[Bug tree-optimization/123645] [12-16 Regression] Miscompile at -O1

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123645

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 63368
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=63368&action=edit
Simplified testcase