[Bug tree-optimization/93843] [10 Regression] wrong code at -O3 on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93843

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
IIRC Richard made this valid but maybe didn't expect targets to advertise
support for it (how do we check this?)