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a8452b4076
Looking up the conformance @dynamic_self C<T> : P simply returns the normal conformance C<T> : P. If we later apply a substitution map to the conformance to specialize T, we would call isSpecialized() on the substituted type, which would return false. We would then hit an assertion because the type type @dynamic_self C<Int> is not equal to the (erroneously unsubstituted) conformance type C<T>. Tweak the logic slightly to avoid this.
30 lines
1.2 KiB
Swift
30 lines
1.2 KiB
Swift
// RUN: %target-swift-frontend -emit-sil -O -primary-file %s | %FileCheck %s
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protocol P {}
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extension P {
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@_semantics("optimize.sil.never") func method1() {}
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@inline(__always) func method2() { method1() }
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}
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class C<T> : P {
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// CHECK-LABEL: sil shared [always_inline] @_T023specialize_dynamic_self1CC11returnsSelfACyxGXDyFSi_Tg5 : $@convention(method) (@guaranteed C<Int>) -> @owned C<Int>
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// CHECK: [[RESULT:%.*]] = alloc_stack $C<Int>
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// CHECK: [[FN:%.*]] = function_ref @_T023specialize_dynamic_self1PPAAE7method1yyF : $@convention(method) <τ_0_0 where τ_0_0 : P> (@in_guaranteed τ_0_0) -> ()
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// CHECK: apply [[FN]]<@dynamic_self C<Int>>([[RESULT]]) : $@convention(method) <τ_0_0 where τ_0_0 : P> (@in_guaranteed τ_0_0) -> ()
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// CHECK: return %0 : $C<Int>
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@inline(__always)
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final func returnsSelf() -> Self {
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method2()
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return self
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}
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}
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// CHECK-LABEL: sil hidden [thunk] [always_inline] @_T023specialize_dynamic_self8usesCIntyAA1CCySiG1c_tF : $@convention(thin) (@owned C<Int>) -> () {
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// CHECK: function_ref @_T023specialize_dynamic_self1CC11returnsSelfACyxGXDyFSi_Tg5 : $@convention(method) (@guaranteed C<Int>) -> @owned C<Int>
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// CHECK: return
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func usesCInt(c: C<Int>) {
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_ = c.returnsSelf()
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}
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