diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index a154b7c..c99af2c 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -264,7 +264,7 @@ in the following sections. @xref{Optimize Options,,Options that Control Optimization}. @gccoptlist{-falign-functions=@var{n} -falign-jumps=@var{n} @gol -falign-labels=@var{n} -falign-loops=@var{n} @gol --fbranch-probabilities -fprofile-values -fbranch-target-load-optimize @gol +-fbranch-probabilities -fprofile-values -fvpt -fbranch-target-load-optimize @gol -fbranch-target-load-optimize2 -fcaller-saves -fcprop-registers @gol -fcse-follow-jumps -fcse-skip-blocks -fdata-sections @gol -fdelayed-branch -fdelete-null-pointer-checks @gol @@ -4564,6 +4564,16 @@ With @option{-fbranch-probabilities}, it reads back the data gathered from profiling values of expressions and adds @samp{REG_VALUE_PROFILE} notes to instructions for their later usage in optimizations. +@item -fvpt +@opindex fvpt +If combined with @option{-fprofile-arcs}, it instructs the compiler to add +a code to gather information about values of expressions. + +With @option{-fbranch-probabilities}, it reads back the data gathered +and actually performs the optimizations based on them. +Currently the optimizations include specialization of division operation +using the knowledge about the value of the denominator. + @item -fnew-ra @opindex fnew-ra Use a graph coloring register allocator. Currently this option is meant |