[Bug tree-optimization/88464] AVX-512 vectorization of masked scatter failing with "not suitable for scatter store"

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88464

--- Comment #23 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #22)
> (In reply to Uroš Bizjak from comment #21)
> > Indeed, -mavx512dq produces expected ktestb. Sorry for the false alarm.
> 
> f3 and f4 functions however can use ktestw even without -mavx512dq.

Eh, not my day. We can use kortestw to check if operand is zero with -mavx512f.