[clang] [llvm] [PowerPC] Add Support for BCDSHIFT, BCDSHIFTR, BCDTRUNC, BCDUTRUNC, and BCDUSHIFT instruction support (PR #154715)

[Aditi Medhane via llvm-commits]

AditiRM wrote:

Hi @s-barannikov, I’m running into a merge conflict while rebasing on top of your recent change [[PowerPC] TableGen-erate SDNode descriptions](https://github.com/llvm/llvm-project/pull/link)
I’m trying to understand where the backend-lowering logic should reside now, given the new structure. Could you clarify the appropriate location or pattern to follow for lowering code after this refactor?

https://github.com/llvm/llvm-project/pull/154715