// RUN: %target-swift-frontend -assume-parsing-unqualified-ownership-sil %s -gnone -emit-ir | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize

// REQUIRES: CPU=x86_64

import Builtin

enum NoPayload {
  case a
  case b
  case c
}

enum SingletonPayload {
  case S(Builtin.Int64, Builtin.Int64)
}

enum SinglePayloadTrivial {
  case payload(Builtin.Int64)
  case a
  case b
  case c
}

enum SinglePayloadNontrivial {
  case payload(Builtin.NativeObject)
  case a
  case b
  case c
}

sil @single_payload_nontrivial_user : $@convention(thin) (@owned SinglePayloadNontrivial) -> ()

enum MultiPayloadTrivial {
  case payload1(Builtin.Int64)
  case payload2(Builtin.Int32, Builtin.Int32)
  case a
  case b
  case c
}

enum MultiPayloadNoEmptyCases {
  case payload1(Builtin.Int64)
  case payload2(Builtin.Int32, Builtin.Int32)
}

enum MultiPayloadEmptyPayload {
  case payload1()
  case payload2()
  case a
  case b
  case c
}

// No spare bits
enum MultiPayloadNontrivial {
  case payload1(Builtin.NativeObject)
  case payload2(Builtin.Int64)
  case payload3(Builtin.Int64, Builtin.UnknownObject)
  case payload4(Builtin.Int64, Builtin.Int64)
  case a
  case b
  case c
}

enum MultiPayloadGeneric<T> {
  case payload1(T)
  case payload2(T)
  case a
  case b
  case c
}

// Most significant bits of second 64-bit word of payload
// are spare bits
enum MultiPayloadNontrivialSpareBits {
  case payload1(Builtin.NativeObject)
  case payload2(Builtin.Int64)
  case payload3(Builtin.Int64, Builtin.UnknownObject)
  case a
  case b
  case c
}

// We only have 1 spare bit but 3 payload cases
enum MultiPayloadSpareBitsAndExtraBits {
  case payload1(Builtin.Int63)
  case payload2(Builtin.NativeObject)
  case payload3(Builtin.NativeObject)
}

enum GenericFixedLayout<T> {
  case foo(Builtin.Int64)
  case bar(Builtin.NativeObject)
}


// CHECK-LABEL: @_T020enum_value_semantics20SinglePayloadTrivialOWV = internal constant [18 x i8*] [
// CHECK:   i8* bitcast (i8* (i8*, i8*, %swift.type*)* @__swift_memcpy9_8 to i8*),
// CHECK:   i8* bitcast (void (i8*, %swift.type*)* @__swift_noop_void_return to i8*),
// CHECK:   i8* bitcast (i8* (i8*, i8*, %swift.type*)* @__swift_memcpy9_8 to i8*),
// CHECK:   i8* bitcast (i8* (i8*, i8*, %swift.type*)* @__swift_memcpy9_8 to i8*),
// CHECK:   i8* bitcast (i8* (i8*, i8*, %swift.type*)* @__swift_memcpy9_8 to i8*),
// CHECK:   i8* bitcast (i8* (i8*, i8*, %swift.type*)* @__swift_memcpy9_8 to i8*),
// CHECK:   i8* bitcast (i8* (i8*, i8*, %swift.type*)* @__swift_memcpy9_8 to i8*),
// CHECK:   i8* bitcast (i32 (%swift.opaque*, i32, %swift.type*)* @_T020enum_value_semantics20SinglePayloadTrivialOwet to i8*),
// CHECK:   i8* bitcast (void (%swift.opaque*, i32, i32, %swift.type*)* @_T020enum_value_semantics20SinglePayloadTrivialOwst to i8*),
// CHECK:   i8* inttoptr (i64 9 to i8*),
// CHECK:   i8* inttoptr (i64 2097159 to i8*),
// CHECK:   i8* inttoptr (i64 16 to i8*),
// CHECK:   i8* null,
// CHECK:   i8* null,
// CHECK:   i8* null,
// CHECK:   i8* bitcast (i32 (%swift.opaque*, %swift.type*)* @_T020enum_value_semantics20SinglePayloadTrivialOwug to i8*),
// CHECK:   i8* bitcast (void (%swift.opaque*, %swift.type*)* @_T020enum_value_semantics20SinglePayloadTrivialOwup to i8*),
// CHECK:   i8* bitcast (void (%swift.opaque*, i32, %swift.type*)* @_T020enum_value_semantics20SinglePayloadTrivialOwui to i8*)
// CHECK: ]


// CHECK-LABEL: @_T020enum_value_semantics20SinglePayloadTrivialOMf =
// CHECK-SAME:   internal constant <{ {{.*}} }> <{
// CHECK-SAME:   i8** getelementptr inbounds ([18 x i8*], [18 x i8*]* @_T020enum_value_semantics20SinglePayloadTrivialOWV, i32 0, i32 0),
// CHECK-SAME:   i64 2,
// CHECK-SAME:   {{.*}}* @_T020enum_value_semantics20SinglePayloadTrivialOMn
// CHECK-SAME: }>


// CHECK-LABEL: @_T020enum_value_semantics23SinglePayloadNontrivialOWV = internal constant [18 x i8*] [
// CHECK:   i8* bitcast (%swift.opaque* ([24 x i8]*, [24 x i8]*, %swift.type*)* @_T020enum_value_semantics23SinglePayloadNontrivialOwCP to i8*),
// CHECK:   i8* bitcast (void (%swift.opaque*, %swift.type*)* @_T020enum_value_semantics23SinglePayloadNontrivialOwxx to i8*),
// CHECK:   i8* bitcast (%swift.opaque* (%swift.opaque*, %swift.opaque*, %swift.type*)* @_T020enum_value_semantics23SinglePayloadNontrivialOwcp to i8*),
// CHECK:   i8* bitcast (%swift.opaque* (%swift.opaque*, %swift.opaque*, %swift.type*)* @_T020enum_value_semantics23SinglePayloadNontrivialOwca to i8*),
// CHECK:   i8* bitcast (i8* (i8*, i8*, %swift.type*)* @__swift_memcpy8_8 to i8*),
// CHECK:   i8* bitcast (%swift.opaque* (%swift.opaque*, %swift.opaque*, %swift.type*)* @_T020enum_value_semantics23SinglePayloadNontrivialOwta to i8*),
// CHECK:   i8* inttoptr (i64 8 to i8*),
// --                         0x250007
// CHECK:   i8* inttoptr (i64 2424839 to i8*),
// CHECK:   i8* inttoptr (i64 8 to i8*),
// --                         on Darwin, first 4GB are unmapped: 0x7ffffffc
// --                         on Linux, only safe to assume first 4KB: 0x7fd
// CHECK:   i8* inttoptr (i64 {{2045|2147483644}} to i8*)
// CHECK:   i8* bitcast (void (%swift.opaque*, i32, %swift.type*)* @_T020enum_value_semantics23SinglePayloadNontrivialOwxs to i8*)
// CHECK:   i8* bitcast (i32 (%swift.opaque*, %swift.type*)* @_T020enum_value_semantics23SinglePayloadNontrivialOwxg to i8*)
// CHECK:   i8* bitcast (i32 (%swift.opaque*, %swift.type*)* @_T020enum_value_semantics23SinglePayloadNontrivialOwug to i8*),
// CHECK:   i8* bitcast (void (%swift.opaque*, %swift.type*)* @_T020enum_value_semantics23SinglePayloadNontrivialOwup to i8*)
// CHECK:   i8* bitcast (void (%swift.opaque*, i32, %swift.type*)* @_T020enum_value_semantics23SinglePayloadNontrivialOwui to i8*)
// CHECK: ]


// CHECK-LABEL: @_T020enum_value_semantics23SinglePayloadNontrivialOMf =
// CHECK-SAME: internal constant <{ {{.*}} }> <{
// CHECK-SAME:   i8** getelementptr inbounds ([18 x i8*], [18 x i8*]* @_T020enum_value_semantics23SinglePayloadNontrivialOWV, i32 0, i32 0),
// CHECK-SAME:   i64 2,
// CHECK-SAME:   {{.*}}* @_T020enum_value_semantics23SinglePayloadNontrivialOMn
// CHECK-SAME: }>


// CHECK-LABEL: @_T020enum_value_semantics18GenericFixedLayoutOMP = internal global <{{[{].*\* [}]}}> <{
// CHECK:   %swift.type* (%swift.type_pattern*, i8**)* @create_generic_metadata_GenericFixedLayout
// CHECK:   i32 40, i16 1, i16 16,
// CHECK:   [16 x i8*] zeroinitializer,
// CHECK:   i8** getelementptr inbounds ([18 x i8*], [18 x i8*]* @_T020enum_value_semantics18GenericFixedLayoutOWV, i32 0, i32 0),
// CHECK:   i64 2,
// CHECK:   {{.*}}* @_T020enum_value_semantics18GenericFixedLayoutOMn
// CHECK:   i{{32|64}} 0
// CHECK:   %swift.type* null,
// CHECK:   %swift.type** null
// CHECK: }>

sil @single_payload_nontrivial_copy_destroy : $(@owned SinglePayloadNontrivial) -> () {
bb0(%0 : $SinglePayloadNontrivial):
  retain_value %0 : $SinglePayloadNontrivial
  %1 = function_ref @single_payload_nontrivial_user : $@convention(thin) (@owned SinglePayloadNontrivial) -> ()
  apply %1(%0) : $@convention(thin) (@owned SinglePayloadNontrivial) -> ()
  release_value %0 : $SinglePayloadNontrivial
  %v = tuple ()
  return %v : $()
}

// CHECK-LABEL: define{{( protected)?}} swiftcc void @single_payload_nontrivial_copy_destroy(i64)
// CHECK:      call void @_T020enum_value_semantics23SinglePayloadNontrivialOWy
// CHECK-NEXT: call swiftcc void @single_payload_nontrivial_user
// CHECK-NEXT: call void @_T020enum_value_semantics23SinglePayloadNontrivialOWe
// CHECK-NEXT: ret void

//
// No payload enums
//


// -- NoPayload getExtraInhabitants
// CHECK-LABEL: define linkonce_odr hidden i32 @_T020enum_value_semantics9NoPayloadOwxg
// CHECK:      [[VALUE:%.*]] = load i8, i8* {{%.*}}, align 1
// CHECK-NEXT: [[ZEXT:%.*]] = zext i8 [[VALUE]] to i32
// CHECK-NEXT: [[SUB:%.*]] = sub i32 [[ZEXT]], 3
// CHECK-NEXT: [[EXTRA:%.*]] = icmp slt i32 [[SUB]], 0
// CHECK-NEXT: [[RES:%.*]] = select i1 [[EXTRA]], i32 -1, i32 [[SUB]]
// CHECK-NEXT: ret i32 [[RES]]


// -- NoPayload getEnumTag
// CHECK-LABEL: define linkonce_odr hidden i32 @_T020enum_value_semantics9NoPayloadOwug
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics9NoPayloadO*
// CHECK-NEXT: [[TAG_ADDR:%.*]] = getelementptr inbounds %T20enum_value_semantics9NoPayloadO, %T20enum_value_semantics9NoPayloadO* [[SELF]], i32 0, i32 0
// CHECK-NEXT: [[TAG:%.*]] = load i8, i8* [[TAG_ADDR]], align 1
// CHECK-NEXT: [[RESULT:%.*]] = zext i8 %2 to i32
// CHECK-NEXT: ret i32 [[RESULT]]


// -- NoPayload destructiveProjectEnumData
// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics9NoPayloadOwup
// CHECK:      ret void


// -- NoPayload destructiveInjectEnumTag
// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics9NoPayloadOwui
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics9NoPayloadO*
// CHECK-NEXT: [[TAG:%.*]] = trunc i32 %tag to i8
// CHECK-NEXT: [[TAG_ADDR:%.*]] = getelementptr inbounds %T20enum_value_semantics9NoPayloadO, %T20enum_value_semantics9NoPayloadO* [[SELF]], i32 0, i32 0
// CHECK-NEXT: store i8 [[TAG]], i8* [[TAG_ADDR]], align 1
// CHECK-NEXT: ret void


//
// Singleton payload enums
//


// -- SingletonPayload getEnumTag
// CHECK-LABEL: define linkonce_odr hidden i32 @_T020enum_value_semantics16SingletonPayloadOwug
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics16SingletonPayloadO*
// CHECK-NEXT: ret i32 -1


// -- SingletonPayload destructiveProjectEnumData
// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics16SingletonPayloadOwup
// CHECK:      ret void


// -- SingletonPayload destructiveInjectEnumTag
// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics16SingletonPayloadOwui
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics16SingletonPayloadO*
// CHECK-NEXT: ret void


// -- SinglePayloadTrivial getEnumTag
// CHECK-LABEL: define linkonce_odr hidden i32 @_T020enum_value_semantics20SinglePayloadTrivialOwug
// CHECK:  [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics20SinglePayloadTrivialO*
// CHECK:  [[OPAQUE:%.*]] = bitcast %T20enum_value_semantics20SinglePayloadTrivialO* [[SELF]] to %swift.opaque*
// CHECK:  [[TAG:%.*]] = call i32 %getEnumTagSinglePayload(%swift.opaque* noalias [[OPAQUE]], i32 3, %swift.type* getelementptr inbounds (%swift.full_type, %swift.full_type* @_T0Bi64_N, i32 0, i32 1))
// CHECK:  ret i32 [[TAG]]


// -- SinglePayloadTrivial destructiveProjectEnumData
// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics20SinglePayloadTrivialOwup
// CHECK:      ret void


//
// Single-payload enums
//


// -- SinglePayloadTrivial destructiveInjectEnumTag
// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics20SinglePayloadTrivialOwui
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics20SinglePayloadTrivialO*
// CHECK-NEXT: [[OPAQUE:%.*]] = bitcast %T20enum_value_semantics20SinglePayloadTrivialO* [[SELF]] to %swift.opaque*
// CHECK: call void %storeEnumTagSinglePayload(%swift.opaque* noalias [[OPAQUE]], i32 %tag, i32 3, %swift.type* getelementptr inbounds (%swift.full_type, %swift.full_type* @_T0Bi64_N, i32 0, i32 1))
// CHECK-NEXT: ret void


// -- SinglePayloadNontrivial destroyBuffer
// CHECK: define linkonce_odr hidden void @_T020enum_value_semantics23SinglePayloadNontrivialOwxx(%swift.opaque* noalias [[OBJ:%.*]], %swift.type* %SinglePayloadNontrivial) {{.*}} {
// CHECK:      [[ADDR:%.*]] = bitcast %swift.opaque* [[OBJ]] to %T20enum_value_semantics23SinglePayloadNontrivialO*
// CHECK-NEXT: [[PAYLOAD_ADDR:%.*]] = bitcast %T20enum_value_semantics23SinglePayloadNontrivialO* [[ADDR]] to i64*
// CHECK-NEXT: [[PAYLOAD:%.*]] = load i64, i64* [[PAYLOAD_ADDR]], align 8
// CHECK-NEXT: switch i64 %2, label %[[RELEASE_PAYLOAD:[0-9]+]] [
// CHECK:        i64 0, label %[[DONE:[0-9]+]]
// CHECK:        i64 2, label %[[DONE]]
// CHECK:        i64 4, label %[[DONE]]
// CHECK:      ]

// CHECK:      ; <label>:[[RELEASE_PAYLOAD]]
// CHECK-NEXT: [[DATA_ADDR:%.*]] = bitcast %T20enum_value_semantics23SinglePayloadNontrivialO* [[ADDR]] to %swift.refcounted**
// CHECK-NEXT: [[DATA:%.*]] = load %swift.refcounted*, %swift.refcounted** [[DATA_ADDR]], align 8
// CHECK-NEXT: call void @swift_rt_swift_release(%swift.refcounted* [[DATA]])
// CHECK-NEXT: br label %[[DONE]]

// CHECK:      ; <label>:[[DONE]]
// CHECK-NEXT: ret void


//
// Multi-payload enums
//


// -- MultiPayloadTrivial getEnumTag
// CHECK-LABEL: define linkonce_odr hidden i32 @_T020enum_value_semantics19MultiPayloadTrivialOwug
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics19MultiPayloadTrivialO*
// CHECK-NEXT: [[PAYLOAD:%.*]] = bitcast %T20enum_value_semantics19MultiPayloadTrivialO* [[SELF]] to i64*


//   -- Load the low bits of the tag from the payload area
// CHECK-NEXT: [[NO_PAYLOAD_TAG_TMP:%.*]] = load i64, i64* [[PAYLOAD]], align 8

//   -- Load the high bits of the tag from the extra tag area
// CHECK-NEXT: [[EXTRA_TAG_ADDR_TMP:%.*]] = getelementptr inbounds %T20enum_value_semantics19MultiPayloadTrivialO, %T20enum_value_semantics19MultiPayloadTrivialO* [[SELF]], i32 0, i32 1
// CHECK-NEXT: [[EXTRA_TAG_ADDR:%.*]] = bitcast [1 x i8]* [[EXTRA_TAG_ADDR_TMP]] to i8*
// CHECK-NEXT: [[EXTRA_TAG_TMP:%.*]] = load i8, i8* [[EXTRA_TAG_ADDR]], align 8
// CHECK-NEXT: [[EXTRA_TAG:%.*]] = zext i8 [[EXTRA_TAG_TMP]] to i32

//   -- Form tag for the payload case, or the high bits of no-payload case
// CHECK-NEXT: [[PAYLOAD_TAG:%.*]] = sub i32 [[EXTRA_TAG]], 2

//   -- Combine them to form the tag for the no-payload case
// CHECK-NEXT: [[NO_PAYLOAD_TAG:%.*]] = trunc i64 [[NO_PAYLOAD_TAG_TMP]] to i32

//   -- Check if we have a payload or not
// CHECK-NEXT: [[IS_PAYLOAD:%.*]] = icmp sge i32 [[PAYLOAD_TAG]], 0
// CHECK-NEXT: [[TAG:%.*]] = select i1 [[IS_PAYLOAD]], i32 [[NO_PAYLOAD_TAG]], i32 [[PAYLOAD_TAG]]

//   -- Return the tag
// CHECK-NEXT: ret i32 [[TAG]]

// -- MultiPayloadTrivial destructiveProjectEnumData
// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics19MultiPayloadTrivialOwup
// CHECK:      ret void


// -- MultiPayloadTrivial destructiveInjectEnumTag
// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics19MultiPayloadTrivialOwui
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics19MultiPayloadTrivialO*
// CHECK-NEXT: [[IS_PAYLOAD:%.*]] = icmp sge i32 %tag, 0
// CHECK-NEXT: br i1 [[IS_PAYLOAD]], label %[[HAS_NO_PAYLOAD:.*]], label %[[HAS_PAYLOAD:.*]]

// CHECK:      ; <label>:[[HAS_NO_PAYLOAD]]

//   -- Compute the no-payload tag
// CHECK-NEXT: [[NO_PAYLOAD_TAG:%.*]] = zext i32 %tag to i64
// CHECK-NEXT: [[PAYLOAD:%.*]] = bitcast %T20enum_value_semantics19MultiPayloadTrivialO* [[SELF]] to i64*

//   -- Store the low bits of the tag in the payload area
// CHECK-NEXT: store i64 [[NO_PAYLOAD_TAG]], i64* [[PAYLOAD]], align 8

//   -- Store the high bits of the tag in the extra tag area
// CHECK-NEXT: [[EXTRA_TAG_ADDR_TMP:%.*]] = getelementptr inbounds %T20enum_value_semantics19MultiPayloadTrivialO, %T20enum_value_semantics19MultiPayloadTrivialO* [[SELF]], i32 0, i32 1
// CHECK-NEXT: [[EXTRA_TAG_ADDR:%.*]] = bitcast [1 x i8]* [[EXTRA_TAG_ADDR_TMP]] to i8*
// CHECK-NEXT: store i8 2, i8* [[EXTRA_TAG_ADDR]], align 8
// CHECK-NEXT: br label %[[DONE:.*]]

// CHECK:      ; <label>:[[HAS_PAYLOAD]]

//   -- Store the tag in the extra tag area
// CHECK-NEXT: [[PAYLOAD_TAG:%.*]] = add i32 %tag, 2
// CHECK-NEXT: [[TAG:%.*]] = trunc i32 [[PAYLOAD_TAG]] to i8
// CHECK-NEXT: [[EXTRA_TAG_ADDR_TMP:%.*]] = getelementptr inbounds %T20enum_value_semantics19MultiPayloadTrivialO, %T20enum_value_semantics19MultiPayloadTrivialO* [[SELF]], i32 0, i32 1
// CHECK-NEXT: [[EXTRA_TAG_ADDR:%.*]] = bitcast [1 x i8]* [[EXTRA_TAG_ADDR_TMP]] to i8*
// CHECK-NEXT: store i8 [[TAG]], i8* [[EXTRA_TAG_ADDR]], align 8
// CHECK-NEXT: br label %[[DONE]]

// CHECK:      ; <label>:[[DONE]]
// CHECK-NEXT: ret void


//
// Multi-payload enums with no empty cases
//


// -- MultiPayloadNoEmptyCases getEnumTag
// CHECK-LABEL: define linkonce_odr hidden i32 @_T020enum_value_semantics24MultiPayloadNoEmptyCasesOwug
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics24MultiPayloadNoEmptyCasesO*
// CHECK-NEXT: [[PAYLOAD:%.*]] = bitcast %T20enum_value_semantics24MultiPayloadNoEmptyCasesO* [[SELF]] to i64*
// CHECK-NEXT: [[NO_PAYLOAD_TAG_TMP:%.*]] = load i64, i64* [[PAYLOAD]], align 8

//   -- The payload has no spare bits and there are no empty cases, so the tag
//      is entirely contained in the extra tag area
// CHECK-NEXT: [[EXTRA_TAG_ADDR_TMP:%.*]] = getelementptr inbounds %T20enum_value_semantics24MultiPayloadNoEmptyCasesO, %T20enum_value_semantics24MultiPayloadNoEmptyCasesO* [[SELF]], i32 0, i32 1
// CHECK-NEXT: [[EXTRA_TAG_ADDR:%.*]] = bitcast [1 x i8]* [[EXTRA_TAG_ADDR_TMP]] to i1*
// CHECK-NEXT: [[EXTRA_TAG_TMP:%.*]] = load i1, i1* [[EXTRA_TAG_ADDR]], align 8
// CHECK-NEXT: [[EXTRA_TAG:%.*]] = zext i1 [[EXTRA_TAG_TMP]] to i32
// CHECK-NEXT: [[PAYLOAD_TAG:%.*]] = sub i32 [[EXTRA_TAG]], 2
// CHECK-NEXT: ret i32 [[PAYLOAD_TAG]]

// -- MultiPayloadNoEmptyCases destructiveProjectEnumData
// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics24MultiPayloadNoEmptyCasesOwup
// CHECK:      ret void


// -- MultiPayloadNoEmptyCases destructiveInjectEnumTag
// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics24MultiPayloadNoEmptyCasesOwui
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics24MultiPayloadNoEmptyCasesO*
// CHECK-NEXT: [[PAYLOAD_TAG:%.*]] = add i32 %tag, 2
// CHECK-NEXT: [[TAG:%.*]] = trunc i32 [[PAYLOAD_TAG]] to i1

//   -- Store the tag in the extra tag area
// CHECK-NEXT: [[EXTRA_TAG_ADDR_TMP:%.*]] = getelementptr inbounds %T20enum_value_semantics24MultiPayloadNoEmptyCasesO, %T20enum_value_semantics24MultiPayloadNoEmptyCasesO* [[SELF]], i32 0, i32 1
// CHECK-NEXT: [[EXTRA_TAG_ADDR:%.*]] = bitcast [1 x i8]* [[EXTRA_TAG_ADDR_TMP]] to i1*
// CHECK-NEXT: store i1 [[TAG]], i1* [[EXTRA_TAG_ADDR]], align 8
// CHECK-NEXT: ret void


//
// Multi-payload enum with empty payloads -- payload tag is not used
//


// -- MultiPayloadEmptyPayload getEnumTag
// CHECK-LABEL: define linkonce_odr hidden i32 @_T020enum_value_semantics017MultiPayloadEmptyE0Owug
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics017MultiPayloadEmptyE0O*

//   -- Load the tag from the extra tag area
// CHECK-NEXT: [[EXTRA_TAG_ADDR:%.*]] = getelementptr inbounds %T20enum_value_semantics017MultiPayloadEmptyE0O, %T20enum_value_semantics017MultiPayloadEmptyE0O* [[SELF]], i32 0, i32 0
// CHECK-NEXT: [[EXTRA_TAG_TMP:%.*]] = load i8, i8* [[EXTRA_TAG_ADDR]], align 1
// CHECK-NEXT: [[EXTRA_TAG:%.*]] = zext i8 [[EXTRA_TAG_TMP]] to i32
// CHECK-NEXT: ret i32 [[EXTRA_TAG]]


// -- MultiPayloadEmptyPayload destructiveProjectEnumData
// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics017MultiPayloadEmptyE0Owup
// CHECK:      ret void


// -- MultiPayloadEmptyPayload destructiveInjectEnumTag
// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics017MultiPayloadEmptyE0Owui
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics017MultiPayloadEmptyE0O*

//   -- Store the tag in the extra tag area
// CHECK-NEXT: [[TAG:%.*]] = trunc i32 %tag to i8
// CHECK-NEXT: [[EXTRA_TAG_ADDR:%.*]] = getelementptr inbounds %T20enum_value_semantics017MultiPayloadEmptyE0O, %T20enum_value_semantics017MultiPayloadEmptyE0O* [[SELF]], i32 0, i32 0
// CHECK-NEXT: store i8 [[TAG]], i8* [[EXTRA_TAG_ADDR]], align 1
// CHECK-NEXT: ret void


//
// Multi-payload enum with non-POD payloads
//


// -- MultiPayloadNontrivial destroyBuffer
// CHECK: define linkonce_odr hidden void @_T020enum_value_semantics22MultiPayloadNontrivialOwxx(%swift.opaque* noalias [[OBJ:%.*]], %swift.type* %MultiPayloadNontrivial)
// CHECK:      [[ADDR:%.*]] = bitcast %swift.opaque* [[OBJ]] to %T20enum_value_semantics22MultiPayloadNontrivialO*
// CHECK-NEXT: [[PAYLOAD_ADDR:%.*]] = bitcast %T20enum_value_semantics22MultiPayloadNontrivialO* [[ADDR]] to { i64, i64 }*
// CHECK-NEXT: [[PAYLOAD_0_ADDR:%.*]] = getelementptr
// CHECK-NEXT: [[PAYLOAD_0:%.*]] = load i64, i64* [[PAYLOAD_0_ADDR]], align 8
// CHECK-NEXT: [[PAYLOAD_1_ADDR:%.*]] = getelementptr
// CHECK-NEXT: [[PAYLOAD_1:%.*]] = load i64, i64* [[PAYLOAD_1_ADDR]], align 8
// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds %T20enum_value_semantics22MultiPayloadNontrivialO, %T20enum_value_semantics22MultiPayloadNontrivialO* %0, i32 0, i32 1
// CHECK-NEXT: [[TAG_ADDR:%.*]] = bitcast [1 x i8]* [[T0]] to i8*
// CHECK-NEXT: [[TAG:%.*]] = load i8, i8* [[TAG_ADDR]], align 8
// CHECK-NEXT: @_T020enum_value_semantics22MultiPayloadNontrivialOWe
// CHECK-NEXT: ret void


//
// Multi-payload enum with generic layout -- spare bits are not used
//


// CHECK-LABEL: define linkonce_odr hidden i32 @_T020enum_value_semantics19MultiPayloadGenericOwug
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics19MultiPayloadGenericO*
// CHECK-NEXT: [[OPAQUE:%.*]] = bitcast %T20enum_value_semantics19MultiPayloadGenericO* [[SELF]] to %swift.opaque*
// CHECK-NEXT: [[TAG:%.*]] = call i32 @swift_getEnumCaseMultiPayload(%swift.opaque* [[OPAQUE]], %swift.type* %"MultiPayloadGeneric<T>")
// CHECK-NEXT: [[PAYLOAD_TAG:%.*]] = sub i32 [[TAG]], 2
// CHECK-NEXT: ret i32 [[PAYLOAD_TAG]]


// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics19MultiPayloadGenericOwup
// CHECK:      ret void


// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics19MultiPayloadGenericOwui
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics19MultiPayloadGenericO*
// CHECK-NEXT: [[PAYLOAD_TAG:%.*]] = add i32 %tag, 2
// CHECK:      [[OPAQUE:%.*]] = bitcast %T20enum_value_semantics19MultiPayloadGenericO* [[SELF]] to %swift.opaque*
// CHECK-NEXT: call void @swift_storeEnumTagMultiPayload(%swift.opaque* [[OPAQUE]], %swift.type* %"MultiPayloadGeneric<T>", i32 [[PAYLOAD_TAG]])
// CHECK-NEXT: ret void


//
// Multi-payload enum with spare bits
//


// -- MultiPayloadNontrivialSpareBits destroyBuffer
// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics31MultiPayloadNontrivialSpareBitsOwxx
// CHECK-SAME: (%swift.opaque* noalias [[OBJ:%.*]], %swift.type* %MultiPayloadNontrivialSpareBits) {{.*}} {
// CHECK:      [[ADDR:%.*]] = bitcast %swift.opaque* [[OBJ]] to %T20enum_value_semantics31MultiPayloadNontrivialSpareBitsO*
// CHECK-NEXT: [[PAYLOAD_ADDR:%.*]] = bitcast %T20enum_value_semantics31MultiPayloadNontrivialSpareBitsO* [[ADDR]] to { i64, i64 }*
// CHECK-NEXT: [[PAYLOAD_0_ADDR:%.*]] = getelementptr
// CHECK-NEXT: [[PAYLOAD_0:%.*]] = load i64, i64* [[PAYLOAD_0_ADDR]], align 8
// CHECK-NEXT: [[PAYLOAD_1_ADDR:%.*]] = getelementptr
// CHECK-NEXT: [[PAYLOAD_1:%.*]] = load i64, i64* [[PAYLOAD_1_ADDR]], align 8
// CHECK:      call void @_T020enum_value_semantics31MultiPayloadNontrivialSpareBitsOWe
// CHECK-NEXT: ret void


// CHECK-LABEL: define linkonce_odr hidden i32 @_T020enum_value_semantics31MultiPayloadNontrivialSpareBitsOwug
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics31MultiPayloadNontrivialSpareBitsO*

//   -- Load the payload
// CHECK-NEXT: [[PAYLOAD:%.*]] = bitcast %T20enum_value_semantics31MultiPayloadNontrivialSpareBitsO* [[SELF]] to { i64, i64 }*
// CHECK-NEXT: [[FIRST_ADDR:%.*]] = getelementptr inbounds { i64, i64 }, { i64, i64 }* [[PAYLOAD]], i32 0, i32 0
// CHECK-NEXT: [[FIRST:%.*]] = load i64, i64* [[FIRST_ADDR]], align 8
// CHECK-NEXT: [[SECOND_ADDR:%.*]] = getelementptr inbounds { i64, i64 }, { i64, i64 }* [[PAYLOAD]], i32 0, i32 1
// CHECK-NEXT: [[SECOND:%.*]] = load i64, i64* [[SECOND_ADDR]], align 8

//   -- Get the high bits of the tag from the spare bits
// CHECK-NEXT: [[SPARE_TAG_TMP:%.*]] = lshr i64 [[SECOND]], 62
// CHECK-NEXT: [[SPARE_TAG_TMP2:%.*]] = trunc i64 [[SPARE_TAG_TMP]] to i8
// CHECK-NEXT: [[SPARE_TAG_TMP3:%.*]] = and i8 [[SPARE_TAG_TMP2]], 3
// CHECK-NEXT: [[SPARE_TAG:%.*]] = zext i8 [[SPARE_TAG_TMP3]] to i32
// CHECK-NEXT: [[PAYLOAD_TAG:%.*]] = sub i32 [[SPARE_TAG]], 3

//   -- Get the low bits of the tag from the payload area
// CHECK-NEXT: [[NO_PAYLOAD_TAG:%.*]] = trunc i64 [[FIRST]] to i32

//   -- Check if we have a payload or not
// CHECK-NEXT: [[IS_PAYLOAD:%.*]] = icmp sge i32 [[PAYLOAD_TAG]], 0

//   -- Return the tag
// CHECK-NEXT: [[TAG:%.*]] = select i1 [[IS_PAYLOAD]], i32 [[NO_PAYLOAD_TAG]], i32 [[PAYLOAD_TAG]]
// CHECK-NEXT: ret i32 [[TAG]]

// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics31MultiPayloadNontrivialSpareBitsOwup
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to { i64, i64 }*

//   -- Load the payload
// CHECK-NEXT: [[FIRST_ADDR:%.*]] = getelementptr inbounds { i64, i64 }, { i64, i64 }* [[SELF]], i32 0, i32 0
// CHECK-NEXT: [[FIRST:%.*]] = load i64, i64* [[FIRST_ADDR]], align 8
// CHECK-NEXT: [[SECOND_ADDR:%.*]] = getelementptr inbounds { i64, i64 }, { i64, i64 }* [[SELF]], i32 0, i32 1
// CHECK-NEXT: [[SECOND:%.*]] = load i64, i64* [[SECOND_ADDR]], align 8

//   -- Strip off spare bits
// CHECK-NEXT: [[SECOND_PROJ:%.*]] = and i64 [[SECOND]], 4611686018427387903

//   -- Store the payload
// CHECK-NEXT: [[SELF:%.*]] = bitcast %swift.opaque* %value to { i64, i64 }*
// CHECK-NEXT: [[FIRST_ADDR:%.*]] = getelementptr inbounds { i64, i64 }, { i64, i64 }* [[SELF]], i32 0, i32 0
// CHECK-NEXT: store i64 [[FIRST]], i64* [[FIRST_ADDR]], align 8
// CHECK-NEXT: [[SECOND_ADDR:%.*]] = getelementptr inbounds { i64, i64 }, { i64, i64 }* [[SELF]], i32 0, i32 1
// CHECK-NEXT: store i64 [[SECOND_PROJ]], i64* [[SECOND_ADDR]], align 8
// CHECK-NEXT: ret void


// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics31MultiPayloadNontrivialSpareBitsOwui
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics31MultiPayloadNontrivialSpareBitsO*
// CHECK-NEXT: [[IS_PAYLOAD:%.*]] = icmp sge i32 %tag, 0
// CHECK-NEXT: br i1 [[IS_PAYLOAD]], label %[[HAS_NO_PAYLOAD:.*]], label %[[HAS_PAYLOAD:.*]]

// CHECK:      ; <label>:[[HAS_NO_PAYLOAD]]

//   -- Turn the case index into a no-payload case index
// CHECK-NEXT: [[NO_PAYLOAD_TAG:%.*]] = zext i32 %tag to i64

//   -- Store the low bits of the tag into the payload
// CHECK-NEXT: [[PAYLOAD:%.*]] = bitcast %T20enum_value_semantics31MultiPayloadNontrivialSpareBitsO* [[SELF]] to { i64, i64 }*
// CHECK-NEXT: [[FIRST_ADDR:%.*]] = getelementptr inbounds { i64, i64 }, { i64, i64 }* [[PAYLOAD]], i32 0, i32 0
// CHECK-NEXT: store i64 [[NO_PAYLOAD_TAG]], i64* [[FIRST_ADDR]], align 8

//   -- Store the high bits of the tag into the spare bits
// CHECK-NEXT: [[SECOND_ADDR:%.*]] = getelementptr inbounds { i64, i64 }, { i64, i64 }* [[PAYLOAD]], i32 0, i32 1
//   -- 0xc000000000000000
// CHECK-NEXT: store i64 -4611686018427387904, i64* [[SECOND_ADDR]], align 8
// CHECK-NEXT: br label %[[END:.*]]

// CHECK:      ; <label>:[[HAS_PAYLOAD]]

// CHECK-NEXT: [[TAG_TMP2:%.*]] = add i32 %tag, 3

//   -- Not really necessary
// CHECK-NEXT: [[TAG_TMP:%.*]] = and i32 [[TAG_TMP2]], 3

//   -- Load the payload
// CHECK-NEXT: [[PAYLOAD:%.*]] = bitcast %T20enum_value_semantics31MultiPayloadNontrivialSpareBitsO* [[SELF]] to { i64, i64 }*
// CHECK-NEXT: [[FIRST_ADDR:%.*]] = getelementptr inbounds { i64, i64 }, { i64, i64 }* [[PAYLOAD]], i32 0, i32 0
// CHECK-NEXT: [[FIRST:%.*]] = load i64, i64* [[FIRST_ADDR]], align 8
// CHECK-NEXT: [[SECOND_ADDR:%.*]] = getelementptr inbounds { i64, i64 }, { i64, i64 }* [[PAYLOAD]], i32 0, i32 1
// CHECK-NEXT: [[SECOND:%.*]] = load i64, i64* [[SECOND_ADDR]], align 8

//   -- Mask off spare bits in the payload               -- 0x3fffffffffffffff
// CHECK-NEXT: [[SECOND_PROJ:%.*]] = and i64 [[SECOND]], 4611686018427387903

//   -- Store the low bits of the tag in the spare bits of the payload
// CHECK-NEXT: [[TAG:%.*]] = zext i32 [[TAG_TMP]] to i64
// CHECK-NEXT: [[SPARE_TAG_TMP2:%.*]] = shl i64 [[TAG]], 62

//   -- Not really necessary                                       -- 0xc000000000000000
// CHECK-NEXT: [[SPARE_TAG_TMP:%.*]] = and i64 [[SPARE_TAG_TMP2]], -4611686018427387904

//   -- Apply the new spare bits
// CHECK-NEXT: [[SECOND_NEW:%.*]] = or i64 [[SECOND_PROJ]], [[SPARE_TAG_TMP]]

//   -- Store the payload back
// CHECK-NEXT: [[PAYLOAD:%.*]] = bitcast %T20enum_value_semantics31MultiPayloadNontrivialSpareBitsO* [[SELF]] to { i64, i64 }*
// CHECK-NEXT: [[FIRST_ADDR:%.*]] = getelementptr inbounds { i64, i64 }, { i64, i64 }* [[PAYLOAD]], i32 0, i32 0
// CHECK-NEXT: store i64 [[FIRST]], i64* [[FIRST_ADDR]], align 8
// CHECK-NEXT: [[SECOND_ADDR:%.*]] = getelementptr inbounds { i64, i64 }, { i64, i64 }* [[PAYLOAD]], i32 0, i32 1
// CHECK-NEXT: store i64 [[SECOND_NEW]], i64* [[SECOND_ADDR]], align 8
// CHECK-NEXT: br label %[[END]]

// CHECK:      ; <label>:[[END]]
// CHECK-NEXT: ret void


// CHECK-LABEL: define linkonce_odr hidden i32 @_T020enum_value_semantics029MultiPayloadSpareBitsAndExtraG0Owug
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics029MultiPayloadSpareBitsAndExtraG0O*

//   -- Load the payload
// CHECK-NEXT: [[PAYLOAD_ADDR:%.*]] = bitcast %T20enum_value_semantics029MultiPayloadSpareBitsAndExtraG0O* [[SELF]] to i64*
// CHECK-NEXT: [[PAYLOAD:%.*]] = load i64, i64* [[PAYLOAD_ADDR]], align 8

//   -- Load the load bits of the tag from the extra tag area
// CHECK-NEXT: [[EXTRA_TAG_ADDR_TMP:%.*]] = getelementptr inbounds %T20enum_value_semantics029MultiPayloadSpareBitsAndExtraG0O, %T20enum_value_semantics029MultiPayloadSpareBitsAndExtraG0O* [[SELF]], i32 0, i32 1
// CHECK-NEXT: [[EXTRA_TAG_ADDR:%.*]] = bitcast [1 x i8]* [[EXTRA_TAG_ADDR_TMP]] to i1*
// CHECK-NEXT: [[EXTRA_TAG_TMP:%.*]] = load i1, i1* [[EXTRA_TAG_ADDR]], align 8

//   -- Load the high bits of the tag from the spare bits area
// CHECK-NEXT: [[SPARE_BITS_TMP2:%.*]] = lshr i64 [[PAYLOAD]], 63
// CHECK-NEXT: [[SPARE_BITS_TMP:%.*]] = trunc i64 [[SPARE_BITS_TMP2]] to i8
// CHECK-NEXT: [[SPARE_BITS:%.*]] = and i8 [[SPARE_BITS_TMP]], 1
// CHECK-NEXT: [[EXTRA_TAG:%.*]] = zext i1 [[EXTRA_TAG_TMP]] to i8

//   -- Combine high bits and low bits to form tag
// CHECK-NEXT: [[TAG_TMP:%.*]] = shl i8 [[EXTRA_TAG]], 1
// CHECK-NEXT: [[TAG:%.*]] = or i8 [[SPARE_BITS]], [[TAG_TMP]]
// CHECK-NEXT: [[RESULT:%.*]] = zext i8 [[TAG]] to i32
// CHECK-NEXT: [[PAYLOAD_TAG:%.*]] = sub i32 [[RESULT]],
// CHECK-NEXT: ret i32 [[PAYLOAD_TAG]]


// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics029MultiPayloadSpareBitsAndExtraG0Owup
// CHECK:      [[PAYLOAD_ADDR:%.*]] = bitcast %swift.opaque* %value to i64*
// CHECK-NEXT: [[PAYLOAD:%.*]] = load i64, i64* [[PAYLOAD_ADDR]], align 8
//                                                         -- 0x7fffffffffffffff
// CHECK-NEXT: [[PAYLOAD_PROJ:%.*]] = and i64 [[PAYLOAD]], 9223372036854775807
// CHECK-NEXT: [[PAYLOAD_ADDR:%.*]] = bitcast %swift.opaque* %value to i64*
// CHECK-NEXT: store i64 [[PAYLOAD_PROJ]], i64* [[PAYLOAD_ADDR]], align 8
// CHECK-NEXT: ret void


// CHECK-LABEL: define linkonce_odr hidden void @_T020enum_value_semantics029MultiPayloadSpareBitsAndExtraG0Owui
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %T20enum_value_semantics029MultiPayloadSpareBitsAndExtraG0O*
// CHECK-NEXT: [[PAYLOAD_TAG:%.*]] = add i32 %tag, 3
// CHECK-NEXT: [[SPARE_TAG_TMP3:%.*]] = and i32 [[PAYLOAD_TAG]], 1

//   -- Load the payload
// CHECK-NEXT: [[PAYLOAD_ADDR:%.*]] = bitcast %T20enum_value_semantics029MultiPayloadSpareBitsAndExtraG0O* %0 to i64*
// CHECK-NEXT: [[PAYLOAD:%.*]] = load i64, i64* [[PAYLOAD_ADDR]], align 8

//   -- Mask off the spare bits
//                                                         -- 0x7fffffffffffffff
// CHECK-NEXT: [[PAYLOAD_PROJ:%.*]] = and i64 [[PAYLOAD]], 9223372036854775807

//   -- Store low bits of tag in spare bits area
// CHECK-NEXT: [[SPARE_TAG_TMP2:%.*]] = zext i32 [[SPARE_TAG_TMP3]] to i64
// CHECK-NEXT: [[SPARE_TAG_TMP:%.*]] = shl i64 [[SPARE_TAG_TMP2]], 63
//                                                                -- 0x8000000000000000
// CHECK-NEXT: [[SPARE_TAG:%.*]] = and i64 [[SPARE_TAG_TMP:%.*]], -9223372036854775808
// CHECK-NEXT: [[PAYLOAD_NEW:%.*]] = or i64 [[PAYLOAD_PROJ]], [[SPARE_TAG]]

//   -- Store the payload
// CHECK-NEXT: [[PAYLOAD_ADDR:%.*]] = bitcast %T20enum_value_semantics029MultiPayloadSpareBitsAndExtraG0O* %0 to i64*
// CHECK-NEXT: store i64 [[PAYLOAD_NEW]], i64* [[PAYLOAD_ADDR]], align 8

//   -- Store high bits of tag in extra tag area
// CHECK-NEXT: [[EXTRA_TAG_TMP:%.*]] = lshr i32 [[PAYLOAD_TAG]], 1
// CHECK-NEXT: [[EXTRA_TAG:%.*]] = trunc i32 [[EXTRA_TAG_TMP]] to i1
// CHECK-NEXT: [[EXTRA_TAG_ADDR_TMP:%.*]] = getelementptr inbounds %T20enum_value_semantics029MultiPayloadSpareBitsAndExtraG0O, %T20enum_value_semantics029MultiPayloadSpareBitsAndExtraG0O* [[SELF]], i32 0, i32 1
// CHECK-NEXT: [[EXTRA_TAG_ADDR:%.*]] = bitcast [1 x i8]* [[EXTRA_TAG_ADDR_TMP]] to i1*
// CHECK-NEXT: store i1 [[EXTRA_TAG]], i1* [[EXTRA_TAG_ADDR]], align 8
// CHECK-NEXT: ret void