swift

48680a8e - [Serialization] Always read opaque type underlying types in merge-module

[Serialization] Always read opaque type underlying types in merge-module When reading a swiftmodule that's part of the main module the compiler should have access to all internal details. In that case, read the underlying type to opaque types. This was caught by `SILOptimizer/specialize_opaque_result_types2.sil` which has a merge-module like behavior reading it sib files as input.