[Bug tree-optimization/127645] [16/17 Regression] wrong code at -O2

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127645

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Maybe loading/storing the underlying storage would be OK, if that's worth it,
and using the unions alias-set.