[llvm] [X86] Correct 32-bit immediate assertion and fix 64-bit lowering for huge frame offsets (PR #123872)

[Wesley Wiser via llvm-commits]

wesleywiser wrote:

At this point, I believe all review feedback has been responded to and CI is green.

If there's no other feedback, I would appreciate someone merging for me as I do not have merge rights. Thanks!

https://github.com/llvm/llvm-project/pull/123872