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

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

@arsenm Can I add some vector tests with `-global-isel-abort=0` as we did in https://github.com/llvm/llvm-project/pull/93063?


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