X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fcommon.opt;h=ba5bb2977d415026372bd26e742f2c4c024b01d5;hb=0c573f984386af7be60890bd572fe1f94e919666;hp=77862f07e34e36d9006893f79d48e6bb4f5cc3ad;hpb=60cfcb79540b5415f1dd4860aa0c9cb3d006e429;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/common.opt b/gcc/common.opt index 77862f07e34..ba5bb2977d4 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 Free Software Foundation, Inc. +; Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc. ; ; This file is part of GCC. ; @@ -16,10 +16,10 @@ ; ; You should have received a copy of the GNU General Public License ; along with GCC; see the file COPYING. If not, write to the Free -; Software Foundation, 59 Temple Place - Suite 330, Boston, MA -; 02111-1307, USA. +; Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA +; 02110-1301, USA. -; See c.opt for a description of this file's format. +; See the GCC internals manual for a description of this file's format. ; Please try to keep this file in ASCII collating order. @@ -29,7 +29,7 @@ Display this information -param Common Separate ---param = Set paramter to value. See below for a complete list of parameters +--param = Set parameter to value. See below for a complete list of parameters -target-help Common @@ -57,6 +57,14 @@ Waggregate-return Common Var(warn_aggregate_return) Warn about returning structures, unions or arrays +Walways-true +Common Var(warn_always_true) +Warn about comparisons that always evaluate to true + +Wattributes +Common Var(warn_attributes) Init(1) +Warn about inappropriate attribute usage + Wcast-align Common Var(warn_cast_align) Warn about pointer casts which increase alignment @@ -73,6 +81,10 @@ Werror Common Var(warnings_are_errors) Treat all warnings as errors +Werror= +Common Joined +Treat specified warning as error + Wextra Common Print extra (possibly unwanted) warnings @@ -89,6 +101,10 @@ Wlarger-than- Common RejectNegative Joined UInteger -Wlarger-than- Warn if an object is larger than bytes +Wunsafe-loop-optimizations +Common Var(warn_unsafe_loop_optimizations) +Warn if the loop cannot be optimized due to nontrivial assumptions. + Wmissing-noreturn Common Var(warn_missing_noreturn) Warn about functions which might be candidates for __attribute__((noreturn)) @@ -105,6 +121,10 @@ Wshadow Common Var(warn_shadow) Warn when one local variable shadows another +Wstack-protector +Common Var(warn_stack_protect) +Warn when not issuing stack smashing protection for some reason + Wstrict-aliasing Common Warn about code which might break strict aliasing rules @@ -113,6 +133,10 @@ Wstrict-aliasing= Common Joined UInteger Warn about code which might break strict aliasing rules +Wstring-literal-comparison +Common Var(warn_string_literal_comparison) +Warn about comparisons to constant string literals + Wswitch Common Var(warn_switch) Warn about enumerated switches, with no default, missing a case @@ -161,6 +185,10 @@ Wunused-variable Common Var(warn_unused_variable) Warn when a variable is unused +Wvolatile-register-var +Common Var(warn_register_var) +Warn when a register variable is declared volatile + aux-info Common Separate -aux-info Emit declaration information into @@ -229,8 +257,9 @@ Common RejectNegative Joined UInteger ; 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. True in Fortran. -; The value is ignored if flag_alias_check is 0. +; 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) Specify that arguments may alias each other and globals @@ -243,6 +272,10 @@ fargument-noalias-global Common Report Var(flag_argument_noalias,2) VarExists Assume arguments alias neither each other nor globals +fargument-noalias-anything +Common Report Var(flag_argument_noalias,3) VarExists +Assume arguments alias no other storage + fasynchronous-unwind-tables Common Report Var(flag_asynchronous_unwind_tables) Generate unwind tables that are exact at each instruction boundary @@ -310,6 +343,10 @@ fcse-skip-blocks Common Report Var(flag_cse_skip_blocks) When running CSE, follow conditional jumps +fcx-limited-range +Common Report Var(flag_cx_limited_range) +Omit range reduction step when performing complex division + fdata-sections Common Report Var(flag_data_sections) Place data items into their own section @@ -332,6 +369,10 @@ fdiagnostics-show-location= 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 +Amend appropriate diagnostic messages with the command line option that controls them + fdump- Common Joined RejectNegative -fdump- Dump various compiler internals to a file @@ -340,6 +381,10 @@ fdump-unnumbered Common Report Var(flag_dump_unnumbered) VarExists Suppress output of instruction numbers and line number notes in debugging dumps +fearly-inlining +Common Report Var(flag_early_inlining) Init(1) +Perform early inlining + feliminate-dwarf2-dups Common Report Var(flag_eliminate_dwarf2_dups) Perform DWARF2 duplicate elimination @@ -352,6 +397,10 @@ feliminate-unused-debug-types Common Report Var(flag_eliminate_unused_debug_types) Init(1) Perform unused type elimination in debug info +femit-class-debug-always +Common Report Var(flag_emit_class_debug_always) Init(1) +Do not suppress C++ class debug information. + fexceptions Common Report Var(flag_exceptions) Enable exception handling @@ -407,18 +456,18 @@ Common Report Var(flag_gcse_lm) Init(1) Perform enhanced load motion during global common subexpression elimination fgcse-sm -Common Report Var(flag_gcse_sm) Init(1) +Common Report Var(flag_gcse_sm) Init(0) Perform store motion after global common subexpression elimination fgcse-las -Common Report Var(flag_gcse_las) Init(1) +Common Report Var(flag_gcse_las) Init(0) Perform redundant load after store elimination in global common subexpression elimination fgcse-after-reload Common Report Var(flag_gcse_after_reload) Perform global common subexpression elimination after register allocation -has finished. +has finished fguess-branch-probability Common Report Var(flag_guess_branch_prob) @@ -461,6 +510,10 @@ finline-functions Common Report Var(flag_inline_functions) Integrate simple functions into their callers +finline-functions-called-once +Common Report Var(flag_inline_functions_called_once) Init(1) +Integrate functions called once into their callers + finline-limit- Common RejectNegative Joined UInteger @@ -472,10 +525,34 @@ finstrument-functions Common Report Var(flag_instrument_function_entry_exit) Instrument function entry and exit with profiling calls +fipa-cp +Common Report Var(flag_ipa_cp) +Perform Interprocedural constant propagation + +fipa-pure-const +Common Report Var(flag_ipa_pure_const) Init(0) +Discover pure and const functions + +fipa-pta +Common Report Var(flag_ipa_pta) Init(0) +Perform interprocedural points-to analysis + +fipa-reference +Common Report Var(flag_ipa_reference) Init(0) +Discover readonly and non addressable static variables + +fipa-type-escape +Common Report Var(flag_ipa_type_escape) Init(0) +Type based escape and alias analysis + fivopts Common Report Var(flag_ivopts) Init(1) Optimize induction variables on trees +fjump-tables +Common Var(flag_jump_tables) Init(1) +Use jump tables for sufficiently large switch statements + fkeep-inline-functions Common Report Var(flag_keep_inline_functions) Generate code for functions even if they are fully inlined @@ -489,12 +566,8 @@ Common Report Var(flag_leading_underscore) Init(-1) Give external symbols a leading underscore floop-optimize -Common Report Var(flag_loop_optimize) -Perform loop optimizations - -floop-optimize2 -Common Report Var(flag_loop_optimize2) -Perform loop optimizations using the new loop optimizer +Common +Does nothing. Preserved for backward compatibility. fmath-errno Common Report Var(flag_errno_math) Init(1) @@ -523,29 +596,21 @@ fmodulo-sched Common Report Var(flag_modulo_sched) Perform SMS based modulo scheduling before the first scheduling pass -fmove-all-movables -Common Report Var(flag_move_all_movables) -Force all loop invariant computations out of loops - fmove-loop-invariants -Common Report Var(flag_move_loop_invariants) +Common Report Var(flag_move_loop_invariants) Init(1) Move loop invariant computations out of loops fmudflap Common RejectNegative Report Var(flag_mudflap) -Add mudflap bounds-checking instrumentation for single-threaded program. +Add mudflap bounds-checking instrumentation for single-threaded program fmudflapth Common RejectNegative Report Var(flag_mudflap_threads) -Add mudflap bounds-checking instrumentation for multi-threaded program. +Add mudflap bounds-checking instrumentation for multi-threaded program fmudflapir Common RejectNegative Report Var(flag_mudflap_ignore_reads) -Ignore read operations when inserting mudflap instrumentation. - -fnew-ra -Common Report Var(flag_new_regalloc) -Use graph-coloring register allocation +Ignore read operations when inserting mudflap instrumentation freschedule-modulo-scheduled-loops Common Report Var(flag_resched_modulo_sched) @@ -555,14 +620,6 @@ fnon-call-exceptions Common Report Var(flag_non_call_exceptions) Support synchronous non-call exceptions -fold-unroll-loops -Common Report Var(flag_old_unroll_loops) -Perform loop unrolling when iteration count is known - -fold-unroll-all-loops -Common Report Var(flag_old_unroll_all_loops) -Perform loop unrolling for all loops - fomit-frame-pointer Common Report Var(flag_omit_frame_pointer) When possible do not generate stack frames @@ -646,10 +703,6 @@ frandom-seed= Common Joined RejectNegative -frandom-seed= Make compile reproducible using -freduce-all-givs -Common Report Var(flag_reduce_all_givs) -Strength reduce all loop general induction variables - freg-struct-return Common Report Var(flag_pcc_struct_return,0) VarExists Return small aggregates in registers @@ -659,7 +712,7 @@ Common Report Var(flag_regmove) Enables a register move optimization frename-registers -Common Report Var(flag_rename_registers) +Common Report Var(flag_rename_registers) Init(2) Perform a register renaming optimization pass freorder-blocks @@ -675,12 +728,12 @@ Common Report Var(flag_reorder_functions) Reorder functions to improve code placement frerun-cse-after-loop -Common Report Var(flag_rerun_cse_after_loop) +Common Report Var(flag_rerun_cse_after_loop) Init(2) Add a common subexpression elimination pass after loop optimizations frerun-loop-opt -Common Report Var(flag_rerun_loop_opt) -Run the loop optimizer twice +Common +Does nothing. Preserved for backward compatibility. frounding-math Common Report Var(flag_rounding_math) @@ -730,7 +783,7 @@ Allow premature scheduling of queued insns fsched-stalled-insns= Common RejectNegative Joined UInteger --fsched-stalled-insns= Set number of queued insns that can be prematurely scheduled +-fsched-stalled-insns= Set number of queued insns that can be prematurely scheduled ; sched_stalled_insns_dep controls how many recently scheduled cycles will ; be examined for a dependency on a stalled insn that is candidate for @@ -742,11 +795,19 @@ Set dependence distance checking in premature scheduling of queued insns fsched-stalled-insns-dep= Common RejectNegative Joined UInteger --fsched-stalled-insns-dep= Set dependence distance checking in premature scheduling of queued insns +-fsched-stalled-insns-dep= Set dependence distance checking in premature scheduling of queued insns -fshared-data -Common Report Var(flag_shared_data) -Mark data as shared rather than private +fsection-anchors +Common Report Var(flag_section_anchors) +Access data in the same section from shared anchor points + +frtl-abstract-sequences +Common Report Var(flag_rtl_seqabstr) +Perform sequence abstraction optimization on RTL + +fshow-column +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) @@ -756,9 +817,13 @@ fsingle-precision-constant Common Report Var(flag_single_precision_constant) Convert floating point constants to single precision constants -fspeculative-prefetching -Common Report Var(flag_speculative_prefetching) -Use value profiling for speculative prefetching +fsplit-ivs-in-unroller +Common Report Var(flag_split_ivs_in_unroller) Init(1) +Split lifetimes of induction variables when loops are unrolled + +fvariable-expansion-in-unroller +Common Report Var(flag_variable_expansion_in_unroller) +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. @@ -777,9 +842,17 @@ fstack-limit-symbol= Common RejectNegative Joined -fstack-limit-symbol= Trap if the stack goes past symbol +fstack-protector +Common Report Var(flag_stack_protect, 1) +Use propolice as a stack protection method + +fstack-protector-all +Common Report RejectNegative Var(flag_stack_protect, 2) VarExists +Use a stack protection method for every function + fstrength-reduce -Common Report Var(flag_strength_reduce) -Perform strength reduction optimizations +Common +Does nothing. Preserved for backward compatibility. ; Nonzero if we should do (language-dependent) alias analysis. ; Typically, this analysis will assume that expressions of certain @@ -809,6 +882,10 @@ ftls-model= 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) +Reorder top level functions, variables, and asms + ftracer Common Report Var(flag_tracer) Perform superblock formation via tail duplication @@ -824,14 +901,14 @@ ftrapv Common Report Var(flag_trapv) Trap for signed overflow in addition, subtraction and multiplication -ftree-based-profiling -Common Report Var(flag_tree_based_profiling) -Use tree-ssa based implementation of profiling - ftree-ccp Common Report Var(flag_tree_ccp) Enable SSA-CCP optimization on trees +ftree-store-ccp +Common Report Var(flag_tree_store_ccp) +Enable SSA-CCP optimization for stores and loads + ftree-ch Common Report Var(flag_tree_ch) Enable loop header copying on trees @@ -842,7 +919,15 @@ Coalesce memory temporaries in the SSA->normal pass ftree-copyrename Common Report Var(flag_tree_copyrename) -Replace SSA temporaries with better names in copies. +Replace SSA temporaries with better names in copies + +ftree-copy-prop +Common Report Var(flag_tree_copy_prop) +Enable copy propagation on trees + +ftree-store-copy-prop +Common Report Var(flag_tree_store_copy_prop) +Enable copy propagation for stores and loads ftree-dce Common Report Var(flag_tree_dce) @@ -869,20 +954,25 @@ Common Report Var(flag_tree_loop_linear) Enable linear loop transforms on trees ftree-loop-ivcanon -Common Report Var(flag_tree_loop_ivcanon) +Common Report Var(flag_tree_loop_ivcanon) Init(1) Create canonical induction variables in loops ftree-loop-optimize Common Report Var(flag_tree_loop_optimize) Init(1) Enable loop optimizations on tree level -ftree-points-to= -Common Joined RejectNegative - ftree-pre Common Report Var(flag_tree_pre) Enable SSA-PRE optimization on trees +ftree-salias +Common Report Var(flag_tree_salias) +Perform structural alias analysis + +ftree-sink +Common Report Var(flag_tree_sink) +Enable SSA code sinking on trees + ftree-sra Common Report Var(flag_tree_sra) Perform scalar replacement of aggregates @@ -893,7 +983,11 @@ Replace temporary expressions in the SSA->normal pass ftree-lrs Common Report Var(flag_tree_live_range_split) -Perform live range splitting during the SSA->normal pass. +Perform live range splitting during the SSA->normal pass + +ftree-vrp +Common Report Var(flag_tree_vrp) Init(0) +Perform Value Range Propagation on trees funit-at-a-time Common Report Var(flag_unit_at_a_time) @@ -907,6 +1001,13 @@ funroll-all-loops Common Report Var(flag_unroll_all_loops) Perform loop unrolling for all loops +; Nonzero means that loop optimizer may assume that the induction variables +; that control loops do not overflow and that the loops with nontrivial +; exit condition are not infinite +funsafe-loop-optimizations +Common Report Var(flag_unsafe_loop_optimizations) +Allow loop optimizations to assume that the loops behave in normal way + ; Nonzero means that unsafe floating-point math optimizations are allowed ; for the sake of speed. IEEE compliance is not guaranteed, and operations ; are allowed to assume that their arguments and results are "normal" @@ -931,6 +1032,14 @@ ftree-vectorize Common Report Var(flag_tree_vectorize) Enable loop vectorization on trees +ftree-vect-loop-version +Common Report Var(flag_tree_vect_loop_version) Init(1) +Enable loop versioning when doing loop vectorization on trees + +ftree-vectorizer-verbose= +Common RejectNegative Joined +-ftree-vectorizer-verbose= Set the verbosity level of the vectorizer + ; -fverbose-asm causes extra commentary information to be produced in ; the generated assembly code (to make it more readable). This option ; is generally only of use to those who actually need to read the @@ -951,9 +1060,13 @@ Common Report Var(flag_value_profile_transformations) Use expression value profiles in optimizations fweb -Common Report Var(flag_web) VarExists +Common Report Var(flag_web) Init(2) Construct webs and split unrelated uses of single variable +fwhole-program +Common Report Var(flag_whole_program) Init(0) +Perform whole program optimizations + fwrapv Common Report Var(flag_wrapv) Assume signed arithmetic overflow wraps around @@ -998,9 +1111,6 @@ gxcoff+ Common JoinedOrMissing Generate debug information in extended XCOFF format -m -Common Joined - o Common Joined Separate -o Place output into