@xref{Overall Options,,Options Controlling the Kind of Output}.
@gccoptlist{
-c -S -E -o @var{file} -pipe -pass-exit-codes -x @var{language} @gol
--v -### --target-help --help}
+-v -### --help --target-help --version}
@item C Language Options
@xref{C Dialect Options,,Options Controlling C Dialect}.
-Wno-import -Wnonnull -Wpacked -Wpadded @gol
-Wparentheses -Wpointer-arith -Wredundant-decls @gol
-Wreturn-type -Wsequence-point -Wshadow @gol
--Wsign-compare -Wstrict-aliasing -Wswitch -Wswitch-default -Wswitch-enum @gol
+-Wsign-compare -Wstrict-aliasing @gol
+-Wswitch -Wswitch-default -Wswitch-enum @gol
-Wsystem-headers -Wtrigraphs -Wundef -Wuninitialized @gol
-Wunknown-pragmas -Wunreachable-code @gol
-Wunused -Wunused-function -Wunused-label -Wunused-parameter @gol
@item C-only Warning Options
@gccoptlist{
--Wbad-function-cast -Wmissing-declarations -Wmissing-prototypes @gol
--Wnested-externs -Wstrict-prototypes -Wtraditional}
+-Wbad-function-cast -Wmissing-declarations @gol
+-Wmissing-prototypes -Wnested-externs @gol
+-Wstrict-prototypes -Wtraditional}
@item Debugging Options
@xref{Debugging Options,,Options for Debugging Your Program or GCC}.
-fdump-class-hierarchy@r{[}-@var{n}@r{]} @gol
-fdump-tree-original@r{[}-@var{n}@r{]} -fdump-tree-optimized@r{[}-@var{n}@r{]} @gol
-fdump-tree-inlined@r{[}-@var{n}@r{]} @gol
--fmem-report @gol
--fprofile-arcs -ftest-coverage -ftime-report @gol
+-feliminate-dwarf2-dups -fmem-report @gol
+-fprofile-arcs -fsched-verbose=@var{n} @gol
+-ftest-coverage -ftime-report @gol
-g -g@var{level} -gcoff -gdwarf -gdwarf-1 -gdwarf-1+ -gdwarf-2 @gol
-ggdb -gstabs -gstabs+ -gvms -gxcoff -gxcoff+ @gol
-p -pg -print-file-name=@var{library} -print-libgcc-file-name @gol
@gccoptlist{
-falign-functions=@var{n} -falign-jumps=@var{n} @gol
-falign-labels=@var{n} -falign-loops=@var{n} @gol
+-fbounds-check @gol
-fbranch-probabilities -fcaller-saves -fcprop-registers @gol
-fcse-follow-jumps -fcse-skip-blocks -fdata-sections @gol
-fdelayed-branch -fdelete-null-pointer-checks @gol
-fif-conversion -fif-conversion2 @gol
-finline-functions -finline-limit=@var{n} -fkeep-inline-functions @gol
-fkeep-static-consts -fmerge-constants -fmerge-all-constants @gol
--fmove-all-movables -fnew-ra -fno-default-inline @gol
--fno-defer-pop @gol
+-fmove-all-movables -fnew-ra -fno-branch-count-reg @gol
+-fno-default-inline -fno-defer-pop @gol
-fno-function-cse -fno-guess-branch-probability @gol
-fno-inline -fno-math-errno -fno-peephole -fno-peephole2 @gol
-funsafe-math-optimizations -ffinite-math-only @gol
-freduce-all-givs -fregmove -frename-registers @gol
-freorder-blocks -freorder-functions @gol
-frerun-cse-after-loop -frerun-loop-opt @gol
--fschedule-insns -fschedule-insns2 -fsignaling-nans @gol
+-fschedule-insns -fschedule-insns2 @gol
+-fno-sched-interblock -fno-sched-spec -fsched-spec-load @gol
+-fsched-spec-load-dangerous -fsignaling-nans @gol
-fsingle-precision-constant -fssa -fssa-ccp -fssa-dce @gol
-fstrength-reduce -fstrict-aliasing -ftracer -fthread-jumps @gol
-ftrapv -funroll-all-loops -funroll-loops @gol
@opindex target-help
Print (on the standard output) a description of target specific command
line options for each tool.
+
+@item --version
+@opindex version
+Display the version number and copyrights of the invoked GCC.
@end table
@node Invoking G++
a concatenated debug level. Instead use an additional @option{-g@var{level}}
option to change the debug level for DWARF1 or DWARF2.
+@item -feliminate-dwarf2-dups
+@opindex feliminate-dwarf2-dups
+Compress DWARF2 debugging information by eliminating duplicated
+information about each symbol. This option only makes sense when
+generating DWARF2 debugging information with @option{-gdwarf-2}.
+
@cindex @code{prof}
@item -p
@opindex p
Dump after function inlining, to @file{@var{file}.inlined}.
@end table
+@item -fsched-verbose=@var{n}
+@opindex fsched-verbose
+On targets that use instruction scheduling, this option controls the
+amount of debugging output the scheduler prints. This information is
+written to standard error, unless @option{-dS} or @option{-dR} is
+specified, in which case it is output to the usual dump
+listing file, @file{.sched} or @file{.sched2} respectively. However
+for @var{n} greater than nine, the output is always printed to standard
+error.
+
+For @var{n} greater than zero, @option{-fsched-verbose} outputs the
+same information as @option{-dRS}. For @var{n} greater than one, it
+also output basic block probabilities, detailed ready list information
+and unit/insn info. For @var{n} greater than two, it includes RTL
+at abort point, control-flow and regions info. And for @var{n} over
+four, @option{-fsched-verbose} also includes dependence info.
+
@item -save-temps
@opindex save-temps
Store the usual ``temporary'' intermediate files permanently; place them
for testing, so we are interested to hear about miscompilations with
@option{-fnew-ra}.
+@item -fno-branch-count-reg
+@opindex fno-branch-count-reg
+Do not use ``decrement and branch'' instructions on a count register,
+but instead generate a sequence of instructions that decrement a
+register, compare it against zero, then branch based upon the result.
+This option is only meaningful on architectures that support such
+instructions, which include x86, PowerPC, IA-64 and S/390.
+
@item -fno-function-cse
@opindex fno-function-cse
Do not put function addresses in registers; make each instruction that
assumptions based on that.
The default is @option{-fzero-initialized-in-bss}.
+
+@item -fbounds-check
+@opindex fbounds-check
+For front-ends that support it, generate additional code to check that
+indices used to access arrays are within the declared range. This is
+currenly only supported by the Java and Fortran 77 front-ends, where
+this option defaults to true and false respectively.
+
@end table
The following options control specific optimizations. The @option{-O2}
especially useful on machines with a relatively small number of
registers and where memory load instructions take more than one cycle.
+@item -fno-sched-interblock
+@opindex fno-sched-interblock
+Don't schedule instructions across basic blocks. This is normally
+enabled by default when scheduling before register allocation, i.e.@:
+with @option{-fschedule-insns} or at @option{-O2} or higher.
+
+@item -fno-sched-spec
+@opindex fno-sched-spec
+Don't allow speculative motion of non-load instructions. This is normally
+enabled by default when scheduling before register allocation, i.e.@:
+with @option{-fschedule-insns} or at @option{-O2} or higher.
+
+@item -fsched-spec-load
+@opindex fsched-spec-load
+Allow speculative motion of some load instructions. This only makes
+sense when scheduling before register allocation, i.e.@: with
+@option{-fschedule-insns} or at @option{-O2} or higher.
+
+@item -fsched-spec-load-dangerous
+@opindex fsched-spec-load-dangerous
+Allow speculative motion of more load instructions. This only makes
+sense when scheduling before register allocation, i.e.@: with
+@option{-fschedule-insns} or at @option{-O2} or higher.
+
@item -ffunction-sections
@itemx -fdata-sections
@opindex ffunction-sections
int profile_arc_flag = 0;
-/* Nonzero if we should not attempt to generate thread-safe
- code to profile program flow graph arcs. */
-
-int flag_unsafe_profile_arcs = 0;
-
/* Nonzero if generating info for gcov to calculate line test coverage. */
int flag_test_coverage = 0;
/* This will try to guess branch probabilities. */
int flag_guess_branch_prob = 0;
-/* -fbounded-pointers causes gcc to compile pointers as composite
- objects occupying three words: the pointer value, the base address
- of the referent object, and the address immediately beyond the end
- of the referent object. The base and extent allow us to perform
- runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
-int flag_bounded_pointers = 0;
-
/* -fcheck-bounds causes gcc to generate array bounds checks.
- For C, C++: defaults to value of flag_bounded_pointers.
- For ObjC: defaults to off.
+ For C, C++, ObjC: defaults to off.
For Java: defaults to on.
- For Fortran: defaults to off.
- For CHILL: defaults to off. */
+ For Fortran: defaults to off. */
int flag_bounds_check = 0;
/* This will attempt to merge constant section constants, if 1 only
N_("Support synchronous non-call exceptions") },
{"profile-arcs", &profile_arc_flag, 1,
N_("Insert arc based program profiling code") },
- {"unsafe-profile-arcs", &flag_unsafe_profile_arcs, 1,
- N_("Avoid thread safety profiling overhead") },
{"test-coverage", &flag_test_coverage, 1,
N_("Create data files needed by gcov") },
{"branch-probabilities", &flag_branch_probabilities, 1,
N_("Allow math optimizations that may violate IEEE or ANSI standards") },
{"signaling-nans", &flag_signaling_nans, 1,
N_("Disable optimizations observable by IEEE signaling NaNs") },
- {"bounded-pointers", &flag_bounded_pointers, 1,
- N_("Compile pointers as triples: value, base & end") },
{"bounds-check", &flag_bounds_check, 1,
- N_("Generate code to check bounds before dereferencing pointers and arrays") },
+ N_("Generate code to check bounds before indexing arrays") },
{"single-precision-constant", &flag_single_precision_constant, 1,
N_("Convert floating point constant to single precision constant") },
{"time-report", &time_report, 1,
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