[llvm] [AMDGPU] Enable vectorization of i8 values. (PR #134934)

[Gheorghe-Teodor Bercea via llvm-commits]

doru1004 wrote:

> No more comments from my side, since all changes are in TTI, not a vectorizer

Thank you Alexey.

https://github.com/llvm/llvm-project/pull/134934