[llvm] Reapply "[AArch64] Wrap integer SCALAR_TO_VECTOR nodes in bitcasts (#172837)" (#183380) (PR #184403)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

> I think there's a chance this clashed with https://github.com/llvm/llvm-project/pull/183282, as I'm seeing some test failures locally in CodeGen/AArch64/clmul-fixed.ll and CodeGen/AArch64/clmul.ll.

Yeah, noticing that too. Let me get a patch up to fix that.

https://github.com/llvm/llvm-project/pull/184403