Warn on inaccessible direct base


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@226423 91177308-0d34-0410-b5e6-96231b3b80d8

of its parent context, be sure to update the parent-context pointer
after instantiation. Fixes two anonymous-union instantiation issues in
<rdar://problem/8635664>.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@118313 91177308-0d34-0410-b5e6-96231b3b80d8

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92141 91177308-0d34-0410-b5e6-96231b3b80d8