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3272db82 | 1 | ; Options for the language- and target-independent parts of the compiler. |
2e9da478 | 2 | |
76f02516 | 3 | ; Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc. |
3272db82 | 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. | |
11 | ; | |
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. | |
16 | ; | |
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 | |
67ce556b | 19 | ; Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
20 | ; 02110-1301, USA. | |
3272db82 | 21 | |
5fd4bf3b | 22 | ; See the GCC internals manual 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 | |
da3b1bab | 30 | -param |
31 | Common Separate | |
29fed0db | 32 | --param <param>=<value> Set parameter <param> to value. See below for a complete list of parameters |
da3b1bab | 33 | |
e690b385 | 34 | -target-help |
35 | Common | |
36 | ||
37 | -version | |
38 | Common | |
39 | ||
40 | G | |
837277ab | 41 | Common Joined Separate UInteger |
53b8e5c1 | 42 | -G<number> Put global and static data smaller than <number> bytes into a special section (on some targets) |
e690b385 | 43 | |
da3b1bab | 44 | O |
45 | Common JoinedOrMissing | |
53b8e5c1 | 46 | -O<number> Set optimization level to <number> |
da3b1bab | 47 | |
48 | Os | |
49 | Common | |
53b8e5c1 | 50 | Optimize for space rather than speed |
da3b1bab | 51 | |
52 | W | |
53 | Common RejectNegative | |
bb0814ce | 54 | This switch is deprecated; use -Wextra instead |
da3b1bab | 55 | |
6f2f567f | 56 | Waggregate-return |
2e9da478 | 57 | Common Var(warn_aggregate_return) |
bb0814ce | 58 | Warn about returning structures, unions or arrays |
6f2f567f | 59 | |
90fea167 | 60 | Walways-true |
61 | Common Var(warn_always_true) | |
62 | Warn about comparisons that always evaluate to true | |
63 | ||
9b2d6d13 | 64 | Wattributes |
65 | Common Var(warn_attributes) Init(1) | |
66 | Warn about inappropriate attribute usage | |
67 | ||
6f2f567f | 68 | Wcast-align |
2e9da478 | 69 | Common Var(warn_cast_align) |
bb0814ce | 70 | Warn about pointer casts which increase alignment |
6f2f567f | 71 | |
72 | Wdeprecated-declarations | |
2e9da478 | 73 | Common Var(warn_deprecated_decl) Init(1) |
bb0814ce | 74 | Warn about uses of __attribute__((deprecated)) declarations |
6f2f567f | 75 | |
76 | Wdisabled-optimization | |
2e9da478 | 77 | Common Var(warn_disabled_optimization) |
bb0814ce | 78 | Warn when an optimization pass is disabled |
6f2f567f | 79 | |
80 | Werror | |
2e9da478 | 81 | Common Var(warnings_are_errors) |
bb0814ce | 82 | Treat all warnings as errors |
6f2f567f | 83 | |
76f02516 | 84 | Werror= |
85 | Common Joined | |
86 | Treat specified warning as error | |
87 | ||
da3b1bab | 88 | Wextra |
89 | Common | |
53b8e5c1 | 90 | Print extra (possibly unwanted) warnings |
da3b1bab | 91 | |
295acf4f | 92 | Wfatal-errors |
2e9da478 | 93 | Common Var(flag_fatal_errors) |
295acf4f | 94 | Exit on the first error occurred |
95 | ||
6f2f567f | 96 | Winline |
2e9da478 | 97 | Common Var(warn_inline) |
bb0814ce | 98 | Warn when an inlined function cannot be inlined |
6f2f567f | 99 | |
100 | Wlarger-than- | |
101 | Common RejectNegative Joined UInteger | |
53b8e5c1 | 102 | -Wlarger-than-<number> Warn if an object is larger than <number> bytes |
6f2f567f | 103 | |
7e3cc681 | 104 | Wunsafe-loop-optimizations |
105 | Common Var(warn_unsafe_loop_optimizations) | |
106 | Warn if the loop cannot be optimized due to nontrivial assumptions. | |
107 | ||
6f2f567f | 108 | Wmissing-noreturn |
2e9da478 | 109 | Common Var(warn_missing_noreturn) |
bb0814ce | 110 | Warn about functions which might be candidates for __attribute__((noreturn)) |
6f2f567f | 111 | |
112 | Wpacked | |
2e9da478 | 113 | Common Var(warn_packed) |
bb0814ce | 114 | Warn when the packed attribute has no effect on struct layout |
6f2f567f | 115 | |
116 | Wpadded | |
2e9da478 | 117 | Common Var(warn_padded) |
bb0814ce | 118 | Warn when padding is required to align structure members |
6f2f567f | 119 | |
120 | Wshadow | |
2e9da478 | 121 | Common Var(warn_shadow) |
bb0814ce | 122 | Warn when one local variable shadows another |
6f2f567f | 123 | |
f1a0edff | 124 | Wstack-protector |
125 | Common Var(warn_stack_protect) | |
126 | Warn when not issuing stack smashing protection for some reason | |
127 | ||
6f2f567f | 128 | Wstrict-aliasing |
129 | Common | |
bb0814ce | 130 | Warn about code which might break strict aliasing rules |
6f2f567f | 131 | |
c1628b55 | 132 | Wstrict-aliasing= |
133 | Common Joined UInteger | |
134 | Warn about code which might break strict aliasing rules | |
135 | ||
19f0596c | 136 | Wstring-literal-comparison |
137 | Common Var(warn_string_literal_comparison) | |
138 | Warn about comparisons to constant string literals | |
139 | ||
6f2f567f | 140 | Wswitch |
2e9da478 | 141 | Common Var(warn_switch) |
bb0814ce | 142 | Warn about enumerated switches, with no default, missing a case |
6f2f567f | 143 | |
144 | Wswitch-default | |
2e9da478 | 145 | Common Var(warn_switch_default) |
bb0814ce | 146 | Warn about enumerated switches missing a \"default:\" statement |
6f2f567f | 147 | |
148 | Wswitch-enum | |
2e9da478 | 149 | Common Var(warn_switch_enum) |
bb0814ce | 150 | Warn about all enumerated switches missing a specific case |
6f2f567f | 151 | |
152 | Wsystem-headers | |
2e9da478 | 153 | Common Var(warn_system_headers) |
72528c71 | 154 | Do not suppress warnings from system headers |
6f2f567f | 155 | |
156 | Wuninitialized | |
2e9da478 | 157 | Common Var(warn_uninitialized) |
bb0814ce | 158 | Warn about uninitialized automatic variables |
6f2f567f | 159 | |
160 | Wunreachable-code | |
2e9da478 | 161 | Common Var(warn_notreached) |
bb0814ce | 162 | Warn about code that will never be executed |
6f2f567f | 163 | |
da3b1bab | 164 | Wunused |
165 | Common | |
53b8e5c1 | 166 | Enable all -Wunused- warnings |
da3b1bab | 167 | |
6f2f567f | 168 | Wunused-function |
2e9da478 | 169 | Common Var(warn_unused_function) |
bb0814ce | 170 | Warn when a function is unused |
6f2f567f | 171 | |
172 | Wunused-label | |
2e9da478 | 173 | Common Var(warn_unused_label) |
bb0814ce | 174 | Warn when a label is unused |
6f2f567f | 175 | |
176 | Wunused-parameter | |
2e9da478 | 177 | Common Var(warn_unused_parameter) |
bb0814ce | 178 | Warn when a function parameter is unused |
6f2f567f | 179 | |
180 | Wunused-value | |
2e9da478 | 181 | Common Var(warn_unused_value) |
bb0814ce | 182 | Warn when an expression value is unused |
6f2f567f | 183 | |
184 | Wunused-variable | |
2e9da478 | 185 | Common Var(warn_unused_variable) |
bb0814ce | 186 | Warn when a variable is unused |
6f2f567f | 187 | |
bf2a1b05 | 188 | Wvolatile-register-var |
189 | Common Var(warn_register_var) | |
190 | Warn when a register variable is declared volatile | |
191 | ||
e690b385 | 192 | aux-info |
193 | Common Separate | |
53b8e5c1 | 194 | -aux-info <file> Emit declaration information into <file> |
e690b385 | 195 | |
196 | aux-info= | |
197 | Common Joined | |
198 | ||
199 | auxbase | |
200 | Common Separate | |
201 | ||
202 | auxbase-strip | |
203 | Common Separate | |
204 | ||
205 | d | |
206 | Common Joined | |
53b8e5c1 | 207 | -d<letters> Enable dumps from specific passes of the compiler |
e690b385 | 208 | |
209 | dumpbase | |
210 | Common Separate | |
53b8e5c1 | 211 | -dumpbase <file> Set the file basename to be used for dumps |
e690b385 | 212 | |
82a16202 | 213 | ; The version of the C++ ABI in use. The following values are allowed: |
214 | ; | |
215 | ; 0: The version of the ABI believed most conformant with the C++ ABI | |
216 | ; specification. This ABI may change as bugs are discovered and fixed. | |
217 | ; Therefore, 0 will not necessarily indicate the same ABI in different | |
218 | ; versions of G++. | |
219 | ; | |
220 | ; 1: The version of the ABI first used in G++ 3.2. | |
221 | ; | |
222 | ; Additional positive integers will be assigned as new versions of | |
223 | ; the ABI become the default version of the ABI. | |
e100aadc | 224 | fabi-version= |
2e9da478 | 225 | Common Joined UInteger Var(flag_abi_version) Init(2) |
e100aadc | 226 | |
ecdb6d1a | 227 | falign-functions |
2e9da478 | 228 | Common Report Var(align_functions,0) |
72528c71 | 229 | Align the start of functions |
ecdb6d1a | 230 | |
941a4893 | 231 | falign-functions= |
232 | Common RejectNegative Joined UInteger | |
233 | ||
ecdb6d1a | 234 | falign-jumps |
2e9da478 | 235 | Common Report Var(align_jumps,0) |
72528c71 | 236 | Align labels which are only reached by jumping |
ecdb6d1a | 237 | |
941a4893 | 238 | falign-jumps= |
239 | Common RejectNegative Joined UInteger | |
240 | ||
ecdb6d1a | 241 | falign-labels |
2e9da478 | 242 | Common Report Var(align_labels,0) |
72528c71 | 243 | Align all labels |
ecdb6d1a | 244 | |
941a4893 | 245 | falign-labels= |
246 | Common RejectNegative Joined UInteger | |
247 | ||
ecdb6d1a | 248 | falign-loops |
2e9da478 | 249 | Common Report Var(align_loops) |
72528c71 | 250 | Align the start of loops |
ecdb6d1a | 251 | |
941a4893 | 252 | falign-loops= |
253 | Common RejectNegative Joined UInteger | |
254 | ||
82a16202 | 255 | ; This flag is only tested if alias checking is enabled. |
256 | ; 0 if pointer arguments may alias each other. True in C. | |
257 | ; 1 if pointer arguments may not alias each other but may alias | |
258 | ; global variables. | |
259 | ; 2 if pointer arguments may not alias each other and may not | |
260 | ; alias global variables. True in Fortran. | |
ecdb6d1a | 261 | fargument-alias |
2e9da478 | 262 | Common Report Var(flag_argument_noalias,0) |
72528c71 | 263 | Specify that arguments may alias each other and globals |
ecdb6d1a | 264 | |
265 | fargument-noalias | |
2e9da478 | 266 | Common Report Var(flag_argument_noalias,1) VarExists |
72528c71 | 267 | Assume arguments may alias globals but not each other |
ecdb6d1a | 268 | |
269 | fargument-noalias-global | |
2e9da478 | 270 | Common Report Var(flag_argument_noalias,2) VarExists |
72528c71 | 271 | Assume arguments alias neither each other nor globals |
ecdb6d1a | 272 | |
273 | fasynchronous-unwind-tables | |
2e9da478 | 274 | Common Report Var(flag_asynchronous_unwind_tables) |
72528c71 | 275 | Generate unwind tables that are exact at each instruction boundary |
ecdb6d1a | 276 | |
82a16202 | 277 | ; -fcheck-bounds causes gcc to generate array bounds checks. |
278 | ; For C, C++ and ObjC: defaults off. | |
279 | ; For Java: defaults to on. | |
280 | ; For Fortran: defaults to off. | |
ecdb6d1a | 281 | fbounds-check |
2e9da478 | 282 | Common Report Var(flag_bounds_check) |
72528c71 | 283 | Generate code to check bounds before indexing arrays |
ecdb6d1a | 284 | |
285 | fbranch-count-reg | |
2e9da478 | 286 | Common Report Var(flag_branch_on_count_reg) Init(1) |
72528c71 | 287 | Replace add, compare, branch with branch on count register |
ecdb6d1a | 288 | |
289 | fbranch-probabilities | |
2e9da478 | 290 | Common Report Var(flag_branch_probabilities) |
72528c71 | 291 | Use profiling information for branch probabilities |
ecdb6d1a | 292 | |
1e06725a | 293 | fbranch-target-load-optimize |
2e9da478 | 294 | Common Report Var(flag_branch_target_load_optimize) |
72528c71 | 295 | Perform branch target load optimization before prologue / epilogue threading |
1e06725a | 296 | |
297 | fbranch-target-load-optimize2 | |
2e9da478 | 298 | Common Report Var(flag_branch_target_load_optimize2) |
72528c71 | 299 | Perform branch target load optimization after prologue / epilogue threading |
1e06725a | 300 | |
08d163a9 | 301 | fbtr-bb-exclusive |
2e9da478 | 302 | Common Report Var(flag_btr_bb_exclusive) |
08d163a9 | 303 | Restrict target load migration not to re-use registers in any basic block |
304 | ||
941a4893 | 305 | fcall-saved- |
306 | Common Joined RejectNegative | |
53b8e5c1 | 307 | -fcall-saved-<register> Mark <register> as being preserved across functions |
941a4893 | 308 | |
309 | fcall-used- | |
310 | Common Joined RejectNegative | |
53b8e5c1 | 311 | -fcall-used-<register> Mark <register> as being corrupted by function calls |
941a4893 | 312 | |
82a16202 | 313 | ; Nonzero for -fcaller-saves: allocate values in regs that need to |
314 | ; be saved across function calls, if that produces overall better code. | |
315 | ; Optional now, so people can test it. | |
1e06725a | 316 | fcaller-saves |
2e9da478 | 317 | Common Report Var(flag_caller_saves) |
72528c71 | 318 | Save registers around function calls |
1e06725a | 319 | |
ecdb6d1a | 320 | fcommon |
2e9da478 | 321 | Common Report Var(flag_no_common,0) |
72528c71 | 322 | Do not put uninitialized globals in the common section |
ecdb6d1a | 323 | |
324 | fcprop-registers | |
2e9da478 | 325 | Common Report Var(flag_cprop_registers) |
72528c71 | 326 | Perform a register copy-propagation optimization pass |
ecdb6d1a | 327 | |
1e06725a | 328 | fcrossjumping |
2e9da478 | 329 | Common Report Var(flag_crossjumping) |
72528c71 | 330 | Perform cross-jumping optimization |
1e06725a | 331 | |
332 | fcse-follow-jumps | |
2e9da478 | 333 | Common Report Var(flag_cse_follow_jumps) |
72528c71 | 334 | When running CSE, follow jumps to their targets |
1e06725a | 335 | |
336 | fcse-skip-blocks | |
2e9da478 | 337 | Common Report Var(flag_cse_skip_blocks) |
72528c71 | 338 | When running CSE, follow conditional jumps |
1e06725a | 339 | |
45b9d334 | 340 | fcx-limited-range |
341 | Common Report Var(flag_cx_limited_range) | |
342 | Omit range reduction step when performing complex division | |
343 | ||
ecdb6d1a | 344 | fdata-sections |
2e9da478 | 345 | Common Report Var(flag_data_sections) |
72528c71 | 346 | Place data items into their own section |
ecdb6d1a | 347 | |
82a16202 | 348 | ; Nonzero for -fdefer-pop: don't pop args after each function call |
349 | ; instead save them up to pop many calls' args with one insns. | |
1e06725a | 350 | fdefer-pop |
2e9da478 | 351 | Common Report Var(flag_defer_pop) |
72528c71 | 352 | Defer popping functions args from stack until later |
1e06725a | 353 | |
354 | fdelayed-branch | |
2e9da478 | 355 | Common Report Var(flag_delayed_branch) |
72528c71 | 356 | Attempt to fill delay slots of branch instructions |
1e06725a | 357 | |
358 | fdelete-null-pointer-checks | |
2e9da478 | 359 | Common Report Var(flag_delete_null_pointer_checks) |
72528c71 | 360 | Delete useless null pointer checks |
1e06725a | 361 | |
362 | fdiagnostics-show-location= | |
363 | Common Joined RejectNegative | |
53b8e5c1 | 364 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics |
1e06725a | 365 | |
efb9d9ee | 366 | fdiagnostics-show-option |
b0932b2f | 367 | Common |
3284a242 | 368 | Amend appropriate diagnostic messages with the command line option that controls them |
efb9d9ee | 369 | |
4ee9c684 | 370 | fdump- |
371 | Common Joined RejectNegative | |
372 | -fdump-<type> Dump various compiler internals to a file | |
373 | ||
ecdb6d1a | 374 | fdump-unnumbered |
2e9da478 | 375 | Common Report Var(flag_dump_unnumbered) VarExists |
72528c71 | 376 | Suppress output of instruction numbers and line number notes in debugging dumps |
ecdb6d1a | 377 | |
f1aa280c | 378 | fearly-inlining |
379 | Common Report Var(flag_early_inlining) Init(1) | |
380 | Perform early inlining | |
381 | ||
1e06725a | 382 | feliminate-dwarf2-dups |
2e9da478 | 383 | Common Report Var(flag_eliminate_dwarf2_dups) |
72528c71 | 384 | Perform DWARF2 duplicate elimination |
1e06725a | 385 | |
262444a6 | 386 | feliminate-unused-debug-symbols |
2e9da478 | 387 | Common Report Var(flag_debug_only_used_symbols) |
72528c71 | 388 | Perform unused type elimination in debug info |
262444a6 | 389 | |
1e06725a | 390 | feliminate-unused-debug-types |
2e9da478 | 391 | Common Report Var(flag_eliminate_unused_debug_types) Init(1) |
72528c71 | 392 | Perform unused type elimination in debug info |
1e06725a | 393 | |
ecdb6d1a | 394 | fexceptions |
2e9da478 | 395 | Common Report Var(flag_exceptions) |
72528c71 | 396 | Enable exception handling |
ecdb6d1a | 397 | |
1e06725a | 398 | fexpensive-optimizations |
2e9da478 | 399 | Common Report Var(flag_expensive_optimizations) |
72528c71 | 400 | Perform a number of minor, expensive optimizations |
1e06725a | 401 | |
941a4893 | 402 | ffast-math |
403 | Common | |
404 | ||
ecdb6d1a | 405 | ffinite-math-only |
2e9da478 | 406 | Common Report Var(flag_finite_math_only) |
72528c71 | 407 | Assume no NaNs or infinities are generated |
ecdb6d1a | 408 | |
941a4893 | 409 | ffixed- |
410 | Common Joined RejectNegative | |
53b8e5c1 | 411 | -ffixed-<register> Mark <register> as being unavailable to the compiler |
941a4893 | 412 | |
1e06725a | 413 | ffloat-store |
2e9da478 | 414 | Common Report Var(flag_float_store) |
82a16202 | 415 | Don't allocate floats and doubles in extended-precision registers |
1e06725a | 416 | |
82a16202 | 417 | ; Nonzero for -fforce-addr: load memory address into a register before |
418 | ; reference to memory. This makes better cse but slower compilation. | |
1e06725a | 419 | fforce-addr |
2e9da478 | 420 | Common Report Var(flag_force_addr) |
72528c71 | 421 | Copy memory address constants into registers before use |
1e06725a | 422 | |
82a16202 | 423 | ; Nonzero for -fforce-mem: load memory value into a register |
424 | ; before arithmetic on it. This makes better cse but slower compilation. | |
1e06725a | 425 | fforce-mem |
2e9da478 | 426 | Common Report Var(flag_force_mem) |
72528c71 | 427 | Copy memory operands into registers before use |
1e06725a | 428 | |
82a16202 | 429 | ; Nonzero means don't put addresses of constant functions in registers. |
430 | ; Used for compiling the Unix kernel, where strange substitutions are | |
431 | ; done on the assembly output. | |
1e06725a | 432 | ffunction-cse |
2e9da478 | 433 | Common Report Var(flag_no_function_cse,0) |
72528c71 | 434 | Allow function addresses to be held in registers |
1e06725a | 435 | |
ecdb6d1a | 436 | ffunction-sections |
2e9da478 | 437 | Common Report Var(flag_function_sections) |
72528c71 | 438 | Place each function into its own section |
ecdb6d1a | 439 | |
1e06725a | 440 | fgcse |
2e9da478 | 441 | Common Report Var(flag_gcse) |
72528c71 | 442 | Perform global common subexpression elimination |
1e06725a | 443 | |
444 | fgcse-lm | |
2e9da478 | 445 | Common Report Var(flag_gcse_lm) Init(1) |
72528c71 | 446 | Perform enhanced load motion during global common subexpression elimination |
1e06725a | 447 | |
448 | fgcse-sm | |
62434574 | 449 | Common Report Var(flag_gcse_sm) Init(0) |
72528c71 | 450 | Perform store motion after global common subexpression elimination |
1e06725a | 451 | |
5c47e414 | 452 | fgcse-las |
62434574 | 453 | Common Report Var(flag_gcse_las) Init(0) |
839f8415 | 454 | Perform redundant load after store elimination in global common subexpression |
455 | elimination | |
456 | ||
457 | fgcse-after-reload | |
868e8f12 | 458 | Common Report Var(flag_gcse_after_reload) |
839f8415 | 459 | Perform global common subexpression elimination after register allocation |
3284a242 | 460 | has finished |
5c47e414 | 461 | |
ecdb6d1a | 462 | fguess-branch-probability |
2e9da478 | 463 | Common Report Var(flag_guess_branch_prob) |
72528c71 | 464 | Enable guessing of branch probabilities |
ecdb6d1a | 465 | |
82a16202 | 466 | ; Nonzero means ignore `#ident' directives. 0 means handle them. |
467 | ; Generate position-independent code for executables if possible | |
468 | ; On SVR4 targets, it also controls whether or not to emit a | |
469 | ; string identifying the compiler. | |
ecdb6d1a | 470 | fident |
2e9da478 | 471 | Common Report Var(flag_no_ident,0) |
72528c71 | 472 | Process #ident directives |
ecdb6d1a | 473 | |
1e06725a | 474 | fif-conversion |
2e9da478 | 475 | Common Report Var(flag_if_conversion) |
72528c71 | 476 | Perform conversion of conditional jumps to branchless equivalents |
1e06725a | 477 | |
478 | fif-conversion2 | |
2e9da478 | 479 | Common Report Var(flag_if_conversion2) |
72528c71 | 480 | Perform conversion of conditional jumps to conditional execution |
1e06725a | 481 | |
82a16202 | 482 | ; -finhibit-size-directive inhibits output of .size for ELF. |
483 | ; This is used only for compiling crtstuff.c, | |
484 | ; and it may be extended to other effects | |
485 | ; needed for crtstuff.c on other systems. | |
ecdb6d1a | 486 | finhibit-size-directive |
2e9da478 | 487 | Common Report Var(flag_inhibit_size_directive) |
72528c71 | 488 | Do not generate .size directives |
ecdb6d1a | 489 | |
82a16202 | 490 | ; Nonzero means that functions declared `inline' will be treated |
491 | ; as `static'. Prevents generation of zillions of copies of unused | |
492 | ; static inline functions; instead, `inlines' are written out | |
493 | ; only when actually used. Used in conjunction with -g. Also | |
494 | ; does the right thing with #pragma interface. | |
1e06725a | 495 | finline |
2e9da478 | 496 | Common Report Var(flag_no_inline,0) Init(2) |
72528c71 | 497 | Pay attention to the \"inline\" keyword |
1e06725a | 498 | |
499 | finline-functions | |
2e9da478 | 500 | Common Report Var(flag_inline_functions) |
72528c71 | 501 | Integrate simple functions into their callers |
1e06725a | 502 | |
f1aa280c | 503 | finline-functions-called-once |
504 | Common Report Var(flag_inline_functions_called_once) Init(1) | |
505 | Integrate functions called once into their callers | |
9e0baf4d | 506 | |
39470ac3 | 507 | finline-limit- |
508 | Common RejectNegative Joined UInteger | |
509 | ||
510 | finline-limit= | |
511 | Common RejectNegative Joined UInteger | |
53b8e5c1 | 512 | -finline-limit=<number> Limit the size of inlined functions to <number> |
39470ac3 | 513 | |
ecdb6d1a | 514 | finstrument-functions |
2e9da478 | 515 | Common Report Var(flag_instrument_function_entry_exit) |
72528c71 | 516 | Instrument function entry and exit with profiling calls |
ecdb6d1a | 517 | |
a17a73c7 | 518 | fipa-cp |
519 | Common Report Var(flag_ipa_cp) | |
520 | Perform Interprocedural constant propagation | |
521 | ||
f7d118a9 | 522 | fipa-pure-const |
523 | Common Report Var(flag_ipa_pure_const) Init(0) | |
524 | Discover pure and const functions | |
525 | ||
bdf4f142 | 526 | fipa-pta |
527 | Common Report Var(flag_ipa_pta) Init(0) | |
528 | Perform interprocedural points-to analysis | |
529 | ||
f7d118a9 | 530 | fipa-reference |
531 | Common Report Var(flag_ipa_reference) Init(0) | |
532 | Discover readonly and non addressable static variables | |
533 | ||
534 | fipa-type-escape | |
535 | Common Report Var(flag_ipa_type_escape) Init(0) | |
536 | Type based escape and alias analysis | |
537 | ||
dec41e98 | 538 | fivopts |
539 | Common Report Var(flag_ivopts) Init(1) | |
540 | Optimize induction variables on trees | |
541 | ||
51d8e657 | 542 | fjump-tables |
543 | Common Var(flag_jump_tables) Init(1) | |
544 | Use jump tables for sufficiently large switch statements | |
545 | ||
1e06725a | 546 | fkeep-inline-functions |
2e9da478 | 547 | Common Report Var(flag_keep_inline_functions) |
72528c71 | 548 | Generate code for functions even if they are fully inlined |
1e06725a | 549 | |
550 | fkeep-static-consts | |
2e9da478 | 551 | Common Report Var(flag_keep_static_consts) Init(1) |
72528c71 | 552 | Emit static const variables even if they are not used |
1e06725a | 553 | |
ecdb6d1a | 554 | fleading-underscore |
2e9da478 | 555 | Common Report Var(flag_leading_underscore) Init(-1) |
72528c71 | 556 | Give external symbols a leading underscore |
ecdb6d1a | 557 | |
4f87b914 | 558 | floop-optimize |
559 | Common | |
560 | Does nothing. Preserved for backward compatability. | |
561 | ||
ecdb6d1a | 562 | fmath-errno |
2e9da478 | 563 | Common Report Var(flag_errno_math) Init(1) |
72528c71 | 564 | Set errno after built-in math functions |
ecdb6d1a | 565 | |
566 | fmem-report | |
2e9da478 | 567 | Common Report Var(mem_report) |
72528c71 | 568 | Report on permanent memory allocation |
ecdb6d1a | 569 | |
82a16202 | 570 | ; This will attempt to merge constant section constants, if 1 only |
571 | ; string constants and constants from constant pool, if 2 also constant | |
572 | ; variables. | |
ecdb6d1a | 573 | fmerge-all-constants |
2e9da478 | 574 | Common Report Var(flag_merge_constants,2) Init(1) |
72528c71 | 575 | Attempt to merge identical constants and constant variables |
ecdb6d1a | 576 | |
577 | fmerge-constants | |
2e9da478 | 578 | Common Report Var(flag_merge_constants,1) VarExists |
72528c71 | 579 | Attempt to merge identical constants across compilation units |
ecdb6d1a | 580 | |
1e06725a | 581 | fmessage-length= |
582 | Common RejectNegative Joined UInteger | |
53b8e5c1 | 583 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping |
1e06725a | 584 | |
406a73e7 | 585 | fmodulo-sched |
2e9da478 | 586 | Common Report Var(flag_modulo_sched) |
406a73e7 | 587 | Perform SMS based modulo scheduling before the first scheduling pass |
588 | ||
3a0ecac2 | 589 | fmove-loop-invariants |
a82484af | 590 | Common Report Var(flag_move_loop_invariants) Init(1) |
3a0ecac2 | 591 | Move loop invariant computations out of loops |
592 | ||
4ee9c684 | 593 | fmudflap |
2e9da478 | 594 | Common RejectNegative Report Var(flag_mudflap) |
3284a242 | 595 | Add mudflap bounds-checking instrumentation for single-threaded program |
4ee9c684 | 596 | |
597 | fmudflapth | |
2e9da478 | 598 | Common RejectNegative Report Var(flag_mudflap_threads) |
3284a242 | 599 | Add mudflap bounds-checking instrumentation for multi-threaded program |
4ee9c684 | 600 | |
601 | fmudflapir | |
2e9da478 | 602 | Common RejectNegative Report Var(flag_mudflap_ignore_reads) |
3284a242 | 603 | Ignore read operations when inserting mudflap instrumentation |
4ee9c684 | 604 | |
f045d41d | 605 | freschedule-modulo-scheduled-loops |
606 | Common Report Var(flag_resched_modulo_sched) | |
607 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling | |
608 | ||
ecdb6d1a | 609 | fnon-call-exceptions |
2e9da478 | 610 | Common Report Var(flag_non_call_exceptions) |
72528c71 | 611 | Support synchronous non-call exceptions |
ecdb6d1a | 612 | |
1e06725a | 613 | fomit-frame-pointer |
2e9da478 | 614 | Common Report Var(flag_omit_frame_pointer) |
72528c71 | 615 | When possible do not generate stack frames |
1e06725a | 616 | |
ecdb6d1a | 617 | foptimize-register-move |
2e9da478 | 618 | Common Report Var(flag_regmove) |
72528c71 | 619 | Do the full register move optimization pass |
ecdb6d1a | 620 | |
1e06725a | 621 | foptimize-sibling-calls |
2e9da478 | 622 | Common Report Var(flag_optimize_sibling_calls) |
72528c71 | 623 | Optimize sibling and tail recursive calls |
1e06725a | 624 | |
ecdb6d1a | 625 | fpack-struct |
2e9da478 | 626 | Common Report Var(flag_pack_struct) |
72528c71 | 627 | Pack structure members together without holes |
ecdb6d1a | 628 | |
6b5553e5 | 629 | fpack-struct= |
630 | Common RejectNegative Joined UInteger | |
631 | -fpack-struct=<number> Set initial maximum structure member alignment | |
632 | ||
1e06725a | 633 | fpcc-struct-return |
2e9da478 | 634 | Common Report Var(flag_pcc_struct_return,1) VarExists |
72528c71 | 635 | Return small aggregates in memory, not registers |
1e06725a | 636 | |
637 | fpeel-loops | |
2e9da478 | 638 | Common Report Var(flag_peel_loops) |
72528c71 | 639 | Perform loop peeling |
1e06725a | 640 | |
641 | fpeephole | |
2e9da478 | 642 | Common Report Var(flag_no_peephole,0) |
72528c71 | 643 | Enable machine specific peephole optimizations |
1e06725a | 644 | |
ecdb6d1a | 645 | fpeephole2 |
2e9da478 | 646 | Common Report Var(flag_peephole2) |
72528c71 | 647 | Enable an RTL peephole pass before sched2 |
ecdb6d1a | 648 | |
82a16202 | 649 | fPIC |
650 | Common Report Var(flag_pic,2) | |
651 | Generate position-independent code if possible (large mode) | |
652 | ||
653 | fPIE | |
654 | Common Report Var(flag_pie,2) | |
655 | Generate position-independent code for executables if possible (large mode) | |
656 | ||
ecdb6d1a | 657 | fpic |
2e9da478 | 658 | Common Report Var(flag_pic,1) VarExists |
82a16202 | 659 | Generate position-independent code if possible (small mode) |
ecdb6d1a | 660 | |
661 | fpie | |
2e9da478 | 662 | Common Report Var(flag_pie,1) VarExists |
82a16202 | 663 | Generate position-independent code for executables if possible (small mode) |
ecdb6d1a | 664 | |
1e06725a | 665 | fprefetch-loop-arrays |
4f87b914 | 666 | Common Report Var(flag_prefetch_loop_arrays) |
72528c71 | 667 | Generate prefetch instructions, if available, for arrays in loops |
1e06725a | 668 | |
ecdb6d1a | 669 | fprofile |
2e9da478 | 670 | Common Report Var(profile_flag) |
72528c71 | 671 | Enable basic program profiling code |
ecdb6d1a | 672 | |
673 | fprofile-arcs | |
2e9da478 | 674 | Common Report Var(profile_arc_flag) |
72528c71 | 675 | Insert arc-based program profiling code |
ecdb6d1a | 676 | |
7dea76ba | 677 | fprofile-generate |
678 | Common | |
679 | Enable common options for generating profile info for profile feedback directed optimizations | |
680 | ||
681 | fprofile-use | |
682 | Common | |
683 | Enable common options for performing profile feedback directed optimizations | |
684 | ||
1c6a7b8c | 685 | fprofile-values |
2e9da478 | 686 | Common Report Var(flag_profile_values) |
1c6a7b8c | 687 | Insert code to profile values of expressions |
688 | ||
1e06725a | 689 | frandom-seed |
690 | Common | |
691 | ||
692 | frandom-seed= | |
693 | Common Joined RejectNegative | |
53b8e5c1 | 694 | -frandom-seed=<string> Make compile reproducible using <string> |
1e06725a | 695 | |
1e06725a | 696 | freg-struct-return |
2e9da478 | 697 | Common Report Var(flag_pcc_struct_return,0) VarExists |
72528c71 | 698 | Return small aggregates in registers |
1e06725a | 699 | |
ecdb6d1a | 700 | fregmove |
2e9da478 | 701 | Common Report Var(flag_regmove) |
72528c71 | 702 | Enables a register move optimization |
ecdb6d1a | 703 | |
704 | frename-registers | |
472cd78a | 705 | Common Report Var(flag_rename_registers) Init(2) |
72528c71 | 706 | Perform a register renaming optimization pass |
ecdb6d1a | 707 | |
708 | freorder-blocks | |
2e9da478 | 709 | Common Report Var(flag_reorder_blocks) |
72528c71 | 710 | Reorder basic blocks to improve code placement |
ecdb6d1a | 711 | |
4f18499c | 712 | freorder-blocks-and-partition |
2e9da478 | 713 | Common Report Var(flag_reorder_blocks_and_partition) |
4f18499c | 714 | Reorder basic blocks and partition into hot and cold sections |
715 | ||
ecdb6d1a | 716 | freorder-functions |
2e9da478 | 717 | Common Report Var(flag_reorder_functions) |
72528c71 | 718 | Reorder functions to improve code placement |
ecdb6d1a | 719 | |
1e06725a | 720 | frerun-cse-after-loop |
868e8f12 | 721 | Common Report Var(flag_rerun_cse_after_loop) Init(2) |
72528c71 | 722 | Add a common subexpression elimination pass after loop optimizations |
1e06725a | 723 | |
4f87b914 | 724 | frerun-loop-opt |
725 | Common | |
726 | Does nothing. Preserved for backward compatability. | |
727 | ||
5466f589 | 728 | frounding-math |
2e9da478 | 729 | Common Report Var(flag_rounding_math) |
5466f589 | 730 | Disable optimizations that assume default FP rounding behavior |
731 | ||
ecdb6d1a | 732 | fsched-interblock |
2e9da478 | 733 | Common Report Var(flag_schedule_interblock) Init(1) |
72528c71 | 734 | Enable scheduling across basic blocks |
ecdb6d1a | 735 | |
736 | fsched-spec | |
2e9da478 | 737 | Common Report Var(flag_schedule_speculative) Init(1) |
72528c71 | 738 | Allow speculative motion of non-loads |
ecdb6d1a | 739 | |
740 | fsched-spec-load | |
2e9da478 | 741 | Common Report Var(flag_schedule_speculative_load) |
72528c71 | 742 | Allow speculative motion of some loads |
ecdb6d1a | 743 | |
744 | fsched-spec-load-dangerous | |
2e9da478 | 745 | Common Report Var(flag_schedule_speculative_load_dangerous) |
72528c71 | 746 | Allow speculative motion of more loads |
ecdb6d1a | 747 | |
1e06725a | 748 | fsched-verbose= |
749 | Common RejectNegative Joined | |
53b8e5c1 | 750 | -fsched-verbose=<number> Set the verbosity level of the scheduler |
1e06725a | 751 | |
ecdb6d1a | 752 | fsched2-use-superblocks |
2e9da478 | 753 | Common Report Var(flag_sched2_use_superblocks) |
72528c71 | 754 | If scheduling post reload, do superblock scheduling |
ecdb6d1a | 755 | |
756 | fsched2-use-traces | |
2e9da478 | 757 | Common Report Var(flag_sched2_use_traces) |
72528c71 | 758 | If scheduling post reload, do trace scheduling |
ecdb6d1a | 759 | |
1e06725a | 760 | fschedule-insns |
2e9da478 | 761 | Common Report Var(flag_schedule_insns) |
72528c71 | 762 | Reschedule instructions before register allocation |
1e06725a | 763 | |
764 | fschedule-insns2 | |
2e9da478 | 765 | Common Report Var(flag_schedule_insns_after_reload) |
72528c71 | 766 | Reschedule instructions after register allocation |
1e06725a | 767 | |
82a16202 | 768 | ; sched_stalled_insns means that insns can be moved prematurely from the queue |
769 | ; of stalled insns into the ready list. | |
52c4b43f | 770 | fsched-stalled-insns |
2e9da478 | 771 | Common Report Var(flag_sched_stalled_insns) |
52c4b43f | 772 | Allow premature scheduling of queued insns |
773 | ||
774 | fsched-stalled-insns= | |
775 | Common RejectNegative Joined UInteger | |
98b93ebb | 776 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled |
52c4b43f | 777 | |
82a16202 | 778 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will |
779 | ; be examined for a dependency on a stalled insn that is candidate for | |
780 | ; premature removal from the queue of stalled insns into the ready list (has | |
781 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
52c4b43f | 782 | fsched-stalled-insns-dep |
2e9da478 | 783 | Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) |
52c4b43f | 784 | Set dependence distance checking in premature scheduling of queued insns |
785 | ||
786 | fsched-stalled-insns-dep= | |
787 | Common RejectNegative Joined UInteger | |
98b93ebb | 788 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns |
52c4b43f | 789 | |
f2d0e9f1 | 790 | fsection-anchors |
791 | Common Report Var(flag_section_anchors) | |
792 | Access data in the same section from shared anchor points | |
793 | ||
89140b26 | 794 | frtl-abstract-sequences |
795 | Common Report Var(flag_rtl_seqabstr) | |
796 | Perform sequence abstraction optimization on RTL | |
797 | ||
5fd4bf3b | 798 | fshow-column |
799 | Common C ObjC C++ ObjC++ Report Var(flag_show_column) Init(1) | |
3284a242 | 800 | Show column numbers in diagnostics, when available. Default on |
5fd4bf3b | 801 | |
ecdb6d1a | 802 | fsignaling-nans |
2e9da478 | 803 | Common Report Var(flag_signaling_nans) |
72528c71 | 804 | Disable optimizations observable by IEEE signaling NaNs |
ecdb6d1a | 805 | |
806 | fsingle-precision-constant | |
2e9da478 | 807 | Common Report Var(flag_single_precision_constant) |
72528c71 | 808 | Convert floating point constants to single precision constants |
ecdb6d1a | 809 | |
a9989fb4 | 810 | fsplit-ivs-in-unroller |
811 | Common Report Var(flag_split_ivs_in_unroller) Init(1) | |
3284a242 | 812 | Split lifetimes of induction variables when loops are unrolled |
a9989fb4 | 813 | |
375bb675 | 814 | fvariable-expansion-in-unroller |
815 | Common Report Var(flag_variable_expansion_in_unroller) | |
3284a242 | 816 | Apply variable expansion when loops are unrolled |
375bb675 | 817 | |
82a16202 | 818 | ; Emit code to probe the stack, to help detect stack overflow; also |
819 | ; may cause large objects to be allocated dynamically. | |
ecdb6d1a | 820 | fstack-check |
2e9da478 | 821 | Common Report Var(flag_stack_check) |
72528c71 | 822 | Insert stack checking code into the program |
ecdb6d1a | 823 | |
1e06725a | 824 | fstack-limit |
825 | Common | |
826 | ||
941a4893 | 827 | fstack-limit-register= |
828 | Common RejectNegative Joined | |
53b8e5c1 | 829 | -fstack-limit-register=<register> Trap if the stack goes past <register> |
941a4893 | 830 | |
831 | fstack-limit-symbol= | |
832 | Common RejectNegative Joined | |
53b8e5c1 | 833 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name> |
941a4893 | 834 | |
f1a0edff | 835 | fstack-protector |
836 | Common Report Var(flag_stack_protect, 1) | |
837 | Use propolice as a stack protection method | |
838 | ||
839 | fstack-protector-all | |
840 | Common Report RejectNegative Var(flag_stack_protect, 2) VarExists | |
841 | Use a stack protection method for every function | |
842 | ||
1e06725a | 843 | fstrength-reduce |
4f87b914 | 844 | Common |
845 | Does nothing. Preserved for backward compatability. | |
1e06725a | 846 | |
82a16202 | 847 | ; Nonzero if we should do (language-dependent) alias analysis. |
848 | ; Typically, this analysis will assume that expressions of certain | |
849 | ; types do not alias expressions of certain other types. Only used | |
850 | ; if alias analysis (in general) is enabled. | |
ecdb6d1a | 851 | fstrict-aliasing |
2e9da478 | 852 | Common Report Var(flag_strict_aliasing) |
72528c71 | 853 | Assume strict aliasing rules apply |
ecdb6d1a | 854 | |
1e06725a | 855 | fsyntax-only |
2e9da478 | 856 | Common Report Var(flag_syntax_only) |
72528c71 | 857 | Check for syntax errors, then stop |
1e06725a | 858 | |
ecdb6d1a | 859 | ftest-coverage |
2e9da478 | 860 | Common Report Var(flag_test_coverage) |
72528c71 | 861 | Create data files needed by \"gcov\" |
ecdb6d1a | 862 | |
1e06725a | 863 | fthread-jumps |
2e9da478 | 864 | Common Report Var(flag_thread_jumps) |
72528c71 | 865 | Perform jump threading optimizations |
1e06725a | 866 | |
ecdb6d1a | 867 | ftime-report |
2e9da478 | 868 | Common Report Var(time_report) |
72528c71 | 869 | Report the time taken by each compiler pass |
ecdb6d1a | 870 | |
941a4893 | 871 | ftls-model= |
872 | Common Joined RejectNegative | |
53b8e5c1 | 873 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model |
941a4893 | 874 | |
56af936e | 875 | ftoplevel-reorder |
876 | Common Report Var(flag_toplevel_reorder) Init(1) | |
877 | Reorder top level functions, variables, and asms | |
878 | ||
1e06725a | 879 | ftracer |
2e9da478 | 880 | Common Report Var(flag_tracer) |
72528c71 | 881 | Perform superblock formation via tail duplication |
1e06725a | 882 | |
82a16202 | 883 | ; Zero means that floating-point math operations cannot generate a |
884 | ; (user-visible) trap. This is the case, for example, in nonstop | |
885 | ; IEEE 754 arithmetic. | |
ecdb6d1a | 886 | ftrapping-math |
a619b050 | 887 | Common Report Var(flag_trapping_math) Init(1) |
72528c71 | 888 | Assume floating-point operations can trap |
ecdb6d1a | 889 | |
890 | ftrapv | |
2e9da478 | 891 | Common Report Var(flag_trapv) |
72528c71 | 892 | Trap for signed overflow in addition, subtraction and multiplication |
ecdb6d1a | 893 | |
4ee9c684 | 894 | ftree-ccp |
2e9da478 | 895 | Common Report Var(flag_tree_ccp) |
4ee9c684 | 896 | Enable SSA-CCP optimization on trees |
897 | ||
88dbf20f | 898 | ftree-store-ccp |
899 | Common Report Var(flag_tree_store_ccp) | |
900 | Enable SSA-CCP optimization for stores and loads | |
901 | ||
4ee9c684 | 902 | ftree-ch |
2e9da478 | 903 | Common Report Var(flag_tree_ch) |
4ee9c684 | 904 | Enable loop header copying on trees |
905 | ||
906 | ftree-combine-temps | |
2e9da478 | 907 | Common Report Var(flag_tree_combine_temps) |
4ee9c684 | 908 | Coalesce memory temporaries in the SSA->normal pass |
909 | ||
910 | ftree-copyrename | |
2e9da478 | 911 | Common Report Var(flag_tree_copyrename) |
3284a242 | 912 | Replace SSA temporaries with better names in copies |
4ee9c684 | 913 | |
88dbf20f | 914 | ftree-copy-prop |
915 | Common Report Var(flag_tree_copy_prop) | |
916 | Enable copy propagation on trees | |
917 | ||
918 | ftree-store-copy-prop | |
919 | Common Report Var(flag_tree_store_copy_prop) | |
920 | Enable copy propagation for stores and loads | |
921 | ||
4ee9c684 | 922 | ftree-dce |
2e9da478 | 923 | Common Report Var(flag_tree_dce) |
4ee9c684 | 924 | Enable SSA dead code elimination optimization on trees |
925 | ||
926 | ftree-dominator-opts | |
2e9da478 | 927 | Common Report Var(flag_tree_dom) |
4ee9c684 | 928 | Enable dominator optimizations |
929 | ||
930 | ftree-dse | |
2e9da478 | 931 | Common Report Var(flag_tree_dse) |
4ee9c684 | 932 | Enable dead store elimination |
933 | ||
591c2a30 | 934 | ftree-fre |
935 | Common Report Var(flag_tree_fre) | |
936 | Enable Full Redundancy Elimination (FRE) on trees | |
937 | ||
41b5cc78 | 938 | ftree-loop-im |
939 | Common Report Var(flag_tree_loop_im) Init(1) | |
7d23383d | 940 | Enable loop invariant motion on trees |
941 | ||
60cfcb79 | 942 | ftree-loop-linear |
943 | Common Report Var(flag_tree_loop_linear) | |
944 | Enable linear loop transforms on trees | |
945 | ||
41b5cc78 | 946 | ftree-loop-ivcanon |
08162157 | 947 | Common Report Var(flag_tree_loop_ivcanon) Init(1) |
41b5cc78 | 948 | Create canonical induction variables in loops |
949 | ||
dcb9eccb | 950 | ftree-loop-optimize |
951 | Common Report Var(flag_tree_loop_optimize) Init(1) | |
952 | Enable loop optimizations on tree level | |
953 | ||
4ee9c684 | 954 | ftree-pre |
2e9da478 | 955 | Common Report Var(flag_tree_pre) |
4ee9c684 | 956 | Enable SSA-PRE optimization on trees |
957 | ||
2be14d8b | 958 | ftree-salias |
959 | Common Report Var(flag_tree_salias) | |
960 | Perform structural alias analysis | |
961 | ||
5e733b02 | 962 | ftree-sink |
963 | Common Report Var(flag_tree_sink) | |
964 | Enable SSA code sinking on trees | |
965 | ||
4ee9c684 | 966 | ftree-sra |
2e9da478 | 967 | Common Report Var(flag_tree_sra) |
4ee9c684 | 968 | Perform scalar replacement of aggregates |
969 | ||
970 | ftree-ter | |
2e9da478 | 971 | Common Report Var(flag_tree_ter) |
4ee9c684 | 972 | Replace temporary expressions in the SSA->normal pass |
973 | ||
974 | ftree-lrs | |
2e9da478 | 975 | Common Report Var(flag_tree_live_range_split) |
3284a242 | 976 | Perform live range splitting during the SSA->normal pass |
4ee9c684 | 977 | |
88dbf20f | 978 | ftree-vrp |
979 | Common Report Var(flag_tree_vrp) Init(0) | |
980 | Perform Value Range Propagation on trees | |
981 | ||
1e06725a | 982 | funit-at-a-time |
2e9da478 | 983 | Common Report Var(flag_unit_at_a_time) |
72528c71 | 984 | Compile whole compilation unit at a time |
1e06725a | 985 | |
986 | funroll-loops | |
2e9da478 | 987 | Common Report Var(flag_unroll_loops) |
72528c71 | 988 | Perform loop unrolling when iteration count is known |
1e06725a | 989 | |
990 | funroll-all-loops | |
2e9da478 | 991 | Common Report Var(flag_unroll_all_loops) |
72528c71 | 992 | Perform loop unrolling for all loops |
1e06725a | 993 | |
7e3cc681 | 994 | ; Nonzero means that loop optimizer may assume that the induction variables |
995 | ; that control loops do not overflow and that the loops with nontrivial | |
996 | ; exit condition are not infinite | |
997 | funsafe-loop-optimizations | |
998 | Common Report Var(flag_unsafe_loop_optimizations) | |
999 | Allow loop optimizations to assume that the loops behave in normal way | |
1000 | ||
82a16202 | 1001 | ; Nonzero means that unsafe floating-point math optimizations are allowed |
1002 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
1003 | ; are allowed to assume that their arguments and results are "normal" | |
1004 | ; (e.g., nonnegative for SQRT). | |
ecdb6d1a | 1005 | funsafe-math-optimizations |
2e9da478 | 1006 | Common Report Var(flag_unsafe_math_optimizations) |
72528c71 | 1007 | Allow math optimizations that may violate IEEE or ISO standards |
ecdb6d1a | 1008 | |
1e06725a | 1009 | funswitch-loops |
2e9da478 | 1010 | Common Report Var(flag_unswitch_loops) |
72528c71 | 1011 | Perform loop unswitching |
1e06725a | 1012 | |
ecdb6d1a | 1013 | funwind-tables |
2e9da478 | 1014 | Common Report Var(flag_unwind_tables) |
72528c71 | 1015 | Just generate unwind tables for exception handling |
ecdb6d1a | 1016 | |
5923a5e7 | 1017 | fvar-tracking |
2e9da478 | 1018 | Common Report Var(flag_var_tracking) VarExists |
5923a5e7 | 1019 | Perform variable tracking |
1020 | ||
c91e8223 | 1021 | ftree-vectorize |
1022 | Common Report Var(flag_tree_vectorize) | |
1023 | Enable loop vectorization on trees | |
1024 | ||
25e3c2e8 | 1025 | ftree-vect-loop-version |
1026 | Common Report Var(flag_tree_vect_loop_version) Init(1) | |
1027 | Enable loop versioning when doing loop vectorization on trees | |
1028 | ||
459e8543 | 1029 | ftree-vectorizer-verbose= |
1030 | Common RejectNegative Joined | |
98b93ebb | 1031 | -ftree-vectorizer-verbose=<number> Set the verbosity level of the vectorizer |
459e8543 | 1032 | |
82a16202 | 1033 | ; -fverbose-asm causes extra commentary information to be produced in |
1034 | ; the generated assembly code (to make it more readable). This option | |
1035 | ; is generally only of use to those who actually need to read the | |
1036 | ; generated assembly code (perhaps while debugging the compiler itself). | |
1037 | ; -fno-verbose-asm, the default, causes the extra information | |
1038 | ; to not be added and is useful when comparing two assembler files. | |
ecdb6d1a | 1039 | fverbose-asm |
2e9da478 | 1040 | Common Report Var(flag_verbose_asm) |
72528c71 | 1041 | Add extra commentary to assembler output |
ecdb6d1a | 1042 | |
b212f378 | 1043 | fvisibility= |
1044 | Common Joined RejectNegative | |
1045 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility | |
1046 | ||
1047 | ||
1c6a7b8c | 1048 | fvpt |
2e9da478 | 1049 | Common Report Var(flag_value_profile_transformations) |
1c6a7b8c | 1050 | Use expression value profiles in optimizations |
1051 | ||
eeb4a70e | 1052 | fweb |
472cd78a | 1053 | Common Report Var(flag_web) Init(2) |
eeb4a70e | 1054 | Construct webs and split unrelated uses of single variable |
1055 | ||
62eec3b4 | 1056 | fwhole-program |
1057 | Common Report Var(flag_whole_program) Init(0) | |
1058 | Perform whole program optimizations | |
1059 | ||
ecdb6d1a | 1060 | fwrapv |
2e9da478 | 1061 | Common Report Var(flag_wrapv) |
72528c71 | 1062 | Assume signed arithmetic overflow wraps around |
ecdb6d1a | 1063 | |
ecdb6d1a | 1064 | fzero-initialized-in-bss |
2e9da478 | 1065 | Common Report Var(flag_zero_initialized_in_bss) Init(1) |
72528c71 | 1066 | Put zero initialized data in the bss section |
ecdb6d1a | 1067 | |
6f2f567f | 1068 | g |
1069 | Common JoinedOrMissing | |
b0e56fb1 | 1070 | Generate debug information in default format |
1071 | ||
1072 | gcoff | |
1073 | Common JoinedOrMissing | |
1074 | Generate debug information in COFF format | |
1075 | ||
b0e56fb1 | 1076 | gdwarf-2 |
1077 | Common JoinedOrMissing | |
1078 | Generate debug information in DWARF v2 format | |
1079 | ||
1080 | ggdb | |
1081 | Common JoinedOrMissing | |
1082 | Generate debug information in default extended format | |
1083 | ||
1084 | gstabs | |
1085 | Common JoinedOrMissing | |
1086 | Generate debug information in STABS format | |
1087 | ||
1088 | gstabs+ | |
1089 | Common JoinedOrMissing | |
1090 | Generate debug information in extended STABS format | |
1091 | ||
1092 | gvms | |
1093 | Common JoinedOrMissing | |
1094 | Generate debug information in VMS format | |
1095 | ||
1096 | gxcoff | |
1097 | Common JoinedOrMissing | |
1098 | Generate debug information in XCOFF format | |
1099 | ||
1100 | gxcoff+ | |
1101 | Common JoinedOrMissing | |
1102 | Generate debug information in extended XCOFF format | |
6f2f567f | 1103 | |
e690b385 | 1104 | o |
1105 | Common Joined Separate | |
53b8e5c1 | 1106 | -o <file> Place output into <file> |
e690b385 | 1107 | |
1108 | p | |
2e9da478 | 1109 | Common Var(profile_flag) |
53b8e5c1 | 1110 | Enable function profiling |
e690b385 | 1111 | |
1112 | pedantic | |
2e9da478 | 1113 | Common Var(pedantic) |
53b8e5c1 | 1114 | Issue warnings needed for strict compliance to the standard |
e690b385 | 1115 | |
1116 | pedantic-errors | |
1117 | Common | |
53b8e5c1 | 1118 | Like -pedantic but issue them as errors |
e690b385 | 1119 | |
3272db82 | 1120 | quiet |
2e9da478 | 1121 | Common Var(quiet_flag) |
53b8e5c1 | 1122 | Do not display functions compiled or elapsed time |
3272db82 | 1123 | |
e690b385 | 1124 | version |
2e9da478 | 1125 | Common Var(version_flag) |
53b8e5c1 | 1126 | Display the compiler's version |
e690b385 | 1127 | |
1128 | w | |
2e9da478 | 1129 | Common Var(inhibit_warnings) |
53b8e5c1 | 1130 | Suppress warnings |
e690b385 | 1131 | |
3272db82 | 1132 | ; This comment is to ensure we retain the blank line above. |