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EmittedMembersRequest needs a stable order for synthesized members to ensure that vtable layout is computed consistently across frontend jobs. This used to use the mangled name as the sort key. However, the mangling includes the type of all outer contexts, and if an outer type is a closure, we would need to compute the type of the closure. Computing the type of a closure might require type checking its body though, which would in turn type check the local class, which would invoke EmittedMembersRequest, introducing a cycle. Instead, let's use the DeclName and string-ified type as the sort key. This is simpler to compute than th mangled name, and breaks the cycle. Fixes <rdar://problem/67842221>.
18 lines
936 B
Swift
18 lines
936 B
Swift
// Test both orderings, and single-file vs WMO
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// RUN: %target-swift-frontend -emit-ir -primary-file %s %S/Inputs/rdar67842221-other.swift -module-name main
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// RUN: %target-swift-frontend -emit-ir %s -primary-file %S/Inputs/rdar67842221-other.swift -module-name main
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// RUN: %target-swift-frontend -emit-ir -primary-file %S/Inputs/rdar67842221-other.swift %s -module-name main
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// RUN: %target-swift-frontend -emit-ir %S/Inputs/rdar67842221-other.swift -primary-file %s -module-name main
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// RUN: %target-swift-frontend -emit-ir %S/Inputs/rdar67842221-other.swift %s -module-name main
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// RUN: %target-swift-frontend -emit-ir %S/Inputs/rdar67842221-other.swift %s -module-name main
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// The closure defines a local class; we want to make sure there is no cycle
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// between computing the semantic members of the local class (which requires
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// sorting) and computing the type of the closure value
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public func force() {
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_ = closureValue
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}
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