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66 lines
2.6 KiB
Swift
66 lines
2.6 KiB
Swift
// RUN: %target-swift-frontend -emit-sil %s -enable-experimental-feature TupleConformances | %FileCheck %s
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// Required for experimental features
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// REQUIRES: asserts
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public typealias Tuple<each T> = (repeat each T)
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public protocol P {
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static func protocolMethod()
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}
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extension Tuple: P where repeat each T: P {
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public static func protocolMethod() {}
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}
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extension Int: P {
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public static func protocolMethod() {}
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}
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public func callee<T: P>(t: T.Type) {
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}
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@_transparent
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public func transparentCallee<T: P>(t: T.Type) {
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t.protocolMethod()
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}
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// Make sure we don't devirtualize the call when we inline transparentCallee()
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// into transparentCaller(), because we might unwrap the tuple conformance
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// later.
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// CHECK-LABEL: sil [transparent] @$s4main17transparentCaller5tupleyxxQp_tm_tRvzAA1PRzlF : $@convention(thin) <each T where repeat each T : P> (@thin (repeat each T).Type) -> () {
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@_transparent public func transparentCaller<each T: P>(tuple: (repeat each T).Type) {
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callee(t: tuple)
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// CHECK: [[FN:%.*]] = witness_method $(repeat each T), #P.protocolMethod : <Self where Self : P> (Self.Type) -> () -> () : $@convention(witness_method: P) <τ_0_0 where τ_0_0 : P> (@thick τ_0_0.Type) -> ()
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// CHECK: apply [[FN:%.*]]<(repeat each T)>({{.*}})
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transparentCallee(t: tuple)
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// FIXME: This one is wrong in the AST
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tuple.protocolMethod()
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}
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// Inlining transparentCaller() into caller() exercises the code path to unwrap
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// a one-element tuple conformance.
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public func caller() {
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transparentCaller(tuple: Int.self)
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}
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// CHECK-LABEL: sil @$s4main6calleryyF : $@convention(thin) () -> () {
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// CHECK: [[FN:%.*]] = function_ref @$s4main6callee1tyxm_tAA1PRzlF : $@convention(thin) <τ_0_0 where τ_0_0 : P> (@thick τ_0_0.Type) -> ()
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// CHECK: apply [[FN]]<Int>({{.*}}) : $@convention(thin) <τ_0_0 where τ_0_0 : P> (@thick τ_0_0.Type) -> ()
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// Make sure the witness method call in transparentCallee() was devirtualized to Int.protocolMethod().
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// CHECK: [[FN:%.*]] = function_ref @$sSi4mainE14protocolMethodyyFZ : $@convention(method) (@thin Int.Type) -> () // user: %6
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// CHECK: apply [[FN]]({{.*}}) : $@convention(method) (@thin Int.Type) -> ()
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// FIXME: This is the `tuple.protocolMethod()` in transparentCaller(). It should
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// also refer to Int.protocolMethod()!
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// CHECK: [[FN:%.*]] = function_ref @$sBT4mainRvzAA1PRzlE14protocolMethodyyFZ : $@convention(method) <each τ_0_0 where repeat each τ_0_0 : P> (@thin (repeat each τ_0_0).Type) -> ()
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// CHECK: apply [[FN]]<Pack{Int}>({{.*}}) : $@convention(method) <each τ_0_0 where repeat each τ_0_0 : P> (@thin (repeat each τ_0_0).Type) -> ()
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