test/IRGen/lazy_metadata.swift

// RUN: %target-swift-frontend -parse-as-library -module-name=test -O %s -emit-ir > %t.ll
// RUN: %FileCheck %s < %t.ll
// RUN: %FileCheck -check-prefix=CHECK-DEAD %s < %t.ll

// protocol descriptor for test.Proto
// CHECK-DAG: @"$S4test5ProtoMp" =
// CHECK-DAG: @"$S4test12PrivateProto{{[_A-Z0-9]*}}Mp" =

// reflection metadata field descriptors
// CHECK-DAG: @"$S4test7StructAVMF" =
// CHECK-DAG: @"$S4test7StructBVMF" =
// CHECK-DAG: @"$S4test7StructCVMF" =
// CHECK-DAG: @"$S4test7StructDVMF" =
// CHECK-DAG: @"$S4test7StructEVMF" =

// nominal type descriptors
// CHECK-DAG: @"$S4test7StructAVMn" =
// CHECK-DAG: @"$S4test7StructBVMn" =
// CHECK-DAG: @"$S4test7StructCVMn" =
// CHECK-DAG: @"$S4test7StructDVMn"
// CHECK-DAG: @"$S4test7StructEVMn" =

// full type metadata
// CHECK-DAG: @"$S4test7StructAVMf" =
// CHECK-DAG: @"$S4test7StructBVMf" =
// CHECK-DAG: @"$S4test7StructCVMf" =
// CHECK-DEAD-NOT: @"$S4test7StructDVMf"
// CHECK-DAG: @"$S4test7StructEVMf" =

// protocol witness tables
// CHECK-DAG: @"$S4test7StructAVAA5ProtoAAWP" =
// CHECK-DAG: @"$S4test7StructBVAA5ProtoAAWP" =
// CHECK-DAG: @"$S4test7StructCVAA5ProtoAAWP" =
// CHECK-DEAD-NOT: @"$S4test7StructDVAA5ProtoAAWP" =
// CHECK-DAG: @"$S4test7StructEVAA12PrivateProto{{[_A-Z0-9]*}}AAWP" =

public protocol Proto {
  func abc()
}

struct StructA : Proto {
  func abc() {
  }
}

struct StructB : Proto {
  func abc() {
  }
}

struct StructC : Proto {
  func abc() {
  }
}

// This is the only struct for which no metadata and conformances are needed.
struct StructD : Proto {
  func abc() {
  }
}

private protocol PrivateProto {
  func xyz()
}

public struct StructE : PrivateProto {
  func xyz() {
  }
}

public func needPrivateConformance(_ x: Any) -> Bool {
  return x is PrivateProto
}

@inline(never)
@_optimize(none)
func consume1<T>(_ t: T) {
}

@inline(never)
@_optimize(none)
func consume2<T: Proto>(_ t: T) {
  t.abc()
}
@inline(never)
@_optimize(none)
func consume3(_ p: Proto) {
  p.abc()
}
@inline(never)
@_optimize(none)
func consume4(_ t: StructD) {
  t.abc()
}

var a = StructA()
var b = StructB()
var c = StructC()
var d = StructD()

public func callfuncA() {
  consume1(a)
}

public func callfuncB() {
  consume2(b)
}

public func callfuncC() {
  consume3(c)
}

public func callfuncD() {
  consume4(d)
}