[libc-commits] [libc] Implement vector version of memchr, and dispatch to same (PR #177711)

[Joseph Huber via libc-commits]

https://github.com/jhuber6 approved this pull request.

LG to me, would be interesting to see a comparison between the x64 intrinsics and the clang vectors

https://github.com/llvm/llvm-project/pull/177711