https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123192
--- Comment #2 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot
Uni-Bielefeld.DE> ---
> --- Comment #1 from Robin Dapp <rdapp at gcc dot gnu.org> ---
> Hmm, not sure what the proper fix is right away.
> Maybe
>
> /* { dg-require-effective-target ctz } */
>
> just like in the other, similar tests is sufficient? Do you have a way of
> verifying that?
Sure: it does indeed, turning the test UNSUPPORTED while it still works
on i386-pc-solaris2.11.