// RUN: %target-sil-opt -enable-sil-verify-all %s -sil-combine | FileCheck %s

// REQUIRES: objc_interop

// TODO: Update optimizer for id-as-Any changes.

sil_stage canonical

import Builtin
import Swift
import Foundation

// FIXME: Should go into the standard library.
public extension _ObjectiveCBridgeable {
  static func _unconditionallyBridgeFromObjectiveC(_ source: _ObjectiveCType?)
      -> Self
}

class AnNSArray {
}

struct AnArray<T> : _ObjectiveCBridgeable {
  @sil_stored var Buffer : Builtin.NativeObject

  func _bridgeToObjectiveC() -> AnNSArray {
    return AnNSArray()
  }
  static func _forceBridgeFromObjectiveC(
    _ x: AnNSArray,
    result: inout AnArray?
  ) {
    _preconditionFailure("implement")
  }
  static func _conditionallyBridgeFromObjectiveC(
    _ x: AnNSArray,
    result: inout AnArray?
  ) -> Bool {
    _preconditionFailure("implement")
  }
}

sil [_semantics "convertFromObjectiveC"] @bridgeFromObjectiveC :
  $@convention(thin) <τ_0_0> (@owned AnNSArray) -> @owned AnArray<τ_0_0>

sil [_semantics "convertToObjectiveC"] @bridgeToObjectiveC:
  $@convention(method) <τ_0_0> (@owned AnArray<τ_0_0>) -> @owned AnNSArray

// CHECK-LABEL: sil @bridge_from_to_owned
// CHECK-NOT: apply
// CHECK: strong_retain
// CHECK-NOT: apply
// CHECK: strong_release
// CHECK-NOT: apply
// CHECK: return

sil @bridge_from_to_owned : $@convention(thin) (@owned AnNSArray) -> @owned AnNSArray {
bb0(%0 : $AnNSArray):
  %1 = function_ref @bridgeFromObjectiveC : $@convention(thin) <AnyObject> (@owned AnNSArray) -> @owned AnArray<AnyObject>
  %2 = apply %1<AnyObject>(%0) : $@convention(thin) <AnyObject> (@owned AnNSArray) -> @owned AnArray<AnyObject>
  retain_value %2 : $AnArray<AnyObject>
  release_value %2 : $AnArray<AnyObject>
  %3 = function_ref @bridgeToObjectiveC : $@convention(method) <AnyObject> (@owned AnArray<AnyObject>) -> @owned AnNSArray
  %4 = apply %3<AnyObject>(%2) : $@convention(method) <AnyObject> (@owned AnArray<AnyObject>) -> @owned AnNSArray
  return %4 : $AnNSArray
}

// CHECK-LABEL: sil @bridge_to_from_owned
// CHECK-NOT: apply
// CHECK: retain_value
// CHECK-NOT: apply
// CHECK: release_value
// CHECK-NOT: apply
// CHECK: return

sil @bridge_to_from_owned : $@convention(thin) (@owned AnArray<AnyObject>) -> @owned AnArray<AnyObject>{
bb0(%0 : $AnArray<AnyObject>):
  %1 = function_ref @bridgeToObjectiveC : $@convention(method) <AnyObject> (@owned AnArray<AnyObject>) -> @owned AnNSArray
  %2 = apply %1<AnyObject>(%0) : $@convention(method) <AnyObject> (@owned AnArray<AnyObject>) -> @owned AnNSArray
  debug_value %2 : $AnNSArray    // should not prevent the optimization
  strong_retain %2 : $AnNSArray
  strong_release %2 : $AnNSArray
  %3 = function_ref @bridgeFromObjectiveC : $@convention(thin) <AnyObject> (@owned AnNSArray) -> @owned AnArray<AnyObject>
  %4 = apply %3<AnyObject>(%2) : $@convention(thin) <AnyObject> (@owned AnNSArray) -> @owned AnArray<AnyObject>
  return %4 : $AnArray<AnyObject>
}

sil [_semantics "convertFromObjectiveC"] @bridgeFromObjectiveCGuaranteed :
  $@convention(thin) <τ_0_0> (@guaranteed AnNSArray) -> @owned AnArray<τ_0_0>

sil [_semantics "convertToObjectiveC"] @bridgeToObjectiveCGuaranteed:
  $@convention(method) <τ_0_0> (@guaranteed AnArray<τ_0_0>) -> @owned AnNSArray

// CHECK-LABEL: sil @bridge_from_to_guaranteed
// CHECK-NOT: apply
// CHECK: strong_retain
// CHECK-NOT: apply
// CHECK: strong_release
// CHECK-NOT: apply
// CHECK: return

sil @bridge_from_to_guaranteed : $@convention(thin) (@owned AnNSArray) -> @owned AnNSArray {
bb0(%0 : $AnNSArray):
  %1 = function_ref @bridgeFromObjectiveCGuaranteed : $@convention(thin) <AnyObject> (@guaranteed AnNSArray) -> @owned AnArray<AnyObject>
  %2 = apply %1<AnyObject>(%0) : $@convention(thin) <AnyObject> (@guaranteed AnNSArray) -> @owned AnArray<AnyObject>
  release_value %0 : $AnNSArray
  %3 = function_ref @bridgeToObjectiveCGuaranteed : $@convention(method) <AnyObject> (@guaranteed AnArray<AnyObject>) -> @owned AnNSArray
  %4 = apply %3<AnyObject>(%2) : $@convention(method) <AnyObject> (@guaranteed AnArray<AnyObject>) -> @owned AnNSArray
  release_value %2 : $AnArray<AnyObject>
  return %4 : $AnNSArray
}

// CHECK-LABEL: sil @bridge_to_from_guaranteed
// CHECK-NOT: apply
// CHECK: retain_value
// CHECK-NOT: apply
// CHECK: release_value
// CHECK-NOT: apply
// CHECK: return

sil @bridge_to_from_guaranteed : $@convention(thin) (@owned AnArray<AnyObject>) -> @owned AnArray<AnyObject>{
bb0(%0 : $AnArray<AnyObject>):
  %1 = function_ref @bridgeToObjectiveCGuaranteed : $@convention(method) <AnyObject> (@guaranteed AnArray<AnyObject>) -> @owned AnNSArray
  %2 = apply %1<AnyObject>(%0) : $@convention(method) <AnyObject> (@guaranteed AnArray<AnyObject>) -> @owned AnNSArray
  release_value %0 : $AnArray<AnyObject>
  %3 = function_ref @bridgeFromObjectiveCGuaranteed : $@convention(thin) <AnyObject> (@guaranteed AnNSArray) -> @owned AnArray<AnyObject>
  %4 = apply %3<AnyObject>(%2) : $@convention(thin) <AnyObject> (@guaranteed AnNSArray) -> @owned AnArray<AnyObject>
  release_value %2 : $AnNSArray
  return %4 : $AnArray<AnyObject>
}

struct PlainStruct {
}

// CHECK-LABEL: sil @plain_struct_bridge_from_to_owned
// CHECK-NOT: apply
// CHECK-NOT: apply
// CHECK: return
sil @plain_struct_bridge_from_to_owned : $@convention(thin) (@owned AnNSArray) -> @owned AnNSArray {
bb0(%0 : $AnNSArray):
  %1 = function_ref @bridgeFromObjectiveC : $@convention(thin) <PlainStruct> (@owned AnNSArray) -> @owned AnArray<PlainStruct>
  %2 = apply %1<PlainStruct>(%0) : $@convention(thin) <PlainStruct> (@owned AnNSArray) -> @owned AnArray<PlainStruct>
  retain_value %2 : $AnArray<PlainStruct>
  release_value %2 : $AnArray<PlainStruct>
  %3 = function_ref @bridgeToObjectiveC : $@convention(method) <PlainStruct> (@owned AnArray<PlainStruct>) -> @owned AnNSArray
  %4 = apply %3<PlainStruct>(%2) : $@convention(method) <PlainStruct> (@owned AnArray<PlainStruct>) -> @owned AnNSArray
  return %4 : $AnNSArray
}

// CHECK-LABEL: sil @plain_struct_bridge_from_to_owned_generic
// CHECK-NOT: apply
// CHECK-NOT: apply
// CHECK: return

sil @plain_struct_bridge_from_to_owned_generic : $@convention(thin) <T>(@owned AnNSArray) -> @owned AnNSArray {
bb0(%0 : $AnNSArray):
  %1 = function_ref @bridgeFromObjectiveC : $@convention(thin) <T2> (@owned AnNSArray) -> @owned AnArray<T2>
  %2 = apply %1<T>(%0) : $@convention(thin) <T2> (@owned AnNSArray) -> @owned AnArray<T2>
  retain_value %2 : $AnArray<T>
  release_value %2 : $AnArray<T>
  %3 = function_ref @bridgeToObjectiveC : $@convention(method) <T2> (@owned AnArray<T2>) -> @owned AnNSArray
  %4 = apply %3<T>(%2) : $@convention(method) <T> (@owned AnArray<T>) -> @owned AnNSArray
  return %4 : $AnNSArray
}

// CHECK-LABEL: sil @plain_struct_from_to_owned_recursive_type
// CHECK-NOT: apply
// CHECK-NOT: apply
// CHECK: return

sil @plain_struct_from_to_owned_recursive_type : $@convention(thin) (@owned AnNSArray) -> @owned AnNSArray {
bb0(%0 : $AnNSArray):
  %1 = function_ref @bridgeFromObjectiveC : $@convention(thin) <T> (@owned AnNSArray) -> @owned AnArray<T>
  %2 = apply %1<AnArray<PlainStruct>>(%0) : $@convention(thin) <T> (@owned AnNSArray) -> @owned AnArray<T>
  retain_value %2 : $AnArray<AnArray<PlainStruct>>
  release_value %2 : $AnArray<AnArray<PlainStruct>>
  %3 = function_ref @bridgeToObjectiveC : $@convention(method) <T> (@owned AnArray<T>) -> @owned AnNSArray
  %4 = apply %3<AnArray<PlainStruct>>(%2) : $@convention(method) <T> (@owned AnArray<T>) -> @owned AnNSArray
  return %4 : $AnNSArray
}

// CHECK-LABEL: sil shared @bridge_from_swift_array_to_NSObject_cast
// CHECK: function_ref @_TFE10FoundationSa19_bridgeToObjectiveC
// CHECK-NOT: retain
// CHECK: apply
// CHECK: release_value
// CHECK: upcast %{{.*}} : $NSArray to $NSObject
// CHECK: store
// CHECK: return
sil shared @bridge_from_swift_array_to_NSObject_cast: $@convention(thin) (@in Array<String>) -> @out NSObject {
bb0(%0 : $*NSObject, %1 : $*Array<String>):
  %2 = alloc_stack $Array<String>
  copy_addr %1 to [initialization] %2 : $*Array<String>
  unconditional_checked_cast_addr take_always Array<String> in %2 : $*Array<String> to NSObject in %0 : $*NSObject
  dealloc_stack %2 : $*Array<String>
  destroy_addr %1 : $*Array<String>
  %7 = tuple ()
  return %7 : $()
}