test/IRGen/associated_types.swift

// RUN: %target-swift-frontend -emit-ir -primary-file %s | %FileCheck %s -DINT=i%target-ptrsize

// REQUIRES: CPU=i386 || CPU=x86_64

protocol Runcer {
  associatedtype Runcee
}

protocol Runcible {
  associatedtype RuncerType : Runcer
  associatedtype AltRuncerType : Runcer
}

struct Mince {}

struct Quince : Runcer {
  typealias Runcee = Mince
}

struct Spoon : Runcible {
  typealias RuncerType = Quince
  typealias AltRuncerType = Quince
}

struct Owl<T : Runcible, U> {
  // CHECK: define hidden swiftcc void @"$s16associated_types3OwlV3eat{{[_0-9a-zA-Z]*}}F"(%swift.opaque*
  func eat(_ what: T.RuncerType.Runcee, and: T.RuncerType, with: T) { }
}

class Pussycat<T : Runcible, U> {
  init() {} 

  // CHECK: define hidden swiftcc void @"$s16associated_types8PussycatC3eat{{[_0-9a-zA-Z]*}}F"(%swift.opaque* noalias nocapture, %swift.opaque* noalias nocapture, %swift.opaque* noalias nocapture, %T16associated_types8PussycatC* swiftself)
  func eat(_ what: T.RuncerType.Runcee, and: T.RuncerType, with: T) { }
}

func owl() -> Owl<Spoon, Int> {
  return Owl()
}

func owl2() {
  Owl<Spoon, Int>().eat(Mince(), and: Quince(), with: Spoon())
}


func pussycat() -> Pussycat<Spoon, Int> {
  return Pussycat()
}

func pussycat2() {
  Pussycat<Spoon, Int>().eat(Mince(), and: Quince(), with: Spoon())
}

protocol Speedy {
  static func accelerate()
}
protocol FastRuncer {
  associatedtype Runcee : Speedy
}

protocol FastRuncible {
  associatedtype RuncerType : FastRuncer
}

// This is a complex example demonstrating the need to pull conformance
// information for archetypes from all paths to that archetype, not just
// its parent relationships.

func testFastRuncible<T: Runcible, U: FastRuncible>(_ t: T, u: U)
   where T.RuncerType == U.RuncerType {
  U.RuncerType.Runcee.accelerate()
}

// CHECK: define hidden swiftcc void @"$s16associated_types16testFastRuncible_1uyx_q_tAA0E0RzAA0dE0R_10RuncerTypeQy_AFRtzr0_lF"(%swift.opaque* noalias nocapture, %swift.opaque* noalias nocapture, %swift.type* %T, %swift.type* %U, i8** %T.Runcible, i8** %U.FastRuncible) #0 {
//   1. Get the type metadata for U.RuncerType.Runcee.
//     1a. Get the type metadata for U.RuncerType.
//         Note that we actually look things up in T, which is going to prove unfortunate.
// CHECK: [[T2:%.*]] = call swiftcc %swift.metadata_response @swift_getAssociatedTypeWitness([[INT]] 0, i8** %T.Runcible, %swift.type* %T, %swift.protocol_requirement* getelementptr{{.*}}i32 12), i32 -1), %swift.protocol_requirement* getelementptr inbounds (<{{.*}}>, <{{.*}}>* @"$s16associated_types8RuncibleMp", i32 0, i32 14)) [[NOUNWIND_READNONE:#.*]]
// CHECK-NEXT: %T.RuncerType = extractvalue %swift.metadata_response [[T2]], 0
//   2. Get the witness table for U.RuncerType.Runcee : Speedy
//     2a. Get the protocol witness table for U.RuncerType : FastRuncer.
// CHECK-NEXT: %T.RuncerType.FastRuncer = call swiftcc i8** @swift_getAssociatedConformanceWitness(i8** %U.FastRuncible, %swift.type* %U, %swift.type* %T.RuncerType
//     1c. Get the type metadata for U.RuncerType.Runcee.
// CHECK-NEXT: [[T2:%.*]] = call swiftcc %swift.metadata_response @swift_getAssociatedTypeWitness([[INT]] 0, i8** %T.RuncerType.FastRuncer, %swift.type* %T.RuncerType, {{.*}}, %swift.protocol_requirement* getelementptr inbounds (<{{.*}}>, <{{.*}}>* @"$s16associated_types10FastRuncerMp", i32 0, i32 10))
// CHECK-NEXT: %T.RuncerType.Runcee = extractvalue %swift.metadata_response [[T2]], 0
//     2b. Get the witness table for U.RuncerType.Runcee : Speedy.
// CHECK-NEXT: %T.RuncerType.Runcee.Speedy = call swiftcc i8** @swift_getAssociatedConformanceWitness(i8** %T.RuncerType.FastRuncer, %swift.type* %T.RuncerType, %swift.type* %T.RuncerType.Runcee
//   3. Perform the actual call.
// CHECK-NEXT: [[T0_GEP:%.*]] = getelementptr inbounds i8*, i8** %T.RuncerType.Runcee.Speedy, i32 1
// CHECK-NEXT: [[T0:%.*]] = load i8*, i8** [[T0_GEP]]
// CHECK-NEXT: [[T1:%.*]] = bitcast i8* [[T0]] to void (%swift.type*, %swift.type*, i8**)*
// CHECK-NEXT: call swiftcc void [[T1]](%swift.type* swiftself %T.RuncerType.Runcee, %swift.type* %T.RuncerType.Runcee, i8** %T.RuncerType.Runcee.Speedy)

public protocol P0 {
  associatedtype ErrorType : Swift.Error
}

public struct P0Impl : P0 {
  public typealias ErrorType = Swift.Error
}

// CHECK: define{{.*}} swiftcc i8** @"$s16associated_types6P0ImplVAA0C0AA9ErrorTypeAaDP_s0E0PWT"(%swift.type* %P0Impl.ErrorType, %swift.type* %P0Impl, i8** %P0Impl.P0)
// CHECK:  ret i8** @"$ss5ErrorWS"

// CHECK: attributes [[NOUNWIND_READNONE]] = { nounwind readnone }