When inferring the result type of a block based on a return statement

with a type-dependent expression, infer the placeholder type
'Context.DependentTy' to indicate that this is just a
placeholder. Fixes PR9982 / <rdar://problem/9486685>.

llvm-svn: 132657

clang/lib/CodeGen/CodeGenModule.cpp

@@ -2082,6 +2082,7 @@ void CodeGenModule::EmitTopLevelDecl(Decl *D) {
   case Decl::FunctionTemplate:
   case Decl::TypeAliasTemplate:
   case Decl::NamespaceAlias:
+  case Decl::Block:
     break;
   case Decl::CXXConstructor:
     // Skip function templates