X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;ds=sidebyside;f=gcc%2Fcommon.opt;h=6e369e551020c67e33929bcafcc36c9031883900;hb=80cab0198cf6d526d37791e84f96796c3b942ebb;hp=b2c66433f562783df6997829cde268df0115a22a;hpb=61207d43e04032185fef000bb9e590d28759c9e9;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/common.opt b/gcc/common.opt index b2c66433f56..6e369e55102 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 @@ -94,10 +97,6 @@ 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 +106,7 @@ Common Joined Treat specified warning as error Wextra -Common Warning +Common Var(extra_warnings) Warning Print extra (possibly unwanted) warnings Wfatal-errors @@ -116,7 +115,7 @@ 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 @@ -129,10 +128,6 @@ 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. @@ -202,12 +197,12 @@ 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 @@ -258,6 +253,10 @@ 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 @@ -385,6 +384,18 @@ 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) 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 @@ -398,8 +409,8 @@ 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 @@ -419,7 +430,7 @@ 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 @@ -436,7 +447,7 @@ 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= @@ -451,6 +462,10 @@ 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 @@ -459,6 +474,10 @@ 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. @@ -471,6 +490,10 @@ 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 @@ -483,6 +506,10 @@ 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 @@ -491,6 +518,10 @@ 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 @@ -547,6 +578,31 @@ 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 + +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 + fguess-branch-probability Common Report Var(flag_guess_branch_prob) Optimization Enable guessing of branch probabilities @@ -653,18 +709,23 @@ 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=[regional|CB|mixed] Set the used IRA algorithm +-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-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. @@ -675,7 +736,7 @@ 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 @@ -701,6 +762,19 @@ 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 @@ -828,6 +902,14 @@ 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. @@ -930,6 +1012,10 @@ 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 @@ -962,6 +1048,29 @@ 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 @@ -984,21 +1093,41 @@ 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 @@ -1150,6 +1279,10 @@ 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 @@ -1178,10 +1311,18 @@ 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 @@ -1254,10 +1395,21 @@ 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 @@ -1266,6 +1418,10 @@ 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 @@ -1305,6 +1461,10 @@ 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 @@ -1326,12 +1486,12 @@ 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 @@ -1345,6 +1505,18 @@ 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