[Bug tree-optimization/119103] Very suboptimal AVX2 code generation of simple shift loop

[gcc at haasn dot dev via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119103

--- Comment #1 from Niklas Haas <gcc at haasn dot dev> ---
Clang's output for comparison:

lshift:
        vmovdqu ymm0, ymmword ptr [rdi]
        vmovd   xmm1, esi
        vpsllw  ymm0, ymm0, xmm1
        vmovdqu ymmword ptr [rdi], ymm0
        vzeroupper
        ret