[Bug tree-optimization/50272] A case that PRE optimization hurts performance

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50272

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
In GCC 5+ we can get rid of the loop fully (in the reduced testcase).