[llvm] [GISel] Legalize bitreverse with types smaller than 8 bits (PR #92998)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> Test the vector cases too?

IRTranslator haven't supported vector intrinsics yet :(
See https://godbolt.org/z/xTfGMfEr3


https://github.com/llvm/llvm-project/pull/92998