// RUN: %target-swift-frontend -emit-ir %s | FileCheck %s

// REQUIRES: CPU=x86_64
// REQUIRES: objc_interop

import Builtin
import Swift

// CHECK: [[REF:%swift.refcounted]] = type
// CHECK: [[TYPE:%swift.type]] = type
// CHECK: [[OBJCCLASS:%objc_class]] = type
// CHECK: [[OPAQUE:%swift.opaque]] = type opaque
// CHECK: [[C_CLASS:%C5class1C]] = type
// CHECK: [[OBJCOBJ:%objc_object]] = type

class C {}
sil_vtable C {}

// <rdar://14812566>: include _Tt prefix here
//   CHECK: [[C_NAME:@.*]] = private unnamed_addr constant [13 x i8] c"_TtC5class1C\00"

//   CHECK: @_DATA__TtC5class1C = private constant {{.*}} {
// \ CHECK:   i32 128,
// \ CHECK:   i32 16,
// \ CHECK:   i32 16,
// \ CHECK:   i32 0,
// \ CHECK:   i8* null,
// \ CHECK:   i8* getelementptr inbounds ([13 x i8], [13 x i8]* [[C_NAME]], i64 0, i64 0),
// \ CHECK:   i8* null,
// \ CHECK:   i8* null,
// \ CHECK:   i8* null,
// \ CHECK:   i8* null,
// \ CHECK:   i8* null
// \ CHECK: }

//   CHECK: @_TMfC5class1C = internal global <{ {{.*}} }> <{
// \ CHECK:   void ([[C_CLASS]]*)* @_TFC5class1CD,
// \ CHECK:   i8** @_TWVBo,
// \ CHECK:   i64 ptrtoint ([[OBJCCLASS]]* @_TMmC5class1C to i64),
// \ CHECK:   [[OBJCCLASS]]* @"OBJC_CLASS_$_SwiftObject",
// \ CHECK:   [[OPAQUE]]* @_objc_empty_cache,
// \ CHECK:   [[OPAQUE]]* null,
// \ CHECK:   i64 add (i64 ptrtoint ({{.*}}* @_DATA__TtC5class1C to i64), i64 1)
// \ CHECK: }>

// Destroying destructor
// CHECK: define{{( protected)?}} [[REF]]* @_TFC5class1Cd([[C_CLASS]]*) {{.*}} {
// CHECK-NEXT: entry:
// CHECK-NEXT: [[OBJ_PTR:%[a-zA-Z0-9]+]] = bitcast [[C_CLASS]]* %0 to [[REF]]*
// CHECK-NEXT: ret [[REF]]* [[OBJ_PTR]]
sil @_TFC5class1Cd : $@convention(method) (@owned C) -> @owned Builtin.NativeObject {
bb0(%0 : $C):
  %1 = unchecked_ref_cast %0 : $C to $Builtin.NativeObject // user: %2
  return %1 : $Builtin.NativeObject              // id: %2
}

// Deallocating destructor
// CHECK: define{{( protected)?}} void @_TFC5class1CD([[C_CLASS]]*)
sil @_TFC5class1CD : $@convention(method) (@owned C) -> () {
bb0(%0 : $C):
  // CHECK-NEXT: entry
  // CHECK-NEXT: [[SELF:%[a-zA-Z0-9]+]] = call [[REF]]* @_TFC5class1Cd([[C_CLASS]]* %0)
  // CHECK-NEXT: [[SELF_OBJ:%[a-zA-Z0-9]+]] = bitcast [[REF]]* [[SELF]] to [[C_CLASS]]*
  %1 = function_ref @_TFC5class1Cd : $@convention(method) (@owned C) -> @owned Builtin.NativeObject // user: %2
  %2 = apply %1(%0) : $@convention(method) (@owned C) -> @owned Builtin.NativeObject // user: %3
  %3 = unchecked_ref_cast %2 : $Builtin.NativeObject to $C // user: %4
  // CHECK-NEXT: [[SELF:%[a-zA-Z0-9]+]] = bitcast [[C_CLASS]]* [[SELF_OBJ]] to [[REF]]*
  // CHECK-NEXT: call void @swift_deallocClassInstance([[REF]]* [[SELF]], i64 16, i64 7)
  dealloc_ref %3 : $C                             // id: %4
  // CHECK-NEXT: ret void   
  %5 = tuple ()                                   // user: %6
  return %5 : $()                                 // id: %6
}

// CHECK: define{{( protected)?}} [[REF]]* @unchecked_ref_cast_cast([[C_CLASS]]*)
// CHECK:   bitcast [[C_CLASS]]* {{%.*}} to [[REF]]*
sil @unchecked_ref_cast_cast : $@convention(thin) C -> Builtin.NativeObject {
entry(%c : $C):
  %r = unchecked_ref_cast %c : $C to $Builtin.NativeObject
  return %r : $Builtin.NativeObject
}

// CHECK: define{{( protected)?}} [[OBJCOBJ]]* @ref_to_objc_pointer_cast([[C_CLASS]]*)
// CHECK:   bitcast [[C_CLASS]]* %0 to [[OBJCOBJ]]*
sil @ref_to_objc_pointer_cast : $@convention(thin) C -> Builtin.UnknownObject {
entry(%c : $C):
  %r = unchecked_ref_cast %c : $C to $Builtin.UnknownObject
  return %r : $Builtin.UnknownObject
}

// CHECK-LABEL: define{{( protected)?}} %C5class1C* @alloc_ref_dynamic(%swift.type*)
sil @alloc_ref_dynamic : $@convention(thin) (@thick C.Type) -> @owned C {
bb0(%0 : $@thick C.Type):
  // CHECK:   [[META_PTR:%[0-9]+]] = bitcast %swift.type* %0 to i8*
  // CHECK:   [[T0:%.*]] = getelementptr inbounds i8, i8* [[META_PTR]], i32 48
  // CHECK:   [[T1:%.*]] = bitcast i8* [[T0]] to i32*
  // CHECK:   [[SIZE32:%.*]] = load i32, i32* [[T1]], align 8
  // CHECK:   [[SIZE:%.*]] = zext i32 [[SIZE32]] to i64
  // CHECK:   [[T0:%.*]] = getelementptr inbounds i8, i8* [[META_PTR]], i32 52
  // CHECK:   [[T1:%.*]] = bitcast i8* [[T0]] to i32*
  // CHECK:   [[ALIGN32:%.*]] = load i32, i32* [[T1]], align 4
  // CHECK:   [[ALIGN:%.*]] = zext i32 [[ALIGN32]] to i64
  // CHECK:   [[RESULT:%[0-9]+]] = call noalias %swift.refcounted* @rt_swift_allocObject(%swift.type* %0, i64 [[SIZE]], i64 [[ALIGN]])
  %1 = alloc_ref_dynamic %0 : $@thick C.Type, $C
  return %1 : $C
}

// CHECK-LABEL: define{{( protected)?}} %C5class1C* @autorelease(%C5class1C*) {{.*}} {
// CHECK:         %1 = bitcast %C5class1C* %0 to %objc_object*
// CHECK:         call %objc_object* @objc_autorelease(%objc_object* %1)
// CHECK:         ret %C5class1C* %0
sil @autorelease : $@convention(thin) (@owned C) -> C {
entry(%c : $C):
  autorelease_value %c : $C
  return %c : $C
}

// CHECK-LABEL: define{{( protected)?}} i64 @autorelease_optional(i64) {{.*}} {
// CHECK:         %1 = inttoptr i64 %0 to %objc_object*
// CHECK:         call %objc_object* @objc_autorelease(%objc_object* %1)
// CHECK:         ret i64 %0
sil @autorelease_optional : $@convention(thin) (@owned C?) -> C? {
entry(%c : $C?):
  autorelease_value %c : $C?
  return %c : $C?
}

// rdar://problem/19514920

class NonRequiredBase {}
class RequiredBase: NonRequiredBase {
  required override init()
}

sil public_external @init_NonRequiredBase : $@convention(method) (@owned NonRequiredBase) -> @owned NonRequiredBase
sil public_external @alloc_RequiredBase : $@convention(thin) (@thick RequiredBase.Type) -> @owned RequiredBase
sil public_external @init_RequiredBase : $@convention(method) (@owned RequiredBase) -> @owned RequiredBase

sil_vtable NonRequiredBase {
  #NonRequiredBase.init!initializer.1: init_NonRequiredBase
}

sil_vtable RequiredBase {
  #NonRequiredBase.init!initializer.1: init_RequiredBase
  #RequiredBase.init!allocator.1: alloc_RequiredBase
}

// rdar://problem/19902523

protocol ClassConstraint: class {}
class ClassConstraintConformance: ClassConstraint {}
sil_vtable ClassConstraintConformance {}

class ClassConstrainedGenericField<T: ClassConstraint> {
  var field: T
  init()
}
sil_vtable ClassConstrainedGenericField {}

sil @fixed_class_generic_field : $@convention(thin) (@owned ClassConstrainedGenericField<ClassConstraintConformance>) -> @owned ClassConstraintConformance {
entry(%x : $ClassConstrainedGenericField<ClassConstraintConformance>):
  %a = ref_element_addr %x : $ClassConstrainedGenericField<ClassConstraintConformance>, #ClassConstrainedGenericField.field
  %b = load %a : $*ClassConstraintConformance
  return %b : $ClassConstraintConformance
}
// CHECK-LABEL: define{{( protected)?}} %C5class26ClassConstraintConformance* @fixed_class_generic_field(%C5class28ClassConstrainedGenericField*)
// CHECK:         [[FIELD_ADDR_GENERIC:%.*]] = getelementptr inbounds %C5class28ClassConstrainedGenericField, %C5class28ClassConstrainedGenericField* %0, i32 0, i32 1
// CHECK:         [[FIELD_ADDR_CONCRETE:%.*]] = bitcast %objc_object** [[FIELD_ADDR_GENERIC]] to %C5class26ClassConstraintConformance**
// CHECK:         load %C5class26ClassConstraintConformance*, %C5class26ClassConstraintConformance** [[FIELD_ADDR_CONCRETE]]