[Bug tree-optimization/121279] [14/15/16 Regression] wrong code due to load of a bool from an union being pulled out of loop

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121279

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I should mention this fails at -O1 and -Os.