[Bug tree-optimization/82224] Strict-aliasing not noticing valid aliasing of two unions with active members

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82224

--- Comment #13 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
See

http://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_236.htm
http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1409.htm