[llvm] [AArch64] Generate rev16 for certain uses of __builtin_bswap16 (PR #105375)

[David Green via llvm-commits]

https://github.com/davemgreen commented:

Hi - I think this sounds good. There might be a way to handle this where it is performed from the demanded bits of the operation, but that isn't easy to do during selection and performing it at least for the anyext case sounds good for the time being.

I had some comments inline.

https://github.com/llvm/llvm-project/pull/105375