[Bug tree-optimization/86886] Gcc miscompiles at -O3 on valid code

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86886

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I don't think this is a bug.  You are taking the address of a field of an union
and accessing via that address.  This is not tracked at all.