[Substitution map] When the superclass conforms to a protocol directly use it #21509
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…y, use it. When looking up a conformance in a substitution map, check whether there is a superclass constraint that satisfies the conformance. If so, use it directly rather than going through a slower path to find it. Addresses rdar://problem/46655186.
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@swift-ci please smoke test and merge |
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When looking up a conformance in a substitution map, check whether
there is a superclass constraint that satisfies the conformance. If
so, use it directly rather than going through a slower path to find
it.
Addresses rdar://problem/46655186.