https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85833
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Wojciech Mula from comment #0)
> There is a simple function, which checks if there is any non-zero element
> in a vector:
>
> ---ktest.c---
> #include <immintrin.h>
>
> int anynonzero_epi32(__m512i x) {
> const __m512i zero = _mm512_setzero_si512();
> const __mmask16 mask = _mm512_cmpneq_epi32_mask(x, zero);
> return mask != 0;
> }
> ---eof---
>
> $ gcc --version
> gcc (Debian 7.3.0-16) 7.3.0
>
> $ gcc -O2 -S -mavx512f ktest.c && cat ktest.s
ktestw is AVX512DQ instruction.
