[PATCH] D49511: [Sema/Attribute] Check for noderef attribute

[Roland McGrath via Phabricator via cfe-commits]

mcgrathr added a comment.

The motivating use case always pairs `noderef` with an `address_space` attribute, and it's already invalid to convert between pointer types in different address spaces without a cast.
So I don't think we have a strong opinion one way or the other.  In the abstract, I'd say `noderef` feels like a "constraining" qualifier a la const/volatile so that going from unconstrained to constrained implicitly is OK but not vice versa.


Repository:
  rC Clang

https://reviews.llvm.org/D49511