[4.2] SIL: Profile the witnessMethodConformance as part of the SILFun… #19464
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…ctionType
We use to return a SILFunctionType with a wrong witness method protocol
conformance e.g when there were base protocols.
Scope: We would end up with wrong protocol conformances in SIL function types. Any consumer that relies on their correctness could fail
Risk: Low – it seems so far no one has discovered that hey where wrong in the first place.
Testing: Normal test suite.
Reviewers: John Mccall
rdar://44691234