[llvm] [X86] Avoid invalid ret for EH_RETURN with SHSTK (PR #219322)

[Phoebe Wang via llvm-commits]

phoebewang wrote:

Changes look good, but I'm not familiar with `llvm.eh.return`. @bodand Would you help check if the problem fixed with this?

https://github.com/llvm/llvm-project/pull/219322