// RUN: %target-swift-frontend %s -Xllvm -type-lowering-disable-verification -disable-type-layout -disable-generic-metadata-prespecialization -gnone -emit-ir -enable-objc-interop | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize --check-prefix=CHECK-objc --check-prefix=CHECK-objc-simulator-%target-is-simulator --check-prefix=CHECK-objc-%target-ptrsize --check-prefix=CHECK-%target-os --check-prefix=CHECK-objc-%target-os
// RUN: %target-swift-frontend %s -Xllvm -type-lowering-disable-verification -disable-type-layout -disable-generic-metadata-prespecialization -gnone -emit-ir -disable-objc-interop | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize --check-prefix=CHECK-native --check-prefix=CHECK-native-%target-ptrsize --check-prefix=CHECK-%target-os --check-prefix=CHECK-native-%target-os

// 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.NativeObject)
  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.NativeObject)
  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: @"$s20enum_value_semantics20SinglePayloadTrivialOWV" = internal constant %swift.enum_vwtable {
// CHECK:   ptr @__swift_memcpy9_8,
// CHECK:   ptr @__swift_noop_void_return,
// CHECK:   ptr @__swift_memcpy9_8,
// CHECK:   ptr @__swift_memcpy9_8,
// CHECK:   ptr @__swift_memcpy9_8,
// CHECK:   ptr @__swift_memcpy9_8,
// CHECK:   ptr @"$s20enum_value_semantics20SinglePayloadTrivialOwet",
// CHECK:   ptr @"$s20enum_value_semantics20SinglePayloadTrivialOwst",
// CHECK:   i64 9,
// CHECK:   i64 16,
// CHECK:   i32 2097159,
// CHECK:   i32 0,
// CHECK:   ptr @"$s20enum_value_semantics20SinglePayloadTrivialOwug",
// CHECK:   ptr @"$s20enum_value_semantics20SinglePayloadTrivialOwup",
// CHECK:   ptr @"$s20enum_value_semantics20SinglePayloadTrivialOwui"
// CHECK: }


// CHECK-LABEL: @"$s20enum_value_semantics20SinglePayloadTrivialOMf" =
// CHECK-SAME:   internal constant <{ {{.*}} }> <{
// CHECK-SAME:   ptr @"$s20enum_value_semantics20SinglePayloadTrivialOWV",
// CHECK-SAME:   i64 513,
// CHECK-SAME:   ptr @"$s20enum_value_semantics20SinglePayloadTrivialOMn"
// CHECK-SAME: }>


// CHECK-LABEL: @"$s20enum_value_semantics23SinglePayloadNontrivialOWV" = internal constant %swift.enum_vwtable {
// CHECK:   ptr @"$s20enum_value_semantics23SinglePayloadNontrivialOwCP",
// CHECK:   ptr @"$s20enum_value_semantics23SinglePayloadNontrivialOwxx",
// CHECK:   ptr @"$s20enum_value_semantics23SinglePayloadNontrivialOwcp",
// CHECK:   ptr @"$s20enum_value_semantics23SinglePayloadNontrivialOwca",
// CHECK:   ptr @__swift_memcpy8_8,
// CHECK:   ptr @"$s20enum_value_semantics23SinglePayloadNontrivialOwta",
// CHECK:   i64 8,
// CHECK:   i64 8,
// --           0x210007
// CHECK:   i32 2162695,
// -- On Darwin, the first 4 GiB are unmapped: 0x7ffffffc
// -- Otherwise, one can only assume the first page (4 KiB) is unmapped: 0xffd
// CHECK-ios:       i32 2147483644
// CHECK-macosx:    i32 2147483644
// CHECK-watchos:   i32 2147483644
// CHECK-darwin:    i32 2147483644
// CHECK-objc-linux-gnu:   i32 2045
// CHECK-native-linux-gnu: i32 4093
// CHECK-objc-windows:     i32 2045
// CHECK-native-windows:   i32 4093
// CHECK:   ptr @"$s20enum_value_semantics23SinglePayloadNontrivialOwug",
// CHECK:   ptr @"$s20enum_value_semantics23SinglePayloadNontrivialOwup"
// CHECK:   ptr @"$s20enum_value_semantics23SinglePayloadNontrivialOwui"
// CHECK: ]


// CHECK-LABEL: @"$s20enum_value_semantics23SinglePayloadNontrivialOMf" =
// CHECK-SAME: internal constant <{ {{.*}} }> <{
// CHECK-SAME:   ptr @"$s20enum_value_semantics23SinglePayloadNontrivialOWV",
// CHECK-SAME:   i64 513,
// CHECK-SAME:   ptr @"$s20enum_value_semantics23SinglePayloadNontrivialOMn"
// CHECK-SAME: }>


// CHECK-LABEL: @"$s20enum_value_semantics18GenericFixedLayoutOMn" = hidden constant
// CHECK-SAME:    ptr @"$s20enum_value_semantics18GenericFixedLayoutOMI"
// CHECK-SAME:    @"$s20enum_value_semantics18GenericFixedLayoutOMP"

// CHECK-LABEL: @"$s20enum_value_semantics18GenericFixedLayoutOMP" = internal constant <{ {{.*}} }> <{
//   Instantiation function.
// CHECK-SAME:    i32 trunc (i64 sub (i64 ptrtoint (ptr @"$s20enum_value_semantics18GenericFixedLayoutOMi" to i64), i64 ptrtoint (ptr @"$s20enum_value_semantics18GenericFixedLayoutOMP" to i64)) to i32),
//   Completion function.
// CHECK-SAME:    i32 0,
//   Pattern flags.  0x4020_0000 == (MetadataKind::Enum << 21).
// CHECK-SAME:    i32 1075838976,
//   Value witness table.
// CHECK-SAME:    i32 trunc (i64 sub (i64 ptrtoint (ptr @"$s20enum_value_semantics18GenericFixedLayoutOWV" to i64), i64 ptrtoint (ptr getelementptr inbounds (<{ i32, i32, i32, i32 }>, ptr @"$s20enum_value_semantics18GenericFixedLayoutOMP", i32 0, i32 3) to i64)) to i32)
// CHECK-SAME:  }>

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{{( dllexport)?}}{{( protected)?}} swiftcc void @single_payload_nontrivial_copy_destroy(i64 %0)
// CHECK:      call void @"$s20enum_value_semantics23SinglePayloadNontrivialOWOy"
// CHECK-NEXT: call swiftcc void @single_payload_nontrivial_user
// CHECK-NEXT: call void @"$s20enum_value_semantics23SinglePayloadNontrivialOWOe"
// CHECK-NEXT: ret void

//
// No payload enums
//


// -- NoPayload getEnumTag
// CHECK-LABEL: define internal i32 @"$s20enum_value_semantics9NoPayloadOwug"
// CHECK: [[TAG_ADDR:%.*]] = getelementptr inbounds{{.*}} %T20enum_value_semantics9NoPayloadO, ptr %value, i32 0, i32 0
// CHECK-NEXT: [[TAG:%.*]] = load i8, ptr [[TAG_ADDR]], align 1
// CHECK-NEXT: [[RESULT:%.*]] = zext i8 [[TAG]] to i32
// CHECK-NEXT: ret i32 [[RESULT]]


// -- NoPayload destructiveProjectEnumData
// CHECK-LABEL: define internal void @"$s20enum_value_semantics9NoPayloadOwup"
// CHECK:      ret void


// -- NoPayload destructiveInjectEnumTag
// CHECK-LABEL: define internal void @"$s20enum_value_semantics9NoPayloadOwui"
// CHECK: [[TAG:%.*]] = trunc i32 %tag to i8
// CHECK-NEXT: [[TAG_ADDR:%.*]] = getelementptr inbounds{{.*}} %T20enum_value_semantics9NoPayloadO, ptr %value, i32 0, i32 0
// CHECK-NEXT: store i8 [[TAG]], ptr [[TAG_ADDR]], align 1
// CHECK-NEXT: ret void


//
// Singleton payload enums
//


// -- SingletonPayload getEnumTag
// CHECK-LABEL: define internal i32 @"$s20enum_value_semantics16SingletonPayloadOwug"
// CHECK: ret i32 0


// -- SingletonPayload destructiveProjectEnumData
// CHECK-LABEL: define internal void @"$s20enum_value_semantics16SingletonPayloadOwup"
// CHECK:      ret void


// -- SingletonPayload destructiveInjectEnumTag
// CHECK-LABEL: define internal void @"$s20enum_value_semantics16SingletonPayloadOwui"
// CHECK: ret void


// -- SinglePayloadTrivial getEnumTag
// CHECK-LABEL: define internal i32 @"$s20enum_value_semantics20SinglePayloadTrivialOwug"
// CHECK:  = load
// CHECK:  [[W:%.*]] = load ptr
// CHECK:  [[TAG:%.*]] = call i32 [[W]](ptr noalias %value, i32 3, ptr getelementptr inbounds (%swift.full_existential_type, ptr @"$sBi64_N", i32 0, i32 1))
// CHECK:  ret i32 [[TAG]]


// -- SinglePayloadTrivial destructiveProjectEnumData
// CHECK-LABEL: define internal void @"$s20enum_value_semantics20SinglePayloadTrivialOwup"
// CHECK:      ret void


//
// Single-payload enums
//


// -- SinglePayloadTrivial destructiveInjectEnumTag
// CHECK-LABEL: define internal void @"$s20enum_value_semantics20SinglePayloadTrivialOwui"
// CHECK: = load
// CHECK: [[W:%.*]] = load ptr
// CHECK: call void [[W]](ptr noalias %value, i32 %tag, i32 3, ptr getelementptr inbounds (%swift.full_existential_type, ptr @"$sBi64_N", i32 0, i32 1))
// CHECK-NEXT: ret void


// -- SinglePayloadNontrivial destroyBuffer
// CHECK: define internal void @"$s20enum_value_semantics23SinglePayloadNontrivialOwxx"(ptr noalias [[OBJ:%.*]], ptr %SinglePayloadNontrivial) {{.*}} {
// CHECK: [[PAYLOAD:%.*]] = load i64, ptr [[OBJ]], align 8
// CHECK-NEXT: switch i64 %0, label %[[RELEASE_PAYLOAD:[0-9]+]] [
// CHECK:        i64 0, label %[[DONE:[0-9]+]]
// CHECK-native:      i64 1, label %[[DONE]]
// CHECK-native:      i64 2, label %[[DONE]]
// CHECK-objc-simulator-false:        i64 2, label %[[DONE]]
// CHECK-objc-simulator-false:        i64 4, label %[[DONE]]
// CHECK-objc-simulator-true:        i64 1, label %[[DONE]]
// CHECK-objc-simulator-true:        i64 2, label %[[DONE]]
// CHECK:      ]

// CHECK:      [[RELEASE_PAYLOAD]]:
// CHECK-NEXT: [[DATA:%.*]] = load ptr, ptr [[OBJ]], align 8
// CHECK-NEXT: call void @swift_release(ptr [[DATA]])
// CHECK-NEXT: br label %[[DONE]]

// CHECK:      [[DONE]]:
// CHECK-NEXT: ret void


//
// Multi-payload enums
//


// -- MultiPayloadTrivial getEnumTag
// CHECK-LABEL: define internal i32 @"$s20enum_value_semantics19MultiPayloadTrivialOwug"


//   -- Load the low bits of the tag from the payload area
// CHECK: [[NO_PAYLOAD_TAG_TMP:%.*]] = load i64, ptr %value, 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, ptr %value, i32 0, i32 1
// CHECK-NEXT: [[EXTRA_TAG_TMP:%.*]] = load i8, ptr [[EXTRA_TAG_ADDR_TMP]], align 8
// CHECK-NEXT: [[EXTRA_TAG:%.*]] = zext i8 [[EXTRA_TAG_TMP]] to i32

// CHECK-NEXT: [[NO_PAYLOAD_TAG:%.*]] = trunc i64 [[NO_PAYLOAD_TAG_TMP]] to i32
// CHECK-NEXT: [[NO_PAYLOAD_TAG2:%.*]] = add i32 [[NO_PAYLOAD_TAG]], 2

//   -- Check if we have a payload or not
// CHECK-NEXT: [[IS_PAYLOAD:%.*]] = icmp uge i32 [[EXTRA_TAG]], 2
// CHECK-NEXT: [[TAG:%.*]] = select i1 [[IS_PAYLOAD]], i32 [[NO_PAYLOAD_TAG2]], i32 [[EXTRA_TAG]]

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

// -- MultiPayloadTrivial destructiveProjectEnumData
// CHECK-LABEL: define internal void @"$s20enum_value_semantics19MultiPayloadTrivialOwup"
// CHECK:      ret void


// -- MultiPayloadTrivial destructiveInjectEnumTag
// CHECK-LABEL: define internal void @"$s20enum_value_semantics19MultiPayloadTrivialOwui"
// CHECK: [[IS_PAYLOAD:%.*]] = icmp uge i32 %tag, 2
// CHECK-NEXT: br i1 [[IS_PAYLOAD]], label %[[HAS_NO_PAYLOAD:.*]], label %[[HAS_PAYLOAD:.*]]

// CHECK:      [[HAS_NO_PAYLOAD]]:

//   -- Compute the no-payload tag
// CHECK-NEXT: [[NO_PAYLOAD_TAG:%.*]] = sub i32 %tag, 2
// CHECK-NEXT: [[NO_PAYLOAD_TAG2:%.*]] = zext i32 [[NO_PAYLOAD_TAG]] to i64

//   -- Store the low bits of the tag in the payload area
// CHECK-NEXT: store i64 [[NO_PAYLOAD_TAG2]], ptr %value, 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, ptr %value, i32 0, i32 1
// CHECK-NEXT: store i8 2, ptr [[EXTRA_TAG_ADDR_TMP]], align 8
// CHECK-NEXT: br label %[[DONE:.*]]

// CHECK:      [[HAS_PAYLOAD]]:

//   -- Store the tag in the extra tag area
// CHECK-NEXT: [[TAG:%.*]] = trunc i32 %tag to i8
// CHECK-NEXT: [[EXTRA_TAG_ADDR_TMP:%.*]] = getelementptr inbounds{{.*}} %T20enum_value_semantics19MultiPayloadTrivialO, ptr %value, i32 0, i32 1
// CHECK-NEXT: store i8 [[TAG]], ptr [[EXTRA_TAG_ADDR_TMP]], align 8
// CHECK-NEXT: br label %[[DONE]]

// CHECK:      [[DONE]]:
// CHECK-NEXT: ret void


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


// -- MultiPayloadNoEmptyCases getEnumTag
// CHECK-LABEL: define internal i32 @"$s20enum_value_semantics24MultiPayloadNoEmptyCasesOwug"
// CHECK: [[NO_PAYLOAD_TAG_TMP:%.*]] = load i64, ptr %value, 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, ptr %value, i32 0, i32 1
// CHECK-NEXT: [[EXTRA_TAG_TMP:%.*]] = load i8, ptr [[EXTRA_TAG_ADDR_TMP]], align 8
// CHECK-NEXT: [[EXTRA_TAG:%.*]] = zext i8 [[EXTRA_TAG_TMP]] to i32
// CHECK-NEXT: ret i32 [[EXTRA_TAG]]

// -- MultiPayloadNoEmptyCases destructiveProjectEnumData
// CHECK-LABEL: define internal void @"$s20enum_value_semantics24MultiPayloadNoEmptyCasesOwup"
// CHECK:      ret void


// -- MultiPayloadNoEmptyCases destructiveInjectEnumTag
// CHECK-LABEL: define internal void @"$s20enum_value_semantics24MultiPayloadNoEmptyCasesOwui"
// CHECK: [[TAG:%.*]] = trunc i32 %tag to i8

//   -- Store the tag in the extra tag area
// CHECK-NEXT: [[EXTRA_TAG_ADDR_TMP:%.*]] = getelementptr inbounds{{.*}} %T20enum_value_semantics24MultiPayloadNoEmptyCasesO, ptr %value, i32 0, i32 1
// CHECK-NEXT: store i8 [[TAG]], ptr [[EXTRA_TAG_ADDR_TMP]], align 8
// CHECK-NEXT: ret void


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


// -- MultiPayloadEmptyPayload getEnumTag
// CHECK-LABEL: define internal i32 @"$s20enum_value_semantics017MultiPayloadEmptyE0Owug"

//   -- Load the tag from the extra tag area
// CHECK: [[EXTRA_TAG_ADDR:%.*]] = getelementptr inbounds{{.*}} %T20enum_value_semantics017MultiPayloadEmptyE0O, ptr %value, i32 0, i32 0
// CHECK-NEXT: [[EXTRA_TAG_TMP:%.*]] = load i8, ptr [[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 internal void @"$s20enum_value_semantics017MultiPayloadEmptyE0Owup"
// CHECK:      ret void


// -- MultiPayloadEmptyPayload destructiveInjectEnumTag
// CHECK-LABEL: define internal void @"$s20enum_value_semantics017MultiPayloadEmptyE0Owui"

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


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


// -- MultiPayloadNontrivial destroyBuffer
// CHECK: define internal void @"$s20enum_value_semantics22MultiPayloadNontrivialOwxx"(ptr noalias [[OBJ:%.*]], ptr %MultiPayloadNontrivial)
// CHECK: [[PAYLOAD_0_ADDR:%.*]] = getelementptr
// CHECK-NEXT: [[PAYLOAD_0:%.*]] = load i64, ptr [[PAYLOAD_0_ADDR]], align 8
// CHECK-NEXT: [[PAYLOAD_1_ADDR:%.*]] = getelementptr
// CHECK-NEXT: [[PAYLOAD_1:%.*]] = load i64, ptr [[PAYLOAD_1_ADDR]], align 8
// CHECK: [[T0:%.*]] = getelementptr inbounds{{.*}} %T20enum_value_semantics22MultiPayloadNontrivialO, ptr [[OBJ]], i32 0, i32 1
// CHECK-NEXT: [[TAG:%.*]] = load i8, ptr [[T0]], align 8
// CHECK-NEXT: @"$s20enum_value_semantics22MultiPayloadNontrivialOWOe"
// CHECK-NEXT: ret void


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


// CHECK-LABEL: define internal i32 @"$s20enum_value_semantics19MultiPayloadGenericOwug"
// CHECK: [[TAG:%.*]] = call i32 @swift_getEnumCaseMultiPayload(ptr %value, ptr %"MultiPayloadGeneric<T>")
// CHECK-NEXT: ret i32 [[TAG]]


// CHECK-LABEL: define internal void @"$s20enum_value_semantics19MultiPayloadGenericOwup"
// CHECK:      ret void


// CHECK-LABEL: define internal void @"$s20enum_value_semantics19MultiPayloadGenericOwui"
// CHECK: call void @swift_storeEnumTagMultiPayload(ptr %value, ptr %"MultiPayloadGeneric<T>", i32 %tag)
// CHECK-NEXT: ret void


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


// -- MultiPayloadNontrivialSpareBits destroyBuffer
// CHECK-LABEL: define internal void @"$s20enum_value_semantics31MultiPayloadNontrivialSpareBitsOwxx"
// CHECK-SAME: (ptr noalias [[OBJ:%.*]], ptr %MultiPayloadNontrivialSpareBits) {{.*}} {
// CHECK: [[PAYLOAD_0_ADDR:%.*]] = getelementptr
// CHECK-NEXT: [[PAYLOAD_0:%.*]] = load i64, ptr [[PAYLOAD_0_ADDR]], align 8
// CHECK-NEXT: [[PAYLOAD_1_ADDR:%.*]] = getelementptr
// CHECK-NEXT: [[PAYLOAD_1:%.*]] = load i64, ptr [[PAYLOAD_1_ADDR]], align 8
// CHECK:      call void @"$s20enum_value_semantics31MultiPayloadNontrivialSpareBitsOWOe"
// CHECK-NEXT: ret void


// CHECK-LABEL: define internal i32 @"$s20enum_value_semantics31MultiPayloadNontrivialSpareBitsOwug"

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

//   -- Get the low bits of the tag from the payload area
// CHECK-NEXT: [[NO_PAYLOAD_TAG:%.*]] = trunc i64 [[FIRST]] to i32
// CHECK-NEXT: [[NO_PAYLOAD_TAG2:%.*]] = add i32 [[NO_PAYLOAD_TAG]], 3

//   -- Check if we have a payload or not
// CHECK-NEXT: [[IS_PAYLOAD:%.*]] = icmp uge i32 [[SPARE_TAG]], 3

//   -- Return the tag
// CHECK-NEXT: [[TAG:%.*]] = select i1 [[IS_PAYLOAD]], i32 [[NO_PAYLOAD_TAG2]], i32 [[SPARE_TAG]]
// CHECK-NEXT: ret i32 [[TAG]]

// CHECK-LABEL: define internal void @"$s20enum_value_semantics31MultiPayloadNontrivialSpareBitsOwup"

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

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

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


// CHECK-LABEL: define internal void @"$s20enum_value_semantics31MultiPayloadNontrivialSpareBitsOwui"
// CHECK: [[IS_PAYLOAD:%.*]] = icmp uge i32 %tag, 3
// CHECK-NEXT: br i1 [[IS_PAYLOAD]], label %[[HAS_NO_PAYLOAD:.*]], label %[[HAS_PAYLOAD:.*]]

// CHECK:      [[HAS_NO_PAYLOAD]]:

//   -- Turn the case index into a no-payload case index
// CHECK-NEXT: [[NO_PAYLOAD_TAG:%.*]] = sub i32 %tag, 3
// CHECK-NEXT: [[NO_PAYLOAD_TAG2:%.*]] = zext i32 [[NO_PAYLOAD_TAG]] to i64

//   -- Store the low bits of the tag into the payload
// CHECK-NEXT: [[FIRST_ADDR:%.*]] = getelementptr inbounds{{.*}} { i64, i64 }, ptr %value, i32 0, i32 0
// CHECK-NEXT: store i64 [[NO_PAYLOAD_TAG2]], ptr [[FIRST_ADDR]], align 8

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

// CHECK:      [[HAS_PAYLOAD]]:

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

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

//   -- Mask off spare bits in the payload               -- 0x00fffffffffffff8
// CHECK-NEXT: [[SECOND_PROJ:%.*]] = and i64 [[SECOND]], 72057594037927928

//   -- 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 [[SPARE_TAG_TMP]], [[SECOND_PROJ]]

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

// CHECK:      [[END]]:
// CHECK-NEXT: ret void


// CHECK-LABEL: define internal i32 @"$s20enum_value_semantics029MultiPayloadSpareBitsAndExtraG0Owug"

//   -- Load the payload
// CHECK: [[PAYLOAD:%.*]] = load i64, ptr %value, 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, ptr %value, i32 0, i32 1
// CHECK-NEXT: [[EXTRA_TAG:%.*]] = load i8, ptr [[EXTRA_TAG_ADDR_TMP]], 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

//   -- 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: ret i32 [[RESULT]]


// CHECK-LABEL: define internal void @"$s20enum_value_semantics029MultiPayloadSpareBitsAndExtraG0Owup"
// CHECK: [[PAYLOAD:%.*]] = load i64, ptr %value, align 8
//                                                         -- 0x7fffffffffffffff
// CHECK-NEXT: [[PAYLOAD_PROJ:%.*]] = and i64 [[PAYLOAD]], 9223372036854775807
// CHECK-NEXT: store i64 [[PAYLOAD_PROJ]], ptr %value, align 8
// CHECK-NEXT: ret void


// CHECK-LABEL: define internal void @"$s20enum_value_semantics029MultiPayloadSpareBitsAndExtraG0Owui"
// CHECK: [[SPARE_TAG_TMP3:%.*]] = and i32 %tag, 1

//   -- Load the payload
// CHECK-NEXT: [[PAYLOAD:%.*]] = load i64, ptr {{.*}}, 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 [[SPARE_TAG]], [[PAYLOAD_PROJ]]

//   -- Store the payload
// CHECK-NEXT: store i64 [[PAYLOAD_NEW]], ptr {{.*}}, align 8

//   -- Store high bits of tag in extra tag area
// CHECK-NEXT: [[EXTRA_TAG_TMP:%.*]] = lshr i32 %tag, 1
// CHECK-NEXT: [[EXTRA_TAG:%.*]] = trunc i32 [[EXTRA_TAG_TMP]] to i8
// CHECK-NEXT: [[EXTRA_TAG_ADDR_TMP:%.*]] = getelementptr inbounds{{.*}} %T20enum_value_semantics029MultiPayloadSpareBitsAndExtraG0O, ptr %value, i32 0, i32 1
// CHECK-NEXT: store i8 [[EXTRA_TAG]], ptr [[EXTRA_TAG_ADDR_TMP]], align 8
// CHECK-NEXT: ret void