@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}.
@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-tree-original@r{[}-@var{n}@r{]} -fdump-tree-optimized@r{[}-@var{n}@r{]} @gol
-fdump-tree-inlined@r{[}-@var{n}@r{]} @gol
-fmem-report -fpretend-float @gol
--fprofile-arcs -ftest-coverage -ftime-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
-fgcse -fgcse-lm -fgcse-sm @gol
-finline-functions -finline-limit=@var{n} -fkeep-inline-functions @gol
-fkeep-static-consts -fmerge-constants -fmerge-all-constants @gol
--fmove-all-movables -fno-default-inline -fno-defer-pop @gol
+-fmove-all-movables -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 -fno-trapping-math @gol
-freduce-all-givs -fregmove -frename-registers @gol
-frerun-cse-after-loop -frerun-loop-opt @gol
-fschedule-insns -fschedule-insns2 @gol
+-fno-sched-interblock -fno-sched-spec @gol
+-fsched-spec-load -fsched-spec-load-dangerous @gol
-fsingle-precision-constant -fssa -fssa-ccp -fssa-dce @gol
-fstrength-reduce -fstrict-aliasing -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++
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 -fpretend-float
@opindex fpretend-float
When running a cross-compiler, pretend that the target machine uses the
have distinct location, so using this option will result in non-conforming
behavior.
+@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
math functions.
The default is @option{-ftrapping-math}.
+
+@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
projects / thirdparty / gcc.git / commitdiff
