[Bug tree-optimization/66949] [6 Regression] ICE at -O2 and -O3 on x86_64-linux-gnu in tree_ssa_phiopt_worker, at tree-ssa-phiopt.c:335

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66949

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r225722.