[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 #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I should mention that LLVM has been having some discussions in the area of bool
not being 0/1 too:
https://discourse.llvm.org/t/defining-what-happens-when-a-bool-isn-t-0-or-1/86778/17