[Bug tree-optimization/66951] [6 Regression] ICE at -O3 on x86_64-linux-gnu, verify_ssa failed

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66951

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r225923.