[Bug tree-optimization/118483] [12/13/14/15 Regression] Missed optimization due to cast being used more than once

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118483

--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 60167
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=60167&action=edit
patch which I am testing for this