1 ; Options for the language- and target-independent parts of the compiler.
3 ; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
4 ; Free Software Foundation, Inc.
6 ; This file is part of GCC.
8 ; GCC is free software; you can redistribute it and/or modify it under
9 ; the terms of the GNU General Public License as published by the Free
10 ; Software Foundation; either version 3, or (at your option) any later
13 ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 ; WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 ; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 ; You should have received a copy of the GNU General Public License
19 ; along with GCC; see the file COPYING3. If not see
20 ; <http://www.gnu.org/licenses/>.
22 ; See the GCC internals manual (options.texi) for a description of this file's format.
24 ; Please try to keep this file in ASCII collating order.
35 ; 0 means straightforward implementation of complex divide acceptable.
36 ; 1 means wide ranges of inputs must work for complex divide.
37 ; 2 means C99-like requirements for complex multiply and divide.
39 int flag_complex_method = 1
41 ; Nonzero if subexpressions must be evaluated from left-to-right.
43 int flag_evaluation_order = 0
45 ; Set the default region and algorithm for the integrated register
49 enum ira_algorithm flag_ira_algorithm = IRA_ALGORITHM_CB
52 enum ira_region flag_ira_region = IRA_REGION_MIXED
54 ; Language specific warning pass for unused results.
56 bool flag_warn_unused_result = false
61 ; Floating-point contraction mode, fast by default.
63 enum fp_contract_mode flag_fp_contract_mode = FP_CONTRACT_FAST
65 ; The excess precision specified on the command line, or defaulted by
68 enum excess_precision flag_excess_precision_cmdline = EXCESS_PRECISION_DEFAULT
70 ; Nonzero if we should write GIMPLE bytecode for link-time optimization.
74 ; True to warn about any objects definitions whose size is larger
75 ; than N bytes. Also want about function definitions whose returned
76 ; values are larger than N bytes, where N is 'larger_than_size'.
81 HOST_WIDE_INT larger_than_size
83 ; True to warn about any function whose frame size is larger
86 bool warn_frame_larger_than
89 HOST_WIDE_INT frame_larger_than_size
91 ; Nonzero means we should be saving declaration info into a .X file.
93 int flag_gen_aux_info = 0
95 ; Nonzero if we are compiling code for a shared library, zero for
100 ; The default visibility for all symbols (unless overridden).
102 enum symbol_visibility default_visibility = VISIBILITY_DEFAULT
104 ; Set to the default thread-local storage (tls) model to use.
106 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC
118 Driver Alias(coverage)
124 Common Separate Alias(d)
127 Common Joined Alias(d)
130 Common Separate Alias(dumpbase)
133 Common Separate Alias(dumpdir)
136 Driver Separate Alias(e)
139 Driver Joined Alias(e)
142 Common Warning Alias(Wextra)
145 Driver Separate Alias(Xassembler)
148 Driver JoinedOrMissing Alias(Xassembler)
151 Driver Separate Alias(Xlinker)
154 Driver JoinedOrMissing Alias(Xlinker)
157 Driver Separate Alias(u)
160 Driver Joined Alias(u)
163 Common Driver Var(help_flag)
164 Display this information
167 Common Driver Report Joined
168 --help=<class> Display descriptions of a specific class of options. <class> is one or more of optimizers, target, warnings, undocumented, params
171 Driver Separate Alias(x)
174 Driver Joined Alias(x)
177 Driver Separate Alias(L)
180 Driver Joined Alias(L)
182 -no-canonical-prefixes
183 Driver Alias(no-canonical-prefixes)
185 -no-standard-libraries
186 Driver Alias(nostdlib)
195 Common Driver Separate Alias(o) MissingArgError(missing filename after %qs)
198 Common Driver Joined Alias(o) MissingArgError(missing filename after %qs)
201 Driver Alias(pass-exit-codes)
204 Common Alias(pedantic)
207 Common Alias(pedantic-errors)
216 Driver Separate Alias(B)
219 Driver JoinedOrMissing Alias(B)
225 Driver Separate Alias(print-file-name=)
228 Driver JoinedOrMissing Alias(print-file-name=)
230 -print-libgcc-file-name
231 Driver Alias(print-libgcc-file-name)
233 -print-multi-directory
234 Driver Alias(print-multi-directory)
237 Driver Alias(print-multi-lib)
239 -print-multi-os-directory
240 Driver Alias(print-multi-os-directory)
243 Driver Separate Alias(print-prog-name=)
246 Driver JoinedOrMissing Alias(print-prog-name=)
249 Driver Alias(print-search-dirs)
252 Driver Alias(print-sysroot)
254 -print-sysroot-headers-suffix
255 Driver Alias(print-sysroot-headers-suffix)
261 Driver Alias(save-temps)
267 Driver Separate Alias(specs=)
270 Driver Joined Alias(specs=)
276 Driver Alias(symbolic)
280 Alias for --help=target
288 ;; The driver used to convert options such as --help into forms such
289 ;; as -fhelp; the following four entries are for compatibility with
290 ;; any direct uses of those (undocumented) -f forms
292 Common Driver Alias(-help)
295 Common Driver Joined Alias(-help=)
298 Common Driver Alias(-target-help)
301 Common Driver Alias(-version)
305 --param <param>=<value> Set parameter <param> to value. See below for a complete list of parameters
308 Common Joined Alias(-param)
311 Driver Separate Alias(-sysroot=)
314 Driver JoinedOrMissing
320 Driver Joined Separate
326 Driver Joined Separate
329 Common JoinedOrMissing Optimization
330 -O<number> Set optimization level to <number>
334 Optimize for space rather than speed
338 Optimize for speed disregarding exact standards compliance
341 Driver Joined Separate
347 Driver Joined Separate
359 Common RejectNegative Warning Alias(Wextra)
360 This switch is deprecated; use -Wextra instead
363 Driver JoinedOrMissing
366 Driver JoinedOrMissing
369 Driver JoinedOrMissing
372 Common Var(warn_aggregate_return) Warning
373 Warn about returning structures, unions or arrays
376 Common Var(warn_array_bounds) Warning
377 Warn if an array is accessed out of bounds
380 Common Var(warn_attributes) Init(1) Warning
381 Warn about inappropriate attribute usage
384 Common Var(warn_cast_align) Warning
385 Warn about pointer casts which increase alignment
388 Common Var(warn_cpp) Init(1) Warning
389 Warn when a #warning directive is encountered
391 Wdeprecated-declarations
392 Common Var(warn_deprecated_decl) Init(1) Warning
393 Warn about uses of __attribute__((deprecated)) declarations
395 Wdisabled-optimization
396 Common Var(warn_disabled_optimization) Warning
397 Warn when an optimization pass is disabled
400 Common Var(warnings_are_errors)
401 Treat all warnings as errors
405 Treat specified warning as error
408 Common Var(extra_warnings) Warning
409 Print extra (possibly unwanted) warnings
412 Common Var(flag_fatal_errors)
413 Exit on the first error occurred
416 Common RejectNegative Joined UInteger
417 -Wframe-larger-than=<number> Warn if a function's stack frame requires more than <number> bytes
420 Common Var(warn_inline) Warning
421 Warn when an inlined function cannot be inlined
424 Common RejectNegative Joined Warning Undocumented Alias(Wlarger-than=)
427 Common RejectNegative Joined UInteger Warning
428 -Wlarger-than=<number> Warn if an object is larger than <number> bytes
430 Wunsafe-loop-optimizations
431 Common Var(warn_unsafe_loop_optimizations) Warning
432 Warn if the loop cannot be optimized due to nontrivial assumptions.
435 Common Var(warn_missing_noreturn) Warning
436 Warn about functions which might be candidates for __attribute__((noreturn))
439 Common Var(warn_mudflap) Init(1) Warning
440 Warn about constructs not instrumented by -fmudflap
443 Common Var(warn_overflow) Init(1) Warning
444 Warn about overflow in arithmetic expressions
447 Common Var(warn_packed) Warning
448 Warn when the packed attribute has no effect on struct layout
451 Common Var(warn_padded) Warning
452 Warn when padding is required to align structure members
455 Common Var(warn_shadow) Warning
456 Warn when one local variable shadows another
459 Common Var(warn_stack_protect) Warning
460 Warn when not issuing stack smashing protection for some reason
464 Warn about code which might break strict aliasing rules
467 Common Joined RejectNegative UInteger Var(warn_strict_aliasing) Init(-1) Warning
468 Warn about code which might break strict aliasing rules
472 Warn about optimizations that assume that signed overflow is undefined
475 Common Joined RejectNegative UInteger Var(warn_strict_overflow) Init(-1) Warning
476 Warn about optimizations that assume that signed overflow is undefined
478 Wsuggest-attribute=const
479 Common Var(warn_suggest_attribute_const) Warning
480 Warn about functions which might be candidates for __attribute__((const))
482 Wsuggest-attribute=pure
483 Common Var(warn_suggest_attribute_pure) Warning
484 Warn about functions which might be candidates for __attribute__((pure))
486 Wsuggest-attribute=noreturn
487 Common Var(warn_suggest_attribute_noreturn) Warning
488 Warn about functions which might be candidates for __attribute__((noreturn))
491 Common Var(warn_switch) Warning
492 Warn about enumerated switches, with no default, missing a case
495 Common Var(warn_switch_default) Warning
496 Warn about enumerated switches missing a \"default:\" statement
499 Common Var(warn_switch_enum) Warning
500 Warn about all enumerated switches missing a specific case
503 Common Var(warn_system_headers) Warning
504 Do not suppress warnings from system headers
507 Common Var(warn_trampolines) Warning
508 Warn whenever a trampoline is generated
511 Common Var(warn_type_limits) Init(-1) Warning
512 Warn if a comparison is always true or always false due to the limited range of the data type
515 Common Var(warn_uninitialized) Init(-1) Warning
516 Warn about uninitialized automatic variables
520 Does nothing. Preserved for backward compatibility.
523 Common Var(warn_unused) Init(0) Warning
524 Enable all -Wunused- warnings
526 Wunused-but-set-parameter
527 Common Var(warn_unused_but_set_parameter) Init(-1) Warning
528 Warn when a function parameter is only set, otherwise unused
530 Wunused-but-set-variable
531 Common Var(warn_unused_but_set_variable) Init(-1) Warning
532 Warn when a variable is only set, otherwise unused
535 Common Var(warn_unused_function) Init(-1) Warning
536 Warn when a function is unused
539 Common Var(warn_unused_label) Init(-1) Warning
540 Warn when a label is unused
543 Common Var(warn_unused_parameter) Init(-1) Warning
544 Warn when a function parameter is unused
547 Common Var(warn_unused_value) Init(-1) Warning
548 Warn when an expression value is unused
551 Common Var(warn_unused_variable) Init(-1) Warning
552 Warn when a variable is unused
555 Common Var(warn_coverage_mismatch) Init(1) Warning
556 Warn in case profiles in -fprofile-use do not match
568 Common Separate Var(aux_info_file_name)
569 -aux-info <file> Emit declaration information into <file>
572 Common Joined Alias(aux-info)
575 Common Separate RejectDriver Var(aux_base_name)
578 Common Separate RejectDriver
588 -d<letters> Enable dumps from specific passes of the compiler
591 Common Separate Var(dump_base_name)
592 -dumpbase <file> Set the file basename to be used for dumps
595 Common Separate Var(dump_dir_name)
596 -dumpdir <dir> Set the directory name to be used for dumps
608 Driver Joined Separate
610 ; The version of the C++ ABI in use. The following values are allowed:
612 ; 0: The version of the ABI believed most conformant with the C++ ABI
613 ; specification. This ABI may change as bugs are discovered and fixed.
614 ; Therefore, 0 will not necessarily indicate the same ABI in different
617 ; 1: The version of the ABI first used in G++ 3.2.
619 ; 2: The version of the ABI first used in G++ 3.4 (and current default).
621 ; 3: The version of the ABI that fixes the missing underscore
622 ; in template non-type arguments of pointer type.
624 ; 4: The version of the ABI that introduces unambiguous mangling of
627 ; Additional positive integers will be assigned as new versions of
628 ; the ABI become the default version of the ABI.
630 Common Joined RejectNegative UInteger Var(flag_abi_version) Init(2)
633 Common Report Var(align_functions,0) Optimization UInteger
634 Align the start of functions
637 Common RejectNegative Joined UInteger Var(align_functions)
640 Common Report Var(align_jumps,0) Optimization UInteger
641 Align labels which are only reached by jumping
644 Common RejectNegative Joined UInteger Var(align_jumps)
647 Common Report Var(align_labels,0) Optimization UInteger
651 Common RejectNegative Joined UInteger Var(align_labels)
654 Common Report Var(align_loops,0) Optimization UInteger
655 Align the start of loops
658 Common RejectNegative Joined UInteger Var(align_loops)
662 Does nothing. Preserved for backward compatibility.
666 Does nothing. Preserved for backward compatibility.
668 fargument-noalias-global
670 Does nothing. Preserved for backward compatibility.
672 fargument-noalias-anything
674 Does nothing. Preserved for backward compatibility.
676 fasynchronous-unwind-tables
677 Common Report Var(flag_asynchronous_unwind_tables) Optimization
678 Generate unwind tables that are exact at each instruction boundary
681 Common Report Var(flag_auto_inc_dec) Init(1)
682 Generate auto-inc/dec instructions
684 ; -fcheck-bounds causes gcc to generate array bounds checks.
685 ; For C, C++ and ObjC: defaults off.
686 ; For Java: defaults to on.
687 ; For Fortran: defaults to off.
689 Common Report Var(flag_bounds_check)
690 Generate code to check bounds before indexing arrays
693 Common Report Var(flag_branch_on_count_reg) Init(1) Optimization
694 Replace add, compare, branch with branch on count register
696 fbranch-probabilities
697 Common Report Var(flag_branch_probabilities) Optimization
698 Use profiling information for branch probabilities
700 fbranch-target-load-optimize
701 Common Report Var(flag_branch_target_load_optimize) Optimization
702 Perform branch target load optimization before prologue / epilogue threading
704 fbranch-target-load-optimize2
705 Common Report Var(flag_branch_target_load_optimize2) Optimization
706 Perform branch target load optimization after prologue / epilogue threading
709 Common Report Var(flag_btr_bb_exclusive) Optimization
710 Restrict target load migration not to re-use registers in any basic block
713 Common Joined RejectNegative
714 -fcall-saved-<register> Mark <register> as being preserved across functions
717 Common Joined RejectNegative
718 -fcall-used-<register> Mark <register> as being corrupted by function calls
720 ; Nonzero for -fcaller-saves: allocate values in regs that need to
721 ; be saved across function calls, if that produces overall better code.
722 ; Optional now, so people can test it.
724 Common Report Var(flag_caller_saves) Optimization
725 Save registers around function calls
728 Common Report Var(flag_check_data_deps)
729 Compare the results of several data dependence analyzers.
731 fcombine-stack-adjustments
732 Common Report Var(flag_combine_stack_adjustments) Optimization
733 Looks for opportunities to reduce stack adjustments and stack references.
736 Common Report Var(flag_no_common,0) Optimization
737 Do not put uninitialized globals in the common section
741 ; Converted by the driver to -fcompare-debug= options.
744 Common Driver JoinedOrMissing RejectNegative Var(flag_compare_debug_opt)
745 -fcompare-debug[=<opts>] Compile with and without e.g. -gtoggle, and compare the final-insns dump
747 fcompare-debug-second
748 Common Driver RejectNegative
749 Run only the second compilation of -fcompare-debug
752 Common Var(flag_conserve_stack) Optimization
753 Do not perform optimizations increasing noticeably stack usage
756 Common Report Var(flag_cprop_registers) Optimization
757 Perform a register copy-propagation optimization pass
760 Common Report Var(flag_crossjumping) Optimization
761 Perform cross-jumping optimization
764 Common Report Var(flag_cse_follow_jumps) Optimization
765 When running CSE, follow jumps to their targets
769 Does nothing. Preserved for backward compatibility.
772 Common Report Var(flag_cx_limited_range) Optimization
773 Omit range reduction step when performing complex division
776 Common Report Var(flag_cx_fortran_rules) Optimization
777 Complex multiplication and division follow Fortran rules
780 Common Report Var(flag_data_sections) Optimization
781 Place data items into their own section
785 List all available debugging counters with their limits and counts.
788 Common RejectNegative Joined
789 -fdbg-cnt=<counter>:<limit>[,<counter>:<limit>,...] Set the debug counter limit.
792 Common Joined RejectNegative
793 Map one directory name to another in debug information
795 ; Nonzero for -fdefer-pop: don't pop args after each function call
796 ; instead save them up to pop many calls' args with one insns.
798 Common Report Var(flag_defer_pop) Optimization
799 Defer popping functions args from stack until later
802 Common Report Var(flag_delayed_branch) Optimization
803 Attempt to fill delay slots of branch instructions
805 fdelete-null-pointer-checks
806 Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization
807 Delete useless null pointer checks
809 fdiagnostics-show-location=
810 Common Joined RejectNegative
811 -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics
813 fdiagnostics-show-option
814 Common Var(flag_diagnostics_show_option) Init(1)
815 Amend appropriate diagnostic messages with the command line option that controls them
818 Common Joined RejectNegative
819 -fdump-<type> Dump various compiler internals to a file
822 Driver RejectNegative
825 Common RejectNegative Joined Var(flag_dump_final_insns)
826 -fdump-final-insns=filename Dump to filename the insns at the end of translation
829 Common RejectNegative Joined Var(flag_dump_go_spec)
830 -fdump-go-spec=filename Write all declarations to file as Go code
833 Common Report Var(flag_dump_noaddr)
834 Suppress output of addresses in debugging dumps
837 Common Report Var(flag_dump_unnumbered)
838 Suppress output of instruction numbers, line number notes and addresses in debugging dumps
840 fdump-unnumbered-links
841 Common Report Var(flag_dump_unnumbered_links)
842 Suppress output of previous and next insn numbers in debugging dumps
845 Common Report Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE)
846 Enable CFI tables via GAS assembler directives.
849 Common Report Var(flag_early_inlining) Init(1) Optimization
850 Perform early inlining
852 feliminate-dwarf2-dups
853 Common Report Var(flag_eliminate_dwarf2_dups)
854 Perform DWARF2 duplicate elimination
857 Common Report Var(flag_ipa_sra) Init(0) Optimization
858 Perform interprocedural reduction of aggregates
860 feliminate-unused-debug-symbols
861 Common Report Var(flag_debug_only_used_symbols)
862 Perform unused type elimination in debug info
864 feliminate-unused-debug-types
865 Common Report Var(flag_eliminate_unused_debug_types) Init(1)
866 Perform unused type elimination in debug info
868 femit-class-debug-always
869 Common Report Var(flag_emit_class_debug_always) Init(0)
870 Do not suppress C++ class debug information.
873 Common Report Var(flag_enable_icf_debug)
874 Generate debug information to support Identical Code Folding (ICF)
877 Common Report Var(flag_exceptions) Optimization
878 Enable exception handling
880 fexpensive-optimizations
881 Common Report Var(flag_expensive_optimizations) Optimization
882 Perform a number of minor, expensive optimizations
885 Common Joined RejectNegative
886 -fexcess-precision=[fast|standard] Specify handling of excess floating-point precision
892 Common Report Var(flag_finite_math_only) Optimization
893 Assume no NaNs or infinities are generated
896 Common Joined RejectNegative
897 -ffixed-<register> Mark <register> as being unavailable to the compiler
900 Common Report Var(flag_float_store) Optimization
901 Don't allocate floats and doubles in extended-precision registers
905 Does nothing. Preserved for backward compatibility.
908 Common Report Var(flag_forward_propagate) Optimization
909 Perform a forward propagation pass on RTL
912 Common Joined RejectNegative
913 -ffp-contract=[off|on|fast] Perform floating-point expression contraction.
915 ; Nonzero means don't put addresses of constant functions in registers.
916 ; Used for compiling the Unix kernel, where strange substitutions are
917 ; done on the assembly output.
919 Common Report Var(flag_no_function_cse,0)
920 Allow function addresses to be held in registers
923 Common Report Var(flag_function_sections)
924 Place each function into its own section
927 Common Report Var(flag_gcse) Optimization
928 Perform global common subexpression elimination
931 Common Report Var(flag_gcse_lm) Init(1) Optimization
932 Perform enhanced load motion during global common subexpression elimination
935 Common Report Var(flag_gcse_sm) Init(0) Optimization
936 Perform store motion after global common subexpression elimination
939 Common Report Var(flag_gcse_las) Init(0) Optimization
940 Perform redundant load after store elimination in global common subexpression
944 Common Report Var(flag_gcse_after_reload) Optimization
945 Perform global common subexpression elimination after register allocation
948 ; This option is not documented yet as its semantics will change.
950 Common Report Var(flag_graphite)
951 Enable in and out of Graphite representation
954 Common Report Var(flag_graphite_identity) Optimization
955 Enable Graphite Identity transformation
957 floop-parallelize-all
958 Common Report Var(flag_loop_parallelize_all) Optimization
959 Mark all loops as parallel
962 Common Report Var(flag_loop_strip_mine) Optimization
963 Enable Loop Strip Mining transformation
966 Common Report Var(flag_loop_interchange) Optimization
967 Enable Loop Interchange transformation
970 Common Report Var(flag_loop_block) Optimization
971 Enable Loop Blocking transformation
974 Common Report Var(flag_loop_flatten) Optimization
975 Enable Loop Flattening transformation
977 fstrict-volatile-bitfields
978 Common Report Var(flag_strict_volatile_bitfields) Init(-1)
979 Force bitfield accesses to match their type width
981 fguess-branch-probability
982 Common Report Var(flag_guess_branch_prob) Optimization
983 Enable guessing of branch probabilities
985 ; Nonzero means ignore `#ident' directives. 0 means handle them.
986 ; Generate position-independent code for executables if possible
987 ; On SVR4 targets, it also controls whether or not to emit a
988 ; string identifying the compiler.
990 Common Report Var(flag_no_ident,0)
991 Process #ident directives
994 Common Report Var(flag_if_conversion) Optimization
995 Perform conversion of conditional jumps to branchless equivalents
998 Common Report Var(flag_if_conversion2) Optimization
999 Perform conversion of conditional jumps to conditional execution
1001 ftree-loop-if-convert
1002 Common Report Var(flag_tree_loop_if_convert) Init(-1) Optimization
1003 Convert conditional jumps in innermost loops to branchless equivalents
1005 ftree-loop-if-convert-stores
1006 Common Report Var(flag_tree_loop_if_convert_stores) Optimization
1007 Also if-convert conditional jumps containing memory writes
1009 ; -finhibit-size-directive inhibits output of .size for ELF.
1010 ; This is used only for compiling crtstuff.c,
1011 ; and it may be extended to other effects
1012 ; needed for crtstuff.c on other systems.
1013 finhibit-size-directive
1014 Common Report Var(flag_inhibit_size_directive)
1015 Do not generate .size directives
1018 Common Report Var(flag_indirect_inlining)
1019 Perform indirect inlining
1021 ; Nonzero means that functions declared `inline' will be treated
1022 ; as `static'. Prevents generation of zillions of copies of unused
1023 ; static inline functions; instead, `inlines' are written out
1024 ; only when actually used. Used in conjunction with -g. Also
1025 ; does the right thing with #pragma interface.
1027 Common Report Var(flag_no_inline,0) Init(0)
1028 Pay attention to the \"inline\" keyword
1030 finline-small-functions
1031 Common Report Var(flag_inline_small_functions) Optimization
1032 Integrate simple functions into their callers when code size is known to not growth
1035 Common Report Var(flag_inline_functions) Optimization
1036 Integrate simple functions into their callers
1038 finline-functions-called-once
1039 Common Report Var(flag_inline_functions_called_once) Init(1) Optimization
1040 Integrate functions called once into their callers
1043 Common RejectNegative Joined Alias(finline-limit=)
1046 Common RejectNegative Joined UInteger
1047 -finline-limit=<number> Limit the size of inlined functions to <number>
1049 finstrument-functions
1050 Common Report Var(flag_instrument_function_entry_exit)
1051 Instrument function entry and exit with profiling calls
1053 finstrument-functions-exclude-function-list=
1054 Common RejectNegative Joined
1055 -finstrument-functions-exclude-function-list=name,... Do not instrument listed functions
1057 finstrument-functions-exclude-file-list=
1058 Common RejectNegative Joined
1059 -finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files
1062 Common Report Var(flag_ipa_cp) Optimization
1063 Perform Interprocedural constant propagation
1066 Common Report Var(flag_ipa_cp_clone) Optimization
1067 Perform cloning to make Interprocedural constant propagation stronger
1070 Common Report Var(flag_ipa_profile) Init(0) Optimization
1071 Perform interprocedural profile propagation
1074 Common Report Var(flag_ipa_pta) Init(0) Optimization
1075 Perform interprocedural points-to analysis
1078 Common Report Var(flag_ipa_pure_const) Init(0) Optimization
1079 Discover pure and const functions
1082 Common Report Var(flag_ipa_reference) Init(0) Optimization
1083 Discover readonly and non addressable static variables
1086 Common Report Var(flag_ipa_matrix_reorg) Optimization
1087 Perform matrix layout flattening and transposing based
1088 on profiling information.
1091 Common Report Var(flag_ipa_struct_reorg)
1092 Perform structure layout optimizations based
1093 on profiling information.
1096 Common Joined RejectNegative
1097 -fira-algorithm=[CB|priority] Set the used IRA algorithm
1100 Common Joined RejectNegative
1101 -fira-region=[one|all|mixed] Set regions for IRA
1104 Common Report Var(flag_ira_loop_pressure)
1105 Use IRA based register pressure calculation
1106 in RTL loop optimizations.
1108 fira-share-save-slots
1109 Common Report Var(flag_ira_share_save_slots) Init(1)
1110 Share slots for saving different hard registers.
1112 fira-share-spill-slots
1113 Common Report Var(flag_ira_share_spill_slots) Init(1)
1114 Share stack slots for spilled pseudo-registers.
1117 Common RejectNegative Joined UInteger Var(flag_ira_verbose) Init(5)
1118 -fira-verbose=<number> Control IRA's level of diagnostic messages.
1121 Common Report Var(flag_ivopts) Init(1) Optimization
1122 Optimize induction variables on trees
1125 Common Var(flag_jump_tables) Init(1) Optimization
1126 Use jump tables for sufficiently large switch statements
1128 fkeep-inline-functions
1129 Common Report Var(flag_keep_inline_functions)
1130 Generate code for functions even if they are fully inlined
1133 Common Report Var(flag_keep_static_consts) Init(1)
1134 Emit static const variables even if they are not used
1137 Common Report Var(flag_leading_underscore) Init(-1)
1138 Give external symbols a leading underscore
1142 Does nothing. Preserved for backward compatibility.
1146 Enable link-time optimization.
1149 Common RejectNegative Joined Var(flag_lto)
1150 Link-time optimization with number of parallel jobs or jobserver.
1153 Common Var(flag_lto_partition_1to1)
1154 Partition functions and vars at linktime based on object files they originate from
1156 flto-partition=balanced
1157 Common Var(flag_lto_partition_balanced)
1158 Partition functions and vars at linktime into approximately same sized buckets
1161 Common Var(flag_lto_partition_none)
1162 Disable partioning and streaming
1164 ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h.
1165 flto-compression-level=
1166 Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1)
1167 -flto-compression-level=<number> Use zlib compression level <number> for IL
1170 Common Report Var(flag_lto_report) Init(0) Optimization
1171 Report various link-time optimization statistics
1174 Common Report Var(flag_errno_math) Init(1) Optimization
1175 Set errno after built-in math functions
1178 Common Joined RejectNegative UInteger Var(flag_max_errors)
1179 -fmax-errors=<number> Maximum number of errors to report
1182 Common Report Var(mem_report)
1183 Report on permanent memory allocation
1185 ; This will attempt to merge constant section constants, if 1 only
1186 ; string constants and constants from constant pool, if 2 also constant
1188 fmerge-all-constants
1189 Common Report Var(flag_merge_constants,2) Init(1) Optimization
1190 Attempt to merge identical constants and constant variables
1193 Common Report Var(flag_merge_constants,1) Optimization
1194 Attempt to merge identical constants across compilation units
1196 fmerge-debug-strings
1197 Common Report Var(flag_merge_debug_strings) Init(1)
1198 Attempt to merge identical debug strings across compilation units
1201 Common RejectNegative Joined UInteger
1202 -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping
1205 Common Report Var(flag_modulo_sched) Optimization
1206 Perform SMS based modulo scheduling before the first scheduling pass
1208 fmodulo-sched-allow-regmoves
1209 Common Report Var(flag_modulo_sched_allow_regmoves)
1210 Perform SMS based modulo scheduling with register moves allowed
1212 fmove-loop-invariants
1213 Common Report Var(flag_move_loop_invariants) Init(1) Optimization
1214 Move loop invariant computations out of loops
1217 Common RejectNegative Report Var(flag_mudflap)
1218 Add mudflap bounds-checking instrumentation for single-threaded program
1221 Common RejectNegative Report Var(flag_mudflap,2)
1222 Add mudflap bounds-checking instrumentation for multi-threaded program
1225 Common RejectNegative Report Var(flag_mudflap_ignore_reads)
1226 Ignore read operations when inserting mudflap instrumentation
1229 Common Var(flag_dce) Init(1) Optimization
1230 Use the RTL dead code elimination pass
1233 Common Var(flag_dse) Init(1) Optimization
1234 Use the RTL dead store elimination pass
1236 freschedule-modulo-scheduled-loops
1237 Common Report Var(flag_resched_modulo_sched) Optimization
1238 Enable/Disable the traditional scheduling in loops that already passed modulo scheduling
1240 fnon-call-exceptions
1241 Common Report Var(flag_non_call_exceptions) Optimization
1242 Support synchronous non-call exceptions
1245 Common Report Var(flag_omit_frame_pointer) Optimization
1246 When possible do not generate stack frames
1248 foptimize-register-move
1249 Common Report Var(flag_regmove) Optimization
1250 Do the full register move optimization pass
1252 foptimize-sibling-calls
1253 Common Report Var(flag_optimize_sibling_calls) Optimization
1254 Optimize sibling and tail recursive calls
1257 Common Report Var(flag_partial_inlining)
1258 Perform partial inlining
1261 Common Report Var(pre_ipa_mem_report)
1262 Report on memory allocation before interprocedural optimization
1264 fpost-ipa-mem-report
1265 Common Report Var(post_ipa_mem_report)
1266 Report on memory allocation before interprocedural optimization
1269 Common Report Var(flag_pack_struct) Optimization
1270 Pack structure members together without holes
1273 Common RejectNegative Joined UInteger Optimization
1274 -fpack-struct=<number> Set initial maximum structure member alignment
1277 Common Report Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN)
1278 Return small aggregates in memory, not registers
1281 Common Report Var(flag_peel_loops) Optimization
1282 Perform loop peeling
1285 Common Report Var(flag_no_peephole,0) Optimization
1286 Enable machine specific peephole optimizations
1289 Common Report Var(flag_peephole2) Optimization
1290 Enable an RTL peephole pass before sched2
1293 Common Report Var(flag_pic,2)
1294 Generate position-independent code if possible (large mode)
1297 Common Report Var(flag_pie,2)
1298 Generate position-independent code for executables if possible (large mode)
1301 Common Report Var(flag_pic,1)
1302 Generate position-independent code if possible (small mode)
1305 Common Report Var(flag_pie,1)
1306 Generate position-independent code for executables if possible (small mode)
1309 Common Joined RejectNegative
1310 Specify a plugin to load
1313 Common Joined RejectNegative
1314 -fplugin-arg-<name>-<key>[=<value>] Specify argument <key>=<value> for plugin <name>
1316 fpredictive-commoning
1317 Common Report Var(flag_predictive_commoning) Optimization
1318 Run predictive commoning optimization.
1320 fprefetch-loop-arrays
1321 Common Report Var(flag_prefetch_loop_arrays) Init(-1) Optimization
1322 Generate prefetch instructions, if available, for arrays in loops
1325 Common Report Var(profile_flag)
1326 Enable basic program profiling code
1329 Common Report Var(profile_arc_flag)
1330 Insert arc-based program profiling code
1333 Common Joined RejectNegative
1334 Set the top-level directory for storing the profile data.
1335 The default is 'pwd'.
1338 Common Report Var(flag_profile_correction)
1339 Enable correction of flow inconsistent profile data input
1343 Enable common options for generating profile info for profile feedback directed optimizations
1346 Common Joined RejectNegative
1347 Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir=
1350 Common Var(flag_profile_use)
1351 Enable common options for performing profile feedback directed optimizations
1354 Common Joined RejectNegative
1355 Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir=
1358 Common Report Var(flag_profile_values)
1359 Insert code to profile values of expressions
1365 Common Joined RejectNegative
1366 -frandom-seed=<string> Make compile reproducible using <string>
1368 ; This switch causes the command line that was used to create an
1369 ; object file to be recorded into the object file. The exact format
1370 ; of this recording is target and binary file format dependent.
1371 ; It is related to the -fverbose-asm switch, but that switch only
1372 ; records information in the assembler output file as comments, so
1373 ; they never reach the object file.
1374 frecord-gcc-switches
1375 Common Report Var(flag_record_gcc_switches)
1376 Record gcc command line switches in the object file.
1379 Common Report Var(flag_pcc_struct_return,0) Optimization
1380 Return small aggregates in registers
1383 Common Report Var(flag_regmove) Optimization
1384 Enables a register move optimization
1387 Common Report Var(flag_rename_registers) Init(2) Optimization
1388 Perform a register renaming optimization pass
1391 Common Report Var(flag_reorder_blocks) Optimization
1392 Reorder basic blocks to improve code placement
1394 freorder-blocks-and-partition
1395 Common Report Var(flag_reorder_blocks_and_partition) Optimization
1396 Reorder basic blocks and partition into hot and cold sections
1399 Common Report Var(flag_reorder_functions) Optimization
1400 Reorder functions to improve code placement
1402 frerun-cse-after-loop
1403 Common Report Var(flag_rerun_cse_after_loop) Optimization
1404 Add a common subexpression elimination pass after loop optimizations
1408 Does nothing. Preserved for backward compatibility.
1411 Common Report Var(flag_rounding_math) Optimization
1412 Disable optimizations that assume default FP rounding behavior
1415 Common Report Var(flag_schedule_interblock) Init(1) Optimization
1416 Enable scheduling across basic blocks
1419 Common Report Var(flag_sched_pressure) Init(0) Optimization
1420 Enable register pressure sensitive insn scheduling
1423 Common Report Var(flag_schedule_speculative) Init(1) Optimization
1424 Allow speculative motion of non-loads
1427 Common Report Var(flag_schedule_speculative_load) Optimization
1428 Allow speculative motion of some loads
1430 fsched-spec-load-dangerous
1431 Common Report Var(flag_schedule_speculative_load_dangerous) Optimization
1432 Allow speculative motion of more loads
1435 Common RejectNegative Joined
1436 -fsched-verbose=<number> Set the verbosity level of the scheduler
1438 fsched2-use-superblocks
1439 Common Report Var(flag_sched2_use_superblocks) Optimization
1440 If scheduling post reload, do superblock scheduling
1444 Does nothing. Preserved for backward compatibility.
1447 Common Report Var(flag_schedule_insns) Optimization
1448 Reschedule instructions before register allocation
1451 Common Report Var(flag_schedule_insns_after_reload) Optimization
1452 Reschedule instructions after register allocation
1454 ; This flag should be on when a target implements non-trivial
1455 ; scheduling hooks, maybe saving some information for its own sake.
1456 ; On IA64, for example, this is used for correct bundling.
1457 fselective-scheduling
1458 Common Report Var(flag_selective_scheduling) Optimization
1459 Schedule instructions using selective scheduling algorithm
1461 fselective-scheduling2
1462 Common Report Var(flag_selective_scheduling2) Optimization
1463 Run selective scheduling after reload
1465 fsel-sched-pipelining
1466 Common Report Var(flag_sel_sched_pipelining) Init(0) Optimization
1467 Perform software pipelining of inner loops during selective scheduling
1469 fsel-sched-pipelining-outer-loops
1470 Common Report Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization
1471 Perform software pipelining of outer loops during selective scheduling
1473 fsel-sched-reschedule-pipelined
1474 Common Report Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization
1475 Reschedule pipelined regions without pipelining
1477 ; sched_stalled_insns means that insns can be moved prematurely from the queue
1478 ; of stalled insns into the ready list.
1479 fsched-stalled-insns
1480 Common Report Var(flag_sched_stalled_insns) Optimization UInteger
1481 Allow premature scheduling of queued insns
1483 fsched-stalled-insns=
1484 Common RejectNegative Joined UInteger
1485 -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled
1487 ; sched_stalled_insns_dep controls how many recently scheduled cycles will
1488 ; be examined for a dependency on a stalled insn that is candidate for
1489 ; premature removal from the queue of stalled insns into the ready list (has
1490 ; an effect only if the flag 'sched_stalled_insns' is set).
1491 fsched-stalled-insns-dep
1492 Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger
1493 Set dependence distance checking in premature scheduling of queued insns
1495 fsched-stalled-insns-dep=
1496 Common RejectNegative Joined UInteger
1497 -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns
1499 fsched-group-heuristic
1500 Common Report Var(flag_sched_group_heuristic) Init(1) Optimization
1501 Enable the group heuristic in the scheduler
1503 fsched-critical-path-heuristic
1504 Common Report Var(flag_sched_critical_path_heuristic) Init(1) Optimization
1505 Enable the critical path heuristic in the scheduler
1507 fsched-spec-insn-heuristic
1508 Common Report Var(flag_sched_spec_insn_heuristic) Init(1) Optimization
1509 Enable the speculative instruction heuristic in the scheduler
1511 fsched-rank-heuristic
1512 Common Report Var(flag_sched_rank_heuristic) Init(1) Optimization
1513 Enable the rank heuristic in the scheduler
1515 fsched-last-insn-heuristic
1516 Common Report Var(flag_sched_last_insn_heuristic) Init(1) Optimization
1517 Enable the last instruction heuristic in the scheduler
1519 fsched-dep-count-heuristic
1520 Common Report Var(flag_sched_dep_count_heuristic) Init(1) Optimization
1521 Enable the dependent count heuristic in the scheduler
1524 Common Report Var(flag_section_anchors) Optimization
1525 Access data in the same section from shared anchor points
1529 Does nothing. Preserved for backward compatibility.
1532 Common Report Var(flag_zee) Init(0)
1533 Eliminate redundant zero extensions on targets that support implicit extensions.
1536 Common Report Var(flag_show_column) Init(1)
1537 Show column numbers in diagnostics, when available. Default on
1540 Common Report Var(flag_signaling_nans) Optimization
1541 Disable optimizations observable by IEEE signaling NaNs
1544 Common Report Var(flag_signed_zeros) Init(1) Optimization
1545 Disable floating point optimizations that ignore the IEEE signedness of zero
1547 fsingle-precision-constant
1548 Common Report Var(flag_single_precision_constant) Optimization
1549 Convert floating point constants to single precision constants
1551 fsplit-ivs-in-unroller
1552 Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization
1553 Split lifetimes of induction variables when loops are unrolled
1556 Common Report Var(flag_split_stack) Init(-1)
1557 Generate discontiguous stack frames
1560 Common Report Var(flag_split_wide_types) Optimization
1561 Split wide types into independent registers
1563 fvariable-expansion-in-unroller
1564 Common Report Var(flag_variable_expansion_in_unroller) Optimization
1565 Apply variable expansion when loops are unrolled
1568 Common Report RejectNegative Joined
1569 -fstack-check=[no|generic|specific] Insert stack checking code into the program
1572 Common Alias(fstack-check=, specific, no)
1573 Insert stack checking code into the program. Same as -fstack-check=specific
1578 fstack-limit-register=
1579 Common RejectNegative Joined
1580 -fstack-limit-register=<register> Trap if the stack goes past <register>
1582 fstack-limit-symbol=
1583 Common RejectNegative Joined
1584 -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name>
1587 Common Report Var(flag_stack_protect, 1)
1588 Use propolice as a stack protection method
1590 fstack-protector-all
1591 Common Report RejectNegative Var(flag_stack_protect, 2)
1592 Use a stack protection method for every function
1595 Common RejectNegative Var(flag_stack_usage)
1596 Output stack usage information on a per-function basis
1600 Does nothing. Preserved for backward compatibility.
1602 ; Nonzero if we should do (language-dependent) alias analysis.
1603 ; Typically, this analysis will assume that expressions of certain
1604 ; types do not alias expressions of certain other types. Only used
1605 ; if alias analysis (in general) is enabled.
1607 Common Report Var(flag_strict_aliasing) Optimization
1608 Assume strict aliasing rules apply
1611 Common Report Var(flag_strict_overflow)
1612 Treat signed overflow as undefined
1615 Common Report Var(flag_syntax_only)
1616 Check for syntax errors, then stop
1619 Common Report Var(flag_test_coverage)
1620 Create data files needed by \"gcov\"
1623 Common Report Var(flag_thread_jumps) Optimization
1624 Perform jump threading optimizations
1627 Common Report Var(time_report)
1628 Report the time taken by each compiler pass
1631 Common Joined RejectNegative
1632 -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model
1635 Common Report Var(flag_toplevel_reorder) Init(2) Optimization
1636 Reorder top level functions, variables, and asms
1639 Common Report Var(flag_tracer)
1640 Perform superblock formation via tail duplication
1642 ; Zero means that floating-point math operations cannot generate a
1643 ; (user-visible) trap. This is the case, for example, in nonstop
1644 ; IEEE 754 arithmetic.
1646 Common Report Var(flag_trapping_math) Init(1) Optimization
1647 Assume floating-point operations can trap
1650 Common Report Var(flag_trapv) Optimization
1651 Trap for signed overflow in addition, subtraction and multiplication
1654 Common Report Var(flag_tree_ccp) Optimization
1655 Enable SSA-CCP optimization on trees
1658 Common Report Var(flag_tree_bit_ccp) Optimization
1659 Enable SSA-BIT-CCP optimization on trees
1663 Does nothing. Preserved for backward compatibility.
1666 Common Report Var(flag_tree_ch) Optimization
1667 Enable loop header copying on trees
1670 Common Report Var(flag_tree_copyrename) Optimization
1671 Replace SSA temporaries with better names in copies
1674 Common Report Var(flag_tree_copy_prop) Optimization
1675 Enable copy propagation on trees
1677 ftree-store-copy-prop
1679 Does nothing. Preserved for backward compatibility.
1682 Common Report Var(flag_tree_cselim) Init(2) Optimization
1683 Transform condition stores into unconditional ones
1685 ftree-switch-conversion
1686 Common Report Var(flag_tree_switch_conversion) Optimization
1687 Perform conversions of switch initializations.
1690 Common Report Var(flag_tree_dce) Optimization
1691 Enable SSA dead code elimination optimization on trees
1693 ftree-dominator-opts
1694 Common Report Var(flag_tree_dom) Optimization
1695 Enable dominator optimizations
1698 Common Report Var(flag_tree_dse) Optimization
1699 Enable dead store elimination
1702 Common Report Var(flag_tree_forwprop) Init(1) Optimization
1703 Enable forward propagation on trees
1706 Common Report Var(flag_tree_fre) Optimization
1707 Enable Full Redundancy Elimination (FRE) on trees
1709 ftree-loop-distribution
1710 Common Report Var(flag_tree_loop_distribution) Optimization
1711 Enable loop distribution on trees
1713 ftree-loop-distribute-patterns
1714 Common Report Var(flag_tree_loop_distribute_patterns) Optimization
1715 Enable loop distribution for patterns transformed into a library call
1718 Common Report Var(flag_tree_loop_im) Init(1) Optimization
1719 Enable loop invariant motion on trees
1722 Common Report Var(flag_tree_loop_linear) Optimization
1723 Enable linear loop transforms on trees
1726 Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization
1727 Create canonical induction variables in loops
1730 Common Report Var(flag_tree_loop_optimize) Init(1) Optimization
1731 Enable loop optimizations on tree level
1733 ftree-parallelize-loops=
1734 Common Report Joined RejectNegative UInteger Var(flag_tree_parallelize_loops) Init(1)
1735 Enable automatic parallelization of loops
1738 Common Report Var(flag_tree_phiprop) Init(1) Optimization
1739 Enable hoisting loads from conditional pointers.
1742 Common Report Var(flag_tree_pre) Optimization
1743 Enable SSA-PRE optimization on trees
1746 Common Report Var(flag_tree_pta) Init(1) Optimization
1747 Perform function-local points-to analysis on trees.
1750 Common Report Var(flag_tree_reassoc) Init(1) Optimization
1751 Enable reassociation on tree level
1755 Does nothing. Preserved for backward compatibility.
1758 Common Report Var(flag_tree_sink) Optimization
1759 Enable SSA code sinking on trees
1762 Common Report Var(flag_tree_sra) Optimization
1763 Perform scalar replacement of aggregates
1766 Common Report Var(flag_tree_ter) Optimization
1767 Replace temporary expressions in the SSA->normal pass
1770 Common Report Var(flag_tree_live_range_split) Optimization
1771 Perform live range splitting during the SSA->normal pass
1774 Common Report Var(flag_tree_vrp) Init(0) Optimization
1775 Perform Value Range Propagation on trees
1778 Common Report Var(flag_unit_at_a_time) Init(1) Optimization
1779 Compile whole compilation unit at a time
1782 Common Report Var(flag_unroll_loops) Optimization
1783 Perform loop unrolling when iteration count is known
1786 Common Report Var(flag_unroll_all_loops) Optimization
1787 Perform loop unrolling for all loops
1789 ; Nonzero means that loop optimizer may assume that the induction variables
1790 ; that control loops do not overflow and that the loops with nontrivial
1791 ; exit condition are not infinite
1792 funsafe-loop-optimizations
1793 Common Report Var(flag_unsafe_loop_optimizations) Optimization
1794 Allow loop optimizations to assume that the loops behave in normal way
1797 Common Report Var(flag_associative_math)
1798 Allow optimization for floating-point arithmetic which may change the
1799 result of the operation due to rounding.
1802 Common Report Var(flag_reciprocal_math)
1803 Same as -fassociative-math for expressions which include division.
1805 ; Nonzero means that unsafe floating-point math optimizations are allowed
1806 ; for the sake of speed. IEEE compliance is not guaranteed, and operations
1807 ; are allowed to assume that their arguments and results are "normal"
1808 ; (e.g., nonnegative for SQRT).
1809 funsafe-math-optimizations
1810 Common Report Var(flag_unsafe_math_optimizations) Optimization
1811 Allow math optimizations that may violate IEEE or ISO standards
1814 Common Report Var(flag_unswitch_loops) Optimization
1815 Perform loop unswitching
1818 Common Report Var(flag_unwind_tables) Optimization
1819 Just generate unwind tables for exception handling
1824 ; Positive if we should track variables, negative if we should run
1825 ; the var-tracking pass only to discard debug annotations, zero if
1826 ; we're not to run it. When flag_var_tracking == 2 (AUTODETECT_VALUE) it
1827 ; will be set according to optimize, debug_info_level and debug_hooks
1828 ; in process_options ().
1830 Common Report Var(flag_var_tracking) Init(2) Optimization
1831 Perform variable tracking
1833 ; Positive if we should track variables at assignments, negative if
1834 ; we should run the var-tracking pass only to discard debug
1835 ; annotations. When flag_var_tracking_assignments ==
1836 ; AUTODETECT_VALUE it will be set according to flag_var_tracking.
1837 fvar-tracking-assignments
1838 Common Report Var(flag_var_tracking_assignments) Init(2) Optimization
1839 Perform variable tracking by annotating assignments
1841 ; Nonzero if we should toggle flag_var_tracking_assignments after
1842 ; processing options and computing its default. */
1843 fvar-tracking-assignments-toggle
1844 Common Report Var(flag_var_tracking_assignments_toggle) Optimization
1845 Toggle -fvar-tracking-assignments
1847 fvar-tracking-uninit
1848 Common Report Var(flag_var_tracking_uninit) Optimization
1849 Perform variable tracking and also tag variables that are uninitialized
1852 Common Report Var(flag_tree_vectorize) Optimization
1853 Enable loop vectorization on trees
1856 Common Report Var(flag_tree_slp_vectorize) Init(2) Optimization
1857 Enable basic block vectorization (SLP) on trees
1860 Common Report Var(flag_vect_cost_model) Optimization
1861 Enable use of cost model in vectorization
1863 ftree-vect-loop-version
1864 Common Report Var(flag_tree_vect_loop_version) Init(1) Optimization
1865 Enable loop versioning when doing loop vectorization on trees
1867 ftree-vectorizer-verbose=
1868 Common RejectNegative Joined
1869 -ftree-vectorizer-verbose=<number> Set the verbosity level of the vectorizer
1872 Common Report Var(flag_tree_scev_cprop) Init(1) Optimization
1873 Enable copy propagation of scalar-evolution information.
1875 ; -fverbose-asm causes extra commentary information to be produced in
1876 ; the generated assembly code (to make it more readable). This option
1877 ; is generally only of use to those who actually need to read the
1878 ; generated assembly code (perhaps while debugging the compiler itself).
1879 ; -fno-verbose-asm, the default, causes the extra information
1880 ; to not be added and is useful when comparing two assembler files.
1882 Common Report Var(flag_verbose_asm)
1883 Add extra commentary to assembler output
1886 Common Joined RejectNegative
1887 -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility
1891 Common Report Var(flag_value_profile_transformations) Optimization
1892 Use expression value profiles in optimizations
1895 Common Report Var(flag_web) Init(2) Optimization
1896 Construct webs and split unrelated uses of single variable
1898 ftree-builtin-call-dce
1899 Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization
1900 Enable conditional dead code elimination for builtin calls
1903 Common Report Var(flag_whole_program) Init(0) Optimization
1904 Perform whole program optimizations
1907 Common Report Var(flag_wrapv) Optimization
1908 Assume signed arithmetic overflow wraps around
1910 fzero-initialized-in-bss
1911 Common Report Var(flag_zero_initialized_in_bss) Init(1)
1912 Put zero initialized data in the bss section
1915 Common JoinedOrMissing
1916 Generate debug information in default format
1919 Common JoinedOrMissing Negative(gdwarf-)
1920 Generate debug information in COFF format
1923 Common Joined UInteger Var(dwarf_version) Init(2) Negative(gstabs)
1924 Generate debug information in DWARF v2 (or later) format
1927 Common JoinedOrMissing
1928 Generate debug information in default extended format
1931 Common JoinedOrMissing Negative(gstabs+)
1932 Generate debug information in STABS format
1935 Common JoinedOrMissing Negative(gvms)
1936 Generate debug information in extended STABS format
1939 Common RejectNegative Var(dwarf_strict,0) Init(-1)
1940 Emit DWARF additions beyond selected version
1943 Common Report RejectNegative Var(dwarf_strict,1)
1944 Don't emit DWARF additions beyond selected version
1947 Common Report Var(flag_gtoggle)
1948 Toggle debug information generation
1951 Common JoinedOrMissing Negative(gxcoff)
1952 Generate debug information in VMS format
1955 Common JoinedOrMissing Negative(gxcoff+)
1956 Generate debug information in XCOFF format
1959 Common JoinedOrMissing Negative(gcoff)
1960 Generate debug information in extended XCOFF format
1963 Driver Joined Separate
1966 Common Joined Var(plugindir_string) Init(0)
1967 -iplugindir=<dir> Set <dir> to be the default plugin directory
1970 Driver Joined Separate
1972 no-canonical-prefixes
1982 Common Driver Joined Separate Var(asm_file_name) MissingArgError(missing filename after %qs)
1983 -o <file> Place output into <file>
1986 Common Var(profile_flag)
1987 Enable function profiling
1990 Driver Var(pass_exit_codes)
1993 Common Var(pedantic)
1994 Issue warnings needed for strict compliance to the standard
1997 Common Var(flag_pedantic_errors)
1998 Like -pedantic but issue them as errors
2004 Driver Var(use_pipes)
2007 Driver JoinedOrMissing Var(print_file_name)
2009 print-libgcc-file-name
2012 print-multi-directory
2013 Driver Var(print_multi_directory)
2016 Driver Var(print_multi_lib)
2018 print-multi-os-directory
2019 Driver Var(print_multi_os_directory)
2022 Driver JoinedOrMissing Var(print_prog_name)
2025 Driver Var(print_search_dirs)
2028 Driver Var(print_sysroot)
2030 print-sysroot-headers-suffix
2031 Driver Var(print_sysroot_headers_suffix)
2034 Common Var(quiet_flag) RejectDriver
2035 Do not display functions compiled or elapsed time
2044 Driver Var(report_times)
2047 Driver JoinedOrMissing
2050 Driver Joined Separate
2054 ; C option, but driver must not handle as "-u ndef".
2057 Common Driver Var(verbose_flag)
2058 Enable verbose output
2061 Common Var(version_flag) RejectDriver
2062 Display the compiler's version
2065 Common Var(inhibit_warnings)
2069 Driver Separate Var(wrapper_string)
2072 Driver Joined Separate
2075 Common RejectNegative Negative(pie)
2076 Create a shared library
2082 Driver Separate Alias(specs=)
2095 ; Documented for Fortran, but always accepted by driver.
2104 Common RejectNegative Negative(shared)
2105 Create a position independent executable
2108 Driver Joined Separate
2110 ; This comment is to ensure we retain the blank line above.