Add a new placeholder type to represent "unbridged"
casts in ARC.

No semantic analysis yet.

llvm-svn: 142208
diff --git a/clang/lib/CodeGen/CGRTTI.cpp b/clang/lib/CodeGen/CGRTTI.cpp
index fbdb298..c4526fc4 100644
--- a/clang/lib/CodeGen/CGRTTI.cpp
+++ b/clang/lib/CodeGen/CGRTTI.cpp
@@ -199,6 +199,7 @@
     case BuiltinType::Dependent:
     case BuiltinType::BoundMember:
     case BuiltinType::UnknownAny:
+    case BuiltinType::ARCUnbridgedCast:
       llvm_unreachable("asking for RRTI for a placeholder type!");
       
     case BuiltinType::ObjCId: