[Bug tree-optimization/68373] autopar fails on loop exit phi with argument defined outside loop

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68373

--- Comment #2 from vries at gcc dot gnu.org ---
Created attachment 36762
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36762&action=edit
Updated patch, to be tested