diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 8141811..014c9f4 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -12806,6 +12806,15 @@ loop unrolling. This option is enabled by default at optimization levels @option{-O1}, @option{-O2}, @option{-O3}, @option{-Os}. +@opindex favoid-store-forwarding +@item -favoid-store-forwarding +@itemx -fno-avoid-store-forwarding +Many CPUs will stall for many cycles when a load partially depends on previous +smaller stores. This pass tries to detect such cases and avoid the penalty by +changing the order of the load and store and then fixing up the loaded value. + +Disabled by default. + @opindex ffp-contract @item -ffp-contract=@var{style} @option{-ffp-contract=off} disables floating-point expression contraction. |