[PATCH] D30599: [ubsan] Extend the nonnull argument check to ObjC

[Jonathan Roelofs via Phabricator via cfe-commits]

jroelofs added a comment.

Can the null check be performed in the callee?

That'd make this check work for a few more cases that this patch doesn't cover:

- `performSelector:` messages
- messages to `id`.


https://reviews.llvm.org/D30599