// RUN: %target-swift-frontend -assume-parsing-unqualified-ownership-sil %s -gnone -emit-ir -disable-objc-attr-requires-foundation-module | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize --check-prefix=CHECK-%target-runtime-%target-ptrsize

// REQUIRES: CPU=i386_or_x86_64

// We have to claim this is raw SIL because there are critical edges from non
// cond_br instructions.
sil_stage raw

import Builtin
import Swift

// -- Singleton enum. The representation is just the singleton payload.
// CHECK: %T4enum9SingletonO = type <{ <{ i64, i64 }> }>

// -- Singleton enum with heap object ref payload. <rdar://problem/15679353>
// CHECK: %T4enum12SingletonRefO = type <{ %swift.refcounted* }>

// -- No-payload enums. The representation is just an enum tag.
// CHECK: %T4enum10NoPayloadsO = type <{ i8 }>
// CHECK: %T4enum11NoPayloads2O = type <{ i8 }>

// -- Single-payload enum, no extra inhabitants in the payload type. The
//    representation adds a tag bit to distinguish payload from enum tag:
//      case x(i64): X0 X1 X2 ... X63 | 0, where X0...X63 are the payload bits
//      case y:      0  0  0  ... 0   | 1
//      case z:      1  0  0  ... 0   | 1
// CHECK-64: %T4enum17SinglePayloadNoXIO = type <{ [8 x i8], [1 x i8] }>
// CHECK-64: %T4enum18SinglePayloadNoXI2O = type <{ [8 x i8], [1 x i8] }>
// CHECK-32: %T4enum17SinglePayloadNoXIO = type <{ [4 x i8], [1 x i8] }>
// CHECK-32: %T4enum18SinglePayloadNoXI2O = type <{ [4 x i8], [1 x i8] }>

// -- Single-payload enum, spare bits. The representation uses a tag bit
//    out of the payload to distinguish payload from enum tag:
//      case x(i3): X0 X1 X2 0 0 0 0 0
//      case y:     0  0  0  1 0 0 0 0
//      case z:     1  0  0  1 0 0 0 0
// CHECK: %T4enum21SinglePayloadSpareBitO = type <{ [8 x i8] }>

// -- Single-payload enum containing a no-payload enum as its payload.
//    The representation takes extra inhabitants starting after the greatest
//    discriminator value used by the nested no-payload enum.
// CHECK: %T4enum19SinglePayloadNestedO = type <{ [1 x i8] }>

// -- Single-payload enum containing another single-payload enum as its
//    payload.
//    The representation takes extra inhabitants from the nested enum's payload
//    that were unused by the nested enum.
// CHECK: %T4enum019SinglePayloadNestedD0O = type <{ [1 x i8] }>

// -- Multi-payload enum, no spare bits. The representation adds tag bits
//    to discriminate payloads. No-payload cases all share a tag.
//      case x(i8): X0 X1 X2 ... X7 X8 | 0 0
//      case y(i7): Y0 Y1 Y2 ... Y7 0  | 1 0
//      case z(i2): Z0 Z1 0  ... 0  0  | 0 1
//      case a:     0  0  0  ... 0  0  | 1 1
//      case b:     1  0  0  ... 0  0  | 1 1
//      case c:     0  1  0  ... 0  0  | 1 1
// CHECK: %T4enum23MultiPayloadNoSpareBitsO = type <{ [8 x i8], [1 x i8] }>

// -- Multi-payload enum, one spare bit. The representation uses spare bits
//    common to all payloads to partially discriminate payloads, with added
//    tag bits to cover the gap. No-payload cases all share a tag.
//      case x(i7): X0 X1 X2 X3 X4 X5 X6 0 | 0
//      case y(i1): Y  0  0  0  0  0  0  1 | 0
//      case z(i5): Z0 Z1 Z2 Z3 Z4 0  0  0 | 1
//      case a:     0  0  0  0  0  0  0  1 | 1
//      case b:     1  0  0  0  0  0  0  1 | 1
//      case c:     0  1  0  0  0  0  0  1 | 1
// CHECK: %T4enum23MultiPayloadOneSpareBitO = type <{ [8 x i8], [1 x i8] }>

// -- Multi-payload enum, two spare bits. Same as above, except we have enough
//    spare bits not to require any added tag bits.
//      case x(i6): X0 X1 X2 X3 X4 X5 0  0
//      case y(i1): Y  0  0  0  0  0  1  0
//      case z(i5): Z0 Z1 Z2 Z3 Z4 0  0  1
//      case a:     0  0  0  0  0  0  1  1
//      case b:     1  0  0  0  0  0  1  1
//      case c:     0  1  0  0  0  0  1  1
// CHECK: %T4enum24MultiPayloadTwoSpareBitsO = type <{ [8 x i8] }>

// CHECK-64: %T4enum30MultiPayloadSpareBitAggregatesO = type <{ [16 x i8] }>

// CHECK-64: %T4enum18MultiPayloadNestedO = type <{ [9 x i8] }>
// CHECK-32: %T4enum18MultiPayloadNestedO = type <{ [5 x i8] }>

// 32-bit object references don't have enough spare bits.
// CHECK-64: %T4enum27MultiPayloadNestedSpareBitsO = type <{ [8 x i8] }>

// -- Dynamic enums. The type layout is opaque; we dynamically bitcast to
//    the element type.
// CHECK: %T4enum20DynamicSinglePayloadO = type <{}>
// CHECK: [[DYNAMIC_SINGLE_EMPTY_PAYLOAD:%T4enum20DynamicSinglePayloadOyytG]] = type <{ [1 x i8] }>

// -- Address-only multi-payload enums. We can't use spare bits.
// CHECK-64: %T4enum32MultiPayloadAddressOnlySpareBitsO = type <{ [16 x i8], [1 x i8] }>
// CHECK-32: %T4enum32MultiPayloadAddressOnlySpareBitsO = type <{ [8 x i8], [1 x i8] }>

// CHECK: [[DYNAMIC_SINGLETON:%T4enum16DynamicSingletonO.*]] = type <{}>

// CHECK: %T4enum40MultiPayloadLessThan32BitsWithEmptyCasesO = type <{ [1 x i8], [1 x i8] }>

// -- Dynamic metadata template carries a value witness table pattern
//    we fill in on instantiation.
//    The witness table pattern includes extra inhabitant witness
//    implementations which are used if the instance has extra inhabitants.
//    FIXME: Strings should be unnamed_addr. rdar://problem/22674524
// CHECK: [[DYNAMICSINGLETON_FIELD_NAMES:@.*]] = private constant [7 x i8] c"value\00\00"
// CHECK: [[DYNAMICSINGLETON_NAME:@.*]] = private constant [25 x i8] c"4enum16DynamicSingletonO\00"
// CHECK: @_T04enum16DynamicSingletonOMn = hidden constant <{ {{.*}} i32 }> <{
// CHECK:   [25 x i8]* [[DYNAMICSINGLETON_NAME]]
// --       One payload
// CHECK:   i32 1,
// --       No empty cases
// CHECK:   i32 0,
// --       Case names
// CHECK:   [[DYNAMICSINGLETON_FIELD_NAMES]]
// --       Case type accessor
// CHECK:   @get_field_types_DynamicSingleton
// --       generic parameter vector offset
// CHECK:   i32 3,
// --       generic parameter vector length; witness table counts
// CHECK:   i32 1, i32 0
// CHECK: }>

// CHECK: @_T04enum16DynamicSingletonOMP = internal global <{ {{.*}}, [26 x i8*] }> <{
// CHECK:   %swift.type* (%swift.type_pattern*, i8**)* @create_generic_metadata_DynamicSingleton
// CHECK:   @_T04enum16DynamicSingletonOMn
// CHECK:   i8* null
// CHECK:   i8* bitcast (void (%swift.opaque*, i32, %swift.type*)* @_T04enum16DynamicSingletonOwxs to i8*)
// CHECK:   i8* bitcast (i32 (%swift.opaque*, %swift.type*)* @_T04enum16DynamicSingletonOwxg to i8*)

// -- No-payload enums have extra inhabitants in
//    their value witness table.
// CHECK: @_T04enum10NoPayloadsOWV = internal constant [26 x i8*] [
// -- ...
// -- size
// CHECK:   i8* inttoptr ([[WORD:i32|i64]] 1 to i8*),
// -- flags                 0x24_0000 - alignment 1, has extra inhabitants and enum witnesses
// CHECK:   i8* inttoptr ([[WORD]] 2359296 to i8*),
// -- stride
// CHECK:   i8* inttoptr ([[WORD]] 1 to i8*),
// -- num extra inhabitants (256 - 3 valid states)
// CHECK:   i8* inttoptr ([[WORD]] 253 to i8*)
// -- storeExtraInhabitant
// CHECK:   i8* bitcast (void (%swift.opaque*, i32, %swift.type*)* @_T04enum10NoPayloadsOwxs to i8*)
// -- getExtraInhabitantIndex
// CHECK:   i8* bitcast (i32 (%swift.opaque*, %swift.type*)* @_T04enum10NoPayloadsOwxg to i8*)
// CHECK: ]

// -- Single-payload enums take unused extra inhabitants from their payload
//    as their own.
// CHECK: @_T04enum19SinglePayloadNestedOWV = internal constant [26 x i8*] [
// -- ...
// -- size
// CHECK:   i8* inttoptr ([[WORD]] 1 to i8*),
// -- flags                 0x4_0000 - alignment 1, has extra inhabitants
// CHECK:   i8* inttoptr ([[WORD]] 2359296 to i8*),
// -- stride
// CHECK:   i8* inttoptr ([[WORD]] 1 to i8*),
// -- num extra inhabitants (253 from payload - 3 empty cases)
// CHECK:   i8* inttoptr ([[WORD]] 250 to i8*)
// -- storeExtraInhabitant
// CHECK:   i8* bitcast (void (%swift.opaque*, i32, %swift.type*)* @_T04enum19SinglePayloadNestedOwxs to i8*)
// -- getExtraInhabitantIndex
// CHECK:   i8* bitcast (i32 (%swift.opaque*, %swift.type*)* @_T04enum19SinglePayloadNestedOwxg to i8*)
// CHECK: ]


// CHECK: @_T04enum20DynamicSinglePayloadOMP = internal global <{ {{.*}}, [26 x i8*] }> <{
// CHECK:   %swift.type* (%swift.type_pattern*, i8**)* @create_generic_metadata_DynamicSinglePayload
// CHECK:   i8* null
// CHECK:   i8* bitcast (void (%swift.opaque*, i32, %swift.type*)* @_T04enum20DynamicSinglePayloadOwxs to i8*)
// CHECK:   i8* bitcast (i32 (%swift.opaque*, %swift.type*)* @_T04enum20DynamicSinglePayloadOwxg to i8*)

// CHECK: @_T04enum18MultiPayloadNestedOWV = internal constant [26 x i8*] [
// CHECK:   i8* inttoptr ([[WORD]] 9 to i8*),
// CHECK:   i8* inttoptr ([[WORD]] 16 to i8*)
// CHECK: ]

enum Empty {}

enum EmptySingleton {
  case foo
}

enum Singleton {
  case value(Builtin.Int64, Builtin.Int64)
}

enum SingletonRef {
  case value(Builtin.NativeObject)
}

enum DynamicSingleton<T> {
  case value(T)
}

// CHECK-64: define{{( protected)?}} swiftcc void @singleton_switch(i64, i64) {{.*}} {
// CHECK-32: define{{( protected)?}} swiftcc void @singleton_switch(%T4enum9SingletonO* noalias nocapture dereferenceable(16)) {{.*}} {
sil @singleton_switch : $(Singleton) -> () {
// CHECK-64: entry:
// CHECK-32: entry:
entry(%u : $Singleton):
// CHECK-64:   br label %[[DEST:[0-9]+]]
// CHECK-32:   br label %[[DEST:[0-9]+]]
  switch_enum %u : $Singleton, case #Singleton.value!enumelt.1: dest

// CHECK-64: ; <label>:[[DEST]]
// CHECK-32: ; <label>:[[DEST]]
dest:
// CHECK-64:   ret void
// CHECK-32:   ret void
  %x = tuple ()
  return %x : $()
}

// CHECK-64: define{{( protected)?}} swiftcc void @singleton_switch_arg(i64, i64) {{.*}} {
// CHECK-32: define{{( protected)?}} swiftcc void @singleton_switch_arg(%T4enum9SingletonO* noalias nocapture dereferenceable(16)) {{.*}} {
sil @singleton_switch_arg : $(Singleton) -> () {
// CHECK-64: entry:
// CHECK-32: entry:
entry(%u : $Singleton):
// CHECK-32:  [[CAST:%.*]] = bitcast %T4enum9SingletonO* %0 to <{ i64, i64 }>*
// CHECK-32:  [[GEP1:%.*]] = getelementptr inbounds <{ i64, i64 }>, <{ i64, i64 }>* [[CAST]], i32 0, i32 0
// CHECK-32:  [[ELT1:%.*]] = load i64, i64* [[GEP1]]
// CHECK-32:  [[GEP2:%.*]] = getelementptr inbounds <{ i64, i64 }>, <{ i64, i64 }>* [[CAST]], i32 0, i32 1
// CHECK-32:  [[ELT2:%.*]] = load i64, i64* [[GEP2]]
// CHECK-64:   br label %[[PREDEST:[0-9]+]]
// CHECK-32:   br label %[[PREDEST:[0-9]+]]
  switch_enum %u : $Singleton, case #Singleton.value!enumelt.1: dest

// CHECK-64: ; <label>:[[PREDEST]]
// CHECK-64:   br label %[[DEST:[0-9]+]]
// CHECK-64: ; <label>:[[DEST]]
// CHECK-32: ; <label>:[[PREDEST]]
// CHECK-32:   br label %[[DEST:[0-9]+]]
// CHECK-32: ; <label>:[[DEST]]
dest(%u2 : $(Builtin.Int64, Builtin.Int64)):
// CHECK-64:   {{%.*}} = phi i64 [ %0, %[[PREDEST]] ]
// CHECK-64:   {{%.*}} = phi i64 [ %1, %[[PREDEST]] ]
// CHECK-64:   ret void
// CHECK-32:   {{%.*}} = phi i64 [ [[ELT1]], %[[PREDEST]] ]
// CHECK-32:   {{%.*}} = phi i64 [ [[ELT2]], %[[PREDEST]] ]
// CHECK-32:   ret void
  %x = tuple ()
  return %x : $()
}

// CHECK: define{{( protected)?}} swiftcc void @singleton_switch_indirect(%T4enum9SingletonO* nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK: entry:
// CHECK:   br label %[[DEST:[0-9]+]]
// CHECK: ; <label>:[[DEST]]
// CHECK:   [[ADDR:%.*]] = bitcast %T4enum9SingletonO* %0 to <{ i64, i64 }>*
// CHECK:   ret void
// CHECK: }
sil @singleton_switch_indirect : $(@inout Singleton) -> () {
entry(%u : $*Singleton):
  switch_enum_addr %u : $*Singleton, case #Singleton.value!enumelt.1: dest
dest:
  %u2 = unchecked_take_enum_data_addr %u : $*Singleton, #Singleton.value!enumelt.1
  %x = tuple ()
  return %x : $()
}

// CHECK-64: define{{( protected)?}} swiftcc { i64, i64 } @singleton_inject(i64, i64) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[A:%.*]] = insertvalue { i64, i64 } undef, i64 %0, 0
// CHECK-64:   [[B:%.*]] = insertvalue { i64, i64 } [[A]], i64 %1, 1
// CHECK-64:   ret { i64, i64 } [[B]]
// CHECK-64: }
// CHECK-32: define{{( protected)?}} swiftcc void @singleton_inject(%T4enum9SingletonO* noalias nocapture sret, i64, i64) {{.*}} {
// CHECK-32: entry:
// CHECK-32:  [[CAST:%.*]] = bitcast %T4enum9SingletonO* %0 to <{ i64, i64 }>*
// CHECK-32:  [[GEP1:%.*]] = getelementptr inbounds <{ i64, i64 }>, <{ i64, i64 }>* [[CAST]], i32 0, i32 0
// CHECK-32:                 store i64 %1, i64* [[GEP1]]
// CHECK-32:  [[GEP2:%.*]] = getelementptr inbounds <{ i64, i64 }>, <{ i64, i64 }>* [[CAST]], i32 0, i32 1
// CHECK-32:                 store i64 %2, i64* [[GEP2]]
// CHECK-32:  ret void
// CHECK-32: }
sil @singleton_inject : $(Builtin.Int64, Builtin.Int64) -> Singleton {
entry(%0 : $Builtin.Int64, %1 : $Builtin.Int64):
  %t = tuple (%0 : $Builtin.Int64, %1 : $Builtin.Int64)
  %u = enum $Singleton, #Singleton.value!enumelt.1, %t : $(Builtin.Int64, Builtin.Int64)
  return %u : $Singleton
}

// CHECK: define{{( protected)?}} swiftcc void @singleton_inject_indirect(i64, i64, %T4enum9SingletonO* nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK: entry:
// CHECK:   [[DATA_ADDR:%.*]] = bitcast %T4enum9SingletonO* %2 to <{ i64, i64 }>*
// CHECK:   [[DATA_0_ADDR:%.*]] = getelementptr inbounds <{ i64, i64 }>, <{ i64, i64 }>* [[DATA_ADDR]], i32 0, i32 0
// CHECK:   store i64 %0, i64* [[DATA_0_ADDR]]
// CHECK:   [[DATA_1_ADDR:%.*]] = getelementptr inbounds <{ i64, i64 }>, <{ i64, i64 }>* [[DATA_ADDR]], i32 0, i32 1
// CHECK:   store i64 %1, i64* [[DATA_1_ADDR]]
// CHECK:   ret void
// CHECK: }
sil @singleton_inject_indirect : $(Builtin.Int64, Builtin.Int64, @inout Singleton) -> () {
entry(%0 : $Builtin.Int64, %1 : $Builtin.Int64, %2 : $*Singleton):
  %t = tuple (%0 : $Builtin.Int64, %1 : $Builtin.Int64)
  %a = init_enum_data_addr %2 : $*Singleton, #Singleton.value!enumelt.1
  store %t to %a : $*(Builtin.Int64, Builtin.Int64)
  inject_enum_addr %2 : $*Singleton, #Singleton.value!enumelt.1
  %v = tuple ()
  return %v : $()
}


enum NoPayloads {
  case x
  case y
  case z
}

sil @a : $@convention(thin) () -> ()
sil @b : $@convention(thin) () -> ()
sil @c : $@convention(thin) () -> ()
sil @d : $@convention(thin) () -> ()
sil @e : $@convention(thin) () -> ()
sil @f : $@convention(thin) () -> ()


// CHECK: define{{( protected)?}} swiftcc void @no_payload_switch(i8) {{.*}} {
sil @no_payload_switch : $@convention(thin) (NoPayloads) -> () {
// CHECK: entry:
entry(%u : $NoPayloads):
// CHECK:   switch i8 %0, label %[[DFLT:[0-9]+]] [
// CHECK:     i8 0, label %[[X_DEST:[0-9]+]]
// CHECK:     i8 1, label %[[Y_DEST:[0-9]+]]
// CHECK:     i8 2, label %[[Z_DEST:[0-9]+]]
// CHECK:   ]
// CHECK: ; <label>:[[DFLT]]
// CHECK:   unreachable
  switch_enum %u : $NoPayloads, case #NoPayloads.x!enumelt: x_dest, case #NoPayloads.y!enumelt: y_dest, case #NoPayloads.z!enumelt: z_dest

// CHECK: ; <label>:[[X_DEST]]
// CHECK:   call swiftcc void @a()
// CHECK:   br label %[[END:[0-9]+]]
x_dest:
  %a = function_ref @a : $@convention(thin) () -> ()
  apply %a() : $@convention(thin) () -> ()
  br end
// CHECK: ; <label>:[[Y_DEST]]
// CHECK:   call swiftcc void @b()
// CHECK:   br label %[[END]]
y_dest:
  %b = function_ref @b : $@convention(thin) () -> ()
  apply %b() : $@convention(thin) () -> ()
  br end
// CHECK: ; <label>:[[Z_DEST]]
// CHECK:   call swiftcc void @c()
// CHECK:   br label %[[END]]
z_dest:
  %c = function_ref @c : $@convention(thin) () -> ()
  apply %c() : $@convention(thin) () -> ()
  br end

// CHECK: ; <label>:[[END]]
// CHECK:   ret void
end:
  %x = tuple ()
  return %x : $()
}

// CHECK: define{{( protected)?}} swiftcc void @no_payload_switch_indirect(%T4enum10NoPayloadsO* nocapture dereferenceable({{.*}})) {{.*}} {
sil @no_payload_switch_indirect : $@convention(thin) (@inout NoPayloads) -> () {
entry(%u : $*NoPayloads):
// CHECK:   [[TAG_ADDR:%.*]] = getelementptr inbounds %T4enum10NoPayloadsO, %T4enum10NoPayloadsO* %0, i32 0, i32 0
// CHECK:   [[TAG:%.*]] = load i8, i8* [[TAG_ADDR]]
// CHECK:   switch i8 [[TAG]]
  switch_enum_addr %u : $*NoPayloads, case #NoPayloads.x!enumelt: x_dest, case #NoPayloads.y!enumelt: y_dest, case #NoPayloads.z!enumelt: z_dest

x_dest:
  br end
y_dest:
  br end
z_dest:
  br end
end:
  %x = tuple ()
  return %x : $()
}

// CHECK: define{{( protected)?}} swiftcc i8 @no_payload_inject_x() {{.*}} {
// CHECK: entry:
// CHECK:   ret i8 0
// CHECK: }
sil @no_payload_inject_x : $() -> NoPayloads {
entry:
  %u = enum $NoPayloads, #NoPayloads.x!enumelt
  return %u : $NoPayloads
}

// CHECK: define{{( protected)?}} swiftcc i8 @no_payload_inject_y() {{.*}} {
// CHECK: entry:
// CHECK:   ret i8 1
// CHECK: }
sil @no_payload_inject_y : $() -> NoPayloads {
entry:
  %u = enum $NoPayloads, #NoPayloads.y!enumelt
  return %u : $NoPayloads
}

// CHECK: define{{( protected)?}} swiftcc i8 @no_payload_inject_z() {{.*}} {
// CHECK: entry:
// CHECK:   ret i8 2
// CHECK: }
sil @no_payload_inject_z : $() -> NoPayloads {
entry:
  %u = enum $NoPayloads, #NoPayloads.z!enumelt
  return %u : $NoPayloads
}

// CHECK: define{{( protected)?}} swiftcc void @no_payload_inject_z_indirect(%T4enum10NoPayloadsO* nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK: entry:
// CHECK:   [[TAG_ADDR:%.*]] = getelementptr inbounds %T4enum10NoPayloadsO, %T4enum10NoPayloadsO* %0, i32 0, i32 0
// CHECK:   store i8 2, i8* [[TAG_ADDR]]
// CHECK:   ret void
// CHECK: }
sil @no_payload_inject_z_indirect : $(@inout NoPayloads) -> () {
entry(%0 : $*NoPayloads):
  inject_enum_addr %0 : $*NoPayloads, #NoPayloads.z!enumelt
  %v = tuple ()
  return %v : $()
}


enum NoPayloads2 {
  case a
  case e
  case i
  case o
  case u
  case y
}

// CHECK: define{{( protected)?}} swiftcc void @no_payload_switch_2(i8) {{.*}} {
sil @no_payload_switch_2 : $@convention(thin) (NoPayloads2) -> () {
// CHECK: entry:
entry(%u : $NoPayloads2):
// CHECK:   [[COND:%.*]] = icmp ne i8 %0, 4
// CHECK:   br i1 [[COND]], label %[[DEFAULT_DEST:[0-9]+]], label %[[U_DEST:[0-9]+]]
  switch_enum %u : $NoPayloads2, case #NoPayloads2.u!enumelt: u_dest, default default_dest

// CHECK: ; <label>:[[U_DEST]]
u_dest:
// CHECK:   call swiftcc void @a()
  %a = function_ref @a : $@convention(thin) () -> ()
  apply %a() : $@convention(thin) () -> ()
// CHECK:   br label %[[END:[0-9]+]]
  br end

// CHECK: ; <label>:[[DEFAULT_DEST]]
default_dest:
// CHECK:   call swiftcc void @b()
  %b = function_ref @b : $@convention(thin) () -> ()
  apply %b() : $@convention(thin) () -> ()
// CHECK:   br label %[[END]]
  br end

// CHECK: ; <label>:[[END]]
end:
// CHECK:   ret void
  %x = tuple ()
  return %x : $()
}


enum SinglePayloadNoXI {
  case x(Builtin.Word)
  case y
}

enum SinglePayloadNoXI2 {
  case x(Builtin.Word)
  case y
  case z
  case w
  case v
  case u
}

// CHECK-64: define{{( protected)?}} swiftcc void @single_payload_no_xi_switch([[WORD:i64]], i8) {{.*}} {
// CHECK-32: define{{( protected)?}} swiftcc void @single_payload_no_xi_switch([[WORD:i32]], i8) {{.*}} {
sil @single_payload_no_xi_switch : $@convention(thin) (SinglePayloadNoXI2) -> () {
// CHECK: entry:
entry(%u : $SinglePayloadNoXI2):
// CHECK;   %2 = trunc i8
// CHECK:   br i1 %2, label %[[TAGS:[0-9]+]], label %[[X_DEST:[0-9]+]]
// CHECK: ; <label>:[[TAGS]]
// CHECK:   switch [[WORD]] %0, label %[[DFLT:[0-9]+]] [
// CHECK:     [[WORD]] 0, label %[[Y_DEST:[0-9]+]]
// CHECK:     [[WORD]] 1, label %[[Z_DEST:[0-9]+]]
// CHECK:     [[WORD]] 2, label %[[W_DEST:[0-9]+]]
// CHECK:     [[WORD]] 3, label %[[V_DEST:[0-9]+]]
// CHECK:     [[WORD]] 4, label %[[U_DEST:[0-9]+]]
// CHECK:   ]
// CHECK: ; <label>:[[DFLT]]
// CHECK:   unreachable
  switch_enum %u : $SinglePayloadNoXI2, case #SinglePayloadNoXI2.x!enumelt.1: x_dest, case #SinglePayloadNoXI2.y!enumelt: y_dest, case #SinglePayloadNoXI2.z!enumelt: z_dest, case #SinglePayloadNoXI2.w!enumelt: w_dest, case #SinglePayloadNoXI2.v!enumelt: v_dest, case #SinglePayloadNoXI2.u!enumelt: u_dest


// CHECK: ; <label>:[[X_DEST]]
// CHECK:   call swiftcc void @a()
// CHECK:   br label %[[END:[0-9]+]]
x_dest:
  %a = function_ref @a : $@convention(thin) () -> ()
  apply %a() : $@convention(thin) () -> ()
  br end

// CHECK: ; <label>:[[Y_DEST]]
// CHECK:   call swiftcc void @b()
// CHECK:   br label %[[END]]
y_dest:
  %b = function_ref @b : $@convention(thin) () -> ()
  apply %b() : $@convention(thin) () -> ()
  br end

// CHECK: ; <label>:[[Z_DEST]]
// CHECK:   call swiftcc void @c()
// CHECK:   br label %[[END]]
z_dest:
  %c = function_ref @c : $@convention(thin) () -> ()
  apply %c() : $@convention(thin) () -> ()
  br end

// CHECK: ; <label>:[[W_DEST]]
// CHECK:   call swiftcc void @a()
// CHECK:   br label %[[END:[0-9]+]]
w_dest:
  %d = function_ref @a : $@convention(thin) () -> ()
  apply %d() : $@convention(thin) () -> ()
  br end

// CHECK: ; <label>:[[V_DEST]]
// CHECK:   call swiftcc void @b()
// CHECK:   br label %[[END]]
v_dest:
  %e = function_ref @b : $@convention(thin) () -> ()
  apply %e() : $@convention(thin) () -> ()
  br end

// CHECK: ; <label>:[[U_DEST]]
// CHECK:   call swiftcc void @c()
// CHECK:   br label %[[END]]
u_dest:
  %f = function_ref @c : $@convention(thin) () -> ()
  apply %f() : $@convention(thin) () -> ()
  br end

// CHECK: ; <label>:[[END]]
// CHECK:   ret void
end:
  %x = tuple ()
  return %x : $()
}

// CHECK: define{{( protected)?}} swiftcc void @single_payload_no_xi_switch_arg([[WORD]], i8) {{.*}} {
sil @single_payload_no_xi_switch_arg : $@convention(thin) (SinglePayloadNoXI2) -> () {
// CHECK: entry:
entry(%u : $SinglePayloadNoXI2):
// CHECK:  %2 = trunc i8
// CHECK:   br i1 %2, label %[[TAGS:[0-9]+]], label %[[X_PREDEST:[0-9]+]]
// CHECK: ; <label>:[[TAGS]]
// CHECK:   switch [[WORD]] %0, label %[[DFLT:[0-9]+]] [
// CHECK:     [[WORD]] 0, label %[[Y_DEST:[0-9]+]]
// CHECK:     [[WORD]] 1, label %[[Z_DEST:[0-9]+]]
// CHECK:     [[WORD]] 2, label %[[SPLITEDGE:[0-9]+]]
// CHECK:     [[WORD]] 3, label %[[SPLITEDGE]]
// CHECK:     [[WORD]] 4, label %[[SPLITEDGE]]
// CHECK:   ]
// CHECK: ; <label>:[[DFLT]]
// CHECK:   unreachable
  switch_enum %u : $SinglePayloadNoXI2, case #SinglePayloadNoXI2.x!enumelt.1: x_dest, case #SinglePayloadNoXI2.y!enumelt: y_dest, case #SinglePayloadNoXI2.z!enumelt: z_dest, default end

// CHECK: ; <label>:[[X_PREDEST]]
// CHECK:   br label %[[X_DEST:[0-9]+]]
// CHECK: ; <label>:[[SPLITEDGE]]
// CHECK:   br label %[[END:[0-9]+]]
// CHECK: ; <label>:[[X_DEST]]
// CHECK:   {{%.*}} = phi [[WORD]] [ %0, %[[X_PREDEST]] ]
x_dest(%u2 : $Builtin.Word):
// CHECK:   call swiftcc void @a()
// CHECK:   br label %[[END]]
  %a = function_ref @a : $@convention(thin) () -> ()
  apply %a() : $@convention(thin) () -> ()
  br end

// CHECK: ; <label>:[[Y_DEST]]
y_dest:
// CHECK:   call swiftcc void @b()
// CHECK:   br label %[[END]]
  %b = function_ref @b : $@convention(thin) () -> ()
  apply %b() : $@convention(thin) () -> ()
  br end

// CHECK: ; <label>:[[Z_DEST]]
z_dest:
// CHECK:   call swiftcc void @c()
// CHECK:   br label %[[END]]
  %c = function_ref @c : $@convention(thin) () -> ()
  apply %c() : $@convention(thin) () -> ()
  br end

// CHECK: ; <label>:[[END]]
// CHECK:   ret void
end:
  %x = tuple ()
  return %x : $()
}

// CHECK: define{{( protected)?}} swiftcc { [[WORD]], i8 } @single_payload_no_xi_inject_x([[WORD]]) {{.*}} {
// CHECK: entry:
// CHECK:   [[A:%.*]] = insertvalue { [[WORD]], i8 } undef, [[WORD]] %0, 0
// CHECK:   [[B:%.*]] = insertvalue { [[WORD]], i8 } [[A]], i8 0, 1
// CHECK:   ret { [[WORD]], i8 } [[B]]
// CHECK: }
sil @single_payload_no_xi_inject_x : $(Builtin.Word) -> SinglePayloadNoXI2 {
entry(%0 : $Builtin.Word):
  %u = enum $SinglePayloadNoXI2, #SinglePayloadNoXI2.x!enumelt.1, %0 : $Builtin.Word
  return %u : $SinglePayloadNoXI2
}

// CHECK: define{{( protected)?}} swiftcc void @single_payload_no_xi_inject_x_indirect([[WORD]], %T4enum18SinglePayloadNoXI2O* nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK: entry:
// CHECK:   [[DATA_ADDR:%.*]] = bitcast %T4enum18SinglePayloadNoXI2O* %1 to [[WORD]]*
// CHECK:   store [[WORD]] %0, [[WORD]]* [[DATA_ADDR]]
// CHECK:   [[T0:%.*]] = getelementptr inbounds %T4enum18SinglePayloadNoXI2O, %T4enum18SinglePayloadNoXI2O* %1, i32 0, i32 1
// CHECK:   [[TAG_ADDR:%.*]] = bitcast [1 x i8]* [[T0]] to i1*
// CHECK:   store i1 false, i1* [[TAG_ADDR]]
// CHECK:   ret void
// CHECK: }
sil @single_payload_no_xi_inject_x_indirect : $(Builtin.Word, @inout SinglePayloadNoXI2) -> () {
entry(%0 : $Builtin.Word, %1 : $*SinglePayloadNoXI2):
  %a = init_enum_data_addr %1 : $*SinglePayloadNoXI2, #SinglePayloadNoXI2.x!enumelt.1
  store %0 to %a : $*Builtin.Word
  inject_enum_addr %1 : $*SinglePayloadNoXI2, #SinglePayloadNoXI2.x!enumelt.1
  %v = tuple ()
  return %v : $()
}

// CHECK: define{{( protected)?}} swiftcc { [[WORD]], i8 } @single_payload_no_xi_inject_y() {{.*}} {
// CHECK: entry:
// CHECK:   ret { [[WORD]], i8 } { [[WORD]] 0, i8 1 }
// CHECK: }
sil @single_payload_no_xi_inject_y : $() -> SinglePayloadNoXI2 {
entry:
  %u = enum $SinglePayloadNoXI2, #SinglePayloadNoXI2.y!enumelt
  return %u : $SinglePayloadNoXI2
}

// CHECK: define{{( protected)?}} swiftcc void @single_payload_no_xi_inject_y_indirect(%T4enum18SinglePayloadNoXI2O* nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK: entry:
// CHECK:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum18SinglePayloadNoXI2O* %0 to [[WORD]]*
// CHECK:   store [[WORD]] 0, [[WORD]]* [[PAYLOAD_ADDR]]
// CHECK:   [[T0:%.*]] = getelementptr inbounds %T4enum18SinglePayloadNoXI2O, %T4enum18SinglePayloadNoXI2O* %0, i32 0, i32 1
// CHECK:   [[TAG_ADDR:%.*]] = bitcast [1 x i8]* [[T0]] to i1*
// CHECK:   store i1 true, i1* [[TAG_ADDR]]
// CHECK:   ret void
// CHECK: }
sil @single_payload_no_xi_inject_y_indirect : $(@inout SinglePayloadNoXI2) -> () {
entry(%0 : $*SinglePayloadNoXI2):
  inject_enum_addr %0 : $*SinglePayloadNoXI2, #SinglePayloadNoXI2.y!enumelt
  %v = tuple ()
  return %v : $()
}

// CHECK: define{{( protected)?}} swiftcc { [[WORD]], i8 } @single_payload_no_xi_inject_z() {{.*}} {
// CHECK: entry:
// CHECK:   ret { [[WORD]], i8 } { [[WORD]] 1, i8 1 }
// CHECK: }
sil @single_payload_no_xi_inject_z : $() -> SinglePayloadNoXI2 {
entry:
  %u = enum $SinglePayloadNoXI2, #SinglePayloadNoXI2.z!enumelt
  return %u : $SinglePayloadNoXI2
}


// -- Test packing and unpacking aggregates.

enum AggregateSinglePayload {
  case x(Builtin.Word, Builtin.Word)
  case y
  case z
}

sil @int21_sink : $@convention(thin) (Builtin.Int21) -> ()
sil @int64_sink : $@convention(thin) (Builtin.Word) -> ()

// CHECK-LABEL: define{{( protected)?}} swiftcc void @aggregate_single_payload_unpack
// CHECK:         ([[WORD]], [[WORD]], i8) {{.*}} {
sil @aggregate_single_payload_unpack : $@convention(thin) (AggregateSinglePayload) -> () {
entry(%u : $AggregateSinglePayload):
  switch_enum %u : $AggregateSinglePayload, case #AggregateSinglePayload.x!enumelt.1: x_dest, default end

  // CHECK: [[FIRST:%.*]] = phi [[WORD]] [ %0
  // CHECK: [[SECOND:%.*]] = phi [[WORD]] [ %1
  // CHECK: call swiftcc void @int64_sink([[WORD]] [[FIRST]])
  // CHECK: call swiftcc void @int64_sink([[WORD]] [[SECOND]])
x_dest(%v : $(Builtin.Word, Builtin.Word)):
  %f = function_ref @int64_sink : $@convention(thin) (Builtin.Word) -> ()
  %a = tuple_extract %v : $(Builtin.Word, Builtin.Word), 0
  %b = tuple_extract %v : $(Builtin.Word, Builtin.Word), 1
  %c = apply %f(%a) : $@convention(thin) (Builtin.Word) -> ()
  %d = apply %f(%b) : $@convention(thin) (Builtin.Word) -> ()
  br end

end:
  %x = tuple ()
  return %x : $()
}

// CHECK: define{{( protected)?}} swiftcc { [[WORD]], [[WORD]] } @aggregate_single_payload_unsafe_unpack([[WORD]], [[WORD]], i8) {{.*}} {
// CHECK:  [[A:%.*]] = insertvalue { [[WORD]], [[WORD]] } undef, [[WORD]] %0, 0
// CHECK:  [[B:%.*]] = insertvalue { [[WORD]], [[WORD]] } [[A]], [[WORD]] %1, 1
// CHECK:  ret { [[WORD]], [[WORD]] } [[B]]
sil @aggregate_single_payload_unsafe_unpack : $@convention(thin) (AggregateSinglePayload) -> (Builtin.Word, Builtin.Word) {
entry(%u : $AggregateSinglePayload):
  %x = unchecked_enum_data %u : $AggregateSinglePayload, #AggregateSinglePayload.x!enumelt.1
  return %x : $(Builtin.Word, Builtin.Word)
}

// CHECK: define{{( protected)?}} swiftcc { [[WORD]], [[WORD]], i8 } @aggregate_single_payload_inject([[WORD]], [[WORD]]) {{.*}} {
// CHECK: entry:
// CHECK:   [[RES_0:%.*]] = insertvalue { [[WORD]], [[WORD]], i8 } undef, [[WORD]] %0, 0
// CHECK:   [[RES_1:%.*]] = insertvalue { [[WORD]], [[WORD]], i8 } [[RES_0]], [[WORD]] %1, 1
// CHECK:   [[RES:%.*]] = insertvalue { [[WORD]], [[WORD]], i8 } [[RES_1]], i8 0, 2
// CHECK:   ret { [[WORD]], [[WORD]], i8 } [[RES]]
// CHECK: }
sil @aggregate_single_payload_inject : $(Builtin.Word, Builtin.Word) -> AggregateSinglePayload {
entry(%0 : $Builtin.Word, %1 : $Builtin.Word):
  %t = tuple (%0 : $Builtin.Word, %1 : $Builtin.Word)
  %u = enum $AggregateSinglePayload, #AggregateSinglePayload.x!enumelt.1, %t : $(Builtin.Word, Builtin.Word)
  return %u : $AggregateSinglePayload
}

struct CharLike { var value : Builtin.Int21 }
struct IntLike { var value : Builtin.Word }
struct RangeLike { var from, to : Builtin.Word }

enum AggregateSinglePayload2 {
  case x(CharLike, IntLike, RangeLike)
  case y
  case z
}

// CHECK-64: define{{( protected)?}} swiftcc void @aggregate_single_payload_unpack_2([[WORD]], [[WORD]], [[WORD]], [[WORD]]) {{.*}} {
// CHECK-32: define{{( protected)?}}  swiftcc void @aggregate_single_payload_unpack_2(%T4enum23AggregateSinglePayload2O* noalias nocapture dereferenceable(16)) {{.*}} {
sil @aggregate_single_payload_unpack_2 : $@convention(thin) (AggregateSinglePayload2) -> () {
entry(%u : $AggregateSinglePayload2):
// CHECK-32:  [[CAST:%.*]] = bitcast %T4enum23AggregateSinglePayload2O* %0 to { i32, i32, i32, i32 }*
// CHECK-32:  [[GEP:%.*]] = getelementptr inbounds {{.*}} [[CAST]], i32 0, i32 0
// CHECK-32:  [[LOAD1:%.*]] = load i32, i32* [[GEP]]
// CHECK-32:  [[LOAD2:%.*]] = load i32, i32* {{.*}}
// CHECK-32:  [[LOAD3:%.*]] = load i32, i32* {{.*}}
// CHECK-32:  [[LOAD4:%.*]] = load i32, i32* {{.*}}
  switch_enum %u : $AggregateSinglePayload2, case #AggregateSinglePayload2.x!enumelt.1: x_dest, default end

// CHECK-32:   [[TRUNC:%.*]] = trunc [[WORD]] [[LOAD1]] to i21
// CHECK-32:   phi i21 [ [[TRUNC]]
// CHECK-32:   phi [[WORD]] [ [[LOAD2]]
// CHECK-32:   phi [[WORD]] [ [[LOAD3]]
// CHECK-32:   phi [[WORD]] [ [[LOAD4]]

// CHECK-64:   [[TRUNC:%.*]] = trunc [[WORD]] %0 to i21
// CHECK-64:   phi i21 [ [[TRUNC]]
// CHECK-64:   phi [[WORD]] [ %1
// CHECK-64:   phi [[WORD]] [ %2
// CHECK-64:   phi [[WORD]] [ %3
x_dest(%v : $(CharLike, IntLike, RangeLike)):
  br end

end:
  %x = tuple ()
  return %x : $()
}

// CHECK-64: define{{( protected)?}} swiftcc { [[WORD]], [[WORD]], [[WORD]], [[WORD]] } @aggregate_single_payload_2_inject(i32, [[WORD]], [[WORD]], [[WORD]]) {{.*}} {
// CHECK-64: entry:
// CHECK-64:  %4 = trunc i32 %0 to i21
// CHECK-64:  %5 = zext i21 %4 to [[WORD]]
// CHECK-64:  %6 = insertvalue { [[WORD]], [[WORD]], [[WORD]], [[WORD]] } undef, [[WORD]] %5, 0
// CHECK-64:  %7 = insertvalue { [[WORD]], [[WORD]], [[WORD]], [[WORD]] } %6, [[WORD]] %1, 1
// CHECK-64:  %8 = insertvalue { [[WORD]], [[WORD]], [[WORD]], [[WORD]] } %7, [[WORD]] %2, 2
// CHECK-64:  %9 = insertvalue { [[WORD]], [[WORD]], [[WORD]], [[WORD]] } %8, [[WORD]] %3, 3
// CHECK-64:  ret { [[WORD]], [[WORD]], [[WORD]], [[WORD]] } %9

// CHECK-32: define{{( protected)?}} swiftcc void @aggregate_single_payload_2_inject(%T4enum23AggregateSinglePayload2O* noalias nocapture sret, i32, i32, i32, i32) {{.*}} {
// CHECK-32:  [[TRUNC:%.*]] = trunc i32 %1 to i21
// CHECK-32:  [[ZEXT:%.*]] = zext i21 [[TRUNC]] to i32
// CHECK-32:  [[CAST:%.*]] = bitcast %T4enum23AggregateSinglePayload2O* %0 to { i32, i32, i32, i32 }*
// CHECK-32:  [[GEP:%.*]] = getelementptr inbounds {{.*}} [[CAST]], i32 0, i32 0
// CHECK-32:  store i32 [[ZEXT]], i32* [[GEP]]
// CHECK-32:  store i32 %2, i32*
// CHECK-32:  store i32 %3, i32*
// CHECK-32:  store i32 %4, i32*
// CHECK-32: ret void
sil @aggregate_single_payload_2_inject : $(CharLike, IntLike, RangeLike) -> AggregateSinglePayload2 {
entry(%0 : $CharLike, %1 : $IntLike, %2 : $RangeLike):
  %t = tuple (%0 : $CharLike, %1 : $IntLike, %2 : $RangeLike)
  %u = enum $AggregateSinglePayload2, #AggregateSinglePayload2.x!enumelt.1, %t : $(CharLike, IntLike, RangeLike)
  return %u : $AggregateSinglePayload2
}

enum AggregateSinglePayload3 {
  case x(Builtin.Int21, Builtin.Word)
  case y
  case z
}

// CHECK: define{{( protected)?}} swiftcc void @aggregate_single_payload_unpack_3([[WORD]], [[WORD]]) {{.*}} {
sil @aggregate_single_payload_unpack_3 : $@convention(thin) (AggregateSinglePayload3) -> () {
entry(%u : $AggregateSinglePayload3):
  switch_enum %u : $AggregateSinglePayload3, case #AggregateSinglePayload3.x!enumelt.1: x_dest, default end

  // CHECK: [[TRUNC:%.*]] = trunc [[WORD]] %0 to i21
  // CHECK: [[FIRST:%.*]] = phi i21 [ [[TRUNC]]
  // CHECK: [[SECOND:%.*]] = phi [[WORD]] [ %1
  // CHECK: [[ZEXT:%.*]] = zext i21 [[FIRST]] to i32
  // CHECK: call swiftcc void @int21_sink(i32 [[ZEXT]])
  // CHECK: call swiftcc void @int64_sink([[WORD]] [[SECOND]])
x_dest(%v : $(Builtin.Int21, Builtin.Word)):
  %f = function_ref @int21_sink : $@convention(thin) (Builtin.Int21) -> ()
  %g = function_ref @int64_sink : $@convention(thin) (Builtin.Word) -> ()
  %a = tuple_extract %v : $(Builtin.Int21, Builtin.Word), 0
  %b = tuple_extract %v : $(Builtin.Int21, Builtin.Word), 1
  %c = apply %f(%a) : $@convention(thin) (Builtin.Int21) -> ()
  %d = apply %g(%b) : $@convention(thin) (Builtin.Word) -> ()
  br end

end:
  %x = tuple ()
  return %x : $()
}

// CHECK: define{{( protected)?}} swiftcc { [[WORD]], [[WORD]] } @aggregate_single_payload_inject_x3(i32, [[WORD]]) {{.*}} {
// CHECK: entry:
// CHECK:   [[TRUNC:%.*]] = trunc i32 %0 to i21
// CHECK:   [[ZEXT:%.*]] = zext i21 [[TRUNC]] to [[WORD]]
// CHECK:   [[A:%.*]] = insertvalue { [[WORD]], [[WORD]] } undef, [[WORD]] [[ZEXT]], 0
// CHECK:   [[B:%.*]] = insertvalue { [[WORD]], [[WORD]] } [[A]], [[WORD]] %1, 1
// CHECK:   ret { [[WORD]], [[WORD]] } [[B]]
// CHECK: }
sil @aggregate_single_payload_inject_x3 : $(Builtin.Int21, Builtin.Word) -> AggregateSinglePayload3 {
entry(%0 : $Builtin.Int21, %1 : $Builtin.Word):
  %t = tuple (%0 : $Builtin.Int21, %1 : $Builtin.Word)
  %u = enum $AggregateSinglePayload3, #AggregateSinglePayload3.x!enumelt.1, %t : $(Builtin.Int21, Builtin.Word)
  return %u : $AggregateSinglePayload3
}

// CHECK: define{{( protected)?}} swiftcc { [[WORD]], [[WORD]] } @aggregate_single_payload_inject_y3() {{.*}} {
// CHECK: entry:
// CHECK:   ret { [[WORD]], [[WORD]] } { [[WORD]] 2097152, [[WORD]] 0 }
// CHECK: }
//   2097152 == 0x200000
sil @aggregate_single_payload_inject_y3 : $() -> AggregateSinglePayload3 {
entry:
  %u = enum $AggregateSinglePayload3, #AggregateSinglePayload3.y!enumelt
  return %u : $AggregateSinglePayload3
}

enum SinglePayloadSpareBit {
  case x(Builtin.Int63)
  case y
  case z
}

// CHECK-64: define{{( protected)?}} swiftcc void @single_payload_spare_bit_switch(i64) {{.*}} {
// CHECK-32: define{{( protected)?}} swiftcc void @single_payload_spare_bit_switch(i32, i32) {{.*}} {
sil @single_payload_spare_bit_switch : $@convention(thin) (SinglePayloadSpareBit) -> () {
// CHECK: entry:
entry(%u : $SinglePayloadSpareBit):
// CHECK-64:  switch i64 %0, label %[[X_DEST:[0-9]+]] [
// --              0x8000_0000_0000_0000
// CHECK-64:    i64 -9223372036854775808, label %[[Y_DEST:[0-9]+]]
// --              0x8000_0000_0000_0001
// CHECK-64:    i64 -9223372036854775807, label %[[Z_DEST:[0-9]+]]
// CHECK-64:  ]

// CHECK-32:  switch i32 %0, label %[[X_DEST:[0-9]+]] [
// CHECK-32:    i32 0, label %[[Y_HIGH:[0-9]+]]
// CHECK-32:    i32 1, label %[[Z_HIGH:[0-9]+]]
// CHECK-32:  ]
// CHECK-32: ; <label>:[[Y_HIGH]]
// CHECK-32:  [[IS_Y:%.*]] = icmp eq i32 %1, -2147483648
// CHECK-32:  br i1 [[IS_Y]], label %[[Y_DEST:[0-9]+]], label %[[X_DEST]]
// CHECK-32: ; <label>:[[Z_HIGH]]
// CHECK-32:  [[IS_Z:%.*]] = icmp eq i32 %1, -2147483648
// CHECK-32:  br i1 [[IS_Z]], label %[[Z_DEST:[0-9]+]], label %[[X_DEST]]
  switch_enum %u : $SinglePayloadSpareBit, case #SinglePayloadSpareBit.x!enumelt.1: x_dest, case #SinglePayloadSpareBit.y!enumelt: y_dest, case #SinglePayloadSpareBit.z!enumelt: z_dest

// CHECK: ; <label>:[[X_DEST]]
x_dest:
// CHECK:   call swiftcc void @a()
  %a = function_ref @a : $@convention(thin) () -> ()
  apply %a() : $@convention(thin) () -> ()
// CHECK:   br label %[[END:[0-9]+]]
  br end

// CHECK: ; <label>:[[Y_DEST]]
y_dest:
// CHECK:   call swiftcc void @b()
  %b = function_ref @b : $@convention(thin) () -> ()
  apply %b() : $@convention(thin) () -> ()
// CHECK:   br label %[[END]]
  br end

// CHECK: ; <label>:[[Z_DEST]]
z_dest:
// CHECK:   call swiftcc void @c()
  %c = function_ref @c : $@convention(thin) () -> ()
  apply %c() : $@convention(thin) () -> ()
// CHECK:   br label %[[END]]
  br end

// CHECK: ; <label>:[[END]]
end:
// CHECK:   ret void
  %x = tuple ()
  return %x : $()
}

// CHECK-64: define{{( protected)?}} swiftcc void @single_payload_spare_bit_switch_arg(i64) {{.*}} {
sil @single_payload_spare_bit_switch_arg : $@convention(thin) (SinglePayloadSpareBit) -> () {
// CHECK: entry:
entry(%u : $SinglePayloadSpareBit):
// CHECK-64:  switch i64 %0, label %[[X_PREDEST:[0-9]+]] [
// --           0x8000_0000_0000_0000
// CHECK-64:    i64 -9223372036854775808, label %[[Y_DEST:[0-9]+]]
// --           0x8000_0000_0000_0001
// CHECK-64:    i64 -9223372036854775807, label %[[Z_DEST:[0-9]+]]
// CHECK-64:  ]
  switch_enum %u : $SinglePayloadSpareBit, case #SinglePayloadSpareBit.x!enumelt.1: x_dest, case #SinglePayloadSpareBit.y!enumelt: y_dest, case #SinglePayloadSpareBit.z!enumelt: z_dest

// CHECK-64: ; <label>:[[X_PREDEST]]
// CHECK-64:   [[TRUNC_PAYLOAD:%.*]] = trunc i64 %0 to i63
// CHECK-64:   br label %[[X_DEST:[0-9]+]]
// CHECK-64: ; <label>:[[X_DEST]]
// CHECK-64:   {{%.*}} = phi i63 [ [[TRUNC_PAYLOAD]], %[[X_PREDEST]] ]
x_dest(%u2 : $Builtin.Int63):
// CHECK-64:   call swiftcc void @a()
  %a = function_ref @a : $@convention(thin) () -> ()
  apply %a() : $@convention(thin) () -> ()
// CHECK-64:   br label %[[END:[0-9]+]]
  br end

// CHECK-64: ; <label>:[[Y_DEST]]
y_dest:
// CHECK-64:   call swiftcc void @b()
  %b = function_ref @b : $@convention(thin) () -> ()
  apply %b() : $@convention(thin) () -> ()
// CHECK-64:   br label %[[END]]
  br end

// CHECK-64: ; <label>:[[Z_DEST]]
z_dest:
// CHECK-64:   call swiftcc void @c()
  %c = function_ref @c : $@convention(thin) () -> ()
  apply %c() : $@convention(thin) () -> ()
// CHECK-64:   br label %[[END]]
  br end

// CHECK-64: ; <label>:[[END]]
end:
// CHECK-64:   ret void
  %x = tuple ()
  return %x : $()
}

sil @single_payload_spare_bit_switch_indirect : $@convention(thin) (@inout SinglePayloadSpareBit) -> () {
entry(%u : $*SinglePayloadSpareBit):
// CHECK-64:  [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum21SinglePayloadSpareBitO* %0 to i64*
// CHECK-64:  [[PAYLOAD:%.*]] = load i64, i64* [[PAYLOAD_ADDR]]
// CHECK-64:  switch i64 [[PAYLOAD]]
  switch_enum_addr %u : $*SinglePayloadSpareBit, case #SinglePayloadSpareBit.x!enumelt.1: x_dest, case #SinglePayloadSpareBit.y!enumelt: y_dest, case #SinglePayloadSpareBit.z!enumelt: z_dest

// CHECK-64: ; <label>:
// CHECK-64:   [[DATA_ADDR:%.*]] = bitcast %T4enum21SinglePayloadSpareBitO* %0 to i63*
x_dest:
  %u2 = unchecked_take_enum_data_addr %u : $*SinglePayloadSpareBit, #SinglePayloadSpareBit.x!enumelt.1
  %a = function_ref @a : $@convention(thin) () -> ()
  apply %a() : $@convention(thin) () -> ()
  br end

y_dest:
  br end

z_dest:
  br end

end:
  %x = tuple ()
  return %x : $()
}

// CHECK-64: define{{( protected)?}} swiftcc i64 @single_payload_spare_bit_inject_x(i64) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[T:%.*]] = trunc i64 %0 to i63
// CHECK-64:   [[A:%.*]] = zext i63 [[T]] to i64
// CHECK-64:   ret i64 [[A]]
// CHECK-64: }
sil @single_payload_spare_bit_inject_x : $(Builtin.Int63) -> SinglePayloadSpareBit {
entry(%0 : $Builtin.Int63):
  %u = enum $SinglePayloadSpareBit, #SinglePayloadSpareBit.x!enumelt.1, %0 : $Builtin.Int63
  return %u : $SinglePayloadSpareBit
}

// CHECK-64: define{{( protected)?}} swiftcc void @single_payload_spare_bit_inject_x_indirect(i64, %T4enum21SinglePayloadSpareBitO* nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[T:%.*]] = trunc i64 %0 to i63
// CHECK-64:   [[DATA_ADDR:%.*]] = bitcast %T4enum21SinglePayloadSpareBitO* %1 to i63*
// CHECK-64:   store i63 [[T]], i63* [[DATA_ADDR]]
// CHECK-64:   ret void
// CHECK-64: }
sil @single_payload_spare_bit_inject_x_indirect : $(Builtin.Int63, @inout SinglePayloadSpareBit) -> () {
entry(%0 : $Builtin.Int63, %1 : $*SinglePayloadSpareBit):
  %a = init_enum_data_addr %1 : $*SinglePayloadSpareBit, #SinglePayloadSpareBit.x!enumelt.1
  store %0 to %a : $*Builtin.Int63
  inject_enum_addr %1 : $*SinglePayloadSpareBit, #SinglePayloadSpareBit.x!enumelt.1
  %v = tuple ()
  return %v : $()
}

// CHECK-64: define{{( protected)?}} swiftcc i64 @single_payload_spare_bit_inject_y() {{.*}} {
// CHECK-64: entry:
// --              0x8000_0000_0000_0000
// CHECK-64:   ret i64 -9223372036854775808
// CHECK-64: }
sil @single_payload_spare_bit_inject_y : $() -> SinglePayloadSpareBit {
entry:
  %u = enum $SinglePayloadSpareBit, #SinglePayloadSpareBit.y!enumelt
  return %u : $SinglePayloadSpareBit
}

// CHECK-64: define{{( protected)?}} swiftcc void @single_payload_spare_bit_inject_y_indirect(%T4enum21SinglePayloadSpareBitO* nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum21SinglePayloadSpareBitO* %0 to i64*
// --                0x8000_0000_0000_0000
// CHECK-64:   store i64 -9223372036854775808, i64* [[PAYLOAD_ADDR]]
// CHECK-64:   ret void
// CHECK-64: }
sil @single_payload_spare_bit_inject_y_indirect : $(@inout SinglePayloadSpareBit) -> () {
entry(%0 : $*SinglePayloadSpareBit):
  inject_enum_addr %0 : $*SinglePayloadSpareBit, #SinglePayloadSpareBit.y!enumelt
  %v = tuple ()
  return %v : $()
}

// CHECK-64: define{{( protected)?}} swiftcc i64 @single_payload_spare_bit_inject_z() {{.*}} {
// CHECK-64: entry:
//                 0x8000_0000_0000_0001
// CHECK-64:   ret i64 -9223372036854775807
// CHECK-64: }
sil @single_payload_spare_bit_inject_z : $() -> SinglePayloadSpareBit {
entry:
  %u = enum $SinglePayloadSpareBit, #SinglePayloadSpareBit.z!enumelt
  return %u : $SinglePayloadSpareBit
}

enum SinglePayloadNested {
  case a(NoPayloads)
  case b
  case c
  case d
}

enum SinglePayloadNestedNested {
  case e(SinglePayloadNested)
  case f
  case g
  case h
}

// CHECK: define{{( protected)?}} swiftcc void @single_payload_nested_switch(i8) {{.*}} {
sil @single_payload_nested_switch : $(SinglePayloadNestedNested) -> () {
entry(%u : $SinglePayloadNestedNested):
// CHECK:   switch i8 {{%.*}}, label {{%.*}} [
// CHECK:     i8 6, label {{%.*}}
// CHECK:     i8 7, label {{%.*}}
// CHECK:     i8 8, label {{%.*}}
// CHECK:   ]
  switch_enum %u : $SinglePayloadNestedNested, case #SinglePayloadNestedNested.e!enumelt.1: e_dest, case #SinglePayloadNestedNested.f!enumelt: f_dest, case #SinglePayloadNestedNested.g!enumelt: g_dest, case #SinglePayloadNestedNested.h!enumelt: h_dest

e_dest(%v : $SinglePayloadNested):
// CHECK:   switch i8 {{%.*}}, label {{%.*}} [
// CHECK:     i8 3, label {{%.*}}
// CHECK:     i8 4, label {{%.*}}
// CHECK:     i8 5, label {{%.*}}
// CHECK:   ]
  switch_enum %v : $SinglePayloadNested, case #SinglePayloadNested.a!enumelt.1: a_dest, case #SinglePayloadNested.b!enumelt: b_dest, case #SinglePayloadNested.c!enumelt: c_dest, case #SinglePayloadNested.d!enumelt: d_dest
f_dest:
  br end
g_dest:
  br end
h_dest:
  br end

a_dest(%w : $NoPayloads):
// CHECK:   switch i8 {{%.*}}, label {{%.*}} [
// CHECK:     i8 0, label {{%.*}}
// CHECK:     i8 1, label {{%.*}}
// CHECK:     i8 2, label {{%.*}}
// CHECK:   ]
  switch_enum %w : $NoPayloads, case #NoPayloads.x!enumelt: x_dest, case #NoPayloads.y!enumelt: y_dest, case #NoPayloads.z!enumelt: z_dest
b_dest:
  br end
c_dest:
  br end
d_dest:
  br end

x_dest:
  br end
y_dest:
  br end
z_dest:
  br end

end:
  %x = tuple()
  return %x : $()
}

class C {}
sil_vtable C {}

sil @_T04enum1CCfD : $@convention(method) (C) -> ()

@objc class OC {}
sil_vtable OC {}
sil hidden @_T04enum2OCCACycfcTo : $@convention(thin) (OC) -> OC {
entry(%x : $OC):
  return %x : $OC
}

enum SinglePayloadClass {
  case x(C)
  case y
  case z
  case w
}

// CHECK-64: define{{( protected)?}} swiftcc void @single_payload_class_switch(i64) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   switch i64 %0, label {{%.*}} [
// CHECK-64:     i64 0, label {{%.*}}
// CHECK-64:     i64 2, label {{%.*}}
// CHECK-64:     i64 4, label {{%.*}}
// CHECK-64:   ]
// CHECK-64: ; <label>
// CHECK-64:   inttoptr [[WORD]] %0 to %T4enum1CC*

// CHECK-32: define{{( protected)?}} swiftcc void @single_payload_class_switch(i32) {{.*}} {
// CHECK-32: entry:
// CHECK-32:   switch i32 %0, label {{%.*}} [
// CHECK-32:     i32 0, label {{%.*}}
// CHECK-32:     i32 1, label {{%.*}}
// CHECK-32:     i32 2, label {{%.*}}
// CHECK-32:   ]
// CHECK-32: ; <label>
// CHECK-32:   inttoptr [[WORD]] %0 to %T4enum1CC*

sil @single_payload_class_switch : $(SinglePayloadClass) -> () {
entry(%c : $SinglePayloadClass):
  switch_enum %c : $SinglePayloadClass, case #SinglePayloadClass.x!enumelt.1: x_dest, case #SinglePayloadClass.y!enumelt: y_dest, case #SinglePayloadClass.z!enumelt: z_dest, case #SinglePayloadClass.w!enumelt: w_dest

x_dest(%d : $C):
  br end
y_dest:
  br end
z_dest:
  br end
w_dest:
  br end

end:
  return undef : $()
}

protocol PC : class {}
@objc protocol PO {}

enum SinglePayloadClassProtocol {
  case x(PC)
  case y, z, w
}

enum SinglePayloadObjCProtocol {
  case x(PO)
  case y, z, w
}

// CHECK-64: define{{( protected)?}} swiftcc void @single_payload_class_protocol_switch(i64, i64) {{.*}} {
// CHECK-64:   switch i64 %0, label {{%.*}} [
// CHECK-64:     i64 0, label {{%.*}}
// CHECK-64:     i64 2, label {{%.*}}
// CHECK-64:     i64 4, label {{%.*}}
// CHECK-64:   ]

// CHECK-objc-64:     inttoptr i64 %0 to %objc_object*
// CHECK-native-64:   inttoptr i64 %0 to %swift.refcounted*
// CHECK-64:   inttoptr i64 %1 to i8**

// CHECK-32: define{{( protected)?}} swiftcc void @single_payload_class_protocol_switch(i32, i32) {{.*}} {
// CHECK-32:   switch i32 %0, label {{%.*}} [
// CHECK-32:     i32 0, label {{%.*}}
// CHECK-32:     i32 1, label {{%.*}}
// CHECK-32:     i32 2, label {{%.*}}
// CHECK-32:   ]

// CHECK-objc-32:     inttoptr i32 %0 to %objc_object*
// CHECK-native-32:   inttoptr i32 %0 to %swift.refcounted*
// CHECK-32:   inttoptr i32 %1 to i8**

sil @single_payload_class_protocol_switch : $(SinglePayloadClassProtocol) -> () {
entry(%c : $SinglePayloadClassProtocol):
  switch_enum %c : $SinglePayloadClassProtocol, case #SinglePayloadClassProtocol.x!enumelt.1: x_dest, case #SinglePayloadClassProtocol.y!enumelt: y_dest, case #SinglePayloadClassProtocol.z!enumelt: z_dest, case #SinglePayloadClassProtocol.w!enumelt: w_dest

x_dest(%d : $PC):
  br end
y_dest:
  br end
z_dest:
  br end
w_dest:
  br end

end:
  return undef : $()
}

// CHECK-64: define{{( protected)?}} swiftcc void @single_payload_objc_protocol_switch(i64) {{.*}} {
// CHECK-64:   switch i64 %0, label {{%.*}}
// CHECK-64:     i64 0, label {{%.*}}
// CHECK-64:     i64 2, label {{%.*}}
// CHECK-64:     i64 4, label {{%.*}}
// CHECK-64:   ]
// CHECK-objc-64:     inttoptr i64 %0 to %objc_object*
// CHECK-native-64:   inttoptr i64 %0 to %swift.refcounted*

// CHECK-32: define{{( protected)?}} swiftcc void @single_payload_objc_protocol_switch(i32) {{.*}} {
// CHECK-32:   switch i32 %0, label {{%.*}}
// CHECK-32:     i32 0, label {{%.*}}
// CHECK-32:     i32 1, label {{%.*}}
// CHECK-32:     i32 2, label {{%.*}}
// CHECK-32:   ]
// CHECK-objc-32:     inttoptr i32 %0 to %objc_object*
// CHECK-native-32:   inttoptr i32 %0 to %swift.refcounted*

sil @single_payload_objc_protocol_switch : $(SinglePayloadObjCProtocol) -> () {
entry(%c : $SinglePayloadObjCProtocol):
  switch_enum %c : $SinglePayloadObjCProtocol, case #SinglePayloadObjCProtocol.x!enumelt.1: x_dest, case #SinglePayloadObjCProtocol.y!enumelt: y_dest, case #SinglePayloadObjCProtocol.z!enumelt: z_dest, case #SinglePayloadObjCProtocol.w!enumelt: w_dest

x_dest(%d : $PO):
  br end
y_dest:
  br end
z_dest:
  br end
w_dest:
  br end

end:
  return undef : $()
}


enum DynamicSinglePayload<T> {
  case x(T)
  case y
  case z
  case w
}

// CHECK: define{{( protected)?}} swiftcc void @dynamic_single_payload_switch(%T4enum20DynamicSinglePayloadO* noalias nocapture, %swift.type* %T) {{.*}} {
// CHECK:   [[OPAQUE_ENUM:%.*]] = bitcast %T4enum20DynamicSinglePayloadO* %0 to %swift.opaque*
// CHECK:   [[CASE_INDEX:%.*]] = call i32 @swift_rt_swift_getEnumCaseSinglePayload(%swift.opaque* [[OPAQUE_ENUM]], %swift.type* %T, i32 3)
// CHECK:   switch i32 [[CASE_INDEX]], label {{%.*}} [
// CHECK:     i32 -1, label {{%.*}}
// CHECK:     i32 2, label {{%.*}}
// CHECK:   ]
sil @dynamic_single_payload_switch : $<T> (@in DynamicSinglePayload<T>) -> () {
entry(%u : $*DynamicSinglePayload<T>):
  switch_enum_addr %u : $*DynamicSinglePayload<T>, case #DynamicSinglePayload.x!enumelt.1: x_dest, case #DynamicSinglePayload.w!enumelt: w_dest, default default_dest

x_dest:
  br end

w_dest:
  br end

default_dest:
  br end

end:
  %v = tuple ()
  return %v : $()
}

// CHECK: define{{( protected)?}} swiftcc void @dynamic_single_payload_inject_x(%T4enum20DynamicSinglePayloadO* noalias nocapture sret, %swift.opaque* noalias nocapture, %swift.type* %T) {{.*}} {
// CHECK:   [[ADDR:%.*]] = bitcast %T4enum20DynamicSinglePayloadO* %0 to %swift.opaque*
// CHECK:   call void @swift_rt_swift_storeEnumTagSinglePayload(%swift.opaque* [[ADDR]], %swift.type* %T, i32 -1, i32 3)
sil @dynamic_single_payload_inject_x : $<T> (@in T) -> @out DynamicSinglePayload<T> {
entry(%r : $*DynamicSinglePayload<T>, %t : $*T):
  inject_enum_addr %r : $*DynamicSinglePayload<T>, #DynamicSinglePayload.x!enumelt.1
  %v = tuple ()
  return %v : $()
}

// CHECK: define{{( protected)?}} swiftcc void @dynamic_single_payload_inject_y(%T4enum20DynamicSinglePayloadO* noalias nocapture sret, %swift.type* %T) {{.*}} {
// CHECK:   [[ADDR:%.*]] = bitcast %T4enum20DynamicSinglePayloadO* %0 to %swift.opaque*
// CHECK:   call void @swift_rt_swift_storeEnumTagSinglePayload(%swift.opaque* [[ADDR]], %swift.type* %T, i32 0, i32 3)
sil @dynamic_single_payload_inject_y : $<T> () -> @out DynamicSinglePayload<T> {
entry(%r : $*DynamicSinglePayload<T>):
  inject_enum_addr %r : $*DynamicSinglePayload<T>, #DynamicSinglePayload.y!enumelt
  %v = tuple ()
  return %v : $()
}

// -- Ensure instantiations of single-payload types with empty payloads work.
//    Bug discovered by Greg Parker.

// CHECK: define{{( protected)?}} swiftcc void @dynamic_single_payload_empty_payload_switch(i8) {{.*}} {
// CHECK:   switch i8 {{%.*}}, label {{.*}} [
// CHECK:     i8 0, label {{.*}}
// CHECK:     i8 1, label {{.*}}
// CHECK:     i8 2, label {{.*}}
// CHECK:     i8 3, label {{.*}}
// CHECK:   ]
sil @dynamic_single_payload_empty_payload_switch : $DynamicSinglePayload<()> -> () {
entry(%x : $DynamicSinglePayload<()>):
  switch_enum %x : $DynamicSinglePayload<()>, case #DynamicSinglePayload.x!enumelt.1: x_case, case #DynamicSinglePayload.y!enumelt: y_case, case #DynamicSinglePayload.z!enumelt: z_case, default default_case

x_case(%a : $()):
  br end(%a : $())

y_case:
  %b = tuple ()
  br end(%b : $())

z_case:
  %c = tuple ()
  br end(%c : $())

default_case:
  %d = tuple ()
  br end(%d : $())

end(%z : $()):
  return %z : $()
}

// CHECK: define{{( protected)?}} swiftcc i8 @dynamic_single_payload_empty_payload_load([[DYNAMIC_SINGLE_EMPTY_PAYLOAD]]* nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK: entry:
// CHECK:   %1 = bitcast [[DYNAMIC_SINGLE_EMPTY_PAYLOAD]]* %0 to i8*
// CHECK:   %2 = load i8, i8* %1
// CHECK:   ret i8 %2
// CHECK: }
sil @dynamic_single_payload_empty_payload_load : $(@inout DynamicSinglePayload<()>) -> DynamicSinglePayload<()> {
entry(%p : $*DynamicSinglePayload<()>):
  %x = load %p : $*DynamicSinglePayload<()>
  return %x : $DynamicSinglePayload<()>
}

// CHECK: define{{( protected)?}} swiftcc void @dynamic_single_payload_empty_payload_store([[DYNAMIC_SINGLE_EMPTY_PAYLOAD]]* nocapture dereferenceable({{.*}}), i8) {{.*}} {
// CHECK: entry:
// CHECK:   %2 = bitcast [[DYNAMIC_SINGLE_EMPTY_PAYLOAD]]* %0 to i8*
// CHECK:   store i8 %1, i8* %2
// CHECK:   ret void
// CHECK: }
sil @dynamic_single_payload_empty_payload_store : $(@inout DynamicSinglePayload<()>, DynamicSinglePayload<()>) -> () {
entry(%p : $*DynamicSinglePayload<()>, %x : $DynamicSinglePayload<()>):
  store %x to %p : $*DynamicSinglePayload<()>
  %v = tuple ()
  return %v : $()
}

// CHECK: define{{( protected)?}} swiftcc i8 @dynamic_single_payload_empty_payload_inject_payload() {{.*}} {
// CHECK: entry:
// CHECK:   ret i8 0
// CHECK: }
sil @dynamic_single_payload_empty_payload_inject_payload : $() -> DynamicSinglePayload<()> {
  %v = tuple ()
  %u = enum $DynamicSinglePayload<()>, #DynamicSinglePayload.x!enumelt, %v : $()
  return %u : $DynamicSinglePayload<()>
}

// CHECK: define{{( protected)?}} swiftcc i8 @dynamic_single_payload_empty_payload_inject_no_payload() {{.*}} {
// CHECK: entry:
// CHECK:   ret i8 1
// CHECK: }
sil @dynamic_single_payload_empty_payload_inject_no_payload : $() -> DynamicSinglePayload<()> {
  %u = enum $DynamicSinglePayload<()>, #DynamicSinglePayload.y!enumelt
  return %u : $DynamicSinglePayload<()>
}

// <rdar://problem/15383966>
// CHECK: define{{( protected)?}} swiftcc void @dynamic_single_payload_generic_destroy
// CHECK:   br i1
// CHECK: <label>
// CHECK:   call void %destroy
// CHECK: <label>
sil @dynamic_single_payload_generic_destroy : $@convention(thin) <T> (@in DynamicSinglePayload<T>) -> () {
entry(%x : $*DynamicSinglePayload<T>):
  destroy_addr %x : $*DynamicSinglePayload<T>
  %z = tuple ()
  return %z : $()
}

enum MultiPayloadNoSpareBits {
  case x(Builtin.Int64)
  case y(Builtin.Int32)
  case z(Builtin.Int63)
  case a
  case b
  case c
}

// CHECK-64: define{{( protected)?}} swiftcc void @multi_payload_no_spare_bits_switch(i64, i8) {{.*}} {
sil @multi_payload_no_spare_bits_switch : $(MultiPayloadNoSpareBits) -> () {
entry(%u : $MultiPayloadNoSpareBits):
// CHECK-64:   switch i8 %1, label %[[UNREACHABLE:[0-9]+]] [
// CHECK-64:     i8 0, label %[[X_PREDEST:[0-9]+]]
// CHECK-64:     i8 1, label %[[Y_PREDEST:[0-9]+]]
// CHECK-64:     i8 2, label %[[Z_PREDEST:[0-9]+]]
// CHECK-64:     i8 3, label %[[EMPTY:[0-9]+]]
// CHECK-64:   ]
// CHECK-64: ; <label>:[[EMPTY]]
// CHECK-64:   switch i64 %0, label %[[UNREACHABLE]] [
// CHECK-64:     i64 0, label %[[A_DEST:[0-9]+]]
// CHECK-64:     i64 1, label %[[B_DEST:[0-9]+]]
// CHECK-64:     i64 2, label %[[C_DEST:[0-9]+]]
// CHECK-64:   ]
// CHECK-64: ; <label>:[[UNREACHABLE]]
// CHECK-64:   unreachable
  switch_enum %u : $MultiPayloadNoSpareBits, case #MultiPayloadNoSpareBits.x!enumelt.1: x_dest, case #MultiPayloadNoSpareBits.y!enumelt.1: y_dest, case #MultiPayloadNoSpareBits.z!enumelt.1: z_dest, case #MultiPayloadNoSpareBits.a!enumelt: a_dest, case #MultiPayloadNoSpareBits.b!enumelt: b_dest, case #MultiPayloadNoSpareBits.c!enumelt: c_dest

// CHECK-64: ; <label>:[[X_PREDEST]]
// CHECK-64:   br label %[[X_DEST:[0-9]+]]
// CHECK-64: ; <label>:[[Y_PREDEST]]
// CHECK-64:   [[Y_VALUE:%.*]] = trunc i64 %0 to i32
// CHECK-64:   br label %[[Y_DEST:[0-9]+]]
// CHECK-64: ; <label>:[[Z_PREDEST]]
// CHECK-64:   [[Z_VALUE:%.*]] = trunc i64 %0 to i63
// CHECK-64:   br label %[[Z_DEST:[0-9]+]]

// CHECK-64: ; <label>:[[X_DEST]]
// CHECK-64:   phi i64 [ %0, %[[X_PREDEST]] ]
x_dest(%x : $Builtin.Int64):
  %a = function_ref @a : $@convention(thin) () -> ()
  apply %a() : $@convention(thin) () -> ()
  br end

// CHECK-64: ; <label>:[[Y_DEST]]
// CHECK-64:   phi i32 [ [[Y_VALUE]], %[[Y_PREDEST]] ]
y_dest(%y : $Builtin.Int32):
  %b = function_ref @b : $@convention(thin) () -> ()
  apply %b() : $@convention(thin) () -> ()
  br end

// CHECK-64: ; <label>:[[Z_DEST]]
// CHECK-64:   phi i63 [ [[Z_VALUE]], %[[Z_PREDEST]] ]
z_dest(%z : $Builtin.Int63):
  %c = function_ref @c : $@convention(thin) () -> ()
  apply %c() : $@convention(thin) () -> ()
  br end

// CHECK-64: ; <label>:[[A_DEST]]
a_dest:
  %d = function_ref @d : $@convention(thin) () -> ()
  apply %d() : $@convention(thin) () -> ()
  br end

// CHECK-64: ; <label>:[[B_DEST]]
b_dest:
  %e = function_ref @e : $@convention(thin) () -> ()
  apply %e() : $@convention(thin) () -> ()
  br end

// CHECK-64: ; <label>:[[C_DEST]]
c_dest:
  %f = function_ref @f : $@convention(thin) () -> ()
  apply %f() : $@convention(thin) () -> ()
  br end

end:
  %v = tuple ()
  return %v : $()
}

// CHECK-64: define{{( protected)?}} swiftcc void @multi_payload_no_spare_bits_switch_indirect(%T4enum23MultiPayloadNoSpareBitsO* nocapture dereferenceable({{.*}})) {{.*}} {
sil @multi_payload_no_spare_bits_switch_indirect : $(@inout MultiPayloadNoSpareBits) -> () {
entry(%u : $*MultiPayloadNoSpareBits):
// CHECK-64:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum23MultiPayloadNoSpareBitsO* %0 to i64*
// CHECK-64:   [[PAYLOAD:%.*]] = load i64, i64* [[PAYLOAD_ADDR]]
// CHECK-64:   [[T0:%.*]] = getelementptr inbounds %T4enum23MultiPayloadNoSpareBitsO, %T4enum23MultiPayloadNoSpareBitsO* %0, i32 0, i32 1
// CHECK-64:   [[TAG_ADDR:%.*]] = bitcast [1 x i8]* [[T0]] to i8*
// CHECK-64:   [[TAG:%.*]] = load i8, i8* [[TAG_ADDR]]
// CHECK-64:   switch i8 [[TAG]]
// CHECK-64:   switch i64 [[PAYLOAD]]
// CHECK-64: ; <label>:
// CHECK-64:   unreachable
  switch_enum_addr %u : $*MultiPayloadNoSpareBits, case #MultiPayloadNoSpareBits.x!enumelt.1: x_dest, case #MultiPayloadNoSpareBits.y!enumelt.1: y_dest, case #MultiPayloadNoSpareBits.z!enumelt.1: z_dest, case #MultiPayloadNoSpareBits.a!enumelt: a_dest, case #MultiPayloadNoSpareBits.b!enumelt: b_dest, case #MultiPayloadNoSpareBits.c!enumelt: c_dest

// CHECK-64: ; <label>:[[X_DEST:[0-9]+]]
// CHECK-64:   bitcast %T4enum23MultiPayloadNoSpareBitsO* %0 to i64*
// CHECK-64: ; <label>:[[Y_DEST:[0-9]+]]
// CHECK-64:   bitcast %T4enum23MultiPayloadNoSpareBitsO* %0 to i32*
// CHECK-64: ; <label>:[[Z_DEST:[0-9]+]]
// CHECK-64:   bitcast %T4enum23MultiPayloadNoSpareBitsO* %0 to i63*

x_dest:
  %x = unchecked_take_enum_data_addr %u : $*MultiPayloadNoSpareBits, #MultiPayloadNoSpareBits.x!enumelt.1
  br end

y_dest:
  %y = unchecked_take_enum_data_addr %u : $*MultiPayloadNoSpareBits, #MultiPayloadNoSpareBits.y!enumelt.1
  br end

z_dest:
  %z = unchecked_take_enum_data_addr %u : $*MultiPayloadNoSpareBits, #MultiPayloadNoSpareBits.z!enumelt.1
  br end

a_dest:
  br end

b_dest:
  br end

c_dest:
  br end

end:
  %v = tuple ()
  return %v : $()
}

// CHECK-64: define{{( protected)?}} swiftcc { i64, i8 } @multi_payload_no_spare_bit_inject_x(i64) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[RES_0:%.*]] = insertvalue { i64, i8 } undef, i64 %0, 0
// CHECK-64:   [[RES:%.*]] = insertvalue { i64, i8 } [[RES_0]], i8 0, 1
// CHECK-64:   ret { i64, i8 } [[RES]]
// CHECK-64: }
sil @multi_payload_no_spare_bit_inject_x : $(Builtin.Int64) -> MultiPayloadNoSpareBits {
entry(%0 : $Builtin.Int64):
  %u = enum $MultiPayloadNoSpareBits, #MultiPayloadNoSpareBits.x!enumelt.1, %0 : $Builtin.Int64
  return %u : $MultiPayloadNoSpareBits
}

// CHECK-64: define{{( protected)?}} swiftcc void @multi_payload_no_spare_bit_inject_x_indirect(i64, %T4enum23MultiPayloadNoSpareBitsO* nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[DATA_ADDR:%.*]] = bitcast %T4enum23MultiPayloadNoSpareBitsO* %1 to i64*
// CHECK-64:   store i64 %0, i64* [[DATA_ADDR]]
// CHECK-64:   [[T0:%.*]] = getelementptr inbounds %T4enum23MultiPayloadNoSpareBitsO, %T4enum23MultiPayloadNoSpareBitsO* %1, i32 0, i32 1
// CHECK-64:   [[TAG_ADDR:%.*]] = bitcast [1 x i8]* [[T0]] to i8*
// CHECK-64:   store i8 0, i8* [[TAG_ADDR]]
// CHECK-64:   ret void
// CHECK-64: }
sil @multi_payload_no_spare_bit_inject_x_indirect : $(Builtin.Int64, @inout MultiPayloadNoSpareBits) -> () {
entry(%0 : $Builtin.Int64, %1 : $*MultiPayloadNoSpareBits):
  %a = init_enum_data_addr %1 : $*MultiPayloadNoSpareBits, #MultiPayloadNoSpareBits.x!enumelt.1
  store %0 to %a : $*Builtin.Int64
  inject_enum_addr %1 : $*MultiPayloadNoSpareBits, #MultiPayloadNoSpareBits.x!enumelt.1
  %v = tuple ()
  return %v : $()
}

// CHECK-64: define{{( protected)?}} swiftcc { i64, i8 } @multi_payload_no_spare_bit_inject_y(i32) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[ZEXT:%.*]] = zext i32 %0 to i64
// CHECK-64:   [[RES_0:%.*]] = insertvalue { i64, i8 } undef, i64 [[ZEXT]], 0
// CHECK-64:   [[RES:%.*]] = insertvalue { i64, i8 } [[RES_0]], i8 1, 1
// CHECK-64:   ret { i64, i8 } [[RES]]
// CHECK-64: }
sil @multi_payload_no_spare_bit_inject_y : $(Builtin.Int32) -> MultiPayloadNoSpareBits {
entry(%0 : $Builtin.Int32):
  %u = enum $MultiPayloadNoSpareBits, #MultiPayloadNoSpareBits.y!enumelt.1, %0 : $Builtin.Int32
  return %u : $MultiPayloadNoSpareBits
}

// CHECK-64: define{{( protected)?}} swiftcc { i64, i8 } @multi_payload_no_spare_bit_inject_z(i64) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[NATIVECC_TRUNC:%.*]] = trunc i64 %0 to i63
// CHECK-64:   [[ZEXT:%.*]] = zext i63 [[NATIVECC_TRUNC]] to i64
// CHECK-64:   [[RES_0:%.*]] = insertvalue { i64, i8 } undef, i64 [[ZEXT]], 0
// CHECK-64:   [[RES:%.*]] = insertvalue { i64, i8 } [[RES_0]], i8 2, 1
// CHECK-64:   ret { i64, i8 } [[RES]]
// CHECK-64: }
sil @multi_payload_no_spare_bit_inject_z : $(Builtin.Int63) -> MultiPayloadNoSpareBits {
entry(%0 : $Builtin.Int63):
  %u = enum $MultiPayloadNoSpareBits, #MultiPayloadNoSpareBits.z!enumelt.1, %0 : $Builtin.Int63
  return %u : $MultiPayloadNoSpareBits
}

// CHECK-64: define{{( protected)?}} swiftcc { i64, i8 } @multi_payload_no_spare_bit_inject_a() {{.*}} {
// CHECK-64: entry:
// CHECK-64:   ret { i64, i8 } { i64 0, i8 3 }
// CHECK-64: }
sil @multi_payload_no_spare_bit_inject_a : $() -> MultiPayloadNoSpareBits {
entry:
  %u = enum $MultiPayloadNoSpareBits, #MultiPayloadNoSpareBits.a!enumelt
  return %u : $MultiPayloadNoSpareBits
}

// CHECK-64: define{{( protected)?}} swiftcc void @multi_payload_no_spare_bit_inject_a_indirect(%T4enum23MultiPayloadNoSpareBitsO* nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum23MultiPayloadNoSpareBitsO* %0 to i64*
// CHECK-64:   store i64 0, i64* [[PAYLOAD_ADDR]]
// CHECK-64:   [[T0:%.*]] = getelementptr inbounds %T4enum23MultiPayloadNoSpareBitsO, %T4enum23MultiPayloadNoSpareBitsO* %0, i32 0, i32 1
// CHECK-64:   [[TAG_ADDR:%.*]] = bitcast [1 x i8]* [[T0]] to i8*
// CHECK-64:   store i8 3, i8* [[TAG_ADDR]]
// CHECK-64:   ret void
// CHECK-64: }
sil @multi_payload_no_spare_bit_inject_a_indirect : $(@inout MultiPayloadNoSpareBits) -> () {
entry(%0 : $*MultiPayloadNoSpareBits):
  inject_enum_addr %0 : $*MultiPayloadNoSpareBits, #MultiPayloadNoSpareBits.a!enumelt
  %v = tuple ()
  return %v : $()
}

// CHECK-64: define{{( protected)?}} swiftcc { i64, i8 } @multi_payload_no_spare_bit_inject_b() {{.*}} {
// CHECK-64: entry:
// CHECK-64:   ret { i64, i8 } { i64 1, i8 3 }
// CHECK-64: }
sil @multi_payload_no_spare_bit_inject_b : $() -> MultiPayloadNoSpareBits {
entry:
  %u = enum $MultiPayloadNoSpareBits, #MultiPayloadNoSpareBits.b!enumelt
  return %u : $MultiPayloadNoSpareBits
}

// CHECK-64: define{{( protected)?}} swiftcc { i64, i8 } @multi_payload_no_spare_bit_inject_c() {{.*}} {
// CHECK-64: entry:
// CHECK-64:   ret { i64, i8 } { i64 2, i8 3 }
// CHECK-64: }
sil @multi_payload_no_spare_bit_inject_c : $() -> MultiPayloadNoSpareBits {
entry:
  %u = enum $MultiPayloadNoSpareBits, #MultiPayloadNoSpareBits.c!enumelt
  return %u : $MultiPayloadNoSpareBits
}

enum MultiPayloadOneSpareBit {
  case x(Builtin.Int62)
  case y(Builtin.Int63)
  case z(Builtin.Int61)
  case a
  case b
  case c
}

// CHECK-64: define{{( protected)?}} swiftcc void @multi_payload_one_spare_bit_switch(i64, i8) {{.*}} {
sil @multi_payload_one_spare_bit_switch : $(MultiPayloadOneSpareBit) -> () {
entry(%u : $MultiPayloadOneSpareBit):
// CHECK-64:   [[NATIVECC_TRUNC:%.*]] = trunc i8 %1 to i1
// CHECK-64:   [[SPARE_TAG_LSHR:%.*]] = lshr i64 %0, 63
// CHECK-64:   [[SPARE_TAG_TRUNC:%.*]] = trunc i64 [[SPARE_TAG_LSHR]] to i8
// CHECK-64:   [[SPARE_TAG:%.*]] = and i8 [[SPARE_TAG_TRUNC]], 1
// CHECK-64:   [[EXTRA_TAG_ZEXT:%.*]] = zext i1 [[NATIVECC_TRUNC]] to i8
// CHECK-64:   [[EXTRA_TAG:%.*]] = shl i8 [[EXTRA_TAG_ZEXT]], 1
// CHECK-64:   [[TAG:%.*]] = or i8 [[SPARE_TAG]], [[EXTRA_TAG]]
// CHECK-64:   switch i8 [[TAG]], label %[[UNREACHABLE:[0-9]+]] [
// CHECK-64:     i8 0, label %[[X_PREDEST:[0-9]+]]
// CHECK-64:     i8 1, label %[[Y_PREDEST:[0-9]+]]
// CHECK-64:     i8 2, label %[[Z_PREDEST:[0-9]+]]
// CHECK-64:     i8 3, label %[[EMPTY_DEST:[0-9]+]]
// CHECK-64:   ]

// CHECK-64: ; <label>:[[EMPTY_DEST]]
// CHECK-64:   switch i64 %0, label %[[UNREACHABLE]] [
// --            0x8000_0000_0000_0000
// CHECK-64:     i64 -9223372036854775808, label %[[A_DEST:[0-9]+]]
// --            0x8000_0000_0000_0001
// CHECK-64:     i64 -9223372036854775807, label %[[B_DEST:[0-9]+]]
// --            0x8000_0000_0000_0002
// CHECK-64:     i64 -9223372036854775806, label %[[C_DEST:[0-9]+]]
// CHECK-64:   ]

// CHECK-64: ; <label>:[[UNREACHABLE]]
// CHECK-64:   unreachable
  switch_enum %u : $MultiPayloadOneSpareBit, case #MultiPayloadOneSpareBit.x!enumelt.1: x_dest, case #MultiPayloadOneSpareBit.y!enumelt.1: y_dest, case #MultiPayloadOneSpareBit.z!enumelt.1: z_dest, case #MultiPayloadOneSpareBit.a!enumelt: a_dest, case #MultiPayloadOneSpareBit.b!enumelt: b_dest, case #MultiPayloadOneSpareBit.c!enumelt: c_dest

// CHECK-64: ; <label>:[[X_PREDEST]]
// CHECK-64:   [[X_VALUE:%.*]] = trunc i64 %0 to i62
// CHECK-64:   br label %[[X_DEST:[0-9]+]]
// CHECK-64: ; <label>:[[Y_PREDEST]]
// --                                    0x7FFF_FFFF_FFFF_FFFF
// CHECK-64:   [[Y_MASKED:%.*]] = and i64 %0, 9223372036854775807
// CHECK-64:   [[Y_VALUE:%.*]] = trunc i64 [[Y_MASKED]] to i63
// CHECK-64:   br label %[[Y_DEST:[0-9]+]]
// CHECK-64: ; <label>:[[Z_PREDEST]]
// CHECK-64:   [[Z_VALUE:%.*]] = trunc i64 %0 to i61
// CHECK-64:   br label %[[Z_DEST:[0-9]+]]

// CHECK-64: ; <label>:[[X_DEST]]
// CHECK-64:   phi i62 [ [[X_VALUE]], %[[X_PREDEST]] ]
x_dest(%x : $Builtin.Int62):
  %a = function_ref @a : $@convention(thin) () -> ()
  apply %a() : $@convention(thin) () -> ()
  br end

// CHECK-64: ; <label>:[[Y_DEST]]
// CHECK-64:   phi i63 [ [[Y_VALUE]], %[[Y_PREDEST]] ]
y_dest(%y : $Builtin.Int63):
  %b = function_ref @b : $@convention(thin) () -> ()
  apply %b() : $@convention(thin) () -> ()
  br end

// CHECK-64: ; <label>:[[Z_DEST]]
// CHECK-64:   phi i61 [ [[Z_VALUE]], %[[Z_PREDEST]] ]
z_dest(%z : $Builtin.Int61):
  %c = function_ref @c : $@convention(thin) () -> ()
  apply %c() : $@convention(thin) () -> ()
  br end

// CHECK-64: ; <label>:[[A_DEST]]
a_dest:
  %d = function_ref @d : $@convention(thin) () -> ()
  apply %d() : $@convention(thin) () -> ()
  br end

// CHECK-64: ; <label>:[[B_DEST]]
b_dest:
  %e = function_ref @e : $@convention(thin) () -> ()
  apply %e() : $@convention(thin) () -> ()
  br end

// CHECK-64: ; <label>:[[C_DEST]]
c_dest:
  %f = function_ref @f : $@convention(thin) () -> ()
  apply %f() : $@convention(thin) () -> ()
  br end

end:
  %v = tuple ()
  return %v : $()
}

sil @multi_payload_one_spare_bit_switch_indirect : $(@inout MultiPayloadOneSpareBit) -> () {
entry(%u : $*MultiPayloadOneSpareBit):
// CHECK-64:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum23MultiPayloadOneSpareBitO* %0 to i64*
// CHECK-64:   [[PAYLOAD:%.*]] = load i64, i64* [[PAYLOAD_ADDR]]
// CHECK-64:   [[T0:%.*]] = getelementptr inbounds %T4enum23MultiPayloadOneSpareBitO, %T4enum23MultiPayloadOneSpareBitO* %0, i32 0, i32 1
// CHECK-64:   [[TAG_ADDR:%.*]] = bitcast [1 x i8]* [[T0]] to i1*
// CHECK-64:   [[TAG:%.*]] = load i1, i1* [[TAG_ADDR]]
// CHECK-64:   switch i8 {{%.*}}
// CHECK-64:   switch i64 [[PAYLOAD]]
// CHECK-64: ; <label>:
// CHECK-64:   unreachable
  switch_enum_addr %u : $*MultiPayloadOneSpareBit, case #MultiPayloadOneSpareBit.x!enumelt.1: x_dest, case #MultiPayloadOneSpareBit.y!enumelt.1: y_dest, case #MultiPayloadOneSpareBit.z!enumelt.1: z_dest, case #MultiPayloadOneSpareBit.a!enumelt: a_dest, case #MultiPayloadOneSpareBit.b!enumelt: b_dest, case #MultiPayloadOneSpareBit.c!enumelt: c_dest

// CHECK-64: ; <label>:[[X_PREDEST:[0-9]+]]
// CHECK-64:   bitcast %T4enum23MultiPayloadOneSpareBitO* %0 to i62*

// CHECK-64: ; <label>:[[Y_PREDEST:[0-9]+]]
// CHECK-64:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum23MultiPayloadOneSpareBitO* %0 to i64*
// CHECK-64:   [[PAYLOAD:%.*]] = load i64, i64* [[PAYLOAD_ADDR]]
// --                                                   0x7FFF_FFFF_FFFF_FFFF
// CHECK-64:   [[PAYLOAD_MASKED:%.*]] = and i64 [[PAYLOAD]], 9223372036854775807
// CHECK-64:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum23MultiPayloadOneSpareBitO* %0 to i64*
// CHECK-64:   store i64 [[PAYLOAD_MASKED]], i64* [[PAYLOAD_ADDR]]
// CHECK-64:   bitcast %T4enum23MultiPayloadOneSpareBitO* %0 to i63*

// CHECK-64: ; <label>:[[Z_PREDEST:[0-9]+]]
// CHECK-64:   bitcast %T4enum23MultiPayloadOneSpareBitO* %0 to i61*

x_dest:
  %x = unchecked_take_enum_data_addr %u : $*MultiPayloadOneSpareBit, #MultiPayloadOneSpareBit.x!enumelt.1
  br end

y_dest:
  %y = unchecked_take_enum_data_addr %u : $*MultiPayloadOneSpareBit, #MultiPayloadOneSpareBit.y!enumelt.1
  br end

z_dest:
  %z = unchecked_take_enum_data_addr %u : $*MultiPayloadOneSpareBit, #MultiPayloadOneSpareBit.z!enumelt.1
  br end

a_dest:
  br end

b_dest:
  br end

c_dest:
  br end

end:
  %v = tuple ()
  return %v : $()
}

// CHECK-64: define{{( protected)?}} swiftcc { i64, i8 } @multi_payload_one_spare_bit_inject_x(i64) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[NATIVECC_TRUNC:%.*]] = trunc i64 %0 to i62
// CHECK-64:   [[ZEXT:%.*]] = zext i62 [[NATIVECC_TRUNC]] to i64
// CHECK-64:   [[RES_0:%.*]] = insertvalue { i64, i8 } undef, i64 [[ZEXT]], 0
// CHECK-64:   [[RES:%.*]] = insertvalue { i64, i8 } [[RES_0]], i8 0, 1
// CHECK-64:   ret { i64, i8 } [[RES]]
// CHECK-64: }
sil @multi_payload_one_spare_bit_inject_x : $(Builtin.Int62) -> MultiPayloadOneSpareBit {
entry(%0 : $Builtin.Int62):
  %u = enum $MultiPayloadOneSpareBit, #MultiPayloadOneSpareBit.x!enumelt.1, %0 : $Builtin.Int62
  return %u : $MultiPayloadOneSpareBit
}

// CHECK-64: define{{( protected)?}} swiftcc void @multi_payload_one_spare_bit_inject_x_indirect(i64, %T4enum23MultiPayloadOneSpareBitO* nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[NATIVECC_TRUNC:%.*]] = trunc i64 %0 to i62
// CHECK-64:   [[DATA_ADDR:%.*]] = bitcast %T4enum23MultiPayloadOneSpareBitO* %1 to i62*
// CHECK-64:   store i62 [[NATIVECC_TRUNC]], i62* [[DATA_ADDR]]
// CHECK-64:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum23MultiPayloadOneSpareBitO* %1 to i64*
// CHECK-64:   [[PAYLOAD:%.*]] = load i64, i64* [[PAYLOAD_ADDR]]
// --                                                   0x7FFF_FFFF_FFFF_FFFF
// CHECK-64:   [[PAYLOAD_MASKED:%.*]] = and i64 [[PAYLOAD]], 9223372036854775807
// CHECK-64:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum23MultiPayloadOneSpareBitO* %1 to i64*
// CHECK-64:   store i64 [[PAYLOAD_MASKED]], i64* [[PAYLOAD_ADDR]]
// CHECK-64:   [[T0:%.*]] = getelementptr inbounds %T4enum23MultiPayloadOneSpareBitO, %T4enum23MultiPayloadOneSpareBitO* %1, i32 0, i32 1
// CHECK-64:   [[TAG_ADDR:%.*]] = bitcast [1 x i8]* [[T0]] to i1*
// CHECK-64:   store i1 false, i1* [[TAG_ADDR]]
// CHECK-64:   ret void
// CHECK-64: }
sil @multi_payload_one_spare_bit_inject_x_indirect : $(Builtin.Int62, @inout MultiPayloadOneSpareBit) -> () {
entry(%0 : $Builtin.Int62, %1 : $*MultiPayloadOneSpareBit):
  %a = init_enum_data_addr %1 : $*MultiPayloadOneSpareBit, #MultiPayloadOneSpareBit.x!enumelt.1
  store %0 to %a : $*Builtin.Int62
  inject_enum_addr %1 : $*MultiPayloadOneSpareBit, #MultiPayloadOneSpareBit.x!enumelt.1
  %v = tuple ()
  return %v : $()
}

// CHECK-64: define{{( protected)?}} swiftcc { i64, i8 } @multi_payload_one_spare_bit_inject_y(i64) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[NATIVECC_TRUNC:%.*]] = trunc i64 %0 to i63
// CHECK-64:   [[ZEXT:%.*]] = zext i63 [[NATIVECC_TRUNC]] to i64
// --                                        0x8000_0000_0000_0000
// CHECK-64:   [[TAGGED:%.*]] = or i64 [[ZEXT]], -9223372036854775808
// CHECK-64:   [[RES_0:%.*]] = insertvalue { i64, i8 } undef, i64 [[TAGGED]], 0
// CHECK-64:   [[RES:%.*]] = insertvalue { i64, i8 } [[RES_0]], i8 0, 1
// CHECK-64:   ret { i64, i8 } [[RES]]
// CHECK-64: }
sil @multi_payload_one_spare_bit_inject_y : $(Builtin.Int63) -> MultiPayloadOneSpareBit {
entry(%0 : $Builtin.Int63):
  %u = enum $MultiPayloadOneSpareBit, #MultiPayloadOneSpareBit.y!enumelt.1, %0 : $Builtin.Int63
  return %u : $MultiPayloadOneSpareBit
}

// CHECK-64: define{{( protected)?}} swiftcc void @multi_payload_one_spare_bit_inject_y_indirect(i64, %T4enum23MultiPayloadOneSpareBitO* nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[NATIVECC_TRUNC:%.*]] = trunc i64 %0 to i63
// CHECK-64:   [[DATA_ADDR:%.*]] = bitcast %T4enum23MultiPayloadOneSpareBitO* %1 to i63*
// CHECK-64:   store i63 [[NATIVECC_TRUNC]], i63* [[DATA_ADDR]]
// CHECK-64:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum23MultiPayloadOneSpareBitO* %1 to i64*
// CHECK-64:   [[PAYLOAD:%.*]] = load i64, i64* [[PAYLOAD_ADDR]]
// --                                                   0x7FFF_FFFF_FFFF_FFFF
// CHECK-64:   [[PAYLOAD_MASKED:%.*]] = and i64 [[PAYLOAD]], 9223372036854775807
// --                                                          0x8000_0000_0000_0000
// CHECK-64:   [[PAYLOAD_TAGGED:%.*]] = or i64 [[PAYLOAD_MASKED]], -9223372036854775808
// CHECK-64:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum23MultiPayloadOneSpareBitO* %1 to i64*
// CHECK-64:   store i64 [[PAYLOAD_TAGGED]], i64* [[PAYLOAD_ADDR]]
// CHECK-64:   [[T0:%.*]] = getelementptr inbounds %T4enum23MultiPayloadOneSpareBitO, %T4enum23MultiPayloadOneSpareBitO* %1, i32 0, i32 1
// CHECK-64:   [[TAG_ADDR:%.*]] = bitcast [1 x i8]* [[T0]] to i1*
// CHECK-64:   store i1 false, i1* [[TAG_ADDR]]
// CHECK-64:   ret void
// CHECK-64: }

sil @multi_payload_one_spare_bit_inject_y_indirect : $(Builtin.Int63, @inout MultiPayloadOneSpareBit) -> () {
entry(%0 : $Builtin.Int63, %1 : $*MultiPayloadOneSpareBit):
  %a = init_enum_data_addr %1 : $*MultiPayloadOneSpareBit, #MultiPayloadOneSpareBit.y!enumelt.1
  store %0 to %a : $*Builtin.Int63
  inject_enum_addr %1 : $*MultiPayloadOneSpareBit, #MultiPayloadOneSpareBit.y!enumelt.1
  %v = tuple ()
  return %v : $()
}

// CHECK-64: define{{( protected)?}} swiftcc { i64, i8 } @multi_payload_one_spare_bit_inject_z(i64) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[NATIVECC_TRUNC:%.*]] = trunc i64 %0 to i61
// CHECK-64:   [[ZEXT:%.*]] = zext i61 [[NATIVECC_TRUNC]] to i64
// CHECK-64:   [[RES_0:%.*]] = insertvalue { i64, i8 } undef, i64 [[ZEXT]], 0
// CHECK-64:   [[RES:%.*]] = insertvalue { i64, i8 } [[RES_0]], i8 1, 1
// CHECK-64:   ret { i64, i8 } [[RES]]
// CHECK-64: }
sil @multi_payload_one_spare_bit_inject_z : $(Builtin.Int61) -> MultiPayloadOneSpareBit {
entry(%0 : $Builtin.Int61):
  %u = enum $MultiPayloadOneSpareBit, #MultiPayloadOneSpareBit.z!enumelt.1, %0 : $Builtin.Int61
  return %u : $MultiPayloadOneSpareBit
}

// CHECK-64: define{{( protected)?}} swiftcc { i64, i8 } @multi_payload_one_spare_bit_inject_a() {{.*}} {
// CHECK-64: entry:
// --                            0x8000_0000_0000_0000
// CHECK-64:   ret { i64, i8 } { i64 -9223372036854775808, i8 1 }
// CHECK-64: }
sil @multi_payload_one_spare_bit_inject_a : $() -> MultiPayloadOneSpareBit {
entry:
  %u = enum $MultiPayloadOneSpareBit, #MultiPayloadOneSpareBit.a!enumelt
  return %u : $MultiPayloadOneSpareBit
}

// CHECK-64: define{{( protected)?}} swiftcc void @multi_payload_one_spare_bit_inject_a_indirect(%T4enum23MultiPayloadOneSpareBitO* nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum23MultiPayloadOneSpareBitO* %0 to i64*
// --                0x8000_0000_0000_0000
// CHECK-64:   store i64 -9223372036854775808, i64* [[PAYLOAD_ADDR]]
// CHECK-64:   [[T0:%.*]] = getelementptr inbounds %T4enum23MultiPayloadOneSpareBitO, %T4enum23MultiPayloadOneSpareBitO* %0, i32 0, i32 1
// CHECK-64:   [[TAG_ADDR:%.*]] = bitcast [1 x i8]* [[T0]] to i1*
// CHECK-64:   store i1 true, i1* [[TAG_ADDR]]
// CHECK-64:   ret void
// CHECK-64: }
sil @multi_payload_one_spare_bit_inject_a_indirect : $(@inout MultiPayloadOneSpareBit) -> () {
entry(%0 : $*MultiPayloadOneSpareBit):
  inject_enum_addr %0 : $*MultiPayloadOneSpareBit, #MultiPayloadOneSpareBit.a!enumelt
  %v = tuple ()
  return %v : $()
}

// CHECK-64: define{{( protected)?}} swiftcc { i64, i8 } @multi_payload_one_spare_bit_inject_b() {{.*}} {
// CHECK-64: entry:
// --                            0x8000_0000_0000_0001
// CHECK-64:   ret { i64, i8 } { i64 -9223372036854775807, i8 1 }
// CHECK-64: }
sil @multi_payload_one_spare_bit_inject_b : $() -> MultiPayloadOneSpareBit {
entry:
  %u = enum $MultiPayloadOneSpareBit, #MultiPayloadOneSpareBit.b!enumelt
  return %u : $MultiPayloadOneSpareBit
}

// CHECK-64: define{{( protected)?}} swiftcc { i64, i8 } @multi_payload_one_spare_bit_inject_c() {{.*}} {
// CHECK-64: entry:
// --                            0x8000_0000_0000_0002
// CHECK-64:   ret { i64, i8 } { i64 -9223372036854775806, i8 1 }
// CHECK-64: }
sil @multi_payload_one_spare_bit_inject_c : $() -> MultiPayloadOneSpareBit {
entry:
  %u = enum $MultiPayloadOneSpareBit, #MultiPayloadOneSpareBit.c!enumelt
  return %u : $MultiPayloadOneSpareBit
}


enum MultiPayloadTwoSpareBits {
  case x(Builtin.Int62)
  case y(Builtin.Int60)
  case z(Builtin.Int61)
  case a
  case b
  case c
}

// CHECK-64: define{{( protected)?}} swiftcc void @multi_payload_two_spare_bits_switch(i64) {{.*}} {
sil @multi_payload_two_spare_bits_switch : $(MultiPayloadTwoSpareBits) -> () {
entry(%u : $MultiPayloadTwoSpareBits):
// CHECK-64:   [[TAG_LSHR:%.*]] = lshr i64 %0, 62
// CHECK-64:   [[TAG_BYTE:%.*]] = trunc i64 [[TAG_LSHR]] to i8
// CHECK-64:   [[TAG:%.*]] = and i8 [[TAG_BYTE]], 3
// CHECK-64:   switch i8 [[TAG]], label %[[UNREACHABLE:[0-9]+]] [
// CHECK-64:     i8 0, label %[[X_PREDEST:[0-9]+]]
// CHECK-64:     i8 1, label %[[Y_PREDEST:[0-9]+]]
// CHECK-64:     i8 2, label %[[Z_PREDEST:[0-9]+]]
// CHECK-64:     i8 3, label %[[EMPTY_DEST:[0-9]+]]
// CHECK-64:   ]
// CHECK-64: ; <label>:[[EMPTY_DEST]]
// CHECK-64:   switch i64 %0, label %[[UNREACHABLE]] [
// --            0xC000_0000_0000_0000
// CHECK-64:     i64 -4611686018427387904, label %[[A_DEST:[0-9]+]]
// --            0xC000_0000_0000_0001
// CHECK-64:     i64 -4611686018427387903, label %[[B_DEST:[0-9]+]]
// --            0xC000_0000_0000_0002
// CHECK-64:     i64 -4611686018427387902, label %[[C_DEST:[0-9]+]]
// CHECK-64:   ]
// CHECK-64: ; <label>:[[UNREACHABLE]]
// CHECK-64:   unreachable
  switch_enum %u : $MultiPayloadTwoSpareBits, case #MultiPayloadTwoSpareBits.x!enumelt.1: x_dest, case #MultiPayloadTwoSpareBits.y!enumelt.1: y_dest, case #MultiPayloadTwoSpareBits.z!enumelt.1: z_dest, case #MultiPayloadTwoSpareBits.a!enumelt: a_dest, case #MultiPayloadTwoSpareBits.b!enumelt: b_dest, case #MultiPayloadTwoSpareBits.c!enumelt: c_dest

// CHECK-64: ; <label>:[[X_PREDEST]]
// CHECK-64:   [[X_VALUE:%.*]] = trunc i64 %0 to i62
// CHECK-64:   br label %[[X_DEST:[0-9]+]]

// CHECK-64: ; <label>:[[Y_PREDEST]]
// --                                    0x3FFF_FFFF_FFFF_FFFF
// CHECK-64:   [[Y_MASKED:%.*]] = and i64 %0, 4611686018427387903
// CHECK-64:   [[Y_VALUE:%.*]] = trunc i64 [[Y_MASKED]] to i60
// CHECK-64:   br label %[[Y_DEST:[0-9]+]]

// CHECK-64: ; <label>:[[Z_PREDEST]]
// --                                    0x3FFF_FFFF_FFFF_FFFF
// CHECK-64:   [[Z_MASKED:%.*]] = and i64 %0, 4611686018427387903
// CHECK-64:   [[Z_VALUE:%.*]] = trunc i64 [[Z_MASKED]] to i61
// CHECK-64:   br label %[[Z_DEST:[0-9]+]]

// CHECK-64: ; <label>:[[X_DEST]]
// CHECK-64:   phi i62 [ [[X_VALUE]], %[[X_PREDEST]] ]
x_dest(%x : $Builtin.Int62):
  %a = function_ref @a : $@convention(thin) () -> ()
  apply %a() : $@convention(thin) () -> ()
  br end

// CHECK-64: ; <label>:[[Y_DEST]]
// CHECK-64:   phi i60 [ [[Y_VALUE]], %[[Y_PREDEST]] ]
y_dest(%y : $Builtin.Int60):
  %b = function_ref @b : $@convention(thin) () -> ()
  apply %b() : $@convention(thin) () -> ()
  br end

// CHECK-64: ; <label>:[[Z_DEST]]
// CHECK-64:   phi i61 [ [[Z_VALUE]], %[[Z_PREDEST]] ]
z_dest(%z : $Builtin.Int61):
  %c = function_ref @c : $@convention(thin) () -> ()
  apply %c() : $@convention(thin) () -> ()
  br end

// CHECK-64: ; <label>:[[A_DEST]]
a_dest:
  %d = function_ref @d : $@convention(thin) () -> ()
  apply %d() : $@convention(thin) () -> ()
  br end

// CHECK-64: ; <label>:[[B_DEST]]
b_dest:
  %e = function_ref @e : $@convention(thin) () -> ()
  apply %e() : $@convention(thin) () -> ()
  br end

// CHECK-64: ; <label>:[[C_DEST]]
c_dest:
  %f = function_ref @f : $@convention(thin) () -> ()
  apply %f() : $@convention(thin) () -> ()
  br end

end:
  %v = tuple ()
  return %v : $()
}

// CHECK-64: define{{( protected)?}} swiftcc i64 @multi_payload_two_spare_bits_inject_x(i64) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[NATIVECC_TRUNC:%.*]] = trunc i64 %0 to i62
// CHECK-64:   [[ZEXT:%.*]] = zext i62 [[NATIVECC_TRUNC]] to i64
// CHECK-64:   ret i64 [[ZEXT]]
// CHECK-64: }
sil @multi_payload_two_spare_bits_inject_x : $(Builtin.Int62) -> MultiPayloadTwoSpareBits {
entry(%0 : $Builtin.Int62):
  %u = enum $MultiPayloadTwoSpareBits, #MultiPayloadTwoSpareBits.x!enumelt.1, %0 : $Builtin.Int62
  return %u : $MultiPayloadTwoSpareBits
}

// CHECK-64: define{{( protected)?}} swiftcc void @multi_payload_two_spare_bits_inject_x_indirect(i64, %T4enum24MultiPayloadTwoSpareBitsO* nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[NATIVECC_TRUNC:%.*]] = trunc i64 %0 to i62
// CHECK-64:   [[DATA_ADDR:%.*]] = bitcast %T4enum24MultiPayloadTwoSpareBitsO* %1 to i62*
// CHECK-64:   store i62 [[NATIVECC_TRUNC]], i62* [[DATA_ADDR]]
// CHECK-64:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum24MultiPayloadTwoSpareBitsO* %1 to i64*
// CHECK-64:   [[PAYLOAD:%.*]] = load i64, i64* [[PAYLOAD_ADDR]]
// --                                                   0x3FFF_FFFF_FFFF_FFFF
// CHECK-64:   [[PAYLOAD_MASKED:%.*]] = and i64 [[PAYLOAD]], 4611686018427387903
// CHECK-64:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum24MultiPayloadTwoSpareBitsO* %1 to i64*
// CHECK-64:   store i64 [[PAYLOAD_MASKED]], i64* [[PAYLOAD_ADDR]]
// CHECK-64:   ret void
// CHECK-64: }
sil @multi_payload_two_spare_bits_inject_x_indirect : $(Builtin.Int62, @inout MultiPayloadTwoSpareBits) -> () {
entry(%0 : $Builtin.Int62, %1 : $*MultiPayloadTwoSpareBits):
  %a = init_enum_data_addr %1 : $*MultiPayloadTwoSpareBits, #MultiPayloadTwoSpareBits.x!enumelt.1
  store %0 to %a : $*Builtin.Int62
  inject_enum_addr %1 : $*MultiPayloadTwoSpareBits, #MultiPayloadTwoSpareBits.x!enumelt.1
  %v = tuple ()
  return %v : $()
}

// CHECK-64: define{{( protected)?}} swiftcc i64 @multi_payload_two_spare_bits_inject_y(i64) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[NATIVECC_TRUNC:%.*]] = trunc i64 %0 to i60
// CHECK-64:   [[ZEXT:%.*]] = zext i60 [[NATIVECC_TRUNC]] to i64
// --                     0x4000_0000_0000_0000
// CHECK-64:   [[TAGGED:%.*]] = or i64 [[ZEXT]], 4611686018427387904
// CHECK-64:   ret i64 [[TAGGED]]
// CHECK-64: }
sil @multi_payload_two_spare_bits_inject_y : $(Builtin.Int60) -> MultiPayloadTwoSpareBits {
entry(%0 : $Builtin.Int60):
  %u = enum $MultiPayloadTwoSpareBits, #MultiPayloadTwoSpareBits.y!enumelt.1, %0 : $Builtin.Int60
  return %u : $MultiPayloadTwoSpareBits
}

// CHECK-64: define{{( protected)?}} swiftcc void @multi_payload_two_spare_bits_inject_y_indirect(i64, %T4enum24MultiPayloadTwoSpareBitsO* nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[NATIVECC_TRUNC:%.*]] = trunc i64 %0 to i60
// CHECK-64:   [[DATA_ADDR:%.*]] = bitcast %T4enum24MultiPayloadTwoSpareBitsO* %1 to i60*
// CHECK-64:   store i60 [[NATIVECC_TRUNC]], i60* [[DATA_ADDR]]
// CHECK-64:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum24MultiPayloadTwoSpareBitsO* %1 to i64*
// CHECK-64:   [[PAYLOAD:%.*]] = load i64, i64* [[PAYLOAD_ADDR]]
// --                                                   0x3FFF_FFFF_FFFF_FFFF
// CHECK-64:   [[PAYLOAD_MASKED:%.*]] = and i64 [[PAYLOAD]], 4611686018427387903
// --                                                         0x4000_0000_0000_0000
// CHECK-64:   [[PAYLOAD_TAGGED:%.*]] = or i64 [[PAYLOAD_MASKED]], 4611686018427387904
// CHECK-64:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum24MultiPayloadTwoSpareBitsO* %1 to i64*
// CHECK-64:   store i64 [[PAYLOAD_TAGGED]], i64* [[PAYLOAD_ADDR]]
// CHECK-64:   ret void
// CHECK-64: }
sil @multi_payload_two_spare_bits_inject_y_indirect : $(Builtin.Int60, @inout MultiPayloadTwoSpareBits) -> () {
entry(%0 : $Builtin.Int60, %1 : $*MultiPayloadTwoSpareBits):
  %a = init_enum_data_addr %1 : $*MultiPayloadTwoSpareBits, #MultiPayloadTwoSpareBits.y!enumelt.1
  store %0 to %a : $*Builtin.Int60
  inject_enum_addr %1 : $*MultiPayloadTwoSpareBits, #MultiPayloadTwoSpareBits.y!enumelt.1
  %v = tuple ()
  return %v : $()
}

// CHECK-64: define{{( protected)?}} swiftcc i64 @multi_payload_two_spare_bits_inject_z(i64) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[NATIVECC_TRUNC:%.*]] = trunc i64 %0 to i61
// CHECK-64:   [[ZEXT:%.*]] = zext i61 [[NATIVECC_TRUNC]] to i64
// --                      0x8000_0000_0000_0000
// CHECK-64:   [[TAGGED:%.*]] = or i64 [[ZEXT]], -9223372036854775808
// CHECK-64:   ret i64 [[TAGGED]]
// CHECK-64: }
sil @multi_payload_two_spare_bits_inject_z : $(Builtin.Int61) -> MultiPayloadTwoSpareBits {
entry(%0 : $Builtin.Int61):
  %u = enum $MultiPayloadTwoSpareBits, #MultiPayloadTwoSpareBits.z!enumelt.1, %0 : $Builtin.Int61
  return %u : $MultiPayloadTwoSpareBits
}

// CHECK-64: define{{( protected)?}} swiftcc i64 @multi_payload_two_spare_bits_inject_a() {{.*}} {
// CHECK-64: entry:
// --              0xC000_0000_0000_0000
// CHECK-64:   ret i64 -4611686018427387904
// CHECK-64: }
sil @multi_payload_two_spare_bits_inject_a : $() -> MultiPayloadTwoSpareBits {
entry:
  %u = enum $MultiPayloadTwoSpareBits, #MultiPayloadTwoSpareBits.a!enumelt
  return %u : $MultiPayloadTwoSpareBits
}

// CHECK-64: define{{( protected)?}} swiftcc void @multi_payload_two_spare_bits_inject_a_indirect(%T4enum24MultiPayloadTwoSpareBitsO* nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   [[PAYLOAD_ADDR:%.*]] = bitcast %T4enum24MultiPayloadTwoSpareBitsO* %0 to i64*
// --                0xC000_0000_0000_0000
// CHECK-64:   store i64 -4611686018427387904, i64* [[PAYLOAD_ADDR]]
// CHECK-64:   ret void
// CHECK-64: }
sil @multi_payload_two_spare_bits_inject_a_indirect : $(@inout MultiPayloadTwoSpareBits) -> () {
entry(%0 : $*MultiPayloadTwoSpareBits):
  inject_enum_addr %0 : $*MultiPayloadTwoSpareBits, #MultiPayloadTwoSpareBits.a!enumelt
  %v = tuple ()
  return %v : $()
}

// CHECK-64: define{{( protected)?}} swiftcc i64 @multi_payload_two_spare_bits_inject_b() {{.*}} {
// CHECK-64: entry:
// --              0xC000_0000_0000_0001
// CHECK-64:   ret i64 -4611686018427387903
// CHECK-64: }
sil @multi_payload_two_spare_bits_inject_b : $() -> MultiPayloadTwoSpareBits {
entry:
  %u = enum $MultiPayloadTwoSpareBits, #MultiPayloadTwoSpareBits.b!enumelt
  return %u : $MultiPayloadTwoSpareBits
}

// CHECK-64: define{{( protected)?}} swiftcc i64 @multi_payload_two_spare_bits_inject_c() {{.*}} {
// CHECK-64: entry:
// --              0xC000_0000_0000_0002
// CHECK-64:   ret i64 -4611686018427387902
// CHECK-64: }
sil @multi_payload_two_spare_bits_inject_c : $() -> MultiPayloadTwoSpareBits {
entry:
  %u = enum $MultiPayloadTwoSpareBits, #MultiPayloadTwoSpareBits.c!enumelt
  return %u : $MultiPayloadTwoSpareBits
}

class D {}
sil_vtable D {}

sil @_T04enum1DCfD : $@convention(method) (D) -> ()

enum MultiPayloadClasses {
  case x(C)
  case y(D)
  case z
  case w
}

// CHECK-64-LABEL: define{{( protected)?}} swiftcc void @multi_payload_classes_switch(i64) {{.*}} {
// CHECK-64:   %1 = lshr i64 %0, 62
// CHECK-64:   %2 = trunc i64 %1 to i8
// CHECK-64:   %3 = and i8 %2, 3
// CHECK-64:   switch i8 %3, label {{%.*}} [
// CHECK-64:     i8 0, label {{%.*}}
// CHECK-64:     i8 1, label {{%.*}}
// CHECK-64:     i8 2, label {{%.*}}
// CHECK-64:   ]
// CHECK-64:   switch i64 %0, label {{%.*}} [
// --             0x8000000000000000
// CHECK-64:     i64 -9223372036854775808, label {{%.*}}
// --             0x8000000000000008
// CHECK-64:     i64 -9223372036854775800, label {{%.*}}
// CHECK-64:   ]
// -- Extract x(C)
// CHECK-64:   inttoptr i64 %0 to %T4enum1CC*
// -- Extract y(D)
// --                                     0x3fffffffffffffff
// CHECK-64:   [[MASKED:%.*]] = and i64 %0, 4611686018427387903
// CHECK-64:   inttoptr i64 [[MASKED]] to %T4enum1DC*

// CHECK-32-LABEL: define{{( protected)?}} swiftcc void @multi_payload_classes_switch(i32) {{.*}} {
// CHECK-32:   %1 = trunc i32 %0 to i8
// CHECK-32:   %2 = and i8 %1, 3
// CHECK-32:   switch i8 %2, label {{%.*}} [
// CHECK-32:     i8 0, label {{%.*}}
// CHECK-32:     i8 1, label {{%.*}}
// CHECK-32:     i8 2, label {{%.*}}
// CHECK-32:   ]
// CHECK-32:   switch i32 %0, label {{%.*}} [
// CHECK-32:     i32 2, label {{%.*}}
// CHECK-32:     i32 6, label {{%.*}}
// CHECK-32:   ]
// -- Extract x(C)
// CHECK-32:   inttoptr i32 %0 to %T4enum1CC*
// -- Extract y(D)
// CHECK-32:   [[MASKED:%.*]] = and i32 %0, -4
// CHECK-32:   inttoptr i32 [[MASKED]] to %T4enum1DC*

sil @multi_payload_classes_switch : $(MultiPayloadClasses) -> () {
entry(%c : $MultiPayloadClasses):
  switch_enum %c : $MultiPayloadClasses, case #MultiPayloadClasses.x!enumelt.1: x_dest, case #MultiPayloadClasses.y!enumelt.1: y_dest, case #MultiPayloadClasses.z!enumelt: z_dest, case #MultiPayloadClasses.w!enumelt: w_dest

x_dest(%x : $C):
  br end

y_dest(%y : $D):
  br end

z_dest:
  br end

w_dest:
  br end

end:
  return undef : $()
}

struct S {
  var a: CharLike
  var b: IntLike
}

enum MultiPayloadSpareBitAggregates {
  // Has spare bits in the padding between Int32 and Int64
  case x(Builtin.Int32, Builtin.Int64)
  // Has spare bits in the object pointers
  case y(C, C)
  // Has spare bits in the padding between struct fields
  case z(S)
}

// CHECK-64-LABEL: define{{( protected)?}} swiftcc void @multi_payload_spare_bit_aggregate_switch(i64, i64) {{.*}} {
// CHECK-64:   [[T0:%.*]] = lshr i64 %0, 62
// CHECK-64:   [[TAG_BYTE:%.*]] = trunc i64 [[T0]] to i8
// CHECK-64:   [[TAG:%.*]] = and i8 [[TAG_BYTE]], 3
// CHECK-64:   switch i8 [[TAG]], label {{%.*}} [
// CHECK-64:     i8 0, label %[[X_DEST:[0-9]+]]
// CHECK-64:     i8 1, label %[[Y_DEST:[0-9]+]]
// CHECK-64:     i8 2, label %[[Z_DEST:[0-9]+]]
// CHECK-64:   ]
// CHECK-64: ; <label>:[[X_DEST]]
// CHECK-64:   [[X_0:%.*]] = trunc i64 %0 to i32
// CHECK-64: ; <label>:[[Y_DEST]]
// --                                        0x3fffffffffffffff
// CHECK-64:   [[Y_MASKED:%.*]] = and i64 %0, 4611686018427387903
// CHECK-64:   [[Y_0:%.*]] = inttoptr i64 [[Y_MASKED]] to %T4enum1CC*
// CHECK-64:   [[Y_1:%.*]] = inttoptr i64 %1 to %T4enum1CC*
// CHECK-64: ; <label>:[[Z_DEST]]
// --                                        0x3fffffffffffffff
// CHECK-64:   [[Z_MASKED:%.*]] = and i64 %0, 4611686018427387903
// CHECK-64:   [[Z_A:%.*]] = trunc i64 [[Z_MASKED]] to i21

sil @multi_payload_spare_bit_aggregate_switch : $(MultiPayloadSpareBitAggregates) -> () {
entry(%c : $MultiPayloadSpareBitAggregates):
  switch_enum %c : $MultiPayloadSpareBitAggregates, case #MultiPayloadSpareBitAggregates.x!enumelt.1: x_dest, case #MultiPayloadSpareBitAggregates.y!enumelt.1: y_dest, case #MultiPayloadSpareBitAggregates.z!enumelt.1: z_dest

x_dest(%x : $(Builtin.Int32, Builtin.Int64)):
  br end

y_dest(%y : $(C, C)):
  br end

z_dest(%z : $S):
  br end

end:
  return undef : $()
}

// <rdar://problem/15759464>
enum MultiPayloadInner {
  case A(Builtin.Word)
  case B(Builtin.Word)
}

enum MultiPayloadNested {
  case A(MultiPayloadInner)
  case B(MultiPayloadInner)
}

// CHECK-LABEL: define{{( protected)?}} swiftcc void @multi_payload_nested_switch
// CHECK:   %1 = bitcast %T4enum18MultiPayloadNestedO* %0 to { [[WORD]], i8 }*
// CHECK:   %2 = getelementptr
// CHECK:   %3 = load [[WORD]], [[WORD]]* %2
// CHECK:   %4 = getelementptr
// CHECK:   %5 = load i8, i8* %4
// CHECK:   %6 = lshr i8 %5, 7
// CHECK:   %7 = trunc i8 %6 to i1
// CHECK:   br i1 %7
sil @multi_payload_nested_switch : $(@in MultiPayloadNested) -> () {
entry(%c : $*MultiPayloadNested):
  switch_enum_addr %c : $*MultiPayloadNested, case #MultiPayloadNested.A!enumelt.1: a_dest, case #MultiPayloadNested.B!enumelt.1: b_dest

a_dest:
  br end

b_dest:
  br end

end:
  return undef : $()
}

enum MultiPayloadInnerSpareBits {
  case A(Builtin.NativeObject)
  case B(Builtin.NativeObject)
  case C(Builtin.NativeObject)
  case D(Builtin.NativeObject)
}

enum MultiPayloadNestedSpareBits {
  case A(MultiPayloadInnerSpareBits)
  case B(MultiPayloadInnerSpareBits)
}

// CHECK-64-LABEL: define{{( protected)?}} swiftcc void @multi_payload_nested_spare_bits_switch(%T4enum27MultiPayloadNestedSpareBitsO* noalias nocapture dereferenceable({{.*}})) {{.*}} {
// CHECK-64: entry:
// CHECK-64:   %1 = bitcast %T4enum27MultiPayloadNestedSpareBitsO* %0 to [[WORD]]*
// CHECK-64:   %2 = load [[WORD]], [[WORD]]* %1
// CHECK-64:   %3 = lshr [[WORD]] %2, 61
// CHECK-64:   %4 = trunc [[WORD]] %3 to i1
// CHECK-64:   br i1 %4
sil @multi_payload_nested_spare_bits_switch : $(@in MultiPayloadNestedSpareBits) -> () {
entry(%c : $*MultiPayloadNestedSpareBits):
  switch_enum_addr %c : $*MultiPayloadNestedSpareBits, case #MultiPayloadNestedSpareBits.A!enumelt.1: a_dest, case #MultiPayloadNestedSpareBits.B!enumelt.1: b_dest

a_dest:
  br end

b_dest:
  br end

end:
  return undef : $()
}


// -- test for a switch_enum bug for multi-payload, no-empty-case enums
//    uncovered by Chris
enum OnlyPayloads {
  case x(Builtin.Int64)
  case y(Builtin.Int32)
  case z(Builtin.Int16)
}

sil @only_payloads_switch : $(OnlyPayloads) -> () {
entry(%0 : $OnlyPayloads):
  switch_enum %0 : $OnlyPayloads, case #OnlyPayloads.x!enumelt.1: x_dest, case #OnlyPayloads.y!enumelt.1: y_dest, case #OnlyPayloads.z!enumelt.1: z_dest

x_dest:
  br end
y_dest:
  br end
z_dest:
  br end

end:
  %v = tuple ()
  return %v : $()
}

// Should not use spare bits, because T may be a tagged ObjC pointer.
enum MultiPayloadClassGeneric<T: AnyObject> {
  case A(C, Builtin.Word)
  case B(T)
}

// CHECK-64-LABEL: define{{( protected)?}} swiftcc { i64, i64, i8 } @multi_payload_class_generic_no_spare_bits(i64, i64, i8, %swift.type* %T)
// CHECK-32-LABEL: define{{( protected)?}} swiftcc { i32, i32, i8 } @multi_payload_class_generic_no_spare_bits(i32, i32, i8, %swift.type* %T)
sil @multi_payload_class_generic_no_spare_bits : $@convention(thin) <T: AnyObject> (@owned MultiPayloadClassGeneric<T>) -> MultiPayloadClassGeneric<T> {
entry(%e : $MultiPayloadClassGeneric<T>):
  return %e : $MultiPayloadClassGeneric<T>
}

// CHECK-64-LABEL: define{{( protected)?}} swiftcc { i64, i64, i8 } @multi_payload_class_instance_no_spare_bits(i64, i64, i8)
// CHECK-32-LABEL: define{{( protected)?}} swiftcc { i32, i32, i8 } @multi_payload_class_instance_no_spare_bits(i32, i32, i8)
sil @multi_payload_class_instance_no_spare_bits : $@convention(thin) (@owned MultiPayloadClassGeneric<C>) -> MultiPayloadClassGeneric<C> {
entry(%e : $MultiPayloadClassGeneric<C>):
  return %e : $MultiPayloadClassGeneric<C>
}

enum MultiPayloadAddressOnlyFixed {
  case X(Any)
  case Y(Builtin.Int32)
}

// CHECK-LABEL: define{{( protected)?}} swiftcc void @multi_payload_address_only_destroy(%T4enum28MultiPayloadAddressOnlyFixedO* noalias nocapture dereferenceable({{.*}}))
sil @multi_payload_address_only_destroy : $@convention(thin) (@in MultiPayloadAddressOnlyFixed) -> () {
entry(%m : $*MultiPayloadAddressOnlyFixed):
  destroy_addr %m : $*MultiPayloadAddressOnlyFixed
  return undef : $()
}

// Even if spare bits are available in an address-only payload,
// we cannot use them.

struct AddressOnlySpareBitsPayload {
  weak var x: C?
  var y: C
}

enum MultiPayloadAddressOnlySpareBits {
  case X(AddressOnlySpareBitsPayload)
  case Y(AddressOnlySpareBitsPayload)
}

// CHECK-LABEL: define{{( protected)?}} swiftcc void @multi_payload_address_only_spare_bits(%T4enum32MultiPayloadAddressOnlySpareBitsO* noalias nocapture dereferenceable({{.*}}))
sil @multi_payload_address_only_spare_bits : $@convention(thin) (@in MultiPayloadAddressOnlySpareBits) -> () {
entry(%m : $*MultiPayloadAddressOnlySpareBits):
  destroy_addr %m : $*MultiPayloadAddressOnlySpareBits
  return undef : $()
}

// Force the storage types to all be generated.
typealias AllConcreteTestEnums = (
  Empty,
  EmptySingleton,
  Singleton,
  SingletonRef,
  NoPayloads,
  NoPayloads2,
  SinglePayloadNoXI,
  SinglePayloadNoXI2,
  SinglePayloadSpareBit,
  SinglePayloadNested,
  SinglePayloadNestedNested,
  MultiPayloadNoSpareBits,
  MultiPayloadOneSpareBit,
  MultiPayloadTwoSpareBits,
  MultiPayloadSpareBitAggregates,
  MultiPayloadNested,
  MultiPayloadNestedSpareBits)

sil_global @x : $AllConcreteTestEnums

// CHECK: define{{( protected)?}} swiftcc void @dynamic_singleton_switch_indirect([[DYNAMIC_SINGLETON]]* noalias nocapture, %swift.type* %T) {{.*}} {
// CHECK:   bitcast [[DYNAMIC_SINGLETON]]* %0 to %swift.opaque*
// CHECK:   ret void
// CHECK: }
sil @dynamic_singleton_switch_indirect : $<T> (@in DynamicSingleton<T>) -> () {
entry(%0 : $*DynamicSingleton<T>):
  switch_enum_addr %0 : $*DynamicSingleton<T>, case #DynamicSingleton.value!enumelt.1: dest

dest:
  %1 = unchecked_take_enum_data_addr %0 : $*DynamicSingleton<T>, #DynamicSingleton.value!enumelt.1
  %v = tuple ()
  return %v : $()
}

// Verify that we can instantiate generic enum instances of dynamic size.
sil_global @aa : $DynamicSingleton<()>
sil_global @bb : $DynamicSingleton<NoPayloads>

// CHECK: define{{( protected)?}} swiftcc void @dynamic_singleton_instance_arg_1()
sil @dynamic_singleton_instance_arg_1 : $(DynamicSingleton<()>) -> () {
entry(%0 : $DynamicSingleton<()>):
  %v = tuple ()
  return %v : $()
}
// CHECK: define{{( protected)?}} swiftcc void @dynamic_singleton_instance_arg_2(i8)
sil @dynamic_singleton_instance_arg_2 : $(DynamicSingleton<NoPayloads>) -> () {
entry(%0 : $DynamicSingleton<NoPayloads>):
  %v = tuple ()
  return %v : $()
}

// Check that payloads get properly masked in nested single-payload enums.
// rdar://problem/18841262
// CHECK-64-LABEL: define{{( protected)?}} swiftcc i1 @optional_optional_class_protocol(i64, i64)
// CHECK-64:         icmp eq i64 %0, 2
// CHECK-32-LABEL: define{{( protected)?}} swiftcc i1 @optional_optional_class_protocol(i32, i32)
// CHECK-32:         icmp eq i32 %0, 1
enum Optionable<T> {
  case some(T), none
}
sil @optional_optional_class_protocol : $@convention(thin) Optionable<Optionable<PC>> -> Builtin.Int1 {
entry(%o : $Optionable<Optionable<PC>>):
  %t = integer_literal $Builtin.Int1, 1
  %f = integer_literal $Builtin.Int1, 0
  %r = select_enum %o : $Optionable<Optionable<PC>>, case #Optionable.some!enumelt.1: %t, case #Optionable.none!enumelt: %f : $Builtin.Int1
  return %r : $Builtin.Int1
}

struct ContainsUnowned {
  unowned let x: C
}
struct ContainsUnownedObjC {
  unowned let x: C
}
// CHECK-LABEL: define {{.*}} @optional_unowned() {{.*}} {
// CHECK-objc-64:     ret { [[WORD]], [[WORD]], i8 } { [[WORD]] 0, [[WORD]] 0, i8 1 }
// CHECK-native-64:   ret { [[WORD]], [[WORD]] } { [[WORD]] 0, [[WORD]] 2 }
// CHECK-objc-32:     ret { [[WORD]], [[WORD]], i8 } { [[WORD]] 0, [[WORD]] 0, i8 1 }
// CHECK-native-32:   ret { [[WORD]], [[WORD]] } { [[WORD]] 0, [[WORD]] 1 }
sil @optional_unowned : $@convention(thin) () -> (Optionable<ContainsUnowned>, Optionable<Optionable<ContainsUnowned>>) {
entry:
  %a = enum $Optionable<ContainsUnowned>, #Optionable.none!enumelt
  %b = enum $Optionable<Optionable<ContainsUnowned>>, #Optionable.none!enumelt
  %t = tuple (%a : $Optionable<ContainsUnowned>, %b : $Optionable<Optionable<ContainsUnowned>>)
  return %t : $(Optionable<ContainsUnowned>, Optionable<Optionable<ContainsUnowned>>)
}
// CHECK-LABEL: define {{.*}} @optional_unowned_objc() {{.*}} {
// CHECK-objc-64:      ret { [[WORD]], [[WORD]], i8 } { [[WORD]] 0, [[WORD]] 0, i8 1 }
// CHECK-native-64:    ret { [[WORD]], [[WORD]] } { [[WORD]] 0, [[WORD]] 2 }
// CHECK-objc-32:      ret { [[WORD]], [[WORD]], i8 } { [[WORD]] 0, [[WORD]] 0, i8 1 }
// CHECK-native-32:    ret { [[WORD]], [[WORD]] } { [[WORD]] 0, [[WORD]] 1 }
sil @optional_unowned_objc : $@convention(thin) () -> (Optionable<ContainsUnownedObjC>, Optionable<Optionable<ContainsUnownedObjC>>) {
entry:
  %a = enum $Optionable<ContainsUnownedObjC>, #Optionable.none!enumelt
  %b = enum $Optionable<Optionable<ContainsUnownedObjC>>, #Optionable.none!enumelt
  %t = tuple (%a : $Optionable<ContainsUnownedObjC>, %b : $Optionable<Optionable<ContainsUnownedObjC>>)
  return %t : $(Optionable<ContainsUnownedObjC>, Optionable<Optionable<ContainsUnownedObjC>>)
}

// CHECK-64-LABEL: define{{( protected)?}} swiftcc { i64, i8 } @empty_payload_enum_in_enum(i32)
sil @empty_payload_enum_in_enum : $@convention(thin) (Int32) -> Optional<(Optional<()>, Int32)> {
entry(%x : $Int32):
  %a = tuple ()
  %b = enum $Optional<()>, #Optional.some!enumelt.1, %a : $()
  %c = tuple (%b : $Optional<()>, %x : $Int32)
  // CHECK-64: [[INT_ZEXT:%.*]] = zext i32 %0 to i64
  // CHECK-64: [[INT_SHL:%.*]] = shl i64 [[INT_ZEXT]], 32
  // CHECK-64: [[COMBINE:%.*]] = or i64 0, [[INT_SHL]]
  %d = enum $Optional<(Optional<()>, Int32)>, #Optional.some!enumelt.1, %c : $(Optional<()>, Int32)
  // CHECK-64: [[BIT:%.*]] = trunc i64 [[COMBINE]] to i1
  // CHECK-64: [[INT_SHR:%.*]] = lshr i64 [[COMBINE]], 32
  // CHECK-64: [[INT:%.*]] = trunc i64 [[INT_SHR]] to i32
  %e = unchecked_enum_data %d : $Optional<(Optional<()>, Int32)>, #Optional.some!enumelt.1
  return %d : $Optional<(Optional<()>, Int32)>
}

sil @optional_float80 : $@convention(thin) Float80 -> () {
entry(%x : $Float80):
  %y = enum $Optional<Float80>, #Optional.some!enumelt.1, %x : $Float80
  return undef : $()
}

// rdar://problem/21126703

protocol delegateProtocol : AnyObject { }

struct StructWithWeakVar {
weak var delegate: delegateProtocol?
}

// CHECK-64-LABEL: define{{( protected)?}} swiftcc void @weak_optional(%T4enum17StructWithWeakVarVSg* noalias nocapture dereferenceable({{.*}}))
sil @weak_optional : $@convention(thin) (@in StructWithWeakVar?) -> () {
entry(%x : $*StructWithWeakVar?):
  // CHECK-64:      icmp eq [[WORD]] {{%.*}}, 0
  // CHECK-64-NEXT: icmp eq [[WORD]] {{%.*}}, 1
  switch_enum_addr %x : $*StructWithWeakVar?,
    case #Optional.some!enumelt.1: a,
    case #Optional.none!enumelt:   b
a:
  br x
b:
  // CHECK-64:      store [[WORD]] 0
  // CHECK-64:      store [[WORD]] 1
  inject_enum_addr %x : $*StructWithWeakVar?, #Optional.none!enumelt
  br x

x:
  return undef : $()
}

public struct AnyError : Swift.Error { }

public enum Result<T, Error: Swift.Error> {
	case success(T)
	case failure(Error)
}

// CHECK-LABEL: define{{( protected)?}} swiftcc void @test_inject_enum_addr_with_bound_generic
sil @test_inject_enum_addr_with_bound_generic : $@convention(thin) <T> () -> @out Result<T, AnyError> {
bb0(%0 : $*Result<T, AnyError>):
// CHECK: call {{.*}} @_T04enum6ResultOMa
// CHECK: call void @swift_storeEnumTagMultiPayload
  inject_enum_addr %0 : $*Result<T, AnyError>, #Result.success!enumelt.1
  %r = tuple ()
// CHECK:  ret void
  return %r : $()
}

// CHECK-LABEL: define{{( protected)?}} swiftcc void @force_global_variables_to_materialize
sil @force_global_variables_to_materialize : $() -> () {
entry:
  // Force the global variables to materialize.
  %x = global_addr @x : $*AllConcreteTestEnums
  %y = load %x : $*AllConcreteTestEnums
  %a = global_addr @aa : $*DynamicSingleton<()>
  %q = load %a : $*DynamicSingleton<()>
  %b = global_addr @bb : $*DynamicSingleton<NoPayloads>
  %r = load %b : $*DynamicSingleton<NoPayloads>
  %z = tuple ()
// CHECK:  ret void
  return %z : $()
}

enum Target {
  case Public
  case Friends
  case SomeFriends([UInt])
}

// Ensure that we generate IR that does not run into verification
// issues for the case where there is a single tag bit and extra
// inhabitants.
// CHECK-LABEL: define{{( protected)?}} swiftcc void @generate_conditional_branch
sil @generate_conditional_branch : $@convention(thin) (@owned Target) -> () {
bb0(%0 : $Target):
  debug_value %0 : $Target
  retain_value %0 : $Target
  switch_enum %0 : $Target, case #Target.Public!enumelt: bb1, default bb2

bb1:
  br bb4

bb2:
  br bb3

bb3:
  release_value %0 : $Target
  br bb4

bb4:
  release_value %0 : $Target
  %9 = tuple ()
// CHECK: ret void
  return %9 : $()
}

// -- Fill function for dynamic singleton. The value witness table flags just
//    get copied over from the element.
// CHECK: define{{( protected)?}} private %swift.type* @create_generic_metadata_DynamicSingleton(%swift.type_pattern*, i8**) {{.*}} {
// CHECK:   [[T0:%.*]] = bitcast i8** %1 to %swift.type**
// CHECK:   [[T:%T]] = load %swift.type*, %swift.type** [[T0]],
// CHECK:   [[METADATA:%.*]] = call %swift.type* @swift_allocateGenericValueMetadata(%swift.type_pattern* %0, i8** %1)
// CHECK:   [[METADATA_ARRAY:%.*]] = bitcast %swift.type* [[METADATA]] to i8**
// CHECK:   [[T1:%.*]] = getelementptr inbounds i8*, i8** [[METADATA_ARRAY]], i32 3
// CHECK:   [[T0:%.*]] = bitcast %swift.type* [[T]] to i8*
// CHECK:   store i8* [[T0]], i8** [[T1]]
// CHECK:   [[VWT:%.*]] = getelementptr inbounds i8*, i8** [[METADATA_ARRAY]], i32 5
// CHECK:   [[T0:%.*]] = bitcast i8** [[VWT]] to i8*
// CHECK:   [[T1:%.*]] = getelementptr inbounds i8*, i8** [[METADATA_ARRAY]], i32 -1
// CHECK:   store i8* [[T0]], i8** [[T1]]
// CHECK:   [[T_VWTS:%.*]] = bitcast %swift.type* [[T]] to i8***
// CHECK:   [[T_VWT_ADDR:%.*]] = getelementptr inbounds i8**, i8*** [[T_VWTS]], [[WORD]] -1
// CHECK:   [[T_VWT:%.*]] = load i8**, i8*** [[T_VWT_ADDR]]
// CHECK:   [[T_LAYOUT:%.*]] = getelementptr inbounds i8*, i8** [[T_VWT]], i32 17
// CHECK:   [[SIZE_ADDR:%.*]] = getelementptr inbounds i8*, i8** [[VWT]], i32 17
// CHECK:   [[T_SIZE_ADDR:%.*]] = getelementptr inbounds i8*, i8** [[T_LAYOUT]], i32 0
// CHECK:   [[T_SIZE:%.*]] = load i8*, i8** [[T_SIZE_ADDR]]
// CHECK:   store i8* [[T_SIZE]], i8** [[SIZE_ADDR]]
// CHECK:   [[STRIDE_ADDR:%.*]] = getelementptr inbounds i8*, i8** [[VWT]], i32 19
// CHECK:   [[T_STRIDE_ADDR:%.*]] = getelementptr inbounds i8*, i8** [[T_LAYOUT]], i32 2
// CHECK:   [[T_STRIDE:%.*]] = load i8*, i8** [[T_STRIDE_ADDR]]
// CHECK:   store i8* [[T_STRIDE]], i8** [[STRIDE_ADDR]]
// CHECK:   [[FLAGS_ADDR:%.*]] = getelementptr inbounds i8*, i8** [[VWT]], i32 18
// CHECK:   [[T_FLAGS_ADDR:%.*]] = getelementptr inbounds i8*, i8** [[T_LAYOUT]], i32 1
// CHECK:   [[T_FLAGS:%.*]] = load i8*, i8** [[T_FLAGS_ADDR]]
// CHECK:   [[T_FLAGS_INT:%.*]] = ptrtoint i8* [[T_FLAGS]] to [[WORD]]
// CHECK:   [[T_FLAGS_INT_2:%.*]] = or [[WORD]] [[T_FLAGS_INT]], 2097152
// CHECK:   [[T_FLAGS_2:%.*]] = inttoptr [[WORD]] [[T_FLAGS_INT_2]] to i8*
// CHECK:   store i8* [[T_FLAGS_2]], i8** [[FLAGS_ADDR]]
// -- Test the 'has extra inhabitants' bit and carry over the extra inhabitants
//    flag if set.
// CHECK:   [[T_FLAGS_VAL:%.*]] = ptrtoint i8* [[T_FLAGS]] to [[WORD]]
// CHECK:   [[XI_FLAG:%.*]] = and [[WORD]] [[T_FLAGS_VAL]], 262144
// CHECK:   [[XI_BIT:%.*]] = icmp ne [[WORD]] [[XI_FLAG]], 0
// CHECK:   br i1 [[XI_BIT]], label %[[HAS_XI:[0-9]+]], label %[[HAS_NO_XI:[0-9]+]]
// CHECK: ; <label>:[[HAS_XI]]
// CHECK:   [[XI_FLAGS_ADDR:%.*]] = getelementptr inbounds i8*, i8** [[VWT]], i32 20
// CHECK:   [[T_XI_FLAGS_ADDR:%.*]] = getelementptr inbounds i8*, i8** [[T_LAYOUT]], i32 3
// CHECK:   [[T_XI_FLAGS:%.*]] = load i8*, i8** [[T_XI_FLAGS_ADDR]]
// CHECK:   store i8* [[T_XI_FLAGS]], i8** [[XI_FLAGS_ADDR]]
// CHECK:   br label %[[HAS_NO_XI]]
// CHECK: ; <label>:[[HAS_NO_XI]]
// CHECK:   ret %swift.type* [[METADATA]]

// -- Fill function for dynamic single-payload. Call into the runtime to
//    calculate the size.
// CHECK-LABEL: define{{( protected)?}} private %swift.type* @create_generic_metadata_DynamicSinglePayload(%swift.type_pattern*, i8**) {{.*}} {
// CHECK:   call void @swift_initEnumValueWitnessTableSinglePayload

// CHECK-64-LABEL: define linkonce_odr hidden void @_T04enum17StructWithWeakVarVwxs(%swift.opaque* %dest, i32 %index, %swift.type* %StructWithWeakVar)
// -- TODO: some pointless masking here.
// -- TODO: should use EnumPayload word-chunking.
// CHECK-64:         %1 = zext i32 %index to i128
// --                             0xFFFF_FFFF_FFFF_FFFF
// CHECK-64:         %2 = and i128 %1, 18446744073709551615
// CHECK-64:         %3 = shl i128 %1, 3
// --                             0xFFFF_FFFF_FFFF_FFF8__0000_0000_0000_0000
// CHECK-64:         %4 = and i128 %3, 1329227995784915725329854470603931648
// CHECK-64:         %5 = or i128 %2, %4
// --                             0x1__0000_0000_0000_0000
// CHECK-64:         %6 = or i128 %5, 18446744073709551616

// CHECK-LABEL: define linkonce_odr hidden i32 @_T04enum40MultiPayloadLessThan32BitsWithEmptyCasesOwug(%swift.opaque* %value
// CHECK:  [[VAL00:%.*]] = bitcast %swift.opaque* %value to %T4enum40MultiPayloadLessThan32BitsWithEmptyCasesO*
// CHECK:  [[VAL01:%.*]] = bitcast %T4enum40MultiPayloadLessThan32BitsWithEmptyCasesO* [[VAL00]] to i8*
// CHECK:  [[VAL02:%.*]] = load {{.*}} [[VAL01]]
// CHECK:  [[VAL03:%.*]] = getelementptr inbounds {{.*}} [[VAL00]], i32 0, i32 1
// CHECK:  [[VAL04:%.*]] = bitcast {{.*}} [[VAL03]] to i8*
// CHECK:  [[VAL05:%.*]] = load {{.*}} [[VAL04]]
// CHECK:  [[VAL06:%.*]] = zext i8 [[VAL05]] to i32
// CHECK:  [[VAL07:%.*]] = sub i32 [[VAL06]], 2
// CHECK:  [[VAL08:%.*]] = zext i8 [[VAL02]] to i32
// CHECK:  [[VAL09:%.*]] = and i32 [[VAL08]], 255
// CHECK:  [[VAL10:%.*]] = icmp sge i32 [[VAL07]], 0
// CHECK:  [[VAL11:%.*]] = select i1 [[VAL10]], i32 [[VAL09]], i32 [[VAL07]]
// CHECK:  ret i32 [[VAL11]]

// CHECK-LABEL: define linkonce_odr hidden void @_T04enum40MultiPayloadLessThan32BitsWithEmptyCasesOwui(%swift.opaque* %value, i32 %tag
// CHECK: entry:
// CHECK:  [[VAL00:%.*]] = bitcast %swift.opaque* %value
// CHECK:  [[VAL01:%.*]] = icmp sge i32 %tag, 0
// CHECK:  br i1 [[VAL01]], label %[[TLABEL:.*]], label %[[FLABEL:.*]]

// CHECK: <label>:[[TLABEL]]
// CHECK:  [[VAL03:%.*]] = trunc i32 %tag to i8
// CHECK:  [[VAL04:%.*]] = bitcast %T4enum40MultiPayloadLessThan32BitsWithEmptyCasesO* [[VAL00]] to i8*
// CHECK:  store i8 [[VAL03]], i8* [[VAL04]]
// CHECK:  [[VAL05:%.*]] = getelementptr inbounds {{.*}} [[VAL00]], i32 0, i32 1
// CHECK:  [[VAL06:%.*]] = bitcast [1 x i8]* [[VAL05]] to i8*
// CHECK:  store i8 2, i8* [[VAL06]]
// CHECK:  br label %[[RLABEL:.*]]

// CHECK: <label>:[[FLABEL]]
// CHECK:  [[VAL08:%.*]] = add i32 %tag, 2
// CHECK:  [[VAL09:%.*]] = trunc i32 [[VAL08]] to i8
// CHECK:  [[VAL10:%.*]] = getelementptr inbounds {{.*}} [[VAL00]], i32 0, i32 1
// CHECK:  [[VAL11:%.*]] = bitcast [1 x i8]* [[VAL10]] to i8*
// CHECK:  store i8 [[VAL09]], i8* [[VAL11]]
// CHECK:  br label %[[RLABEL]]

// CHECK: <label>:[[RLABEL]]
// CHECK:  ret void

enum MultiPayloadLessThan32BitsWithEmptyCases {
  case A
  case B
  case C(Builtin.Int8)
  case D(Builtin.Int8)
}