[Bug tree-optimization/117965] phiprop fails in some cases

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117965

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 59825
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59825&action=edit
Fix

Note this includes debugging still and no testcases. And has only done some
quick testing on the testcases.