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