Add support for differentiating between attributes ignored when handled and
unknown attributes that we discard. Add a diagnostic group for unknown
attribute warnings to allow turning these off when we don't care. Also
consolidates the tests for this case.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@107864 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed