X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fcommon.opt;h=c0f6b9e6d09faf928378ae37b1e7d5a9ca4f25c5;hb=7fc1e5fb14010db60715fda1fdd30a3d975614fc;hp=0efce3f739e529a88793d8188686dbc3b110cd8a;hpb=578ef7233480f2d3c762b176d186a752cc85f0df;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/common.opt b/gcc/common.opt index 0efce3f739e..c0f6b9e6d09 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -1,6 +1,7 @@ ; Options for the language- and target-independent parts of the compiler. -; Copyright (C) 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. +; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 +; Free Software Foundation, Inc. ; ; This file is part of GCC. ; @@ -34,11 +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 @@ -46,6 +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 @@ -58,11 +62,11 @@ Common Joined Separate UInteger -G Put global and static data smaller than bytes into a special section (on some targets) O -Common JoinedOrMissing +Common JoinedOrMissing Optimization -O Set optimization level to Os -Common +Common Optimization Optimize for space rather than speed W @@ -109,17 +113,20 @@ Wfatal-errors Common Var(flag_fatal_errors) 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 + Winline Common Var(warn_inline) Warning Warn when an inlined function cannot be inlined 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 +Wlarger-than= +Common RejectNegative Joined UInteger Warning +-Wlarger-than= Warn if an object is larger than bytes Wunsafe-loop-optimizations Common Var(warn_unsafe_loop_optimizations) Warning @@ -129,6 +136,10 @@ Wmissing-noreturn Common Var(warn_missing_noreturn) Warning Warn about functions which might be candidates for __attribute__((noreturn)) +Wmudflap +Common Var(warn_mudflap) Init(1) Warning +Warn about constructs not instrumented by -fmudflap + Woverflow Common Var(warn_overflow) Init(1) Warning Warn about overflow in arithmetic expressions @@ -154,7 +165,7 @@ Common Warning Warn about code which might break strict aliasing rules Wstrict-aliasing= -Common Joined UInteger Warning +Common Joined UInteger Var(warn_strict_aliasing) Init(-1) Warning Warn about code which might break strict aliasing rules Wstrict-overflow @@ -162,7 +173,7 @@ Common Warning Warn about optimizations that assume that signed overflow is undefined Wstrict-overflow= -Common Joined UInteger Warning +Common Joined UInteger Var(warn_strict_overflow) Init(-1) Warning Warn about optimizations that assume that signed overflow is undefined Wswitch @@ -181,6 +192,10 @@ Wsystem-headers Common Var(warn_system_headers) Warning Do not suppress warnings from system headers +Wtype-limits +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 Warn about uninitialized automatic variables @@ -190,33 +205,29 @@ Common Var(warn_notreached) Warning Warn about code that will never be executed Wunused -Common Warning +Common Var(warn_unused) Init(0) Warning Enable all -Wunused- warnings Wunused-function -Common Var(warn_unused_function) Warning +Common Var(warn_unused_function) Init(-1) Warning Warn when a function is unused Wunused-label -Common Var(warn_unused_label) Warning +Common Var(warn_unused_label) Init(-1) Warning Warn when a label is unused Wunused-parameter -Common Var(warn_unused_parameter) Warning +Common Var(warn_unused_parameter) Init(-1) Warning Warn when a function parameter is unused Wunused-value -Common Var(warn_unused_value) Warning +Common Var(warn_unused_value) Init(-1) Warning Warn when an expression value is unused Wunused-variable -Common Var(warn_unused_variable) Warning +Common Var(warn_unused_variable) Init(-1) Warning Warn when a variable is unused -Wvolatile-register-var -Common Var(warn_register_var) Warning -Warn when a register variable is declared volatile - Wcoverage-mismatch Common RejectNegative Var(warn_coverage_mismatch) Warning Warn instead of error in case profiles in -fprofile-use do not match @@ -259,28 +270,28 @@ fabi-version= Common Joined UInteger Var(flag_abi_version) Init(2) falign-functions -Common Report Var(align_functions,0) +Common Report Var(align_functions,0) Optimization UInteger Align the start of functions falign-functions= Common RejectNegative Joined UInteger falign-jumps -Common Report Var(align_jumps,0) Optimization +Common Report Var(align_jumps,0) Optimization UInteger Align labels which are only reached by jumping falign-jumps= Common RejectNegative Joined UInteger falign-labels -Common Report Var(align_labels,0) Optimization +Common Report Var(align_labels,0) Optimization UInteger Align all labels falign-labels= Common RejectNegative Joined UInteger falign-loops -Common Report Var(align_loops) Optimization +Common Report Var(align_loops) Optimization UInteger Align the start of loops falign-loops= @@ -369,6 +380,10 @@ 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 + fcprop-registers Common Report Var(flag_cprop_registers) Optimization Perform a register copy-propagation optimization pass @@ -389,6 +404,10 @@ fcx-limited-range Common Report Var(flag_cx_limited_range) Optimization Omit range reduction step when performing complex division +fcx-fortran-rules +Common Report Var(flag_cx_fortran_rules) Optimization +Complex multiplication and division follow Fortran rules + fdata-sections Common Report Var(flag_data_sections) Optimization Place data items into their own section @@ -416,7 +435,7 @@ 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= @@ -439,6 +458,10 @@ 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. + fearly-inlining Common Report Var(flag_early_inlining) Init(1) Optimization Perform early inlining @@ -467,6 +490,10 @@ 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 @@ -482,11 +509,9 @@ ffloat-store Common Report Var(flag_float_store) Optimization Don't allocate floats and doubles in extended-precision registers -; Nonzero for -fforce-addr: load memory address into a register before -; reference to memory. This makes better cse but slower compilation. fforce-addr -Common Report Var(flag_force_addr) Optimization -Copy memory address constants into registers before use +Common +Does nothing. Preserved for backward compatibility. fforward-propagate Common Report Var(flag_forward_propagate) Optimization @@ -525,6 +550,28 @@ 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 + +floop-strip-mine +Common Report Var(flag_loop_strip_mine) Optimization +Enable Loop Strip Mining transformation + +floop-interchange +Common Report Var(flag_loop_interchange) Optimization +Enable Loop Interchange transformation + +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 @@ -553,13 +600,17 @@ finhibit-size-directive Common Report Var(flag_inhibit_size_directive) Do not generate .size directives +findirect-inlining +Common Report Var(flag_indirect_inlining) +Perform indirect inlining + ; Nonzero means that functions declared `inline' will be treated ; as `static'. Prevents generation of zillions of copies of unused ; static inline functions; instead, `inlines' are written out ; only when actually used. Used in conjunction with -g. Also ; does the right thing with #pragma interface. finline -Common Report Var(flag_no_inline,0) Init(2) +Common Report Var(flag_no_inline,0) Init(0) Pay attention to the \"inline\" keyword finline-small-functions @@ -597,6 +648,10 @@ fipa-cp Common Report Var(flag_ipa_cp) Optimization Perform Interprocedural constant propagation +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 @@ -623,6 +678,30 @@ Common Report Var(flag_ipa_struct_reorg) Perform structure layout optimizations based on profiling information. +fira-algorithm= +Common Joined RejectNegative +-fira-algorithm=[CB|priority] Set the used IRA algorithm + +fira-region= +Common Joined RejectNegative +-fira-region=[one|all|mixed] Set regions for IRA + +fira-coalesce +Common Report Var(flag_ira_coalesce) Init(0) +Do optimistic coalescing. + +fira-share-save-slots +Common Report Var(flag_ira_share_save_slots) Init(1) +Share slots for saving different hard registers. + +fira-share-spill-slots +Common Report Var(flag_ira_share_spill_slots) Init(1) +Share stack slots for spilled pseudo-registers. + +fira-verbose= +Common RejectNegative Joined UInteger +-fira-verbose= Control IRA's level of diagnostic messages. + fivopts Common Report Var(flag_ivopts) Init(1) Optimization Optimize induction variables on trees @@ -648,7 +727,7 @@ Common Does nothing. Preserved for backward compatibility. fmath-errno -Common Report Var(flag_errno_math) Init(1) +Common Report Var(flag_errno_math) Init(1) Optimization Set errno after built-in math functions fmem-report @@ -666,6 +745,10 @@ fmerge-constants Common Report Var(flag_merge_constants,1) VarExists Optimization Attempt to merge identical constants across compilation units +fmerge-debug-strings +Common Report Var(flag_merge_debug_strings) Init(1) +Attempt to merge identical debug strings across compilation units + fmessage-length= Common RejectNegative Joined UInteger -fmessage-length= Limit diagnostics to characters per line. 0 suppresses line-wrapping @@ -714,10 +797,6 @@ fomit-frame-pointer Common Report Var(flag_omit_frame_pointer) Optimization When possible do not generate stack frames -fopenmp-ssa -Common Report Var(flag_openmp_ssa) -Expand OpenMP operations on SSA form - foptimize-register-move Common Report Var(flag_regmove) Optimization Do the full register move optimization pass @@ -774,6 +853,14 @@ 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. @@ -790,14 +877,31 @@ fprofile-arcs Common Report Var(profile_arc_flag) Insert arc-based program profiling code +fprofile-dir= +Common Joined RejectNegative +Set the top-level directory for storing the profile data. +The default is 'pwd'. + +fprofile-correction +Common Report Var(flag_profile_correction) +Enable correction of flow inconsistent profile data input + fprofile-generate Common Enable common options for generating profile info for profile feedback directed optimizations +fprofile-generate= +Common Joined RejectNegative +Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir= + fprofile-use -Common +Common Var(flag_profile_use) Enable common options for performing profile feedback directed optimizations +fprofile-use= +Common Joined RejectNegative +Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir= + fprofile-values Common Report Var(flag_profile_values) Insert code to profile values of expressions @@ -891,10 +995,33 @@ fschedule-insns2 Common Report Var(flag_schedule_insns_after_reload) Optimization Reschedule instructions after register allocation +; This flag should be on when a target implements non-trivial +; scheduling hooks, maybe saving some information for its own sake. +; On IA64, for example, this is used for correct bundling. +fselective-scheduling +Common Report Var(flag_selective_scheduling) Optimization +Schedule instructions using selective scheduling algorithm + +fselective-scheduling2 +Common Report Var(flag_selective_scheduling2) Optimization +Run selective scheduling after reload + +fsel-sched-pipelining +Common Report Var(flag_sel_sched_pipelining) Init(0) Optimization +Perform software pipelining of inner loops during selective scheduling + +fsel-sched-pipelining-outer-loops +Common Report Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization +Perform software pipelining of outer loops during selective scheduling + +fsel-sched-reschedule-pipelined +Common Report Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization +Reschedule pipelined regions without pipelining + ; sched_stalled_insns means that insns can be moved prematurely from the queue ; of stalled insns into the ready list. fsched-stalled-insns -Common Report Var(flag_sched_stalled_insns) Optimization +Common Report Var(flag_sched_stalled_insns) Optimization UInteger Allow premature scheduling of queued insns fsched-stalled-insns= @@ -906,7 +1033,7 @@ Common RejectNegative Joined UInteger ; premature removal from the queue of stalled insns into the ready list (has ; an effect only if the flag 'sched_stalled_insns' is set). fsched-stalled-insns-dep -Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization +Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger Set dependence distance checking in premature scheduling of queued insns fsched-stalled-insns-dep= @@ -917,10 +1044,6 @@ 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. @@ -953,11 +1076,13 @@ fvariable-expansion-in-unroller Common Report Var(flag_variable_expansion_in_unroller) Optimization Apply variable expansion when loops are unrolled -; Emit code to probe the stack, to help detect stack overflow; also -; may cause large objects to be allocated dynamically. +fstack-check= +Common Report RejectNegative Joined +-fstack-check=[no|generic|specific] Insert stack checking code into the program + fstack-check -Common Report Var(flag_stack_check) -Insert stack checking code into the program +Common Report +Insert stack checking code into the program. Same as -fstack-check=specific fstack-limit Common @@ -1015,7 +1140,7 @@ Common Joined RejectNegative -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model ftoplevel-reorder -Common Report Var(flag_toplevel_reorder) Init(1) Optimization +Common Report Var(flag_toplevel_reorder) Init(2) Optimization Reorder top level functions, variables, and asms ftracer @@ -1038,8 +1163,8 @@ Common Report Var(flag_tree_ccp) Optimization Enable SSA-CCP optimization on trees ftree-store-ccp -Common Report Var(flag_tree_store_ccp) Optimization -Enable SSA-CCP optimization for stores and loads +Common +Does nothing. Preserved for backward compatibility. ftree-ch Common Report Var(flag_tree_ch) Optimization @@ -1061,6 +1186,10 @@ ftree-cselim Common Report Var(flag_tree_cselim) Init(2) Optimization Transform condition stores into unconditional ones +ftree-switch-conversion +Common Report Var(flag_tree_switch_conversion) Optimization +Perform conversions of switch initializations. + ftree-dce Common Report Var(flag_tree_dce) Optimization Enable SSA dead code elimination optimization on trees @@ -1077,6 +1206,10 @@ ftree-fre Common Report Var(flag_tree_fre) Optimization Enable Full Redundancy Elimination (FRE) on trees +ftree-loop-distribution +Common Report Var(flag_tree_loop_distribution) Optimization +Enable loop distribution on trees + ftree-loop-im Common Report Var(flag_tree_loop_im) Init(1) Optimization Enable loop invariant motion on trees @@ -1106,8 +1239,8 @@ Common Report Var(flag_tree_reassoc) Init(1) Optimization Enable reassociation on tree level ftree-salias -Common Report Var(flag_tree_salias) Optimization -Perform structural alias analysis +Common +Does nothing. Preserved for backward compatibility. ftree-sink Common Report Var(flag_tree_sink) Optimization @@ -1118,7 +1251,7 @@ Common Report Var(flag_tree_sra) Optimization Perform scalar replacement of aggregates ftree-ter -Common Report Var(flag_tree_ter) Optimization +Common Report Var(flag_tree_ter) Init(1) Optimization Replace temporary expressions in the SSA->normal pass ftree-lrs @@ -1130,7 +1263,7 @@ Common Report Var(flag_tree_vrp) Init(0) Optimization Perform Value Range Propagation on trees funit-at-a-time -Common Report Var(flag_unit_at_a_time) Optimization +Common Report Var(flag_unit_at_a_time) Init(1) Optimization Compile whole compilation unit at a time funroll-loops @@ -1224,6 +1357,10 @@ fweb Common Report Var(flag_web) Init(2) Optimization Construct webs and split unrelated uses of single variable +ftree-builtin-call-dce +Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization +Enable conditional dead code elimination for builtin calls + fwhole-program Common Report Var(flag_whole_program) Init(0) Optimization Perform whole program optimizations