[Bug tree-optimization/120521] [14/15/16 Regregression] wrong code at -O3 with "-fno-tree-fre" on x86_64-linux-gnu (generated code hangs)

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120521

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
It looks like cunroll is doing the wrong thing.