[llvm] [Vectorize] Vectorization for __builtin_prefetch (PR #66160)

[via llvm-commits]

m-saito-fj wrote:

> Could we add 1.1 + 2.1 + tests for some architecture (maybe aarch64 without sve) in one patch, with 3.1 added in a second. 1.2+3.2+tests can then make up the third.

Thank you for the suggestion.
I will proceed with what you suggested. I will close this request after I make another pull request.

https://github.com/llvm/llvm-project/pull/66160