Andrew Trick a90b515df9 Fix type lowering of ~Escapable generics. ...

Factor AbstractionPattern::conformsToKnownProtocol and lower ~Escapable using the same logic as ~Copyable.

Adds support for conditionally Escapable enums.

Correctly sets the SILType::isTrivial flags for conditionally escapable structs and enums in environments (extensions)
that provide an Escapable conformance, such as:

    struct NE<E: ~Escapable> : ~Escapable {}

    extension NE: Escapable {
      func foo() -> Self {
        // Self is both Escapable and trivial here.
        self
      }
    }

Fixes rdar://125950218 ([nonescapable] support conditionally escapable enums)

2024-04-07 22:58:28 -07:00

64 KiB

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