[Bug c/110683] wrong code with '-O2 -fpack-struct'

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110683

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
ms.c:299:24: warning: taking address of packed member of 'union U1' may result
in an unaligned pointer value [-Waddress-of-packed-member]