swift-mirror/test/SILGen/weak_linked_attribute.swift at 74c8fcfc6602955ce3fc87a7fc5855592f2e4db7 - swift-mirror - Gitea: Git with a cup of tea

averello/swift-mirror

mirror of https://github.com/apple/swift.git synced 2025-12-14 20:36:38 +01:00

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Slava Pestov 3a59e7c53a SIL: Serialize availability with the SIL function, not just a weak imported flag

The weak imported flag is now only set if the attribute is unconditionally
weak linked, which is the case when it or one of its parent contexts has a
@_weakLinked attribute.

To correctly handle weak linking based availability with serialized SIL
functions, we need to serialize the actual version tuple when the SIL function
was introduced. This is because the deployment target of the client app can
be older than the deployment target that the original module was built with.

Fixes <rdar://problem/52783668>.

2019-09-06 20:08:40 -04:00

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 // RUN: %target-swift-emit-silgen %s | %FileCheck %s
 // UNSUPPORTED: OS=windows-msvc
 // CHECK-LABEL: sil [weak_imported] [ossa] @$s21weak_linked_attribute0A8FunctionyyF : $@convention(thin) () -> ()
 @_weakLinked public func weakFunction() {}