swift

b3f302b9 - [IRGen] Fix a bug where an argument wasn't annotated with sret (#71459)

[IRGen] Fix a bug where an argument wasn't annotated with sret (#71459) Fix a bug in expandExternalSignatureTypes where it wasn't annotating a function call parameter type with sret when the result was being returned indirectly. The bug was causing calls to ObjC methods that return their results indirectly to crash. Additionally, fix the return type for C++ constructors computed in expandExternalSignatureTypes. Previously, the return type was always void even on targets that require constructors to return this (e.g., Apple arm64), which was causing C++ constructor thunks to be emitted needlessly. Resolves rdar://121618707