X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fcommon.opt;h=d5f00a0bd9ad6b81291be0d418b234a6016a7696;hb=c2f29260864f931025707bda198a4ead538cb49b;hp=4ffe1fd0518c562b37dba97e4e6ebc2b4481ffe8;hpb=14792f4e09135749d6631d113f0e73185ba50226;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/common.opt b/gcc/common.opt index 4ffe1fd0518..d5f00a0bd9a 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -1,6 +1,6 @@ ; Options for the language- and target-independent parts of the compiler. -; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 +; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 ; Free Software Foundation, Inc. ; ; This file is part of GCC. @@ -35,11 +35,11 @@ Common Report Joined Common Alias for --help=target -;; The following three entries are to work around the gcc driver +;; The following four entries are to work around the gcc driver ;; program's insatiable desire to turn options starting with a ;; double dash (--) into options starting with a dash f (-f). fhelp -Common +Common Var(help_flag) fhelp= Common Joined @@ -47,6 +47,9 @@ Common Joined ftarget-help Common +fversion +Common + -param Common Separate --param = Set parameter to value. See below for a complete list of parameters @@ -67,7 +70,7 @@ Common Optimization Optimize for space rather than speed W -Common RejectNegative +Common RejectNegative Var(extra_warnings) Warning This switch is deprecated; use -Wextra instead Waggregate-return @@ -86,6 +89,10 @@ Wcast-align Common Var(warn_cast_align) Warning Warn about pointer casts which increase alignment +Wcpp +Common Var(warn_cpp) Init(1) Warning +Warn when a #warning directive is encountered + Wdeprecated-declarations Common Var(warn_deprecated_decl) Init(1) Warning Warn about uses of __attribute__((deprecated)) declarations @@ -94,10 +101,6 @@ Wdisabled-optimization Common Var(warn_disabled_optimization) Warning Warn when an optimization pass is disabled -Wdisallowed-function-list= -Common RejectNegative Joined Warning -Warn on calls to these functions - Werror Common Var(warnings_are_errors) Treat all warnings as errors @@ -107,7 +110,7 @@ Common Joined Treat specified warning as error Wextra -Common Warning +Common Var(extra_warnings) Warning Print extra (possibly unwanted) warnings Wfatal-errors @@ -116,23 +119,19 @@ Exit on the first error occurred Wframe-larger-than= Common RejectNegative Joined UInteger --Wframe-larger-than= Warn if a function's stack frame requires more than bytes +-Wframe-larger-than= Warn if a function's stack frame requires more than bytes Winline Common Var(warn_inline) Warning Warn when an inlined function cannot be inlined Wlarger-than- -Common RejectNegative Joined UInteger Warning +Common RejectNegative Joined UInteger Warning Undocumented Wlarger-than= Common RejectNegative Joined UInteger Warning -Wlarger-than= Warn if an object is larger than bytes -Wlogical-op -Common Warning Var(warn_logical_op) -Warn when a logical operator is suspicously always evaluating to true or false - Wunsafe-loop-optimizations Common Var(warn_unsafe_loop_optimizations) Warning Warn if the loop cannot be optimized due to nontrivial assumptions. @@ -202,17 +201,25 @@ Common Var(warn_type_limits) Init(-1) Warning Warn if a comparison is always true or always false due to the limited range of the data type Wuninitialized -Common Var(warn_uninitialized) Warning +Common Var(warn_uninitialized) Init(-1) Warning Warn about uninitialized automatic variables Wunreachable-code -Common Var(warn_notreached) Warning -Warn about code that will never be executed +Common +Does nothing. Preserved for backward compatibility. Wunused Common Var(warn_unused) Init(0) Warning Enable all -Wunused- warnings +Wunused-but-set-parameter +Common Var(warn_unused_but_set_parameter) Init(-1) Warning +Warn when a function parameter is only set, otherwise unused + +Wunused-but-set-variable +Common Var(warn_unused_but_set_variable) Init(-1) Warning +Warn when a variable is only set, otherwise unused + Wunused-function Common Var(warn_unused_function) Init(-1) Warning Warn when a function is unused @@ -258,6 +265,10 @@ dumpbase Common Separate -dumpbase Set the file basename to be used for dumps +dumpdir +Common Separate +-dumpdir Set the directory name to be used for dumps + ; The version of the C++ ABI in use. The following values are allowed: ; ; 0: The version of the ABI believed most conformant with the C++ ABI @@ -267,7 +278,13 @@ Common Separate ; ; 1: The version of the ABI first used in G++ 3.2. ; -; 2: The version of the ABI first used in G++ 3.4. +; 2: The version of the ABI first used in G++ 3.4 (and current default). +; +; 3: The version of the ABI that fixes the missing underscore +; in template non-type arguments of pointer type. +; +; 4: The version of the ABI that introduces unambiguous mangling of +; vector types. ; ; Additional positive integers will be assigned as new versions of ; the ABI become the default version of the ABI. @@ -302,29 +319,21 @@ Align the start of loops falign-loops= Common RejectNegative Joined UInteger -; This flag is only tested if alias checking is enabled. -; 0 if pointer arguments may alias each other. True in C. -; 1 if pointer arguments may not alias each other but may alias -; global variables. -; 2 if pointer arguments may not alias each other and may not -; alias global variables. -; 3 if pointer arguments may not alias anything. True in Fortran. -; Set by the front end. fargument-alias -Common Report Var(flag_argument_noalias,0) Optimization -Specify that arguments may alias each other and globals +Common +Does nothing. Preserved for backward compatibility. fargument-noalias -Common Report Var(flag_argument_noalias,1) VarExists Optimization -Assume arguments may alias globals but not each other +Common +Does nothing. Preserved for backward compatibility. fargument-noalias-global -Common Report Var(flag_argument_noalias,2) VarExists Optimization -Assume arguments alias neither each other nor globals +Common +Does nothing. Preserved for backward compatibility. fargument-noalias-anything -Common Report Var(flag_argument_noalias,3) VarExists Optimization -Assume arguments alias no other storage +Common +Does nothing. Preserved for backward compatibility. fasynchronous-unwind-tables Common Report Var(flag_asynchronous_unwind_tables) Optimization @@ -385,8 +394,16 @@ fcommon Common Report Var(flag_no_common,0) Optimization Do not put uninitialized globals in the common section +fcompare-debug= +Common JoinedOrMissing RejectNegative Var(flag_compare_debug_opt) +-fcompare-debug[=] Compile with and without e.g. -gtoggle, and compare the final-insns dump + +fcompare-debug-second +Common RejectNegative Var(flag_compare_debug) +Run only the second compilation of -fcompare-debug + fconserve-stack -Common Var(flag_conserve_stack,0) Optimization +Common Var(flag_conserve_stack) Optimization Do not perform optimizations increasing noticeably stack usage fcprop-registers @@ -402,8 +419,8 @@ Common Report Var(flag_cse_follow_jumps) Optimization When running CSE, follow jumps to their targets fcse-skip-blocks -Common Report Var(flag_cse_skip_blocks) Optimization -When running CSE, follow conditional jumps +Common +Does nothing. Preserved for backward compatibility. fcx-limited-range Common Report Var(flag_cx_limited_range) Optimization @@ -423,7 +440,7 @@ List all available debugging counters with their limits and counts. fdbg-cnt= Common RejectNegative Joined --fdbg-cnt=:[,:,...] Set the debug counter limit. +-fdbg-cnt=:[,:,...] Set the debug counter limit. fdebug-prefix-map= Common Joined RejectNegative @@ -440,7 +457,7 @@ Common Report Var(flag_delayed_branch) Optimization Attempt to fill delay slots of branch instructions fdelete-null-pointer-checks -Common Report Var(flag_delete_null_pointer_checks) Optimization +Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization Delete useless null pointer checks fdiagnostics-show-location= @@ -455,6 +472,10 @@ fdump- Common Joined RejectNegative -fdump- Dump various compiler internals to a file +fdump-final-insns= +Common RejectNegative Joined Var(flag_dump_final_insns) +-fdump-final-insns=filename Dump to filename the insns at the end of translation + fdump-noaddr Common Report Var(flag_dump_noaddr) Suppress output of addresses in debugging dumps @@ -463,6 +484,10 @@ fdump-unnumbered Common Report Var(flag_dump_unnumbered) VarExists Suppress output of instruction numbers, line number notes and addresses in debugging dumps +fdump-unnumbered-links +Common Report Var(flag_dump_unnumbered_links) VarExists +Suppress output of previous and next insn numbers in debugging dumps + fdwarf2-cfi-asm Common Report Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE) Enable CFI tables via GAS assembler directives. @@ -475,6 +500,10 @@ feliminate-dwarf2-dups Common Report Var(flag_eliminate_dwarf2_dups) Perform DWARF2 duplicate elimination +fipa-sra +Common Report Var(flag_ipa_sra) Init(0) Optimization +Perform interprocedural reduction of aggregates + feliminate-unused-debug-symbols Common Report Var(flag_debug_only_used_symbols) Perform unused type elimination in debug info @@ -487,6 +516,10 @@ femit-class-debug-always Common Report Var(flag_emit_class_debug_always) Init(0) Do not suppress C++ class debug information. +fenable-icf-debug +Common Report Var(flag_enable_icf_debug) +Generate debug information to support Identical Code Folding (ICF) + fexceptions Common Report Var(flag_exceptions) Optimization Enable exception handling @@ -495,6 +528,10 @@ fexpensive-optimizations Common Report Var(flag_expensive_optimizations) Optimization Perform a number of minor, expensive optimizations +fexcess-precision= +Common Joined RejectNegative +-fexcess-precision=[fast|standard] Specify handling of excess floating-point precision + ffast-math Common @@ -551,10 +588,19 @@ Common Report Var(flag_gcse_after_reload) Optimization Perform global common subexpression elimination after register allocation has finished +; This option is not documented yet as its semantics will change. fgraphite Common Report Var(flag_graphite) Enable in and out of Graphite representation +fgraphite-identity +Common Report Var(flag_graphite_identity) Optimization +Enable Graphite Identity transformation + +floop-parallelize-all +Common Report Var(flag_loop_parallelize_all) Optimization +Mark all loops as parallel + floop-strip-mine Common Report Var(flag_loop_strip_mine) Optimization Enable Loop Strip Mining transformation @@ -567,10 +613,6 @@ floop-block Common Report Var(flag_loop_block) Optimization Enable Loop Blocking transformation -fgraphite-identity -Common Report Var(flag_graphite_identity) Optimization -Enable Graphite Identity transformation - fguess-branch-probability Common Report Var(flag_guess_branch_prob) Optimization Enable guessing of branch probabilities @@ -677,10 +719,6 @@ Common Report Var(flag_ipa_struct_reorg) Perform structure layout optimizations based on profiling information. -fira -Common Report Var(flag_ira) Init(0) -Use integrated register allocator. - fira-algorithm= Common Joined RejectNegative -fira-algorithm=[CB|priority] Set the used IRA algorithm @@ -693,6 +731,11 @@ fira-coalesce Common Report Var(flag_ira_coalesce) Init(0) Do optimistic coalescing. +fira-loop-pressure +Common Report Var(flag_ira_loop_pressure) +Use IRA based register pressure calculation +in RTL loop optimizations. + fira-share-save-slots Common Report Var(flag_ira_share_save_slots) Init(1) Share slots for saving different hard registers. @@ -703,7 +746,7 @@ Share stack slots for spilled pseudo-registers. fira-verbose= Common RejectNegative Joined UInteger --fira-verbose= Control IRA's level of diagnostic messages. +-fira-verbose= Control IRA's level of diagnostic messages. fivopts Common Report Var(flag_ivopts) Init(1) Optimization @@ -729,6 +772,19 @@ floop-optimize Common Does nothing. Preserved for backward compatibility. +flto +Common Var(flag_lto) +Enable link-time optimization. + +; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h. +flto-compression-level= +Common Joined UInteger Var(flag_lto_compression_level) Init(-1) +-flto-compression-level= Use zlib compression level for IL + +flto-report +Common Report Var(flag_lto_report) Init(0) Optimization +Report various link-time optimization statistics + fmath-errno Common Report Var(flag_errno_math) Init(1) Optimization Set errno after built-in math functions @@ -856,6 +912,14 @@ fpie Common Report Var(flag_pie,1) VarExists Generate position-independent code for executables if possible (small mode) +fplugin= +Common Joined RejectNegative +Specify a plugin to load + +fplugin-arg- +Common Joined RejectNegative +-fplugin-arg--[=] Specify argument = for plugin + fpredictive-commoning Common Report Var(flag_predictive_commoning) Optimization Run predictive commoning optimization. @@ -958,6 +1022,10 @@ fsched-interblock Common Report Var(flag_schedule_interblock) Init(1) Optimization Enable scheduling across basic blocks +fsched-pressure +Common Report Var(flag_sched_pressure) Init(0) Optimization +Enable register pressure sensitive insn scheduling + fsched-spec Common Report Var(flag_schedule_speculative) Init(1) Optimization Allow speculative motion of non-loads @@ -979,8 +1047,8 @@ Common Report Var(flag_sched2_use_superblocks) Optimization If scheduling post reload, do superblock scheduling fsched2-use-traces -Common Report Var(flag_sched2_use_traces) Optimization -If scheduling post reload, do trace scheduling +Common +Does nothing. Preserved for backward compatibility. fschedule-insns Common Report Var(flag_schedule_insns) Optimization @@ -1035,21 +1103,41 @@ fsched-stalled-insns-dep= Common RejectNegative Joined UInteger -fsched-stalled-insns-dep= Set dependence distance checking in premature scheduling of queued insns +fsched-group-heuristic +Common Report Var(flag_sched_group_heuristic) Init(1) Optimization +Enable the group heuristic in the scheduler + +fsched-critical-path-heuristic +Common Report Var(flag_sched_critical_path_heuristic) Init(1) Optimization +Enable the critical path heuristic in the scheduler + +fsched-spec-insn-heuristic +Common Report Var(flag_sched_spec_insn_heuristic) Init(1) Optimization +Enable the speculative instruction heuristic in the scheduler + +fsched-rank-heuristic +Common Report Var(flag_sched_rank_heuristic) Init(1) Optimization +Enable the rank heuristic in the scheduler + +fsched-last-insn-heuristic +Common Report Var(flag_sched_last_insn_heuristic) Init(1) Optimization +Enable the last instruction heuristic in the scheduler + +fsched-dep-count-heuristic +Common Report Var(flag_sched_dep_count_heuristic) Init(1) Optimization +Enable the dependent count heuristic in the scheduler + fsection-anchors Common Report Var(flag_section_anchors) Optimization Access data in the same section from shared anchor points -frtl-abstract-sequences -Common Report Var(flag_rtl_seqabstr) Optimization -Perform sequence abstraction optimization on RTL - fsee -Common Report Var(flag_see) Init(0) -Eliminate redundant sign extensions using LCM. +Common +Does nothing. Preserved for backward compatibility. fshow-column -Common C ObjC C++ ObjC++ Report Var(flag_show_column) Init(0) -Show column numbers in diagnostics, when available. Default off +Common C ObjC C++ ObjC++ Report Var(flag_show_column) Init(1) +Show column numbers in diagnostics, when available. Default on fsignaling-nans Common Report Var(flag_signaling_nans) Optimization @@ -1201,6 +1289,10 @@ ftree-dse Common Report Var(flag_tree_dse) Optimization Enable dead store elimination +ftree-forwprop +Common Report Var(flag_tree_forwprop) Init(1) Optimization +Enable forward propagation on trees + ftree-fre Common Report Var(flag_tree_fre) Optimization Enable Full Redundancy Elimination (FRE) on trees @@ -1229,10 +1321,18 @@ ftree-parallelize-loops= Common Report Joined UInteger Var(flag_tree_parallelize_loops) Init(1) Enable automatic parallelization of loops +ftree-phiprop +Common Report Var(flag_tree_phiprop) Init(1) Optimization +Enable hoisting loads from conditional pointers. + ftree-pre Common Report Var(flag_tree_pre) Optimization Enable SSA-PRE optimization on trees +ftree-pta +Common Report Var(flag_tree_pta) Init(1) Optimization +Perform function-local points-to analysis on trees. + ftree-reassoc Common Report Var(flag_tree_reassoc) Init(1) Optimization Enable reassociation on tree level @@ -1305,10 +1405,21 @@ funwind-tables Common Report Var(flag_unwind_tables) Optimization Just generate unwind tables for exception handling +fuse-linker-plugin +Common Undocumented + fvar-tracking Common Report Var(flag_var_tracking) VarExists Optimization Perform variable tracking +fvar-tracking-assignments +Common Report Var(flag_var_tracking_assignments) VarExists Optimization +Perform variable tracking by annotating assignments + +fvar-tracking-assignments-toggle +Common Report Var(flag_var_tracking_assignments_toggle) VarExists Optimization +Toggle -fvar-tracking-assignments + fvar-tracking-uninit Common Report Var(flag_var_tracking_uninit) Optimization Perform variable tracking and also tag variables that are uninitialized @@ -1317,6 +1428,10 @@ ftree-vectorize Common Report Var(flag_tree_vectorize) Optimization Enable loop vectorization on trees +ftree-slp-vectorize +Common Report Var(flag_tree_slp_vectorize) Init(2) Optimization +Enable basic block vectorization (SLP) on trees + fvect-cost-model Common Report Var(flag_vect_cost_model) Optimization Enable use of cost model in vectorization @@ -1356,6 +1471,10 @@ fweb Common Report Var(flag_web) Init(2) Optimization Construct webs and split unrelated uses of single variable +fwhopr +Common Var(flag_whopr) +Enable partitioned link-time optimization. + ftree-builtin-call-dce Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization Enable conditional dead code elimination for builtin calls @@ -1377,12 +1496,12 @@ Common JoinedOrMissing Generate debug information in default format gcoff -Common JoinedOrMissing Negative(gdwarf-2) +Common JoinedOrMissing Negative(gdwarf-) Generate debug information in COFF format -gdwarf-2 -Common JoinedOrMissing Negative(gstabs) -Generate debug information in DWARF v2 format +gdwarf- +Common Joined UInteger Var(dwarf_version) Init(2) Negative(gstabs) +Generate debug information in DWARF v2 (or later) format ggdb Common JoinedOrMissing @@ -1396,6 +1515,18 @@ gstabs+ Common JoinedOrMissing Negative(gvms) Generate debug information in extended STABS format +gno-strict-dwarf +Common RejectNegative Var(dwarf_strict,0) Init(-1) +Emit DWARF additions beyond selected version + +gstrict-dwarf +Common Report RejectNegative Var(dwarf_strict,1) VarExists +Don't emit DWARF additions beyond selected version + +gtoggle +Common Report Var(flag_gtoggle) +Toggle debug information generation + gvms Common JoinedOrMissing Negative(gxcoff) Generate debug information in VMS format