | Insert arc-based program profiling code |
6ff3a151 | 725 | |
a8a5f53a JH |
726 | fprofile-generate |
727 | Common | |
728 | Enable common options for generating profile info for profile feedback directed optimizations | |
729 | ||
730 | fprofile-use | |
731 | Common | |
732 | Enable common options for performing profile feedback directed optimizations | |
733 | ||
fca9dc00 | 734 | fprofile-values |
50431bc4 | 735 | Common Report Var(flag_profile_values) |
fca9dc00 ZD |
736 | Insert code to profile values of expressions |
737 | ||
de32c0cb NB |
738 | frandom-seed |
739 | Common | |
740 | ||
741 | frandom-seed= | |
742 | Common Joined RejectNegative | |
cf03fd63 | 743 | -frandom-seed=<string> Make compile reproducible using <string> |
de32c0cb | 744 | |
e0d9d0dd NC |
745 | ; This switch causes the command line that was used to create an |
746 | ; object file to be recorded into the object file. The exact format | |
747 | ; of this recording is target and binary file format dependent. | |
748 | ; It is related to the -fverbose-asm switch, but that switch only | |
749 | ; records information in the assembler output file as comments, so | |
750 | ; they never reach the object file. | |
751 | frecord-gcc-switches | |
752 | Common Report Var(flag_record_gcc_switches) | |
753 | Record gcc command line switches in the object file. | |
754 | ||
de32c0cb | 755 | freg-struct-return |
c662432e | 756 | Common Report Var(flag_pcc_struct_return,0) VarExists Optimization |
f3fdaec4 | 757 | Return small aggregates in registers |
de32c0cb | 758 | |
6ff3a151 | 759 | fregmove |
c662432e | 760 | Common Report Var(flag_regmove) Optimization |
f3fdaec4 | 761 | Enables a register move optimization |
6ff3a151 NB |
762 | |
763 | frename-registers | |
c662432e | 764 | Common Report Var(flag_rename_registers) Init(2) Optimization |
f3fdaec4 | 765 | Perform a register renaming optimization pass |
6ff3a151 NB |
766 | |
767 | freorder-blocks | |
c662432e | 768 | Common Report Var(flag_reorder_blocks) Optimization |
f3fdaec4 | 769 | Reorder basic blocks to improve code placement |
6ff3a151 | 770 | |
750054a2 | 771 | freorder-blocks-and-partition |
c662432e | 772 | Common Report Var(flag_reorder_blocks_and_partition) Optimization |
750054a2 CT |
773 | Reorder basic blocks and partition into hot and cold sections |
774 | ||
6ff3a151 | 775 | freorder-functions |
c662432e | 776 | Common Report Var(flag_reorder_functions) Optimization |
f3fdaec4 | 777 | Reorder functions to improve code placement |
6ff3a151 | 778 | |
de32c0cb | 779 | frerun-cse-after-loop |
c662432e | 780 | Common Report Var(flag_rerun_cse_after_loop) Init(2) Optimization |
f3fdaec4 | 781 | Add a common subexpression elimination pass after loop optimizations |
de32c0cb | 782 | |
efa1cdf0 ZD |
783 | frerun-loop-opt |
784 | Common | |
c0220ea4 | 785 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 786 | |
039c3d42 | 787 | frounding-math |
c662432e | 788 | Common Report Var(flag_rounding_math) Optimization |
039c3d42 RS |
789 | Disable optimizations that assume default FP rounding behavior |
790 | ||
6ff3a151 | 791 | fsched-interblock |
c662432e | 792 | Common Report Var(flag_schedule_interblock) Init(1) Optimization |
f3fdaec4 | 793 | Enable scheduling across basic blocks |
6ff3a151 NB |
794 | |
795 | fsched-spec | |
c662432e | 796 | Common Report Var(flag_schedule_speculative) Init(1) Optimization |
f3fdaec4 | 797 | Allow speculative motion of non-loads |
6ff3a151 NB |
798 | |
799 | fsched-spec-load | |
c662432e | 800 | Common Report Var(flag_schedule_speculative_load) Optimization |
f3fdaec4 | 801 | Allow speculative motion of some loads |
6ff3a151 NB |
802 | |
803 | fsched-spec-load-dangerous | |
c662432e | 804 | Common Report Var(flag_schedule_speculative_load_dangerous) Optimization |
f3fdaec4 | 805 | Allow speculative motion of more loads |
6ff3a151 | 806 | |
de32c0cb NB |
807 | fsched-verbose= |
808 | Common RejectNegative Joined | |
cf03fd63 | 809 | -fsched-verbose=<number> Set the verbosity level of the scheduler |
de32c0cb | 810 | |
6ff3a151 | 811 | fsched2-use-superblocks |
c662432e | 812 | Common Report Var(flag_sched2_use_superblocks) Optimization |
f3fdaec4 | 813 | If scheduling post reload, do superblock scheduling |
6ff3a151 NB |
814 | |
815 | fsched2-use-traces | |
c662432e | 816 | Common Report Var(flag_sched2_use_traces) Optimization |
f3fdaec4 | 817 | If scheduling post reload, do trace scheduling |
6ff3a151 | 818 | |
de32c0cb | 819 | fschedule-insns |
c662432e | 820 | Common Report Var(flag_schedule_insns) Optimization |
f3fdaec4 | 821 | Reschedule instructions before register allocation |
de32c0cb NB |
822 | |
823 | fschedule-insns2 | |
c662432e | 824 | Common Report Var(flag_schedule_insns_after_reload) Optimization |
f3fdaec4 | 825 | Reschedule instructions after register allocation |
de32c0cb | 826 | |
31b66477 KC |
827 | ; sched_stalled_insns means that insns can be moved prematurely from the queue |
828 | ; of stalled insns into the ready list. | |
569fa502 | 829 | fsched-stalled-insns |
c662432e | 830 | Common Report Var(flag_sched_stalled_insns) Optimization |
569fa502 DN |
831 | Allow premature scheduling of queued insns |
832 | ||
833 | fsched-stalled-insns= | |
c22cacf3 | 834 | Common RejectNegative Joined UInteger |
4e994432 | 835 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled |
569fa502 | 836 | |
31b66477 KC |
837 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will |
838 | ; be examined for a dependency on a stalled insn that is candidate for | |
839 | ; premature removal from the queue of stalled insns into the ready list (has | |
840 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
569fa502 | 841 | fsched-stalled-insns-dep |
c662432e | 842 | Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization |
569fa502 DN |
843 | Set dependence distance checking in premature scheduling of queued insns |
844 | ||
845 | fsched-stalled-insns-dep= | |
846 | Common RejectNegative Joined UInteger | |
4e994432 | 847 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns |
569fa502 | 848 | |
aacd3885 | 849 | fsection-anchors |
c662432e | 850 | Common Report Var(flag_section_anchors) Optimization |
aacd3885 RS |
851 | Access data in the same section from shared anchor points |
852 | ||
38109dab | 853 | frtl-abstract-sequences |
c662432e | 854 | Common Report Var(flag_rtl_seqabstr) Optimization |
38109dab GL |
855 | Perform sequence abstraction optimization on RTL |
856 | ||
8cd37d0b RL |
857 | fsee |
858 | Common Report Var(flag_see) Init(0) | |
859 | Eliminate redundant sign extensions using LCM. | |
860 | ||
8abb6b22 PB |
861 | fshow-column |
862 | Common C ObjC C++ ObjC++ Report Var(flag_show_column) Init(1) | |
c85ce869 | 863 | Show column numbers in diagnostics, when available. Default on |
8abb6b22 | 864 | |
6ff3a151 | 865 | fsignaling-nans |
c662432e | 866 | Common Report Var(flag_signaling_nans) Optimization |
f3fdaec4 | 867 | Disable optimizations observable by IEEE signaling NaNs |
6ff3a151 | 868 | |
db02da79 | 869 | fsigned-zeros |
21af5cdf | 870 | Common Report Var(flag_signed_zeros) Init(1) Optimization |
db02da79 RS |
871 | Disable floating point optimizations that ignore the IEEE signedness of zero |
872 | ||
6ff3a151 | 873 | fsingle-precision-constant |
c662432e | 874 | Common Report Var(flag_single_precision_constant) Optimization |
f3fdaec4 | 875 | Convert floating point constants to single precision constants |
6ff3a151 | 876 | |
113d659a | 877 | fsplit-ivs-in-unroller |
c662432e | 878 | Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization |
c85ce869 | 879 | Split lifetimes of induction variables when loops are unrolled |
113d659a | 880 | |
e53a16e7 | 881 | fsplit-wide-types |
21af5cdf | 882 | Common Report Var(flag_split_wide_types) Optimization |
e53a16e7 ILT |
883 | Split wide types into independent registers |
884 | ||
f37a4f14 | 885 | fvariable-expansion-in-unroller |
c662432e | 886 | Common Report Var(flag_variable_expansion_in_unroller) Optimization |
c85ce869 | 887 | Apply variable expansion when loops are unrolled |
f37a4f14 | 888 | |
31b66477 KC |
889 | ; Emit code to probe the stack, to help detect stack overflow; also |
890 | ; may cause large objects to be allocated dynamically. | |
6ff3a151 | 891 | fstack-check |
50431bc4 | 892 | Common Report Var(flag_stack_check) |
f3fdaec4 | 893 | Insert stack checking code into the program |
6ff3a151 | 894 | |
de32c0cb NB |
895 | fstack-limit |
896 | Common | |
897 | ||
058de654 NB |
898 | fstack-limit-register= |
899 | Common RejectNegative Joined | |
cf03fd63 | 900 | -fstack-limit-register=<register> Trap if the stack goes past <register> |
058de654 NB |
901 | |
902 | fstack-limit-symbol= | |
903 | Common RejectNegative Joined | |
cf03fd63 | 904 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name> |
058de654 | 905 | |
7d69de61 RH |
906 | fstack-protector |
907 | Common Report Var(flag_stack_protect, 1) | |
908 | Use propolice as a stack protection method | |
909 | ||
910 | fstack-protector-all | |
911 | Common Report RejectNegative Var(flag_stack_protect, 2) VarExists | |
912 | Use a stack protection method for every function | |
913 | ||
de32c0cb | 914 | fstrength-reduce |
efa1cdf0 | 915 | Common |
c0220ea4 | 916 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 917 | |
31b66477 KC |
918 | ; Nonzero if we should do (language-dependent) alias analysis. |
919 | ; Typically, this analysis will assume that expressions of certain | |
920 | ; types do not alias expressions of certain other types. Only used | |
921 | ; if alias analysis (in general) is enabled. | |
6ff3a151 | 922 | fstrict-aliasing |
c662432e | 923 | Common Report Var(flag_strict_aliasing) Optimization |
f3fdaec4 | 924 | Assume strict aliasing rules apply |
6ff3a151 | 925 | |
eeef0e45 ILT |
926 | fstrict-overflow |
927 | Common Report Var(flag_strict_overflow) | |
928 | Treat signed overflow as undefined | |
929 | ||
de32c0cb | 930 | fsyntax-only |
50431bc4 | 931 | Common Report Var(flag_syntax_only) |
f3fdaec4 | 932 | Check for syntax errors, then stop |
de32c0cb | 933 | |
6ff3a151 | 934 | ftest-coverage |
50431bc4 | 935 | Common Report Var(flag_test_coverage) |
f3fdaec4 | 936 | Create data files needed by \"gcov\" |
6ff3a151 | 937 | |
de32c0cb | 938 | fthread-jumps |
c662432e | 939 | Common Report Var(flag_thread_jumps) Optimization |
f3fdaec4 | 940 | Perform jump threading optimizations |
de32c0cb | 941 | |
6ff3a151 | 942 | ftime-report |
50431bc4 | 943 | Common Report Var(time_report) |
f3fdaec4 | 944 | Report the time taken by each compiler pass |
6ff3a151 | 945 | |
058de654 NB |
946 | ftls-model= |
947 | Common Joined RejectNegative | |
cf03fd63 | 948 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model |
058de654 | 949 | |
474eccc6 | 950 | ftoplevel-reorder |
c662432e | 951 | Common Report Var(flag_toplevel_reorder) Init(1) Optimization |
474eccc6 ILT |
952 | Reorder top level functions, variables, and asms |
953 | ||
de32c0cb | 954 | ftracer |
50431bc4 | 955 | Common Report Var(flag_tracer) |
f3fdaec4 | 956 | Perform superblock formation via tail duplication |
de32c0cb | 957 | |
31b66477 KC |
958 | ; Zero means that floating-point math operations cannot generate a |
959 | ; (user-visible) trap. This is the case, for example, in nonstop | |
960 | ; IEEE 754 arithmetic. | |
6ff3a151 | 961 | ftrapping-math |
c662432e | 962 | Common Report Var(flag_trapping_math) Init(1) Optimization |
f3fdaec4 | 963 | Assume floating-point operations can trap |
6ff3a151 NB |
964 | |
965 | ftrapv | |
c662432e | 966 | Common Report Var(flag_trapv) Optimization |
f3fdaec4 | 967 | Trap for signed overflow in addition, subtraction and multiplication |
6ff3a151 | 968 | |
6de9cd9a | 969 | ftree-ccp |
c662432e | 970 | Common Report Var(flag_tree_ccp) Optimization |
6de9cd9a DN |
971 | Enable SSA-CCP optimization on trees |
972 | ||
0bca51f0 | 973 | ftree-store-ccp |
c662432e | 974 | Common Report Var(flag_tree_store_ccp) Optimization |
0bca51f0 DN |
975 | Enable SSA-CCP optimization for stores and loads |
976 | ||
6de9cd9a | 977 | ftree-ch |
c662432e | 978 | Common Report Var(flag_tree_ch) Optimization |
6de9cd9a DN |
979 | Enable loop header copying on trees |
980 | ||
6de9cd9a | 981 | ftree-copyrename |
c662432e | 982 | Common Report Var(flag_tree_copyrename) Optimization |
c85ce869 | 983 | Replace SSA temporaries with better names in copies |
6de9cd9a | 984 | |
0bca51f0 | 985 | ftree-copy-prop |
c662432e | 986 | Common Report Var(flag_tree_copy_prop) Optimization |
0bca51f0 DN |
987 | Enable copy propagation on trees |
988 | ||
989 | ftree-store-copy-prop | |
c662432e | 990 | Common Report Var(flag_tree_store_copy_prop) Optimization |
0bca51f0 DN |
991 | Enable copy propagation for stores and loads |
992 | ||
6de9cd9a | 993 | ftree-dce |
c662432e | 994 | Common Report Var(flag_tree_dce) Optimization |
6de9cd9a DN |
995 | Enable SSA dead code elimination optimization on trees |
996 | ||
997 | ftree-dominator-opts | |
c662432e | 998 | Common Report Var(flag_tree_dom) Optimization |
6de9cd9a DN |
999 | Enable dominator optimizations |
1000 | ||
1001 | ftree-dse | |
c662432e | 1002 | Common Report Var(flag_tree_dse) Optimization |
6de9cd9a DN |
1003 | Enable dead store elimination |
1004 | ||
ff2ad0f7 | 1005 | ftree-fre |
c662432e | 1006 | Common Report Var(flag_tree_fre) Optimization |
ff2ad0f7 DN |
1007 | Enable Full Redundancy Elimination (FRE) on trees |
1008 | ||
1b08d87d | 1009 | ftree-loop-im |
c662432e | 1010 | Common Report Var(flag_tree_loop_im) Init(1) Optimization |
a7e5372d ZD |
1011 | Enable loop invariant motion on trees |
1012 | ||
599eabdb | 1013 | ftree-loop-linear |
c662432e | 1014 | Common Report Var(flag_tree_loop_linear) Optimization |
599eabdb DB |
1015 | Enable linear loop transforms on trees |
1016 | ||
1b08d87d | 1017 | ftree-loop-ivcanon |
c662432e | 1018 | Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization |
1b08d87d DB |
1019 | Create canonical induction variables in loops |
1020 | ||
c66b6c66 | 1021 | ftree-loop-optimize |
c662432e | 1022 | Common Report Var(flag_tree_loop_optimize) Init(1) Optimization |
c66b6c66 ZD |
1023 | Enable loop optimizations on tree level |
1024 | ||
6de9cd9a | 1025 | ftree-pre |
c662432e | 1026 | Common Report Var(flag_tree_pre) Optimization |
6de9cd9a DN |
1027 | Enable SSA-PRE optimization on trees |
1028 | ||
c75ab022 | 1029 | ftree-salias |
c662432e | 1030 | Common Report Var(flag_tree_salias) Optimization |
c75ab022 DB |
1031 | Perform structural alias analysis |
1032 | ||
fa555252 | 1033 | ftree-sink |
c662432e | 1034 | Common Report Var(flag_tree_sink) Optimization |
fa555252 DB |
1035 | Enable SSA code sinking on trees |
1036 | ||
6de9cd9a | 1037 | ftree-sra |
c662432e | 1038 | Common Report Var(flag_tree_sra) Optimization |
6de9cd9a DN |
1039 | Perform scalar replacement of aggregates |
1040 | ||
1041 | ftree-ter | |
c662432e | 1042 | Common Report Var(flag_tree_ter) Optimization |
6de9cd9a DN |
1043 | Replace temporary expressions in the SSA->normal pass |
1044 | ||
c662432e NC |
1045 | ftree-lrs |
1046 | Common Report Var(flag_tree_live_range_split) Optimization | |
1047 | Perform live range splitting during the SSA->normal pass | |
1048 | ||
0bca51f0 | 1049 | ftree-vrp |
c662432e | 1050 | Common Report Var(flag_tree_vrp) Init(0) Optimization |
0bca51f0 DN |
1051 | Perform Value Range Propagation on trees |
1052 | ||
de32c0cb | 1053 | funit-at-a-time |
c662432e | 1054 | Common Report Var(flag_unit_at_a_time) Optimization |
f3fdaec4 | 1055 | Compile whole compilation unit at a time |
de32c0cb NB |
1056 | |
1057 | funroll-loops | |
c662432e | 1058 | Common Report Var(flag_unroll_loops) Optimization |
f3fdaec4 | 1059 | Perform loop unrolling when iteration count is known |
de32c0cb NB |
1060 | |
1061 | funroll-all-loops | |
c662432e | 1062 | Common Report Var(flag_unroll_all_loops) Optimization |
f3fdaec4 | 1063 | Perform loop unrolling for all loops |
de32c0cb | 1064 | |
f9cc1a70 PB |
1065 | ; Nonzero means that loop optimizer may assume that the induction variables |
1066 | ; that control loops do not overflow and that the loops with nontrivial | |
1067 | ; exit condition are not infinite | |
1068 | funsafe-loop-optimizations | |
c662432e | 1069 | Common Report Var(flag_unsafe_loop_optimizations) Optimization |
f9cc1a70 PB |
1070 | Allow loop optimizations to assume that the loops behave in normal way |
1071 | ||
31b66477 KC |
1072 | ; Nonzero means that unsafe floating-point math optimizations are allowed |
1073 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
1074 | ; are allowed to assume that their arguments and results are "normal" | |
1075 | ; (e.g., nonnegative for SQRT). | |
6ff3a151 | 1076 | funsafe-math-optimizations |
c662432e | 1077 | Common Report Var(flag_unsafe_math_optimizations) Optimization |
f3fdaec4 | 1078 | Allow math optimizations that may violate IEEE or ISO standards |
6ff3a151 | 1079 | |
de32c0cb | 1080 | funswitch-loops |
c662432e | 1081 | Common Report Var(flag_unswitch_loops) Optimization |
f3fdaec4 | 1082 | Perform loop unswitching |
de32c0cb | 1083 | |
6ff3a151 | 1084 | funwind-tables |
c662432e | 1085 | Common Report Var(flag_unwind_tables) Optimization |
f3fdaec4 | 1086 | Just generate unwind tables for exception handling |
6ff3a151 | 1087 | |
014a1138 | 1088 | fvar-tracking |
c662432e | 1089 | Common Report Var(flag_var_tracking) VarExists Optimization |
014a1138 JZ |
1090 | Perform variable tracking |
1091 | ||
79fe1b3b | 1092 | ftree-vectorize |
c662432e | 1093 | Common Report Var(flag_tree_vectorize) Optimization |
79fe1b3b DN |
1094 | Enable loop vectorization on trees |
1095 | ||
c12cc930 | 1096 | ftree-vect-loop-version |
c662432e | 1097 | Common Report Var(flag_tree_vect_loop_version) Init(1) Optimization |
c12cc930 KB |
1098 | Enable loop versioning when doing loop vectorization on trees |
1099 | ||
c866976a LB |
1100 | ftree-vectorizer-verbose= |
1101 | Common RejectNegative Joined | |
4e994432 | 1102 | -ftree-vectorizer-verbose=<number> Set the verbosity level of the vectorizer |
c866976a | 1103 | |
fbf798fc | 1104 | ftree-scev-cprop |
21af5cdf | 1105 | Common Report Var(flag_tree_scev_cprop) Init(1) Optimization |
fbf798fc DN |
1106 | Enable copy propagation of scalar-evolution information. |
1107 | ||
31b66477 KC |
1108 | ; -fverbose-asm causes extra commentary information to be produced in |
1109 | ; the generated assembly code (to make it more readable). This option | |
1110 | ; is generally only of use to those who actually need to read the | |
1111 | ; generated assembly code (perhaps while debugging the compiler itself). | |
1112 | ; -fno-verbose-asm, the default, causes the extra information | |
1113 | ; to not be added and is useful when comparing two assembler files. | |
6ff3a151 | 1114 | fverbose-asm |
50431bc4 | 1115 | Common Report Var(flag_verbose_asm) |
f3fdaec4 | 1116 | Add extra commentary to assembler output |
6ff3a151 | 1117 | |
d7afec4b ND |
1118 | fvisibility= |
1119 | Common Joined RejectNegative | |
1120 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility | |
1121 | ||
1122 | ||
fca9dc00 | 1123 | fvpt |
c662432e | 1124 | Common Report Var(flag_value_profile_transformations) Optimization |
fca9dc00 ZD |
1125 | Use expression value profiles in optimizations |
1126 | ||
62551c66 | 1127 | fweb |
c662432e | 1128 | Common Report Var(flag_web) Init(2) Optimization |
62551c66 JH |
1129 | Construct webs and split unrelated uses of single variable |
1130 | ||
ce91e74c | 1131 | fwhole-program |
c662432e | 1132 | Common Report Var(flag_whole_program) Init(0) Optimization |
ce91e74c JH |
1133 | Perform whole program optimizations |
1134 | ||
6ff3a151 | 1135 | fwrapv |
c662432e | 1136 | Common Report Var(flag_wrapv) Optimization |
f3fdaec4 | 1137 | Assume signed arithmetic overflow wraps around |
6ff3a151 | 1138 | |
6ff3a151 | 1139 | fzero-initialized-in-bss |
50431bc4 | 1140 | Common Report Var(flag_zero_initialized_in_bss) Init(1) |
f3fdaec4 | 1141 | Put zero initialized data in the bss section |
6ff3a151 | 1142 | |
e01cc6dc NB |
1143 | g |
1144 | Common JoinedOrMissing | |
df38ffef NB |
1145 | Generate debug information in default format |
1146 | ||
1147 | gcoff | |
14c7833c | 1148 | Common JoinedOrMissing Negative(gdwarf-2) |
df38ffef NB |
1149 | Generate debug information in COFF format |
1150 | ||
df38ffef | 1151 | gdwarf-2 |
14c7833c | 1152 | Common JoinedOrMissing Negative(gstabs) |
df38ffef NB |
1153 | Generate debug information in DWARF v2 format |
1154 | ||
1155 | ggdb | |
1156 | Common JoinedOrMissing | |
1157 | Generate debug information in default extended format | |
1158 | ||
1159 | gstabs | |
14c7833c | 1160 | Common JoinedOrMissing Negative(gstabs+) |
df38ffef NB |
1161 | Generate debug information in STABS format |
1162 | ||
1163 | gstabs+ | |
14c7833c | 1164 | Common JoinedOrMissing Negative(gvms) |
df38ffef NB |
1165 | Generate debug information in extended STABS format |
1166 | ||
1167 | gvms | |
14c7833c | 1168 | Common JoinedOrMissing Negative(gxcoff) |
df38ffef NB |
1169 | Generate debug information in VMS format |
1170 | ||
1171 | gxcoff | |
14c7833c | 1172 | Common JoinedOrMissing Negative(gxcoff+) |
df38ffef NB |
1173 | Generate debug information in XCOFF format |
1174 | ||
1175 | gxcoff+ | |
14c7833c | 1176 | Common JoinedOrMissing Negative(gcoff) |
df38ffef | 1177 | Generate debug information in extended XCOFF format |
e01cc6dc | 1178 | |
d185d268 NB |
1179 | o |
1180 | Common Joined Separate | |
cf03fd63 | 1181 | -o <file> Place output into <file> |
d185d268 NB |
1182 | |
1183 | p | |
50431bc4 | 1184 | Common Var(profile_flag) |
cf03fd63 | 1185 | Enable function profiling |
d185d268 NB |
1186 | |
1187 | pedantic | |
50431bc4 | 1188 | Common Var(pedantic) |
cf03fd63 | 1189 | Issue warnings needed for strict compliance to the standard |
d185d268 NB |
1190 | |
1191 | pedantic-errors | |
1192 | Common | |
cf03fd63 | 1193 | Like -pedantic but issue them as errors |
d185d268 | 1194 | |
d7b42618 | 1195 | quiet |
50431bc4 | 1196 | Common Var(quiet_flag) |
cf03fd63 | 1197 | Do not display functions compiled or elapsed time |
d7b42618 | 1198 | |
d185d268 | 1199 | version |
50431bc4 | 1200 | Common Var(version_flag) |
cf03fd63 | 1201 | Display the compiler's version |
d185d268 NB |
1202 | |
1203 | w | |
50431bc4 | 1204 | Common Var(inhibit_warnings) |
cf03fd63 | 1205 | Suppress warnings |
d185d268 | 1206 | |
d7b42618 | 1207 | ; This comment is to ensure we retain the blank line above. |