Doug Gregor 800e3818b7 [Type metadata] @objc protocol conformance requirements don't have arguments. ...

@objc protocols don't have witness tables. However, both type metadata
(in the nominal type descriptors) and the runtime code to demangle
type names into metadata weren't acknowledging this. Fix type metadata
emission to not count an "extra argument" for @objc protocol
conformance requirements, and teach the runtime code to properly look
for conformances to @objc protocols (through the Objective-C runtime)
and not record witness tables for them.

2018-02-15 14:07:46 -08:00

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