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A witness table instantiation function can end up referring to conditional requirements to, e.g., fill in base witness tables. Store the conditional requirements first, and also bind the witness tables for conditional requirements within the local scope so they can be used directly. Fixes SR-6478.
46 lines
2.1 KiB
Swift
46 lines
2.1 KiB
Swift
protocol P1 {
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associatedtype A: P1
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}
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protocol P2: P1 where A: P2 {
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associatedtype B
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}
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struct Wrapper<T: P1>: P1 {
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typealias A = Wrapper<T>
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}
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extension Wrapper: P2 where T: P2 {
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typealias B = T.A
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}
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protocol P3: P2 where A: P3 { }
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extension Wrapper: P3 where T: P3 { }
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// instantiation function for Wrapper<T>: P3
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// CHECK-LABEL: define internal void @_T033conditional_conformance_recursive7WrapperVyxGAA2P3A2aERzrlWI
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// CHECK-NOT: ret
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// CHECK: call i8** @_T033conditional_conformance_recursive7WrapperVyxGAA2P2A2aERzrlWa
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// associated type metadata accessor for B in Wrapper<T>: P2
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// CHECK-LABEL: define internal %swift.type* @_T033conditional_conformance_recursive7WrapperVyxGAA2P2A2aERzrl1BWt
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// CHECK: [[T_TO_P2_PTR:%.*]] = getelementptr inbounds i8*, i8** [[WRAPPER_T_TO_P2:%.*]], i32 -1
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// CHECK: [[T_TO_P2_VAL:%.*]] = load i8*, i8** [[T_TO_P2_PTR]]
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// CHECK: [[T_TO_P2:%.*]] = bitcast i8* [[T_TO_P2_VAL]] to i8**
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// CHECK: [[T_TO_P1_VAL:%.*]] = load i8*, i8** [[T_TO_P2]]
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// CHECK: [[T_TO_P1:%.*]] = bitcast i8* [[T_TO_P1_VAL]] to i8**
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// CHECK: [[WRAPPER_T_TYPE:%.*]] = bitcast %swift.type* [[WRAPPER_T:%.*]] to %swift.type**
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// CHECK: [[T_TYPE_PTR:%.*]] = getelementptr inbounds %swift.type*, %swift.type** [[WRAPPER_T_TYPE]], i64 2
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// CHECK: [[T_TYPE:%.*]] = load %swift.type*, %swift.type** [[T_TYPE_PTR]]
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// CHECK: [[T_B_TYPE_ACCESSOR_PTR:%.*]] = load i8*, i8** [[T_TO_P1]], align 8
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// CHECK: [[T_B_TYPE_ACCESSOR:%.*]] = bitcast i8* [[T_B_TYPE_ACCESSOR_PTR]] to %swift.type* (%swift.type*, i8**)*
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// CHECK: [[T_A_TYPE:%.*]] = call %swift.type* [[T_B_TYPE_ACCESSOR]](%swift.type* [[T_TYPE]], i8** [[T_TO_P1]])
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// CHECK: ret %swift.type* [[T_A_TYPE]]
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// associated type witness table accessor for A : P2 in Wrapper<T>: P2
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// CHECK-LABEL: define internal i8** @_T033conditional_conformance_recursive7WrapperVyxGAA2P2A2aERzrl1A_AaEPWT
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// CHECK: [[CONDITIONAL_REQ_BUFFER:%.*]] = alloca [1 x i8**]
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// CHECK: [[FIRST_REQ:%.*]] = getelementptr inbounds [1 x i8**], [1 x i8**]* [[CONDITIONAL_REQ_BUFFER]]
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// CHECK: call i8** @_T033conditional_conformance_recursive7WrapperVyxGAA2P2A2aERzrlWa(%swift.type* [[WRAPPER_TO_A:%.*]], i8*** [[FIRST_REQ]], i64 1)
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