[Bug tree-optimization/101639] vectorization with bool reduction

[liuhongt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101639

--- Comment #10 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---
clang generates

avx512:
f(int*, long):
        vmovdqu xmm0, xmmword ptr [rdi]
        vptestnmd       k0, xmm0, xmm0
        kortestb        k0, k0
        sete    al
        ret

avx2:
f(int*, long):
        vpxor   xmm0, xmm0, xmm0
        vpcmpeqd        xmm0, xmm0, xmmword ptr [rdi]
        vmovmskps       eax, xmm0
        test    eax, eax
        sete    al
        ret

Maybe GCC can reuse cstorem4 similar as cbranchm4 for those mask.