[Bug tree-optimization/66502] SCCVN can't handle PHIs optimistically optimally

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66502

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
SCCVN preference changed.  Missed optimization remains (now the other variant).