[llvm-branch-commits] [clang] release/18.x: [ObjC] Check entire chain of superclasses to determine class layout (PR #84093)

[Eli Friedman via llvm-branch-commits]

https://github.com/efriedma-quic requested changes to this pull request.

We usually only take bugfixes on release branches (miscompiles/crashes/etc.).

https://github.com/llvm/llvm-project/pull/84093