[Bug libstdc++/118416] std::experimental::simd code detecting all zero is not optimized to simple ptest on x86-64 avx

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118416

--- Comment #3 from Matthias Kretz (Vir) <mkretz at gcc dot gnu.org> ---
And thank you for the detailed analysis! I really would like to see this
optimized, too!