[clang] Mechanically port bulk of x86 builtins to TableGen (PR #120831)

[Chandler Carruth via cfe-commits]

chandlerc wrote:

> When I was still involved in X86 my recollection was we primarily used LLi. It looks like there was a large replacement of LLi with Oi here fa8cd7691ac28d07f6a127ed26f0dbe49699bd59.

Yeah, this patch makes me think the change to `Oi` here is ultimately correct, and focuses types on the correct 64-bit integer type in the different languages.



https://github.com/llvm/llvm-project/pull/120831