X-Git-Url: http://git.sourceforge.jp/view?p=pf3gnuchains%2Fgcc-fork.git;a=blobdiff_plain;f=gcc%2Fcommon.opt;h=e62e3d583a09051b8a1d9d8a0c26c731dc65313f;hp=ada94e95a18f087acfc75e75903e1f954d7023f1;hb=b7e3aeb1d14c179214a5509ae0b031dd725c377d;hpb=4d56938604b6c93387385b82ab359421996d9097 diff --git a/gcc/common.opt b/gcc/common.opt index ada94e95a18..e62e3d583a0 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, 2009 +; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 ; Free Software Foundation, Inc. ; ; This file is part of GCC. @@ -89,6 +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 @@ -115,14 +119,14 @@ 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 @@ -176,6 +180,14 @@ Wstrict-overflow= Common Joined UInteger Var(warn_strict_overflow) Init(-1) Warning Warn about optimizations that assume that signed overflow is undefined +Wsuggest-attribute=const +Common Var(warn_suggest_attribute_const) Warning +Warn about functions which might be candidates for __attribute__((const)) + +Wsuggest-attribute=pure +Common Var(warn_suggest_attribute_pure) Warning +Warn about functions which might be candidates for __attribute__((pure)) + Wswitch Common Var(warn_switch) Warning Warn about enumerated switches, with no default, missing a case @@ -201,13 +213,21 @@ 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 @@ -253,6 +273,10 @@ 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 @@ -262,7 +286,13 @@ 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. @@ -297,29 +327,21 @@ 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 @@ -380,18 +402,18 @@ fcommon Common Report Var(flag_no_common,0) Optimization Do not put uninitialized globals in the common section -fconserve-stack -Common Var(flag_conserve_stack) Optimization -Do not perform optimizations increasing noticeably stack usage - 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[=] 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) Optimization +Do not perform optimizations increasing noticeably stack usage + fcprop-registers Common Report Var(flag_cprop_registers) Optimization Perform a register copy-propagation optimization pass @@ -426,7 +448,7 @@ 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 @@ -451,7 +473,7 @@ Common Joined RejectNegative -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics fdiagnostics-show-option -Common +Common Var(flag_diagnostics_show_option) Init(1) Amend appropriate diagnostic messages with the command line option that controls them fdump- @@ -470,14 +492,14 @@ fdump-unnumbered Common Report Var(flag_dump_unnumbered) VarExists Suppress output of instruction numbers, line number notes and addresses 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. - 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. + fearly-inlining Common Report Var(flag_early_inlining) Init(1) Optimization Perform early inlining @@ -486,6 +508,10 @@ 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 @@ -498,6 +524,10 @@ 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 @@ -571,6 +601,14 @@ 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 @@ -583,11 +621,6 @@ floop-block Common Report Var(flag_loop_block) Optimization Enable Loop Blocking transformation -; This option is not documented as it does not perform any useful optimization. -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 @@ -668,14 +701,18 @@ fipa-cp-clone Common Report Var(flag_ipa_cp_clone) Optimization Perform cloning to make Interprocedural constant propagation stronger -fipa-pure-const -Common Report Var(flag_ipa_pure_const) Init(0) Optimization -Discover pure and const functions +fipa-profile +Common Report Var(flag_ipa_profile) Init(0) Optimization +Perform interprocedural profile propagation fipa-pta Common Report Var(flag_ipa_pta) Init(0) Optimization Perform interprocedural points-to analysis +fipa-pure-const +Common Report Var(flag_ipa_pure_const) Init(0) Optimization +Discover pure and const functions + fipa-reference Common Report Var(flag_ipa_reference) Init(0) Optimization Discover readonly and non addressable static variables @@ -706,6 +743,11 @@ 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. @@ -716,7 +758,7 @@ 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 @@ -742,6 +784,19 @@ 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 @@ -875,7 +930,7 @@ Specify a plugin to load fplugin-arg- Common Joined RejectNegative --fplugin-arg--[=] Specify argument = for plugin +-fplugin-arg--[=] Specify argument = for plugin fpredictive-commoning Common Report Var(flag_predictive_commoning) Optimization @@ -979,6 +1034,10 @@ 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 @@ -1000,8 +1059,8 @@ 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 @@ -1068,10 +1127,6 @@ fsched-spec-insn-heuristic Common Report Var(flag_sched_spec_insn_heuristic) Init(1) Optimization Enable the speculative instruction heuristic in the scheduler -fsched-reg-pressure-heuristic -Common Report Var(flag_sched_reg_pressure_heuristic) Init(1) Optimization -Enable the register pressure heuristic in the scheduler - fsched-rank-heuristic Common Report Var(flag_sched_rank_heuristic) Init(1) Optimization Enable the rank heuristic in the scheduler @@ -1362,10 +1417,21 @@ 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 @@ -1417,6 +1483,10 @@ 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 @@ -1457,6 +1527,14 @@ 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 @@ -1473,6 +1551,10 @@ gxcoff+ Common JoinedOrMissing Negative(gcoff) Generate debug information in extended XCOFF format +iplugindir= +Common Joined Var(plugindir_string) Init(0) +-iplugindir= Set to be the default plugin directory + o Common Joined Separate -o Place output into