[Bug tree-optimization/20083] Missed optimization with conditional and basically ||

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=20083

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Take f4, if we compile with -O1 -fno-tree-sink, you will see the behavior we
get for f.