[llvm] [WebAssembly] Add getMinVectorRegisterBitWidth overriding (PR #189465)

[Jasmine Tang via llvm-commits]

badumbatish wrote:

> Thanks this is interesting. I'm not sure how to interpret the first 2 comparisons you posted. what's the difference between them?

Thanks Derek. For the first two comparison, I perform the same run two different times under -O2 and it turns out it doesn't really matter performance wise with or without my PR or not.

Then I use wasmtime's O0, and got the final comparison.

Should I merge this change?? 

https://github.com/llvm/llvm-project/pull/189465