[Bug tree-optimization/70546] ifconvert if(cond) ++count; to count += cond; fails because of mergephi and failed loop header copying

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70546

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
f0 started to vectorize in GCC 8.
f1 still is not.