[Bug c/102268] Wrong code with aliasing union pointers

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102268

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Oh, and related to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82224