[Bug tree-optimization/66002] paq8p benchmark 50% slower than clang on sandybridge

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66002

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
I'm testing adding a mergephi pass instead of moving the existing one.