[Bug tree-optimization/69069] missing phi argument with -ftree-parallelize-loops=2

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69069

--- Comment #1 from vries at gcc dot gnu.org ---
Created attachment 37199
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37199&action=edit
tentative patch