// RUN: %target-swift-frontend %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
}

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: @_TWVO20enum_value_semantics20SinglePayloadTrivial = hidden constant [26 x 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*, %swift.type*)* @__swift_noop_self_return to i8*),
// CHECK:   i8* bitcast (void (i8*, %swift.type*)* @__swift_noop_void_return 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 (i8* (i8*, i8*, %swift.type*)* @__swift_memcpy9_8 to i8*),
// CHECK:   i8* bitcast (i8* (i8*, %swift.type*)* @__swift_noop_self_return to 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*, i64, %swift.type*)* @__swift_memcpy_array16_8 to i8*),
// CHECK:   i8* bitcast (i8* (i8*, i8*, i64, %swift.type*)* @__swift_memmove_array16_8 to i8*),
// CHECK:   i8* bitcast (i8* (i8*, i8*, i64, %swift.type*)* @__swift_memmove_array16_8 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*)* @_TwugO20enum_value_semantics20SinglePayloadTrivial to i8*),
// CHECK:   i8* bitcast (void (%swift.opaque*, %swift.type*)* @_TwupO20enum_value_semantics20SinglePayloadTrivial to i8*),
// CHECK:   i8* bitcast (void (%swift.opaque*, i32, %swift.type*)* @_TwuiO20enum_value_semantics20SinglePayloadTrivial to i8*)
// CHECK: ]


// CHECK-LABEL: @_TMfO20enum_value_semantics20SinglePayloadTrivial =
// CHECK-SAME:   internal constant {{.*}} <{
// CHECK-SAME:   i8** getelementptr inbounds ([26 x i8*], [26 x i8*]* @_TWVO20enum_value_semantics20SinglePayloadTrivial, i32 0, i32 0),
// CHECK-SAME:   i64 2,
// CHECK-SAME:   {{.*}}* @_TMnO20enum_value_semantics20SinglePayloadTrivial
// CHECK-SAME:   %swift.type* null
// CHECK-SAME: }>


// CHECK-LABEL: @_TWVO20enum_value_semantics23SinglePayloadNontrivial = hidden constant [26 x i8*] [
// CHECK:   i8* bitcast (void ([24 x i8]*, %swift.type*)* @_TwXXO20enum_value_semantics23SinglePayloadNontrivial to i8*),
// CHECK:   i8* bitcast (%swift.opaque* ([24 x i8]*, [24 x i8]*, %swift.type*)* @_TwCPO20enum_value_semantics23SinglePayloadNontrivial to i8*),
// CHECK:   i8* bitcast (i8* (i8*, %swift.type*)* @__swift_noop_self_return to i8*),
// CHECK:   i8* bitcast (void (i8*, %swift.type*)* @__swift_noop_void_return to i8*),
// CHECK:   i8* bitcast (void (%swift.opaque*, %swift.type*)* @_TwxxO20enum_value_semantics23SinglePayloadNontrivial to i8*),
// CHECK:   i8* bitcast (%swift.opaque* ([24 x i8]*, %swift.opaque*, %swift.type*)* @_TwCpO20enum_value_semantics23SinglePayloadNontrivial to i8*),
// CHECK:   i8* bitcast (%swift.opaque* (%swift.opaque*, %swift.opaque*, %swift.type*)* @_TwcpO20enum_value_semantics23SinglePayloadNontrivial to i8*),
// CHECK:   i8* bitcast (%swift.opaque* (%swift.opaque*, %swift.opaque*, %swift.type*)* @_TwcaO20enum_value_semantics23SinglePayloadNontrivial to i8*),
// CHECK:   i8* bitcast (i8* (i8*, i8*, %swift.type*)* @__swift_memcpy8_8 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*)* @_TwtaO20enum_value_semantics23SinglePayloadNontrivial to i8*),
// CHECK:   i8* bitcast (i8* (i8*, %swift.type*)* @__swift_noop_self_return to i8*),
// CHECK:   i8* bitcast (i8* (i8*, i8*, %swift.type*)* @__swift_memcpy8_8 to i8*),
// CHECK:   i8* bitcast (void (%swift.opaque*, i64, %swift.type*)* @_TwXxO20enum_value_semantics23SinglePayloadNontrivial to i8*),
// CHECK:   i8* bitcast (%swift.opaque* (%swift.opaque*, %swift.opaque*, i64, %swift.type*)* @_TwCcO20enum_value_semantics23SinglePayloadNontrivial to i8*),
// CHECK:   i8* bitcast (i8* (i8*, i8*, i64, %swift.type*)* @__swift_memmove_array8_8 to i8*),
// CHECK:   i8* bitcast (i8* (i8*, i8*, i64, %swift.type*)* @__swift_memmove_array8_8 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*)* @_TwxsO20enum_value_semantics23SinglePayloadNontrivial to i8*)
// CHECK:   i8* bitcast (i32 (%swift.opaque*, %swift.type*)* @_TwxgO20enum_value_semantics23SinglePayloadNontrivial to i8*)
// CHECK:   i8* bitcast (i32 (%swift.opaque*, %swift.type*)* @_TwugO20enum_value_semantics23SinglePayloadNontrivial to i8*),
// CHECK:   i8* bitcast (void (%swift.opaque*, %swift.type*)* @_TwupO20enum_value_semantics23SinglePayloadNontrivial to i8*)
// CHECK:   i8* bitcast (void (%swift.opaque*, i32, %swift.type*)* @_TwuiO20enum_value_semantics23SinglePayloadNontrivial to i8*)
// CHECK: ]


// CHECK-LABEL: @_TMfO20enum_value_semantics23SinglePayloadNontrivial =
// CHECK-SAME: internal constant {{.*}} <{
// CHECK-SAME:   i8** getelementptr inbounds ([26 x i8*], [26 x i8*]* @_TWVO20enum_value_semantics23SinglePayloadNontrivial, i32 0, i32 0),
// CHECK-SAME:   i64 2,
// CHECK-SAME:   {{.*}}* @_TMnO20enum_value_semantics23SinglePayloadNontrivial
// CHECK-SAME:   %swift.type* null
// CHECK-SAME: }>


// CHECK-LABEL: @_TMPO20enum_value_semantics18GenericFixedLayout = hidden global <{{[{].*\* [}]}}> <{
// CHECK:   %swift.type* (%swift.type_pattern*, i8**)* @create_generic_metadata_GenericFixedLayout
// CHECK:   i32 48, i16 1, i16 8,
// CHECK:   [16 x i8*] zeroinitializer,
// CHECK:   i8** getelementptr inbounds ([26 x i8*], [26 x i8*]* @_TWVO20enum_value_semantics18GenericFixedLayout, i32 0, i32 0),
// CHECK:   i64 2,
// CHECK:   {{.*}}* @_TMnO20enum_value_semantics18GenericFixedLayout
// CHECK:   i{{32|64}} 0
// CHECK:   %swift.type* null,
// CHECK:   %swift.type** null
// CHECK: }>

sil @single_payload_nontrivial_copy_destroy : $(SinglePayloadNontrivial) -> () {
bb0(%0 : $SinglePayloadNontrivial):
  retain_value %0 : $SinglePayloadNontrivial
  release_value %0 : $SinglePayloadNontrivial
  %v = tuple ()
  return %v : $()
}

// CHECK-LABEL: define{{( protected)?}} void @single_payload_nontrivial_copy_destroy(i64)
// CHECK:      switch i64 %0, label [[PRESENT:%.*]] [
// CHECK-NEXT:   i64 0, label [[NOT_PRESENT:%.*]]
// CHECK-NEXT:   i64 2, label [[NOT_PRESENT]]
// CHECK-NEXT:   i64 4, label [[NOT_PRESENT]]
// CHECK-NEXT: ]
// CHECK:      [[T0:%.*]] = inttoptr i64 [[V:%.*]] to %swift.refcounted*
// CHECK-NEXT: call void @rt_swift_retain(%swift.refcounted* [[T0]])
// CHECK-NEXT: br label [[NOT_PRESENT]]
// CHECK:      switch i64 %0, label [[PRESENT:%.*]] [
// CHECK-NEXT:   i64 0, label [[NOT_PRESENT:%.*]]
// CHECK-NEXT:   i64 2, label [[NOT_PRESENT]]
// CHECK-NEXT:   i64 4, label [[NOT_PRESENT]]
// CHECK-NEXT: ]
// CHECK:      [[T0:%.*]] = inttoptr i64 [[V:%.*]] to %swift.refcounted*
// CHECK-NEXT: call void @rt_swift_release(%swift.refcounted* [[T0]])
// CHECK-NEXT: br label [[NOT_PRESENT]]
// CHECK:      ret void

//
// No payload enums
//


// -- NoPayload getExtraInhabitants
// CHECK-LABEL: define linkonce_odr hidden i32 @_TwxgO20enum_value_semantics9NoPayload
// 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 @_TwugO20enum_value_semantics9NoPayload
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics9NoPayload*
// CHECK-NEXT: [[TAG_ADDR:%.*]] = getelementptr inbounds %O20enum_value_semantics9NoPayload, %O20enum_value_semantics9NoPayload* [[SELF]], i32 0, i32 0
// CHECK-NEXT: [[TAG:%.*]] = load i2, i2* [[TAG_ADDR]], align 1
// CHECK-NEXT: [[RESULT:%.*]] = zext i2 %2 to i32
// CHECK-NEXT: ret i32 [[RESULT]]


// -- NoPayload destructiveProjectEnumData
// CHECK-LABEL: define linkonce_odr hidden void @_TwupO20enum_value_semantics9NoPayload
// CHECK:      ret void


// -- NoPayload destructiveInjectEnumTag
// CHECK-LABEL: define linkonce_odr hidden void @_TwuiO20enum_value_semantics9NoPayload
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics9NoPayload*
// CHECK-NEXT: [[TAG:%.*]] = trunc i32 %tag to i2
// CHECK-NEXT: [[TAG_ADDR:%.*]] = getelementptr inbounds %O20enum_value_semantics9NoPayload, %O20enum_value_semantics9NoPayload* [[SELF]], i32 0, i32 0
// CHECK-NEXT: store i2 [[TAG]], i2* [[TAG_ADDR]], align 1
// CHECK-NEXT: ret void


//
// Singleton payload enums
//


// -- SingletonPayload getEnumTag
// CHECK-LABEL: define linkonce_odr hidden i32 @_TwugO20enum_value_semantics16SingletonPayload
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics16SingletonPayload*
// CHECK-NEXT: ret i32 -1


// -- SingletonPayload destructiveProjectEnumData
// CHECK-LABEL: define linkonce_odr hidden void @_TwupO20enum_value_semantics16SingletonPayload
// CHECK:      ret void


// -- SingletonPayload destructiveInjectEnumTag
// CHECK-LABEL: define linkonce_odr hidden void @_TwuiO20enum_value_semantics16SingletonPayload
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics16SingletonPayload*
// CHECK-NEXT: ret void


// -- SinglePayloadTrivial getEnumTag
// CHECK-LABEL: define linkonce_odr hidden i32 @_TwugO20enum_value_semantics20SinglePayloadTrivial
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics20SinglePayloadTrivial*
// CHECK-NEXT: [[OPAQUE:%.*]] = bitcast %O20enum_value_semantics20SinglePayloadTrivial* [[SELF]] to %swift.opaque*
// CHECK-NEXT: [[TAG:%.*]] = call i32 @rt_swift_getEnumCaseSinglePayload(%swift.opaque* [[OPAQUE]], %swift.type* getelementptr inbounds (%swift.full_type, %swift.full_type* @_TMBi64_, i32 0, i32 1), i32 3)
// CHECK-NEXT: ret i32 [[TAG]]


// -- SinglePayloadTrivial destructiveProjectEnumData
// CHECK-LABEL: define linkonce_odr hidden void @_TwupO20enum_value_semantics20SinglePayloadTrivial
// CHECK:      ret void


//
// Single-payload enums
//


// -- SinglePayloadTrivial destructiveInjectEnumTag
// CHECK-LABEL: define linkonce_odr hidden void @_TwuiO20enum_value_semantics20SinglePayloadTrivial
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics20SinglePayloadTrivial*
// CHECK-NEXT: [[OPAQUE:%.*]] = bitcast %O20enum_value_semantics20SinglePayloadTrivial* [[SELF]] to %swift.opaque*
// CHECK-NEXT: call void @rt_swift_storeEnumTagSinglePayload(%swift.opaque* [[OPAQUE]], %swift.type* getelementptr inbounds (%swift.full_type, %swift.full_type* @_TMBi64_, i32 0, i32 1), i32 %tag, i32 3)
// CHECK-NEXT: ret void


// -- SinglePayloadNontrivial destroyBuffer
// CHECK: define linkonce_odr hidden void @_TwxxO20enum_value_semantics23SinglePayloadNontrivial(%swift.opaque* [[OBJ:%.*]], %swift.type* %SinglePayloadNontrivial) {{.*}} {
// CHECK:      [[ADDR:%.*]] = bitcast %swift.opaque* [[OBJ]] to %O20enum_value_semantics23SinglePayloadNontrivial*
// CHECK-NEXT: [[PAYLOAD_ADDR:%.*]] = bitcast %O20enum_value_semantics23SinglePayloadNontrivial* [[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 %O20enum_value_semantics23SinglePayloadNontrivial* [[ADDR]] to %swift.refcounted**
// CHECK-NEXT: [[DATA:%.*]] = load %swift.refcounted*, %swift.refcounted** [[DATA_ADDR]], align 8
// CHECK-NEXT: call void @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 @_TwugO20enum_value_semantics19MultiPayloadTrivial
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics19MultiPayloadTrivial*
// CHECK-NEXT: [[PAYLOAD:%.*]] = bitcast %O20enum_value_semantics19MultiPayloadTrivial* [[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 %O20enum_value_semantics19MultiPayloadTrivial, %O20enum_value_semantics19MultiPayloadTrivial* [[SELF]], i32 0, i32 1
// CHECK-NEXT: [[EXTRA_TAG_ADDR:%.*]] = bitcast [1 x i8]* [[EXTRA_TAG_ADDR_TMP]] to i2*
// CHECK-NEXT: [[EXTRA_TAG_TMP:%.*]] = load i2, i2* [[EXTRA_TAG_ADDR]], align 8
// CHECK-NEXT: [[EXTRA_TAG:%.*]] = zext i2 [[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 @_TwupO20enum_value_semantics19MultiPayloadTrivial
// CHECK:      ret void


// -- MultiPayloadTrivial destructiveInjectEnumTag
// CHECK-LABEL: define linkonce_odr hidden void @_TwuiO20enum_value_semantics19MultiPayloadTrivial
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics19MultiPayloadTrivial*
// 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 %O20enum_value_semantics19MultiPayloadTrivial* [[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 %O20enum_value_semantics19MultiPayloadTrivial, %O20enum_value_semantics19MultiPayloadTrivial* [[SELF]], i32 0, i32 1
// CHECK-NEXT: [[EXTRA_TAG_ADDR:%.*]] = bitcast [1 x i8]* [[EXTRA_TAG_ADDR_TMP]] to i2*
// CHECK-NEXT: store i2 -2, i2* [[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 i2
// CHECK-NEXT: [[EXTRA_TAG_ADDR_TMP:%.*]] = getelementptr inbounds %O20enum_value_semantics19MultiPayloadTrivial, %O20enum_value_semantics19MultiPayloadTrivial* [[SELF]], i32 0, i32 1
// CHECK-NEXT: [[EXTRA_TAG_ADDR:%.*]] = bitcast [1 x i8]* [[EXTRA_TAG_ADDR_TMP]] to i2*
// CHECK-NEXT: store i2 [[TAG]], i2* [[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 @_TwugO20enum_value_semantics24MultiPayloadNoEmptyCases
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics24MultiPayloadNoEmptyCases*
// CHECK-NEXT: [[PAYLOAD:%.*]] = bitcast %O20enum_value_semantics24MultiPayloadNoEmptyCases* [[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 %O20enum_value_semantics24MultiPayloadNoEmptyCases, %O20enum_value_semantics24MultiPayloadNoEmptyCases* [[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 @_TwupO20enum_value_semantics24MultiPayloadNoEmptyCases
// CHECK:      ret void


// -- MultiPayloadNoEmptyCases destructiveInjectEnumTag
// CHECK-LABEL: define linkonce_odr hidden void @_TwuiO20enum_value_semantics24MultiPayloadNoEmptyCases
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics24MultiPayloadNoEmptyCases*
// 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 %O20enum_value_semantics24MultiPayloadNoEmptyCases, %O20enum_value_semantics24MultiPayloadNoEmptyCases* [[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 @_TwugO20enum_value_semantics24MultiPayloadEmptyPayload
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics24MultiPayloadEmptyPayload*

//   -- Load the tag from the extra tag area
// CHECK-NEXT: [[EXTRA_TAG_ADDR:%.*]] = getelementptr inbounds %O20enum_value_semantics24MultiPayloadEmptyPayload, %O20enum_value_semantics24MultiPayloadEmptyPayload* [[SELF]], i32 0, i32 0
// CHECK-NEXT: [[EXTRA_TAG_TMP:%.*]] = load i3, i3* [[EXTRA_TAG_ADDR]], align 1
// CHECK-NEXT: [[EXTRA_TAG:%.*]] = zext i3 [[EXTRA_TAG_TMP]] to i32
// CHECK-NEXT: ret i32 [[EXTRA_TAG]]


// -- MultiPayloadEmptyPayload destructiveProjectEnumData
// CHECK-LABEL: define linkonce_odr hidden void @_TwupO20enum_value_semantics24MultiPayloadEmptyPayload
// CHECK:      ret void


// -- MultiPayloadEmptyPayload destructiveInjectEnumTag
// CHECK-LABEL: define linkonce_odr hidden void @_TwuiO20enum_value_semantics24MultiPayloadEmptyPayload
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics24MultiPayloadEmptyPayload*

//   -- Store the tag in the extra tag area
// CHECK-NEXT: [[TAG:%.*]] = trunc i32 %tag to i3
// CHECK-NEXT: [[EXTRA_TAG_ADDR:%.*]] = getelementptr inbounds %O20enum_value_semantics24MultiPayloadEmptyPayload, %O20enum_value_semantics24MultiPayloadEmptyPayload* [[SELF]], i32 0, i32 0
// CHECK-NEXT: store i3 [[TAG]], i3* [[EXTRA_TAG_ADDR]], align 1
// CHECK-NEXT: ret void


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


// -- MultiPayloadNontrivial destroyBuffer
// CHECK: define linkonce_odr hidden void @_TwxxO20enum_value_semantics22MultiPayloadNontrivial(%swift.opaque* [[OBJ:%.*]], %swift.type* %MultiPayloadNontrivial)
// CHECK:      [[ADDR:%.*]] = bitcast %swift.opaque* [[OBJ]] to %O20enum_value_semantics22MultiPayloadNontrivial*
// CHECK-NEXT: [[PAYLOAD_ADDR:%.*]] = bitcast %O20enum_value_semantics22MultiPayloadNontrivial* [[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 %O20enum_value_semantics22MultiPayloadNontrivial, %O20enum_value_semantics22MultiPayloadNontrivial* %0, i32 0, i32 1
// CHECK-NEXT: [[TAG_ADDR:%.*]] = bitcast [1 x i8]* [[T0]] to i3*
// CHECK-NEXT: [[TAG:%.*]] = load i3, i3* [[TAG_ADDR]], align 8
// CHECK-NEXT: switch i3 [[TAG]], label %[[END:[0-9]+]] [
// CHECK:        i3 0, label %[[PAYLOAD1_DESTROY:[0-9]+]]
// CHECK:        i3 2, label %[[PAYLOAD3_DESTROY:[0-9]+]]
// CHECK:      ]
// CHECK:      ; <label>:[[PAYLOAD1_DESTROY]]
// CHECK-NEXT: [[PAYLOAD1_VAL:%.*]] = inttoptr i64 [[PAYLOAD_0]] to %swift.refcounted*
// CHECK-NEXT: call void @rt_swift_release(%swift.refcounted* [[PAYLOAD1_VAL]])
// CHECK-NEXT: br label %[[END]]
// CHECK:      ; <label>:[[PAYLOAD3_DESTROY]]
// CHECK-NEXT: [[PAYLOAD3_1_VAL:%.*]] = inttoptr i64 [[PAYLOAD_1]] to %objc_object*
// CHECK-NEXT: call void @objc_release(%objc_object* [[PAYLOAD3_1_VAL]])
// CHECK-NEXT: br label %[[END]]
// CHECK:      ; <label>:[[END]]
// CHECK-NEXT: ret void


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


// CHECK-LABEL: define linkonce_odr hidden i32 @_TwugO20enum_value_semantics19MultiPayloadGeneric
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics19MultiPayloadGeneric*
// CHECK-NEXT: [[OPAQUE:%.*]] = bitcast %O20enum_value_semantics19MultiPayloadGeneric* [[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 @_TwupO20enum_value_semantics19MultiPayloadGeneric
// CHECK:      ret void


// CHECK-LABEL: define linkonce_odr hidden void @_TwuiO20enum_value_semantics19MultiPayloadGeneric
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics19MultiPayloadGeneric*
// CHECK-NEXT: [[PAYLOAD_TAG:%.*]] = add i32 %tag, 2
// CHECK:      [[OPAQUE:%.*]] = bitcast %O20enum_value_semantics19MultiPayloadGeneric* [[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 @_TwxxO20enum_value_semantics31MultiPayloadNontrivialSpareBits
// CHECK-SAME: (%swift.opaque* [[OBJ:%.*]], %swift.type* %MultiPayloadNontrivialSpareBits) {{.*}} {
// CHECK:      [[ADDR:%.*]] = bitcast %swift.opaque* [[OBJ]] to %O20enum_value_semantics31MultiPayloadNontrivialSpareBits*
// CHECK-NEXT: [[PAYLOAD_ADDR:%.*]] = bitcast %O20enum_value_semantics31MultiPayloadNontrivialSpareBits* [[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:      switch i2 [[SPARE_BITS:%.*]], label %[[END:[0-9]+]] [
// CHECK:        i2 0, label %[[PAYLOAD1_DESTROY:[0-9]+]]
// CHECK:        i2 -2, label %[[PAYLOAD3_DESTROY:[0-9]+]]
// CHECK:      ]
// CHECK:      ; <label>:[[PAYLOAD1_DESTROY]]
// CHECK-NEXT: [[PAYLOAD1_VAL:%.*]] = inttoptr i64 [[PAYLOAD_0]] to %swift.refcounted*
// CHECK-NEXT: call void @rt_swift_release(%swift.refcounted* [[PAYLOAD1_VAL]])
// CHECK-NEXT: br label %[[END]]
// CHECK:      ; <label>:[[PAYLOAD3_DESTROY]]
// CHECK-NEXT: [[MASKED:%.*]] = and i64 [[PAYLOAD_1]]
// CHECK-NEXT: [[PAYLOAD3_1_VAL:%.*]] = inttoptr i64 [[MASKED]] to %objc_object*
// CHECK-NEXT: call void @objc_release(%objc_object* [[PAYLOAD3_1_VAL]])
// CHECK-NEXT: br label %[[END]]
// CHECK:      ; <label>:[[END]]
// CHECK-NEXT: ret void


// CHECK-LABEL: define linkonce_odr hidden i32 @_TwugO20enum_value_semantics31MultiPayloadNontrivialSpareBits
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics31MultiPayloadNontrivialSpareBits*

//   -- Load the payload
// CHECK-NEXT: [[PAYLOAD:%.*]] = bitcast %O20enum_value_semantics31MultiPayloadNontrivialSpareBits* [[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_TMP2:%.*]] = lshr i64 [[SECOND]], 62
// CHECK-NEXT: [[SPARE_TAG_TMP:%.*]] = trunc i64 [[SPARE_TAG_TMP2]] to i2
// CHECK-NEXT: [[SPARE_TAG:%.*]] = zext i2 [[SPARE_TAG_TMP]] 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 @_TwupO20enum_value_semantics31MultiPayloadNontrivialSpareBits
// 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 @_TwuiO20enum_value_semantics31MultiPayloadNontrivialSpareBits
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics31MultiPayloadNontrivialSpareBits*
// 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 %O20enum_value_semantics31MultiPayloadNontrivialSpareBits* [[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 %O20enum_value_semantics31MultiPayloadNontrivialSpareBits* [[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 %O20enum_value_semantics31MultiPayloadNontrivialSpareBits* [[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 @_TwugO20enum_value_semantics33MultiPayloadSpareBitsAndExtraBits
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics33MultiPayloadSpareBitsAndExtraBits*

//   -- Load the payload
// CHECK-NEXT: [[PAYLOAD_ADDR:%.*]] = bitcast %O20enum_value_semantics33MultiPayloadSpareBitsAndExtraBits* [[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 %O20enum_value_semantics33MultiPayloadSpareBitsAndExtraBits, %O20enum_value_semantics33MultiPayloadSpareBitsAndExtraBits* [[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 i2
// CHECK-NEXT: [[SPARE_BITS:%.*]] = and i2 [[SPARE_BITS_TMP]], 1
// CHECK-NEXT: [[EXTRA_TAG:%.*]] = zext i1 [[EXTRA_TAG_TMP]] to i2

//   -- Combine high bits and low bits to form tag
// CHECK-NEXT: [[TAG_TMP:%.*]] = shl i2 [[EXTRA_TAG]], 1
// CHECK-NEXT: [[TAG:%.*]] = or i2 [[SPARE_BITS]], [[TAG_TMP]] 
// CHECK-NEXT: [[RESULT:%.*]] = zext i2 [[TAG]] to i32
// CHECK-NEXT: [[PAYLOAD_TAG:%.*]] = sub i32 [[RESULT]],
// CHECK-NEXT: ret i32 [[PAYLOAD_TAG]]


// CHECK-LABEL: define linkonce_odr hidden void @_TwupO20enum_value_semantics33MultiPayloadSpareBitsAndExtraBits
// 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 @_TwuiO20enum_value_semantics33MultiPayloadSpareBitsAndExtraBits
// CHECK:      [[SELF:%.*]] = bitcast %swift.opaque* %value to %O20enum_value_semantics33MultiPayloadSpareBitsAndExtraBits*
// 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 %O20enum_value_semantics33MultiPayloadSpareBitsAndExtraBits* %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 %O20enum_value_semantics33MultiPayloadSpareBitsAndExtraBits* %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 %O20enum_value_semantics33MultiPayloadSpareBitsAndExtraBits, %O20enum_value_semantics33MultiPayloadSpareBitsAndExtraBits* [[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