[Bug c/79319] sizeof returns the wrong size of a union containing aligned members

[erik at ehofman dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79319

--- Comment #4 from Erik Hofman <erik at ehofman dot com> ---
This was just the shortest snippet of code that showed the situation.

The reason for 32-byte alignment is that I use it with AVX code and wanted the
fastest possible assignment from a float vector.