[lld] [LLD][COFF] Add support for ARM64X same-address thunks (PR #151255)

[Jacek Caban via llvm-commits]

cjacek wrote:

Thanks for the review! I’ve pushed a new version that addresses the comments.

I also removed one more arm64x check, since those chunks are currently only generated in that case. It was a leftover from an earlier version, where I generated the chunks for arm64ec as well (like MSVC). That approach ended up being worse than a no-op, since it pulled in additional, unnecessary code. I’ve removed it for now, but I’m happy to revisit if we find a case where it’s needed.

https://github.com/llvm/llvm-project/pull/151255