in addition of receiver having static type, but also when
receiver has dynamic type (of 'id' variety) as well as when
receiver is of 'Class' type vareity. // rdar://7853549


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184195 91177308-0d34-0410-b5e6-96231b3b80d8