objc++-arc: diagnose assignment/cast of a weak-unavailable
object to a __weak object/type. // rdar://9732636.
One item is yet todo.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134655 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed