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47 lines
2.0 KiB
Swift
47 lines
2.0 KiB
Swift
// RUN: %target-swift-emit-silgen %s | %FileCheck %s --check-prefixes=CHECK,CHECK-NO-WEAK-LET
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// RUN: %target-swift-emit-silgen -enable-upcoming-feature ImmutableWeakCaptures %s | %FileCheck %s --check-prefixes=CHECK,CHECK-HAS-WEAK-LET
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// REQUIRES: swift_feature_ImmutableWeakCaptures
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// https://github.com/apple/swift/issues/50924
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func fibonacci(_ n: Int) -> Int {
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var cache: [Int: Int] = [:]
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func recursive(_ m: Int) -> Int {
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return cache[m] ?? {
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// Make sure cache is only captured once in the closure
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// CHECK: implicit closure #1 in recursive #1
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// CHECK-LABEL: sil private [transparent] [ossa] @{{.*}}9fibonacci{{.*}}9recursive{{.*}} : $@convention(thin) {{.*}} @guaranteed { var Dictionary<Int, Int> }) ->
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// CHECK: closure #1 in implicit closure #1 in recursive #1
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// CHECK-LABEL: sil private [ossa] @{{.*}}9fibonacci{{.*}}9recursive{{.*}} : $@convention(thin) {{.*}} @guaranteed { var Dictionary<Int, Int> }) ->
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let output = m < 2 ? m : recursive(m - 1) + recursive(m - 2)
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cache[m] = output
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return output
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}()
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}
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return recursive(n)
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}
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class C {
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required init() {}
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func f() {}
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// Make sure that we capture dynamic self type if an explicit self isn't guaranteed
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func returnsSelf() -> Self {
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return { self.f(); return .init() }()
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// CHECK-LABEL: sil private [ossa] @{{.*}}returnsSelf{{.*}} : $@convention(thin) (@guaranteed C) -> @owned C
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}
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func returnsSelf1() -> Self {
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return { [weak self] in self?.f(); return .init() }()
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// CHECK-LABEL: sil private [ossa] @{{.*}}returnsSelf{{.*}} : $@convention(thin) (@guaranteed { var @sil_weak Optional<C> }, @thick @dynamic_self C.Type) -> @owned C
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}
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func returnsSelf2() -> Self {
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return { [unowned self] in self.f(); return .init() }()
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// CHECK-LABEL: sil private [ossa] @{{.*}}returnsSelf{{.*}} : $@convention(thin) (@guaranteed @sil_unowned C, @thick @dynamic_self C.Type) -> @owned C
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}
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}
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