[Bug tree-optimization/114908] fails to optimize avx2 in-register permute written with std::experimental::simd

[mkretz at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114908

--- Comment #7 from Matthias Kretz (Vir) <mkretz at gcc dot gnu.org> ---
I suspect resolving this is only one part of it. But I'm happy to be proven
wrong. :)

I opened PR114958 to track the simd implementation change.