Allow reference binding of a reference of Objective-C object type to
an lvalue of another, compatible Objective-C object type (e.g., a
subclass). Introduce a new initialization sequence step kind to
describe this binding, along with a new cast kind. Fixes PR7741.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@110513 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExpr.cpp b/lib/CodeGen/CGExpr.cpp
index 9424776..e2ccf55 100644
--- a/lib/CodeGen/CGExpr.cpp
+++ b/lib/CodeGen/CGExpr.cpp
@@ -1851,6 +1851,13 @@
ConvertType(CE->getTypeAsWritten()));
return LValue::MakeAddr(V, MakeQualifiers(E->getType()));
}
+ case CastExpr::CK_ObjCObjectLValueCast: {
+ LValue LV = EmitLValue(E->getSubExpr());
+ QualType ToType = getContext().getLValueReferenceType(E->getType());
+ llvm::Value *V = Builder.CreateBitCast(LV.getAddress(),
+ ConvertType(ToType));
+ return LValue::MakeAddr(V, MakeQualifiers(E->getType()));
+ }
}
llvm_unreachable("Unhandled lvalue cast kind?");