[llvm] [X86] Align f128 and i128 to 16 bytes when passing on x86-32 (PR #138092)

[Nikita Popov via llvm-commits]

https://github.com/nikic approved this pull request.

LGTM from my side.

Looks like this needs a rebase.

https://github.com/llvm/llvm-project/pull/138092