[Bug tree-optimization/117776] [12/13/14/15 Regression] Missed optimization/vectorization opportunity (adding a even/odd check to an accumulator)

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117776

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note this is specificly related to the even odd/check rather than anything
else.