Make DiagnosticOptions intrusively reference-counted, and make sure
the various stakeholders bump up the reference count. In particular,
the diagnostics engine now keeps the DiagnosticOptions object alive.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166508 91177308-0d34-0410-b5e6-96231b3b80d8
38 files changed