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8f38532018
Unowned references lower as address-only or loadable, depending on whether the underlying class type is known to be native Swift or not. In the case where we were lowering an interface type, we would unconditionally erase the type to AnyObject, producing an incorrect lowering when the generic signature constrained the type parameter to a native Swift class. Fixes <rdar://problem/73083179>.
23 lines
1.1 KiB
Swift
23 lines
1.1 KiB
Swift
// RUN: %target-swift-emit-silgen %s -enable-objc-interop | %FileCheck %s
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protocol ClassProtocol: AnyObject {}
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class BaseClass {}
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func makeGenericClosureWithUnknownClass<T>(t: T) where T : ClassProtocol {
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_ = { [unowned t] in _ = t }
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}
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// CHECK-LABEL: sil private [ossa] @$s4main34makeGenericClosureWithUnknownClass1tyx_tAA0G8ProtocolRzlFyycfU_ : $@convention(thin) <T where T : ClassProtocol> (@guaranteed <τ_0_0 where τ_0_0 : ClassProtocol> { var @sil_unowned τ_0_0 } <T>) -> () {
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func makeGenericClosureWithNativeClass1<T>(t: T) where T : BaseClass {
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_ = { [unowned t] in _ = t }
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}
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// CHECK-LABEL: sil private [ossa] @$s4main34makeGenericClosureWithNativeClass11tyx_tAA9BaseClassCRbzlFyycfU_ : $@convention(thin) <T where T : BaseClass> (@guaranteed @sil_unowned T) -> () {
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func makeGenericClosureWithNativeClass2<T>(t: T) where T : ClassProtocol, T : BaseClass {
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_ = { [unowned t] in _ = t }
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}
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// CHECK-LABEL: sil private [ossa] @$s4main34makeGenericClosureWithNativeClass21tyx_tAA9BaseClassCRbzAA0I8ProtocolRzlFyycfU_ : $@convention(thin) <T where T : BaseClass, T : ClassProtocol> (@guaranteed @sil_unowned T) -> () { |