diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 3aefa09c89f..fda884b76eb 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -343,7 +343,7 @@ Objective-C and Objective-C++ Dialects}. -fdelayed-branch -fdelete-null-pointer-checks -fdse -fdse @gol -fearly-inlining -fipa-sra -fexpensive-optimizations -ffast-math @gol -ffinite-math-only -ffloat-store -fexcess-precision=@var{style} @gol --fforward-propagate -ffunction-sections @gol +-fforward-propagate -ffp-contract=@var{style} -ffunction-sections @gol -fgcse -fgcse-after-reload -fgcse-las -fgcse-lm -fgraphite-identity @gol -fgcse-sm -fif-conversion -fif-conversion2 -findirect-inlining @gol -finline-functions -finline-functions-called-once -finline-limit=@var{n} @gol @@ -5992,6 +5992,18 @@ loop unrolling. This option is enabled by default at optimization levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}. +@item -ffp-contract=@var{style} +@opindex ffp-contract +@option{-ffp-contract=off} disables floating-point expression contraction. +@option{-ffp-contract=fast} enables floating-point expression contraction +such as forming of fused multiply-add operations if the target has +native support for them. +@option{-ffp-contract=on} enables floating-point expression contraction +if allowed by the language standard. This is currently not implemented +and treated equal to @option{-ffp-contract=off}. + +The default is @option{-ffp-contract=fast}. + @item -fomit-frame-pointer @opindex fomit-frame-pointer Don't keep the frame pointer in a register for functions that |