[Bug ipa/68672] [4.9/5/6 Regression] g++.dg/torture/pr68470.C: ICE: cannot update SSA form: statement uses released SSA name

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68672

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 37657
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37657&action=edit
gcc6-pr68672-wip.patch

WIP patch.