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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. | |
a0c938f0 | 11 | ; |
3272db82 | 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. | |
a0c938f0 | 16 | ; |
3272db82 | 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 | |
55972f40 | 112 | Woverflow |
113 | Common Var(warn_overflow) Init(1) | |
114 | Warn about overflow in arithmetic expressions | |
115 | ||
6f2f567f | 116 | Wpacked |
2e9da478 | 117 | Common Var(warn_packed) |
bb0814ce | 118 | Warn when the packed attribute has no effect on struct layout |
6f2f567f | 119 | |
120 | Wpadded | |
2e9da478 | 121 | Common Var(warn_padded) |
bb0814ce | 122 | Warn when padding is required to align structure members |
6f2f567f | 123 | |
124 | Wshadow | |
2e9da478 | 125 | Common Var(warn_shadow) |
bb0814ce | 126 | Warn when one local variable shadows another |
6f2f567f | 127 | |
f1a0edff | 128 | Wstack-protector |
129 | Common Var(warn_stack_protect) | |
130 | Warn when not issuing stack smashing protection for some reason | |
131 | ||
6f2f567f | 132 | Wstrict-aliasing |
133 | Common | |
bb0814ce | 134 | Warn about code which might break strict aliasing rules |
6f2f567f | 135 | |
c1628b55 | 136 | Wstrict-aliasing= |
137 | Common Joined UInteger | |
138 | Warn about code which might break strict aliasing rules | |
139 | ||
19f0596c | 140 | Wstring-literal-comparison |
141 | Common Var(warn_string_literal_comparison) | |
142 | Warn about comparisons to constant string literals | |
143 | ||
6f2f567f | 144 | Wswitch |
2e9da478 | 145 | Common Var(warn_switch) |
bb0814ce | 146 | Warn about enumerated switches, with no default, missing a case |
6f2f567f | 147 | |
148 | Wswitch-default | |
2e9da478 | 149 | Common Var(warn_switch_default) |
bb0814ce | 150 | Warn about enumerated switches missing a \"default:\" statement |
6f2f567f | 151 | |
152 | Wswitch-enum | |
2e9da478 | 153 | Common Var(warn_switch_enum) |
bb0814ce | 154 | Warn about all enumerated switches missing a specific case |
6f2f567f | 155 | |
156 | Wsystem-headers | |
2e9da478 | 157 | Common Var(warn_system_headers) |
72528c71 | 158 | Do not suppress warnings from system headers |
6f2f567f | 159 | |
160 | Wuninitialized | |
2e9da478 | 161 | Common Var(warn_uninitialized) |
bb0814ce | 162 | Warn about uninitialized automatic variables |
6f2f567f | 163 | |
164 | Wunreachable-code | |
2e9da478 | 165 | Common Var(warn_notreached) |
bb0814ce | 166 | Warn about code that will never be executed |
6f2f567f | 167 | |
da3b1bab | 168 | Wunused |
169 | Common | |
53b8e5c1 | 170 | Enable all -Wunused- warnings |
da3b1bab | 171 | |
6f2f567f | 172 | Wunused-function |
2e9da478 | 173 | Common Var(warn_unused_function) |
bb0814ce | 174 | Warn when a function is unused |
6f2f567f | 175 | |
176 | Wunused-label | |
2e9da478 | 177 | Common Var(warn_unused_label) |
bb0814ce | 178 | Warn when a label is unused |
6f2f567f | 179 | |
180 | Wunused-parameter | |
2e9da478 | 181 | Common Var(warn_unused_parameter) |
bb0814ce | 182 | Warn when a function parameter is unused |
6f2f567f | 183 | |
184 | Wunused-value | |
2e9da478 | 185 | Common Var(warn_unused_value) |
bb0814ce | 186 | Warn when an expression value is unused |
6f2f567f | 187 | |
188 | Wunused-variable | |
2e9da478 | 189 | Common Var(warn_unused_variable) |
bb0814ce | 190 | Warn when a variable is unused |
6f2f567f | 191 | |
bf2a1b05 | 192 | Wvolatile-register-var |
193 | Common Var(warn_register_var) | |
194 | Warn when a register variable is declared volatile | |
195 | ||
e690b385 | 196 | aux-info |
197 | Common Separate | |
53b8e5c1 | 198 | -aux-info <file> Emit declaration information into <file> |
e690b385 | 199 | |
200 | aux-info= | |
201 | Common Joined | |
202 | ||
203 | auxbase | |
204 | Common Separate | |
205 | ||
206 | auxbase-strip | |
207 | Common Separate | |
208 | ||
209 | d | |
210 | Common Joined | |
53b8e5c1 | 211 | -d<letters> Enable dumps from specific passes of the compiler |
e690b385 | 212 | |
213 | dumpbase | |
214 | Common Separate | |
53b8e5c1 | 215 | -dumpbase <file> Set the file basename to be used for dumps |
e690b385 | 216 | |
82a16202 | 217 | ; The version of the C++ ABI in use. The following values are allowed: |
218 | ; | |
219 | ; 0: The version of the ABI believed most conformant with the C++ ABI | |
220 | ; specification. This ABI may change as bugs are discovered and fixed. | |
221 | ; Therefore, 0 will not necessarily indicate the same ABI in different | |
222 | ; versions of G++. | |
223 | ; | |
224 | ; 1: The version of the ABI first used in G++ 3.2. | |
225 | ; | |
226 | ; Additional positive integers will be assigned as new versions of | |
227 | ; the ABI become the default version of the ABI. | |
e100aadc | 228 | fabi-version= |
2e9da478 | 229 | Common Joined UInteger Var(flag_abi_version) Init(2) |
e100aadc | 230 | |
ecdb6d1a | 231 | falign-functions |
2e9da478 | 232 | Common Report Var(align_functions,0) |
72528c71 | 233 | Align the start of functions |
ecdb6d1a | 234 | |
941a4893 | 235 | falign-functions= |
236 | Common RejectNegative Joined UInteger | |
237 | ||
ecdb6d1a | 238 | falign-jumps |
2e9da478 | 239 | Common Report Var(align_jumps,0) |
72528c71 | 240 | Align labels which are only reached by jumping |
ecdb6d1a | 241 | |
941a4893 | 242 | falign-jumps= |
243 | Common RejectNegative Joined UInteger | |
244 | ||
ecdb6d1a | 245 | falign-labels |
2e9da478 | 246 | Common Report Var(align_labels,0) |
72528c71 | 247 | Align all labels |
ecdb6d1a | 248 | |
941a4893 | 249 | falign-labels= |
250 | Common RejectNegative Joined UInteger | |
251 | ||
ecdb6d1a | 252 | falign-loops |
2e9da478 | 253 | Common Report Var(align_loops) |
72528c71 | 254 | Align the start of loops |
ecdb6d1a | 255 | |
941a4893 | 256 | falign-loops= |
257 | Common RejectNegative Joined UInteger | |
258 | ||
82a16202 | 259 | ; This flag is only tested if alias checking is enabled. |
260 | ; 0 if pointer arguments may alias each other. True in C. | |
261 | ; 1 if pointer arguments may not alias each other but may alias | |
262 | ; global variables. | |
263 | ; 2 if pointer arguments may not alias each other and may not | |
5ff22aea | 264 | ; alias global variables. |
265 | ; 3 if pointer arguments may not alias anything. True in Fortran. | |
266 | ; Set by the front end. | |
ecdb6d1a | 267 | fargument-alias |
2e9da478 | 268 | Common Report Var(flag_argument_noalias,0) |
72528c71 | 269 | Specify that arguments may alias each other and globals |
ecdb6d1a | 270 | |
271 | fargument-noalias | |
2e9da478 | 272 | Common Report Var(flag_argument_noalias,1) VarExists |
72528c71 | 273 | Assume arguments may alias globals but not each other |
ecdb6d1a | 274 | |
275 | fargument-noalias-global | |
2e9da478 | 276 | Common Report Var(flag_argument_noalias,2) VarExists |
72528c71 | 277 | Assume arguments alias neither each other nor globals |
ecdb6d1a | 278 | |
5ff22aea | 279 | fargument-noalias-anything |
280 | Common Report Var(flag_argument_noalias,3) VarExists | |
281 | Assume arguments alias no other storage | |
282 | ||
ecdb6d1a | 283 | fasynchronous-unwind-tables |
2e9da478 | 284 | Common Report Var(flag_asynchronous_unwind_tables) |
72528c71 | 285 | Generate unwind tables that are exact at each instruction boundary |
ecdb6d1a | 286 | |
82a16202 | 287 | ; -fcheck-bounds causes gcc to generate array bounds checks. |
288 | ; For C, C++ and ObjC: defaults off. | |
289 | ; For Java: defaults to on. | |
290 | ; For Fortran: defaults to off. | |
ecdb6d1a | 291 | fbounds-check |
2e9da478 | 292 | Common Report Var(flag_bounds_check) |
72528c71 | 293 | Generate code to check bounds before indexing arrays |
ecdb6d1a | 294 | |
295 | fbranch-count-reg | |
2e9da478 | 296 | Common Report Var(flag_branch_on_count_reg) Init(1) |
72528c71 | 297 | Replace add, compare, branch with branch on count register |
ecdb6d1a | 298 | |
299 | fbranch-probabilities | |
2e9da478 | 300 | Common Report Var(flag_branch_probabilities) |
72528c71 | 301 | Use profiling information for branch probabilities |
ecdb6d1a | 302 | |
1e06725a | 303 | fbranch-target-load-optimize |
2e9da478 | 304 | Common Report Var(flag_branch_target_load_optimize) |
72528c71 | 305 | Perform branch target load optimization before prologue / epilogue threading |
1e06725a | 306 | |
307 | fbranch-target-load-optimize2 | |
2e9da478 | 308 | Common Report Var(flag_branch_target_load_optimize2) |
72528c71 | 309 | Perform branch target load optimization after prologue / epilogue threading |
1e06725a | 310 | |
08d163a9 | 311 | fbtr-bb-exclusive |
2e9da478 | 312 | Common Report Var(flag_btr_bb_exclusive) |
08d163a9 | 313 | Restrict target load migration not to re-use registers in any basic block |
314 | ||
941a4893 | 315 | fcall-saved- |
316 | Common Joined RejectNegative | |
53b8e5c1 | 317 | -fcall-saved-<register> Mark <register> as being preserved across functions |
941a4893 | 318 | |
319 | fcall-used- | |
320 | Common Joined RejectNegative | |
53b8e5c1 | 321 | -fcall-used-<register> Mark <register> as being corrupted by function calls |
941a4893 | 322 | |
82a16202 | 323 | ; Nonzero for -fcaller-saves: allocate values in regs that need to |
324 | ; be saved across function calls, if that produces overall better code. | |
325 | ; Optional now, so people can test it. | |
1e06725a | 326 | fcaller-saves |
2e9da478 | 327 | Common Report Var(flag_caller_saves) |
72528c71 | 328 | Save registers around function calls |
1e06725a | 329 | |
ecdb6d1a | 330 | fcommon |
2e9da478 | 331 | Common Report Var(flag_no_common,0) |
72528c71 | 332 | Do not put uninitialized globals in the common section |
ecdb6d1a | 333 | |
334 | fcprop-registers | |
2e9da478 | 335 | Common Report Var(flag_cprop_registers) |
72528c71 | 336 | Perform a register copy-propagation optimization pass |
ecdb6d1a | 337 | |
1e06725a | 338 | fcrossjumping |
2e9da478 | 339 | Common Report Var(flag_crossjumping) |
72528c71 | 340 | Perform cross-jumping optimization |
1e06725a | 341 | |
342 | fcse-follow-jumps | |
2e9da478 | 343 | Common Report Var(flag_cse_follow_jumps) |
72528c71 | 344 | When running CSE, follow jumps to their targets |
1e06725a | 345 | |
346 | fcse-skip-blocks | |
2e9da478 | 347 | Common Report Var(flag_cse_skip_blocks) |
72528c71 | 348 | When running CSE, follow conditional jumps |
1e06725a | 349 | |
45b9d334 | 350 | fcx-limited-range |
351 | Common Report Var(flag_cx_limited_range) | |
352 | Omit range reduction step when performing complex division | |
353 | ||
ecdb6d1a | 354 | fdata-sections |
2e9da478 | 355 | Common Report Var(flag_data_sections) |
72528c71 | 356 | Place data items into their own section |
ecdb6d1a | 357 | |
82a16202 | 358 | ; Nonzero for -fdefer-pop: don't pop args after each function call |
359 | ; instead save them up to pop many calls' args with one insns. | |
1e06725a | 360 | fdefer-pop |
2e9da478 | 361 | Common Report Var(flag_defer_pop) |
72528c71 | 362 | Defer popping functions args from stack until later |
1e06725a | 363 | |
364 | fdelayed-branch | |
2e9da478 | 365 | Common Report Var(flag_delayed_branch) |
72528c71 | 366 | Attempt to fill delay slots of branch instructions |
1e06725a | 367 | |
368 | fdelete-null-pointer-checks | |
2e9da478 | 369 | Common Report Var(flag_delete_null_pointer_checks) |
72528c71 | 370 | Delete useless null pointer checks |
1e06725a | 371 | |
372 | fdiagnostics-show-location= | |
373 | Common Joined RejectNegative | |
53b8e5c1 | 374 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics |
1e06725a | 375 | |
efb9d9ee | 376 | fdiagnostics-show-option |
b0932b2f | 377 | Common |
3284a242 | 378 | Amend appropriate diagnostic messages with the command line option that controls them |
efb9d9ee | 379 | |
4ee9c684 | 380 | fdump- |
381 | Common Joined RejectNegative | |
382 | -fdump-<type> Dump various compiler internals to a file | |
383 | ||
969239ad | 384 | fdump-noaddr |
385 | Common Report Var(flag_dump_noaddr) | |
386 | Suppress output of addresses in debugging dumps | |
387 | ||
ecdb6d1a | 388 | fdump-unnumbered |
2e9da478 | 389 | Common Report Var(flag_dump_unnumbered) VarExists |
969239ad | 390 | Suppress output of instruction numbers, line number notes and addresses in debugging dumps |
ecdb6d1a | 391 | |
f1aa280c | 392 | fearly-inlining |
393 | Common Report Var(flag_early_inlining) Init(1) | |
394 | Perform early inlining | |
395 | ||
1e06725a | 396 | feliminate-dwarf2-dups |
2e9da478 | 397 | Common Report Var(flag_eliminate_dwarf2_dups) |
72528c71 | 398 | Perform DWARF2 duplicate elimination |
1e06725a | 399 | |
262444a6 | 400 | feliminate-unused-debug-symbols |
2e9da478 | 401 | Common Report Var(flag_debug_only_used_symbols) |
72528c71 | 402 | Perform unused type elimination in debug info |
262444a6 | 403 | |
1e06725a | 404 | feliminate-unused-debug-types |
2e9da478 | 405 | Common Report Var(flag_eliminate_unused_debug_types) Init(1) |
72528c71 | 406 | Perform unused type elimination in debug info |
1e06725a | 407 | |
0c573f98 | 408 | femit-class-debug-always |
409 | Common Report Var(flag_emit_class_debug_always) Init(1) | |
410 | Do not suppress C++ class debug information. | |
411 | ||
ecdb6d1a | 412 | fexceptions |
2e9da478 | 413 | Common Report Var(flag_exceptions) |
72528c71 | 414 | Enable exception handling |
ecdb6d1a | 415 | |
1e06725a | 416 | fexpensive-optimizations |
2e9da478 | 417 | Common Report Var(flag_expensive_optimizations) |
72528c71 | 418 | Perform a number of minor, expensive optimizations |
1e06725a | 419 | |
941a4893 | 420 | ffast-math |
421 | Common | |
422 | ||
ecdb6d1a | 423 | ffinite-math-only |
2e9da478 | 424 | Common Report Var(flag_finite_math_only) |
72528c71 | 425 | Assume no NaNs or infinities are generated |
ecdb6d1a | 426 | |
941a4893 | 427 | ffixed- |
428 | Common Joined RejectNegative | |
53b8e5c1 | 429 | -ffixed-<register> Mark <register> as being unavailable to the compiler |
941a4893 | 430 | |
1e06725a | 431 | ffloat-store |
2e9da478 | 432 | Common Report Var(flag_float_store) |
82a16202 | 433 | Don't allocate floats and doubles in extended-precision registers |
1e06725a | 434 | |
82a16202 | 435 | ; Nonzero for -fforce-addr: load memory address into a register before |
436 | ; reference to memory. This makes better cse but slower compilation. | |
1e06725a | 437 | fforce-addr |
2e9da478 | 438 | Common Report Var(flag_force_addr) |
72528c71 | 439 | Copy memory address constants into registers before use |
1e06725a | 440 | |
82a16202 | 441 | ; Nonzero for -fforce-mem: load memory value into a register |
442 | ; before arithmetic on it. This makes better cse but slower compilation. | |
1e06725a | 443 | fforce-mem |
2e9da478 | 444 | Common Report Var(flag_force_mem) |
72528c71 | 445 | Copy memory operands into registers before use |
1e06725a | 446 | |
82a16202 | 447 | ; Nonzero means don't put addresses of constant functions in registers. |
448 | ; Used for compiling the Unix kernel, where strange substitutions are | |
449 | ; done on the assembly output. | |
1e06725a | 450 | ffunction-cse |
2e9da478 | 451 | Common Report Var(flag_no_function_cse,0) |
72528c71 | 452 | Allow function addresses to be held in registers |
1e06725a | 453 | |
ecdb6d1a | 454 | ffunction-sections |
2e9da478 | 455 | Common Report Var(flag_function_sections) |
72528c71 | 456 | Place each function into its own section |
ecdb6d1a | 457 | |
1e06725a | 458 | fgcse |
2e9da478 | 459 | Common Report Var(flag_gcse) |
72528c71 | 460 | Perform global common subexpression elimination |
1e06725a | 461 | |
462 | fgcse-lm | |
2e9da478 | 463 | Common Report Var(flag_gcse_lm) Init(1) |
72528c71 | 464 | Perform enhanced load motion during global common subexpression elimination |
1e06725a | 465 | |
466 | fgcse-sm | |
62434574 | 467 | Common Report Var(flag_gcse_sm) Init(0) |
72528c71 | 468 | Perform store motion after global common subexpression elimination |
1e06725a | 469 | |
5c47e414 | 470 | fgcse-las |
62434574 | 471 | Common Report Var(flag_gcse_las) Init(0) |
839f8415 | 472 | Perform redundant load after store elimination in global common subexpression |
473 | elimination | |
474 | ||
475 | fgcse-after-reload | |
868e8f12 | 476 | Common Report Var(flag_gcse_after_reload) |
839f8415 | 477 | Perform global common subexpression elimination after register allocation |
3284a242 | 478 | has finished |
5c47e414 | 479 | |
ecdb6d1a | 480 | fguess-branch-probability |
2e9da478 | 481 | Common Report Var(flag_guess_branch_prob) |
72528c71 | 482 | Enable guessing of branch probabilities |
ecdb6d1a | 483 | |
82a16202 | 484 | ; Nonzero means ignore `#ident' directives. 0 means handle them. |
485 | ; Generate position-independent code for executables if possible | |
486 | ; On SVR4 targets, it also controls whether or not to emit a | |
487 | ; string identifying the compiler. | |
ecdb6d1a | 488 | fident |
2e9da478 | 489 | Common Report Var(flag_no_ident,0) |
72528c71 | 490 | Process #ident directives |
ecdb6d1a | 491 | |
1e06725a | 492 | fif-conversion |
2e9da478 | 493 | Common Report Var(flag_if_conversion) |
72528c71 | 494 | Perform conversion of conditional jumps to branchless equivalents |
1e06725a | 495 | |
496 | fif-conversion2 | |
2e9da478 | 497 | Common Report Var(flag_if_conversion2) |
72528c71 | 498 | Perform conversion of conditional jumps to conditional execution |
1e06725a | 499 | |
82a16202 | 500 | ; -finhibit-size-directive inhibits output of .size for ELF. |
501 | ; This is used only for compiling crtstuff.c, | |
502 | ; and it may be extended to other effects | |
503 | ; needed for crtstuff.c on other systems. | |
ecdb6d1a | 504 | finhibit-size-directive |
2e9da478 | 505 | Common Report Var(flag_inhibit_size_directive) |
72528c71 | 506 | Do not generate .size directives |
ecdb6d1a | 507 | |
82a16202 | 508 | ; Nonzero means that functions declared `inline' will be treated |
509 | ; as `static'. Prevents generation of zillions of copies of unused | |
510 | ; static inline functions; instead, `inlines' are written out | |
511 | ; only when actually used. Used in conjunction with -g. Also | |
512 | ; does the right thing with #pragma interface. | |
1e06725a | 513 | finline |
2e9da478 | 514 | Common Report Var(flag_no_inline,0) Init(2) |
72528c71 | 515 | Pay attention to the \"inline\" keyword |
1e06725a | 516 | |
517 | finline-functions | |
2e9da478 | 518 | Common Report Var(flag_inline_functions) |
72528c71 | 519 | Integrate simple functions into their callers |
1e06725a | 520 | |
f1aa280c | 521 | finline-functions-called-once |
522 | Common Report Var(flag_inline_functions_called_once) Init(1) | |
523 | Integrate functions called once into their callers | |
9e0baf4d | 524 | |
39470ac3 | 525 | finline-limit- |
526 | Common RejectNegative Joined UInteger | |
527 | ||
528 | finline-limit= | |
529 | Common RejectNegative Joined UInteger | |
53b8e5c1 | 530 | -finline-limit=<number> Limit the size of inlined functions to <number> |
39470ac3 | 531 | |
ecdb6d1a | 532 | finstrument-functions |
2e9da478 | 533 | Common Report Var(flag_instrument_function_entry_exit) |
72528c71 | 534 | Instrument function entry and exit with profiling calls |
ecdb6d1a | 535 | |
a17a73c7 | 536 | fipa-cp |
537 | Common Report Var(flag_ipa_cp) | |
538 | Perform Interprocedural constant propagation | |
539 | ||
f7d118a9 | 540 | fipa-pure-const |
541 | Common Report Var(flag_ipa_pure_const) Init(0) | |
542 | Discover pure and const functions | |
543 | ||
bdf4f142 | 544 | fipa-pta |
545 | Common Report Var(flag_ipa_pta) Init(0) | |
546 | Perform interprocedural points-to analysis | |
547 | ||
f7d118a9 | 548 | fipa-reference |
549 | Common Report Var(flag_ipa_reference) Init(0) | |
550 | Discover readonly and non addressable static variables | |
551 | ||
552 | fipa-type-escape | |
553 | Common Report Var(flag_ipa_type_escape) Init(0) | |
554 | Type based escape and alias analysis | |
555 | ||
dec41e98 | 556 | fivopts |
557 | Common Report Var(flag_ivopts) Init(1) | |
558 | Optimize induction variables on trees | |
559 | ||
51d8e657 | 560 | fjump-tables |
561 | Common Var(flag_jump_tables) Init(1) | |
562 | Use jump tables for sufficiently large switch statements | |
563 | ||
1e06725a | 564 | fkeep-inline-functions |
2e9da478 | 565 | Common Report Var(flag_keep_inline_functions) |
72528c71 | 566 | Generate code for functions even if they are fully inlined |
1e06725a | 567 | |
568 | fkeep-static-consts | |
2e9da478 | 569 | Common Report Var(flag_keep_static_consts) Init(1) |
72528c71 | 570 | Emit static const variables even if they are not used |
1e06725a | 571 | |
ecdb6d1a | 572 | fleading-underscore |
2e9da478 | 573 | Common Report Var(flag_leading_underscore) Init(-1) |
72528c71 | 574 | Give external symbols a leading underscore |
ecdb6d1a | 575 | |
4f87b914 | 576 | floop-optimize |
577 | Common | |
334ec2d8 | 578 | Does nothing. Preserved for backward compatibility. |
4f87b914 | 579 | |
ecdb6d1a | 580 | fmath-errno |
2e9da478 | 581 | Common Report Var(flag_errno_math) Init(1) |
72528c71 | 582 | Set errno after built-in math functions |
ecdb6d1a | 583 | |
584 | fmem-report | |
2e9da478 | 585 | Common Report Var(mem_report) |
72528c71 | 586 | Report on permanent memory allocation |
ecdb6d1a | 587 | |
82a16202 | 588 | ; This will attempt to merge constant section constants, if 1 only |
589 | ; string constants and constants from constant pool, if 2 also constant | |
590 | ; variables. | |
ecdb6d1a | 591 | fmerge-all-constants |
2e9da478 | 592 | Common Report Var(flag_merge_constants,2) Init(1) |
72528c71 | 593 | Attempt to merge identical constants and constant variables |
ecdb6d1a | 594 | |
595 | fmerge-constants | |
2e9da478 | 596 | Common Report Var(flag_merge_constants,1) VarExists |
72528c71 | 597 | Attempt to merge identical constants across compilation units |
ecdb6d1a | 598 | |
1e06725a | 599 | fmessage-length= |
600 | Common RejectNegative Joined UInteger | |
53b8e5c1 | 601 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping |
1e06725a | 602 | |
406a73e7 | 603 | fmodulo-sched |
2e9da478 | 604 | Common Report Var(flag_modulo_sched) |
406a73e7 | 605 | Perform SMS based modulo scheduling before the first scheduling pass |
606 | ||
3a0ecac2 | 607 | fmove-loop-invariants |
a82484af | 608 | Common Report Var(flag_move_loop_invariants) Init(1) |
3a0ecac2 | 609 | Move loop invariant computations out of loops |
610 | ||
4ee9c684 | 611 | fmudflap |
2e9da478 | 612 | Common RejectNegative Report Var(flag_mudflap) |
3284a242 | 613 | Add mudflap bounds-checking instrumentation for single-threaded program |
4ee9c684 | 614 | |
615 | fmudflapth | |
c1d36cca | 616 | Common RejectNegative Report VarExists Var(flag_mudflap,2) |
3284a242 | 617 | Add mudflap bounds-checking instrumentation for multi-threaded program |
4ee9c684 | 618 | |
619 | fmudflapir | |
2e9da478 | 620 | Common RejectNegative Report Var(flag_mudflap_ignore_reads) |
3284a242 | 621 | Ignore read operations when inserting mudflap instrumentation |
4ee9c684 | 622 | |
f045d41d | 623 | freschedule-modulo-scheduled-loops |
624 | Common Report Var(flag_resched_modulo_sched) | |
625 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling | |
626 | ||
ecdb6d1a | 627 | fnon-call-exceptions |
2e9da478 | 628 | Common Report Var(flag_non_call_exceptions) |
72528c71 | 629 | Support synchronous non-call exceptions |
ecdb6d1a | 630 | |
1e06725a | 631 | fomit-frame-pointer |
2e9da478 | 632 | Common Report Var(flag_omit_frame_pointer) |
72528c71 | 633 | When possible do not generate stack frames |
1e06725a | 634 | |
ecdb6d1a | 635 | foptimize-register-move |
2e9da478 | 636 | Common Report Var(flag_regmove) |
72528c71 | 637 | Do the full register move optimization pass |
ecdb6d1a | 638 | |
1e06725a | 639 | foptimize-sibling-calls |
2e9da478 | 640 | Common Report Var(flag_optimize_sibling_calls) |
72528c71 | 641 | Optimize sibling and tail recursive calls |
1e06725a | 642 | |
ecdb6d1a | 643 | fpack-struct |
2e9da478 | 644 | Common Report Var(flag_pack_struct) |
72528c71 | 645 | Pack structure members together without holes |
ecdb6d1a | 646 | |
6b5553e5 | 647 | fpack-struct= |
648 | Common RejectNegative Joined UInteger | |
649 | -fpack-struct=<number> Set initial maximum structure member alignment | |
650 | ||
1e06725a | 651 | fpcc-struct-return |
2e9da478 | 652 | Common Report Var(flag_pcc_struct_return,1) VarExists |
72528c71 | 653 | Return small aggregates in memory, not registers |
1e06725a | 654 | |
655 | fpeel-loops | |
2e9da478 | 656 | Common Report Var(flag_peel_loops) |
72528c71 | 657 | Perform loop peeling |
1e06725a | 658 | |
659 | fpeephole | |
2e9da478 | 660 | Common Report Var(flag_no_peephole,0) |
72528c71 | 661 | Enable machine specific peephole optimizations |
1e06725a | 662 | |
ecdb6d1a | 663 | fpeephole2 |
2e9da478 | 664 | Common Report Var(flag_peephole2) |
72528c71 | 665 | Enable an RTL peephole pass before sched2 |
ecdb6d1a | 666 | |
82a16202 | 667 | fPIC |
668 | Common Report Var(flag_pic,2) | |
669 | Generate position-independent code if possible (large mode) | |
670 | ||
671 | fPIE | |
672 | Common Report Var(flag_pie,2) | |
673 | Generate position-independent code for executables if possible (large mode) | |
674 | ||
ecdb6d1a | 675 | fpic |
2e9da478 | 676 | Common Report Var(flag_pic,1) VarExists |
82a16202 | 677 | Generate position-independent code if possible (small mode) |
ecdb6d1a | 678 | |
679 | fpie | |
2e9da478 | 680 | Common Report Var(flag_pie,1) VarExists |
82a16202 | 681 | Generate position-independent code for executables if possible (small mode) |
ecdb6d1a | 682 | |
1e06725a | 683 | fprefetch-loop-arrays |
4f87b914 | 684 | Common Report Var(flag_prefetch_loop_arrays) |
72528c71 | 685 | Generate prefetch instructions, if available, for arrays in loops |
1e06725a | 686 | |
ecdb6d1a | 687 | fprofile |
2e9da478 | 688 | Common Report Var(profile_flag) |
72528c71 | 689 | Enable basic program profiling code |
ecdb6d1a | 690 | |
691 | fprofile-arcs | |
2e9da478 | 692 | Common Report Var(profile_arc_flag) |
72528c71 | 693 | Insert arc-based program profiling code |
ecdb6d1a | 694 | |
7dea76ba | 695 | fprofile-generate |
696 | Common | |
697 | Enable common options for generating profile info for profile feedback directed optimizations | |
698 | ||
699 | fprofile-use | |
700 | Common | |
701 | Enable common options for performing profile feedback directed optimizations | |
702 | ||
1c6a7b8c | 703 | fprofile-values |
2e9da478 | 704 | Common Report Var(flag_profile_values) |
1c6a7b8c | 705 | Insert code to profile values of expressions |
706 | ||
1e06725a | 707 | frandom-seed |
708 | Common | |
709 | ||
710 | frandom-seed= | |
711 | Common Joined RejectNegative | |
53b8e5c1 | 712 | -frandom-seed=<string> Make compile reproducible using <string> |
1e06725a | 713 | |
1e06725a | 714 | freg-struct-return |
2e9da478 | 715 | Common Report Var(flag_pcc_struct_return,0) VarExists |
72528c71 | 716 | Return small aggregates in registers |
1e06725a | 717 | |
ecdb6d1a | 718 | fregmove |
2e9da478 | 719 | Common Report Var(flag_regmove) |
72528c71 | 720 | Enables a register move optimization |
ecdb6d1a | 721 | |
722 | frename-registers | |
472cd78a | 723 | Common Report Var(flag_rename_registers) Init(2) |
72528c71 | 724 | Perform a register renaming optimization pass |
ecdb6d1a | 725 | |
726 | freorder-blocks | |
2e9da478 | 727 | Common Report Var(flag_reorder_blocks) |
72528c71 | 728 | Reorder basic blocks to improve code placement |
ecdb6d1a | 729 | |
4f18499c | 730 | freorder-blocks-and-partition |
2e9da478 | 731 | Common Report Var(flag_reorder_blocks_and_partition) |
4f18499c | 732 | Reorder basic blocks and partition into hot and cold sections |
733 | ||
ecdb6d1a | 734 | freorder-functions |
2e9da478 | 735 | Common Report Var(flag_reorder_functions) |
72528c71 | 736 | Reorder functions to improve code placement |
ecdb6d1a | 737 | |
1e06725a | 738 | frerun-cse-after-loop |
868e8f12 | 739 | Common Report Var(flag_rerun_cse_after_loop) Init(2) |
72528c71 | 740 | Add a common subexpression elimination pass after loop optimizations |
1e06725a | 741 | |
4f87b914 | 742 | frerun-loop-opt |
743 | Common | |
334ec2d8 | 744 | Does nothing. Preserved for backward compatibility. |
4f87b914 | 745 | |
5466f589 | 746 | frounding-math |
2e9da478 | 747 | Common Report Var(flag_rounding_math) |
5466f589 | 748 | Disable optimizations that assume default FP rounding behavior |
749 | ||
ecdb6d1a | 750 | fsched-interblock |
2e9da478 | 751 | Common Report Var(flag_schedule_interblock) Init(1) |
72528c71 | 752 | Enable scheduling across basic blocks |
ecdb6d1a | 753 | |
754 | fsched-spec | |
2e9da478 | 755 | Common Report Var(flag_schedule_speculative) Init(1) |
72528c71 | 756 | Allow speculative motion of non-loads |
ecdb6d1a | 757 | |
758 | fsched-spec-load | |
2e9da478 | 759 | Common Report Var(flag_schedule_speculative_load) |
72528c71 | 760 | Allow speculative motion of some loads |
ecdb6d1a | 761 | |
762 | fsched-spec-load-dangerous | |
2e9da478 | 763 | Common Report Var(flag_schedule_speculative_load_dangerous) |
72528c71 | 764 | Allow speculative motion of more loads |
ecdb6d1a | 765 | |
1e06725a | 766 | fsched-verbose= |
767 | Common RejectNegative Joined | |
53b8e5c1 | 768 | -fsched-verbose=<number> Set the verbosity level of the scheduler |
1e06725a | 769 | |
ecdb6d1a | 770 | fsched2-use-superblocks |
2e9da478 | 771 | Common Report Var(flag_sched2_use_superblocks) |
72528c71 | 772 | If scheduling post reload, do superblock scheduling |
ecdb6d1a | 773 | |
774 | fsched2-use-traces | |
2e9da478 | 775 | Common Report Var(flag_sched2_use_traces) |
72528c71 | 776 | If scheduling post reload, do trace scheduling |
ecdb6d1a | 777 | |
1e06725a | 778 | fschedule-insns |
2e9da478 | 779 | Common Report Var(flag_schedule_insns) |
72528c71 | 780 | Reschedule instructions before register allocation |
1e06725a | 781 | |
782 | fschedule-insns2 | |
2e9da478 | 783 | Common Report Var(flag_schedule_insns_after_reload) |
72528c71 | 784 | Reschedule instructions after register allocation |
1e06725a | 785 | |
82a16202 | 786 | ; sched_stalled_insns means that insns can be moved prematurely from the queue |
787 | ; of stalled insns into the ready list. | |
52c4b43f | 788 | fsched-stalled-insns |
2e9da478 | 789 | Common Report Var(flag_sched_stalled_insns) |
52c4b43f | 790 | Allow premature scheduling of queued insns |
791 | ||
792 | fsched-stalled-insns= | |
a0c938f0 | 793 | Common RejectNegative Joined UInteger |
98b93ebb | 794 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled |
52c4b43f | 795 | |
82a16202 | 796 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will |
797 | ; be examined for a dependency on a stalled insn that is candidate for | |
798 | ; premature removal from the queue of stalled insns into the ready list (has | |
799 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
52c4b43f | 800 | fsched-stalled-insns-dep |
2e9da478 | 801 | Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) |
52c4b43f | 802 | Set dependence distance checking in premature scheduling of queued insns |
803 | ||
804 | fsched-stalled-insns-dep= | |
805 | Common RejectNegative Joined UInteger | |
98b93ebb | 806 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns |
52c4b43f | 807 | |
f2d0e9f1 | 808 | fsection-anchors |
809 | Common Report Var(flag_section_anchors) | |
810 | Access data in the same section from shared anchor points | |
811 | ||
89140b26 | 812 | frtl-abstract-sequences |
813 | Common Report Var(flag_rtl_seqabstr) | |
814 | Perform sequence abstraction optimization on RTL | |
815 | ||
2b74c150 | 816 | fsee |
817 | Common Report Var(flag_see) Init(0) | |
818 | Eliminate redundant sign extensions using LCM. | |
819 | ||
5fd4bf3b | 820 | fshow-column |
821 | Common C ObjC C++ ObjC++ Report Var(flag_show_column) Init(1) | |
3284a242 | 822 | Show column numbers in diagnostics, when available. Default on |
5fd4bf3b | 823 | |
ecdb6d1a | 824 | fsignaling-nans |
2e9da478 | 825 | Common Report Var(flag_signaling_nans) |
72528c71 | 826 | Disable optimizations observable by IEEE signaling NaNs |
ecdb6d1a | 827 | |
828 | fsingle-precision-constant | |
2e9da478 | 829 | Common Report Var(flag_single_precision_constant) |
72528c71 | 830 | Convert floating point constants to single precision constants |
ecdb6d1a | 831 | |
a9989fb4 | 832 | fsplit-ivs-in-unroller |
833 | Common Report Var(flag_split_ivs_in_unroller) Init(1) | |
3284a242 | 834 | Split lifetimes of induction variables when loops are unrolled |
a9989fb4 | 835 | |
375bb675 | 836 | fvariable-expansion-in-unroller |
a0c938f0 | 837 | Common Report Var(flag_variable_expansion_in_unroller) |
3284a242 | 838 | Apply variable expansion when loops are unrolled |
375bb675 | 839 | |
82a16202 | 840 | ; Emit code to probe the stack, to help detect stack overflow; also |
841 | ; may cause large objects to be allocated dynamically. | |
ecdb6d1a | 842 | fstack-check |
2e9da478 | 843 | Common Report Var(flag_stack_check) |
72528c71 | 844 | Insert stack checking code into the program |
ecdb6d1a | 845 | |
1e06725a | 846 | fstack-limit |
847 | Common | |
848 | ||
941a4893 | 849 | fstack-limit-register= |
850 | Common RejectNegative Joined | |
53b8e5c1 | 851 | -fstack-limit-register=<register> Trap if the stack goes past <register> |
941a4893 | 852 | |
853 | fstack-limit-symbol= | |
854 | Common RejectNegative Joined | |
53b8e5c1 | 855 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name> |
941a4893 | 856 | |
f1a0edff | 857 | fstack-protector |
858 | Common Report Var(flag_stack_protect, 1) | |
859 | Use propolice as a stack protection method | |
860 | ||
861 | fstack-protector-all | |
862 | Common Report RejectNegative Var(flag_stack_protect, 2) VarExists | |
863 | Use a stack protection method for every function | |
864 | ||
1e06725a | 865 | fstrength-reduce |
4f87b914 | 866 | Common |
334ec2d8 | 867 | Does nothing. Preserved for backward compatibility. |
1e06725a | 868 | |
82a16202 | 869 | ; Nonzero if we should do (language-dependent) alias analysis. |
870 | ; Typically, this analysis will assume that expressions of certain | |
871 | ; types do not alias expressions of certain other types. Only used | |
872 | ; if alias analysis (in general) is enabled. | |
ecdb6d1a | 873 | fstrict-aliasing |
2e9da478 | 874 | Common Report Var(flag_strict_aliasing) |
72528c71 | 875 | Assume strict aliasing rules apply |
ecdb6d1a | 876 | |
1e06725a | 877 | fsyntax-only |
2e9da478 | 878 | Common Report Var(flag_syntax_only) |
72528c71 | 879 | Check for syntax errors, then stop |
1e06725a | 880 | |
ecdb6d1a | 881 | ftest-coverage |
2e9da478 | 882 | Common Report Var(flag_test_coverage) |
72528c71 | 883 | Create data files needed by \"gcov\" |
ecdb6d1a | 884 | |
1e06725a | 885 | fthread-jumps |
2e9da478 | 886 | Common Report Var(flag_thread_jumps) |
72528c71 | 887 | Perform jump threading optimizations |
1e06725a | 888 | |
ecdb6d1a | 889 | ftime-report |
2e9da478 | 890 | Common Report Var(time_report) |
72528c71 | 891 | Report the time taken by each compiler pass |
ecdb6d1a | 892 | |
941a4893 | 893 | ftls-model= |
894 | Common Joined RejectNegative | |
53b8e5c1 | 895 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model |
941a4893 | 896 | |
56af936e | 897 | ftoplevel-reorder |
898 | Common Report Var(flag_toplevel_reorder) Init(1) | |
899 | Reorder top level functions, variables, and asms | |
900 | ||
1e06725a | 901 | ftracer |
2e9da478 | 902 | Common Report Var(flag_tracer) |
72528c71 | 903 | Perform superblock formation via tail duplication |
1e06725a | 904 | |
82a16202 | 905 | ; Zero means that floating-point math operations cannot generate a |
906 | ; (user-visible) trap. This is the case, for example, in nonstop | |
907 | ; IEEE 754 arithmetic. | |
ecdb6d1a | 908 | ftrapping-math |
a619b050 | 909 | Common Report Var(flag_trapping_math) Init(1) |
72528c71 | 910 | Assume floating-point operations can trap |
ecdb6d1a | 911 | |
912 | ftrapv | |
2e9da478 | 913 | Common Report Var(flag_trapv) |
72528c71 | 914 | Trap for signed overflow in addition, subtraction and multiplication |
ecdb6d1a | 915 | |
4ee9c684 | 916 | ftree-ccp |
2e9da478 | 917 | Common Report Var(flag_tree_ccp) |
4ee9c684 | 918 | Enable SSA-CCP optimization on trees |
919 | ||
88dbf20f | 920 | ftree-store-ccp |
921 | Common Report Var(flag_tree_store_ccp) | |
922 | Enable SSA-CCP optimization for stores and loads | |
923 | ||
4ee9c684 | 924 | ftree-ch |
2e9da478 | 925 | Common Report Var(flag_tree_ch) |
4ee9c684 | 926 | Enable loop header copying on trees |
927 | ||
928 | ftree-combine-temps | |
2e9da478 | 929 | Common Report Var(flag_tree_combine_temps) |
4ee9c684 | 930 | Coalesce memory temporaries in the SSA->normal pass |
931 | ||
932 | ftree-copyrename | |
2e9da478 | 933 | Common Report Var(flag_tree_copyrename) |
3284a242 | 934 | Replace SSA temporaries with better names in copies |
4ee9c684 | 935 | |
88dbf20f | 936 | ftree-copy-prop |
937 | Common Report Var(flag_tree_copy_prop) | |
938 | Enable copy propagation on trees | |
939 | ||
940 | ftree-store-copy-prop | |
941 | Common Report Var(flag_tree_store_copy_prop) | |
942 | Enable copy propagation for stores and loads | |
943 | ||
4ee9c684 | 944 | ftree-dce |
2e9da478 | 945 | Common Report Var(flag_tree_dce) |
4ee9c684 | 946 | Enable SSA dead code elimination optimization on trees |
947 | ||
948 | ftree-dominator-opts | |
2e9da478 | 949 | Common Report Var(flag_tree_dom) |
4ee9c684 | 950 | Enable dominator optimizations |
951 | ||
952 | ftree-dse | |
2e9da478 | 953 | Common Report Var(flag_tree_dse) |
4ee9c684 | 954 | Enable dead store elimination |
955 | ||
591c2a30 | 956 | ftree-fre |
957 | Common Report Var(flag_tree_fre) | |
958 | Enable Full Redundancy Elimination (FRE) on trees | |
959 | ||
41b5cc78 | 960 | ftree-loop-im |
961 | Common Report Var(flag_tree_loop_im) Init(1) | |
7d23383d | 962 | Enable loop invariant motion on trees |
963 | ||
60cfcb79 | 964 | ftree-loop-linear |
965 | Common Report Var(flag_tree_loop_linear) | |
966 | Enable linear loop transforms on trees | |
967 | ||
41b5cc78 | 968 | ftree-loop-ivcanon |
08162157 | 969 | Common Report Var(flag_tree_loop_ivcanon) Init(1) |
41b5cc78 | 970 | Create canonical induction variables in loops |
971 | ||
dcb9eccb | 972 | ftree-loop-optimize |
973 | Common Report Var(flag_tree_loop_optimize) Init(1) | |
974 | Enable loop optimizations on tree level | |
975 | ||
4ee9c684 | 976 | ftree-pre |
2e9da478 | 977 | Common Report Var(flag_tree_pre) |
4ee9c684 | 978 | Enable SSA-PRE optimization on trees |
979 | ||
2be14d8b | 980 | ftree-salias |
981 | Common Report Var(flag_tree_salias) | |
982 | Perform structural alias analysis | |
983 | ||
5e733b02 | 984 | ftree-sink |
985 | Common Report Var(flag_tree_sink) | |
986 | Enable SSA code sinking on trees | |
987 | ||
4ee9c684 | 988 | ftree-sra |
2e9da478 | 989 | Common Report Var(flag_tree_sra) |
4ee9c684 | 990 | Perform scalar replacement of aggregates |
991 | ||
992 | ftree-ter | |
2e9da478 | 993 | Common Report Var(flag_tree_ter) |
4ee9c684 | 994 | Replace temporary expressions in the SSA->normal pass |
995 | ||
996 | ftree-lrs | |
2e9da478 | 997 | Common Report Var(flag_tree_live_range_split) |
3284a242 | 998 | Perform live range splitting during the SSA->normal pass |
4ee9c684 | 999 | |
88dbf20f | 1000 | ftree-vrp |
1001 | Common Report Var(flag_tree_vrp) Init(0) | |
1002 | Perform Value Range Propagation on trees | |
1003 | ||
1e06725a | 1004 | funit-at-a-time |
2e9da478 | 1005 | Common Report Var(flag_unit_at_a_time) |
72528c71 | 1006 | Compile whole compilation unit at a time |
1e06725a | 1007 | |
1008 | funroll-loops | |
2e9da478 | 1009 | Common Report Var(flag_unroll_loops) |
72528c71 | 1010 | Perform loop unrolling when iteration count is known |
1e06725a | 1011 | |
1012 | funroll-all-loops | |
2e9da478 | 1013 | Common Report Var(flag_unroll_all_loops) |
72528c71 | 1014 | Perform loop unrolling for all loops |
1e06725a | 1015 | |
7e3cc681 | 1016 | ; Nonzero means that loop optimizer may assume that the induction variables |
1017 | ; that control loops do not overflow and that the loops with nontrivial | |
1018 | ; exit condition are not infinite | |
1019 | funsafe-loop-optimizations | |
1020 | Common Report Var(flag_unsafe_loop_optimizations) | |
1021 | Allow loop optimizations to assume that the loops behave in normal way | |
1022 | ||
82a16202 | 1023 | ; Nonzero means that unsafe floating-point math optimizations are allowed |
1024 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
1025 | ; are allowed to assume that their arguments and results are "normal" | |
1026 | ; (e.g., nonnegative for SQRT). | |
ecdb6d1a | 1027 | funsafe-math-optimizations |
2e9da478 | 1028 | Common Report Var(flag_unsafe_math_optimizations) |
72528c71 | 1029 | Allow math optimizations that may violate IEEE or ISO standards |
ecdb6d1a | 1030 | |
1e06725a | 1031 | funswitch-loops |
2e9da478 | 1032 | Common Report Var(flag_unswitch_loops) |
72528c71 | 1033 | Perform loop unswitching |
1e06725a | 1034 | |
ecdb6d1a | 1035 | funwind-tables |
2e9da478 | 1036 | Common Report Var(flag_unwind_tables) |
72528c71 | 1037 | Just generate unwind tables for exception handling |
ecdb6d1a | 1038 | |
5923a5e7 | 1039 | fvar-tracking |
2e9da478 | 1040 | Common Report Var(flag_var_tracking) VarExists |
5923a5e7 | 1041 | Perform variable tracking |
1042 | ||
c91e8223 | 1043 | ftree-vectorize |
1044 | Common Report Var(flag_tree_vectorize) | |
1045 | Enable loop vectorization on trees | |
1046 | ||
25e3c2e8 | 1047 | ftree-vect-loop-version |
1048 | Common Report Var(flag_tree_vect_loop_version) Init(1) | |
1049 | Enable loop versioning when doing loop vectorization on trees | |
1050 | ||
459e8543 | 1051 | ftree-vectorizer-verbose= |
1052 | Common RejectNegative Joined | |
98b93ebb | 1053 | -ftree-vectorizer-verbose=<number> Set the verbosity level of the vectorizer |
459e8543 | 1054 | |
82a16202 | 1055 | ; -fverbose-asm causes extra commentary information to be produced in |
1056 | ; the generated assembly code (to make it more readable). This option | |
1057 | ; is generally only of use to those who actually need to read the | |
1058 | ; generated assembly code (perhaps while debugging the compiler itself). | |
1059 | ; -fno-verbose-asm, the default, causes the extra information | |
1060 | ; to not be added and is useful when comparing two assembler files. | |
ecdb6d1a | 1061 | fverbose-asm |
2e9da478 | 1062 | Common Report Var(flag_verbose_asm) |
72528c71 | 1063 | Add extra commentary to assembler output |
ecdb6d1a | 1064 | |
b212f378 | 1065 | fvisibility= |
1066 | Common Joined RejectNegative | |
1067 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility | |
1068 | ||
1069 | ||
1c6a7b8c | 1070 | fvpt |
2e9da478 | 1071 | Common Report Var(flag_value_profile_transformations) |
1c6a7b8c | 1072 | Use expression value profiles in optimizations |
1073 | ||
eeb4a70e | 1074 | fweb |
472cd78a | 1075 | Common Report Var(flag_web) Init(2) |
eeb4a70e | 1076 | Construct webs and split unrelated uses of single variable |
1077 | ||
62eec3b4 | 1078 | fwhole-program |
1079 | Common Report Var(flag_whole_program) Init(0) | |
1080 | Perform whole program optimizations | |
1081 | ||
ecdb6d1a | 1082 | fwrapv |
2e9da478 | 1083 | Common Report Var(flag_wrapv) |
72528c71 | 1084 | Assume signed arithmetic overflow wraps around |
ecdb6d1a | 1085 | |
ecdb6d1a | 1086 | fzero-initialized-in-bss |
2e9da478 | 1087 | Common Report Var(flag_zero_initialized_in_bss) Init(1) |
72528c71 | 1088 | Put zero initialized data in the bss section |
ecdb6d1a | 1089 | |
6f2f567f | 1090 | g |
1091 | Common JoinedOrMissing | |
b0e56fb1 | 1092 | Generate debug information in default format |
1093 | ||
1094 | gcoff | |
a1baa5f1 | 1095 | Common JoinedOrMissing Negative(gdwarf-2) |
b0e56fb1 | 1096 | Generate debug information in COFF format |
1097 | ||
b0e56fb1 | 1098 | gdwarf-2 |
a1baa5f1 | 1099 | Common JoinedOrMissing Negative(gstabs) |
b0e56fb1 | 1100 | Generate debug information in DWARF v2 format |
1101 | ||
1102 | ggdb | |
1103 | Common JoinedOrMissing | |
1104 | Generate debug information in default extended format | |
1105 | ||
1106 | gstabs | |
a1baa5f1 | 1107 | Common JoinedOrMissing Negative(gstabs+) |
b0e56fb1 | 1108 | Generate debug information in STABS format |
1109 | ||
1110 | gstabs+ | |
a1baa5f1 | 1111 | Common JoinedOrMissing Negative(gvms) |
b0e56fb1 | 1112 | Generate debug information in extended STABS format |
1113 | ||
1114 | gvms | |
a1baa5f1 | 1115 | Common JoinedOrMissing Negative(gxcoff) |
b0e56fb1 | 1116 | Generate debug information in VMS format |
1117 | ||
1118 | gxcoff | |
a1baa5f1 | 1119 | Common JoinedOrMissing Negative(gxcoff+) |
b0e56fb1 | 1120 | Generate debug information in XCOFF format |
1121 | ||
1122 | gxcoff+ | |
a1baa5f1 | 1123 | Common JoinedOrMissing Negative(gcoff) |
b0e56fb1 | 1124 | Generate debug information in extended XCOFF format |
6f2f567f | 1125 | |
e690b385 | 1126 | o |
1127 | Common Joined Separate | |
53b8e5c1 | 1128 | -o <file> Place output into <file> |
e690b385 | 1129 | |
1130 | p | |
2e9da478 | 1131 | Common Var(profile_flag) |
53b8e5c1 | 1132 | Enable function profiling |
e690b385 | 1133 | |
1134 | pedantic | |
2e9da478 | 1135 | Common Var(pedantic) |
53b8e5c1 | 1136 | Issue warnings needed for strict compliance to the standard |
e690b385 | 1137 | |
1138 | pedantic-errors | |
1139 | Common | |
53b8e5c1 | 1140 | Like -pedantic but issue them as errors |
e690b385 | 1141 | |
3272db82 | 1142 | quiet |
2e9da478 | 1143 | Common Var(quiet_flag) |
53b8e5c1 | 1144 | Do not display functions compiled or elapsed time |
3272db82 | 1145 | |
e690b385 | 1146 | version |
2e9da478 | 1147 | Common Var(version_flag) |
53b8e5c1 | 1148 | Display the compiler's version |
e690b385 | 1149 | |
1150 | w | |
2e9da478 | 1151 | Common Var(inhibit_warnings) |
53b8e5c1 | 1152 | Suppress warnings |
e690b385 | 1153 | |
3272db82 | 1154 | ; This comment is to ensure we retain the blank line above. |