[Bug tree-optimization/128516] `x unorder CST` should be optimized to `x unorder x`

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128516

--- Comment #2 from Drea Pinski <pinskia at gcc dot gnu.org> ---
The same is also true of order rather than unorder.