| // RUN: %target-swift-frontend -enable-sil-opaque-values -enable-sil-ownership -emit-sorted-sil -Xllvm -sil-full-demangle -emit-silgen -parse-stdlib -parse-as-library %s | %FileCheck %s |
| |
| public protocol UnkeyedDecodingContainer { |
| var isAtEnd: Builtin.Int1 { get } |
| } |
| |
| public protocol Decoder { |
| func unkeyedContainer() throws -> UnkeyedDecodingContainer |
| } |
| |
| // Test open_existential_value ownership |
| // --- |
| // CHECK-LABEL: sil @_T016opaque_ownership11takeDecoderBi1_AA0D0_p4from_tKF : $@convention(thin) (@in Decoder) -> (Builtin.Int1, @error Builtin.NativeObject) { |
| // CHECK: bb0(%0 : @owned $Decoder): |
| // CHECK: [[BORROW1:%.*]] = begin_borrow %0 : $Decoder |
| // CHECK: [[OPENED:%.*]] = open_existential_value [[BORROW1]] : $Decoder to $@opened("{{.*}}") Decoder |
| // CHECK: [[WT:%.*]] = witness_method $@opened("{{.*}}") Decoder, #Decoder.unkeyedContainer!1 : <Self where Self : Decoder> (Self) -> () throws -> UnkeyedDecodingContainer, %4 : $@opened("{{.*}}") Decoder : $@convention(witness_method) <τ_0_0 where τ_0_0 : Decoder> (@in_guaranteed τ_0_0) -> (@out UnkeyedDecodingContainer, @error Builtin.NativeObject) |
| // CHECK: try_apply [[WT]]<@opened("{{.*}}") Decoder>([[OPENED]]) : $@convention(witness_method) <τ_0_0 where τ_0_0 : Decoder> (@in_guaranteed τ_0_0) -> (@out UnkeyedDecodingContainer, @error Builtin.NativeObject), normal bb2, error bb1 |
| // |
| // CHECK:bb{{.*}}([[RET1:%.*]] : @owned $UnkeyedDecodingContainer): |
| // CHECK: end_borrow [[BORROW1]] from %0 : $Decoder, $Decoder |
| // CHECK: [[BORROW2:%.*]] = begin_borrow [[RET1]] : $UnkeyedDecodingContainer |
| // CHECK: [[OPENED2:%.*]] = open_existential_value [[BORROW2]] : $UnkeyedDecodingContainer to $@opened("{{.*}}") UnkeyedDecodingContainer |
| // CHECK: [[WT2:%.*]] = witness_method $@opened("{{.*}}") UnkeyedDecodingContainer, #UnkeyedDecodingContainer.isAtEnd!getter.1 : <Self where Self : UnkeyedDecodingContainer> (Self) -> () -> Builtin.Int1, [[OPENED2]] : $@opened("{{.*}}") UnkeyedDecodingContainer : $@convention(witness_method) <τ_0_0 where τ_0_0 : UnkeyedDecodingContainer> (@in_guaranteed τ_0_0) -> Builtin.Int1 |
| // CHECK: [[RET2:%.*]] = apply [[WT2]]<@opened("{{.*}}") UnkeyedDecodingContainer>([[OPENED2]]) : $@convention(witness_method) <τ_0_0 where τ_0_0 : UnkeyedDecodingContainer> (@in_guaranteed τ_0_0) -> Builtin.Int1 |
| // CHECK: end_borrow [[BORROW2]] from [[RET1]] : $UnkeyedDecodingContainer, $UnkeyedDecodingContainer |
| // CHECK: destroy_value [[RET1]] : $UnkeyedDecodingContainer |
| // CHECK: destroy_value %0 : $Decoder |
| // CHECK: return [[RET2]] : $Builtin.Int1 |
| // CHECK-LABEL: } // end sil function '_T016opaque_ownership11takeDecoderBi1_AA0D0_p4from_tKF' |
| public func takeDecoder(from decoder: Decoder) throws -> Builtin.Int1 { |
| let container = try decoder.unkeyedContainer() |
| return container.isAtEnd |
| } |
