This commit extends the DIDerivedTypeAttr with the `extraData` field. For now, the type of it is limited to be a `DINodeAttr`, as extending the debug metadata handling to support arbitrary metadata nodes does not seem to be necessary so far.
This commit extends the DIDerivedTypeAttr with the `extraData` field. For now, the type of it is limited to be a `DINodeAttr`, as extending the debug metadata handling to support arbitrary metadata nodes does not seem to be necessary so far.