// RUN: %target-sil-opt -enable-sil-verify-all %s -late-codemotion -release-hoisting -retain-sinking | %FileCheck %s

import Builtin
import Swift

class B { }
class E : B { }

struct A {
  var i : Builtin.Int32
}

enum FakeOptional<T> {
  case none
  case some(T)
}


class C {}

class C2  {
 var current: A
 init()
}

enum Either {
  case First(Builtin.NativeObject)
  case Second(C)
}

enum ThreeCaseEnum {
  case A
  case B
  case C
}

struct S {
  var ptr : Builtin.NativeObject
}

enum ThreeCaseAbstractionDifference {
  case A(Builtin.Int32)
  case B(Builtin.NativeObject)
  case C(S)
}

class X {}

sil @user : $@convention(thin) (Builtin.NativeObject) -> ()
sil @use_C2 : $@convention(thin) (C2) -> ()
sil @optional_user : $@convention(thin) (FakeOptional<Builtin.Int32>) -> ()
sil @blocker : $@convention(thin) () -> ()
sil @get_object : $@convention(thin) () -> Builtin.NativeObject

// CHECK-LABEL: sil @sink_from_preds
// CHECK: bb1:
// CHECK-NEXT: br bb3
// CHECK: bb2:
// CHECK-NEXT: br bb3
// CHECK: bb3:
// CHECK: strong_retain
// CHECK: return
sil @sink_from_preds : $@convention(thin) (Builtin.Int1, B) -> () {
bb0(%0 : $Builtin.Int1, %1 : $B):
  cond_br %0, bb1, bb2

bb1:
  strong_retain %1 : $B
  br bb3

bb2:
  strong_retain %1 : $B
  br bb3

bb3:
  %4 = tuple()
  return %4 : $()
}

// CHECK-LABEL: sil @sink_from_preds_through_args
// CHECK: bb1:
// CHECK-NEXT: br bb3
// CHECK: bb2:
// CHECK-NEXT: br bb3
// CHECK: bb3([[A:%[0-9]+]] : $B):
// CHECK: strong_retain [[A]]
// CHECK: return
sil @sink_from_preds_through_args : $@convention(thin) (Builtin.Int1, B, B) -> () {
bb0(%0 : $Builtin.Int1, %1 : $B, %2 : $B):
  cond_br %0, bb1, bb2

bb1:
  strong_retain %1 : $B
  br bb3(%1 : $B)

bb2:
  strong_retain %2 : $B
  br bb3(%2 : $B)

bb3(%a1 : $B):
  %t1 = tuple()
  return %t1 : $()
}

// CHECK-LABEL: sil @sink_from_preds_not_through_args
// CHECK: bb1:
// CHECK-NEXT: br bb3
// CHECK: bb2:
// CHECK-NEXT: br bb3
// CHECK: bb3({{%[0-9]+}} : $B):
// CHECK: strong_retain %1
// CHECK: return
sil @sink_from_preds_not_through_args : $@convention(thin) (Builtin.Int1, B, B) -> () {
bb0(%0 : $Builtin.Int1, %1 : $B, %2 : $B):
  cond_br %0, bb1, bb2

bb1:
  strong_retain %1 : $B
  br bb3(%1 : $B)

bb2:
  strong_retain %1 : $B
  br bb3(%2 : $B)

bb3(%a1 : $B):
  %t1 = tuple()
  return %t1 : $()
}

// CHECK-LABEL: sil @sink_from_preds_through_args2
// CHECK: bb1:
// CHECK-NEXT: br bb3
// CHECK: bb2:
// CHECK-NEXT: br bb3
// CHECK: bb3({{%[0-9]+}} : $B, [[A:%[0-9]+]] : $B):
// CHECK: strong_retain [[A]]
// CHECK: return
sil @sink_from_preds_through_args2 : $@convention(thin) (Builtin.Int1, B, B, B) -> () {
bb0(%0 : $Builtin.Int1, %1 : $B, %2 : $B, %3 : $B):
  cond_br %0, bb1, bb2

bb1:
  strong_retain %1 : $B
  br bb3(%3 : $B, %1 : $B)

bb2:
  strong_retain %2 : $B
  br bb3(%3 : $B, %2 : $B)

bb3(%a1 : $B, %a2 : $B):
  %t1 = tuple()
  return %t1 : $()
}

// CHECK-LABEL: sil @do_not_sink_from_preds_through_args
// CHECK: bb1:
// CHECK-NEXT: strong_retain
// CHECK-NEXT: br bb3
// CHECK: bb2:
// CHECK-NEXT: strong_retain
// CHECK-NEXT: br bb3
// CHECK-NOT: strong_retain
// CHECK: return
sil @do_not_sink_from_preds_through_args : $@convention(thin) (Builtin.Int1, B, B, B) -> () {
bb0(%0 : $Builtin.Int1, %1 : $B, %2 : $B, %3 : $B):
  cond_br %0, bb1, bb2

bb1:
  strong_retain %1 : $B
  br bb3(%1 : $B)

bb2:
  strong_retain %2 : $B
  br bb3(%3 : $B)

bb3(%a1 : $B):
  %t1 = tuple()
  return %t1 : $()
}

// CHECK-LABEL: sil @do_not_sink_from_preds_through_args2
// CHECK: bb1:
// CHECK-NEXT: strong_retain
// CHECK-NEXT: br bb3
// CHECK: bb2:
// CHECK-NEXT: strong_retain
// CHECK-NEXT: br bb3
// CHECK-NOT: strong_retain
// CHECK: return
sil @do_not_sink_from_preds_through_args2 : $@convention(thin) (Builtin.Int1, B, B, B) -> () {
bb0(%0 : $Builtin.Int1, %1 : $B, %2 : $B, %3 : $B):
  cond_br %0, bb1, bb2

bb1:
  strong_retain %1 : $B
  br bb3(%1 : $B, %3 : $B)

bb2:
  strong_retain %2 : $B
  br bb3(%3 : $B, %2 : $B)

bb3(%a1 : $B, %a2 : $B):
  %t1 = tuple()
  return %t1 : $()
}

// CHECK-LABEL: sil @do_not_sink_from_preds_through_args3
// CHECK: bb2:
// CHECK-NEXT: strong_retain
// CHECK-NEXT: br bb5
// CHECK: bb3:
// CHECK-NEXT: strong_retain
// CHECK-NEXT: br bb5
// CHECK: bb4:
// CHECK-NEXT: strong_retain
// CHECK-NEXT: br bb5
// CHECK-NOT: strong_retain
// CHECK: return
sil @do_not_sink_from_preds_through_args3 : $@convention(thin) (Builtin.Int1, B, B) -> () {
bb0(%0 : $Builtin.Int1, %1 : $B, %2 : $B):
  cond_br %0, bb1, bb2

bb1:
  cond_br %0, bb3, bb4

bb2:
  strong_retain %1 : $B
  br bb5(%1 : $B)

bb3:
  strong_retain %2 : $B
  br bb5(%2 : $B)

bb4:
  strong_retain %1 : $B
  br bb5(%2 : $B)

bb5(%a1 : $B):
  %t1 = tuple()
  return %t1 : $()
}

// CHECK-LABEL: sil @do_not_sink_from_preds_through_args4
// CHECK: bb2:
// CHECK-NEXT: strong_retain
// CHECK-NEXT: br bb5
// CHECK: bb3:
// CHECK-NEXT: strong_retain
// CHECK-NEXT: br bb5
// CHECK: bb4:
// CHECK-NEXT: strong_retain
// CHECK-NEXT: br bb5
// CHECK-NOT: strong_retain
// CHECK: return
sil @do_not_sink_from_preds_through_args4 : $@convention(thin) (Builtin.Int1, B, B) -> () {
bb0(%0 : $Builtin.Int1, %1 : $B, %2 : $B):
  cond_br %0, bb1, bb2

bb1:
  cond_br %0, bb3, bb4

bb2:
  strong_retain %1 : $B
  br bb5(%2 : $B)

bb3:
  strong_retain %2 : $B
  br bb5(%2 : $B)

bb4:
  strong_retain %1 : $B
  br bb5(%1 : $B)

bb5(%a1 : $B):
  %t1 = tuple()
  return %t1 : $()
}

// CHECK-LABEL: sil @do_not_sink_local_uses
// CHECK: integer_literal
// CHECK: integer_literal
// CHECK: return
sil @do_not_sink_local_uses : $@convention(thin) (Builtin.Int1) -> Builtin.Int32 {
bb0(%0 : $Builtin.Int1):
  cond_br %0, bb1, bb3

bb1:
  %1 = integer_literal $Builtin.Int32, 7
  br bb2(%1 : $Builtin.Int32)

bb3:
  %2 = integer_literal $Builtin.Int32, 8
  br bb2(%2 : $Builtin.Int32)

bb2(%3 : $Builtin.Int32):
  return %3 : $Builtin.Int32
}

// CHECK-LABEL: sil @deep_sink1
// CHECK: integer_literal
// CHECK: br bb3
// CHECK: integer_literal
// CHECK: br bb3
// CHECK: bb3
// CHECK: strong_retain
// CHECK-NEXT: return
sil @deep_sink1 : $@convention(thin) (Builtin.Int1, B) -> Builtin.Int32 {
bb0(%0 : $Builtin.Int1, %1 : $B):
  cond_br %0, bb1, bb2

bb1:
  strong_retain %1 : $B
  %3 = integer_literal $Builtin.Int32, 9
  br bb3(%3 : $Builtin.Int32)

bb2:
  strong_retain %1 : $B
  %5 = integer_literal $Builtin.Int32, 7
  br bb3(%5 : $Builtin.Int32)

bb3(%6 : $Builtin.Int32):
  return %6 : $Builtin.Int32
}

// CHECK-LABEL: sil @deep_sink2
// CHECK-NOT: integer_literal
// CHECK: br bb3
// CHECK-NOT: integer_literal
// CHECK: br bb3
// CHECK: bb3
// CHECK: integer_literal
// CHECK: strong_retain
// CHECK-NEXT: return
sil @deep_sink2 : $@convention(thin) (Builtin.Int1, B) -> Builtin.Int32 {
bb0(%0 : $Builtin.Int1, %1 : $B):
  cond_br %0, bb1, bb2

bb1:
  strong_retain %1 : $B
  %3 = integer_literal $Builtin.Int32, 7
  br bb3(%3 : $Builtin.Int32)

bb2:
  strong_retain %1 : $B
  %5 = integer_literal $Builtin.Int32, 7
  br bb3(%5 : $Builtin.Int32)

bb3(%6 : $Builtin.Int32):
  return %6 : $Builtin.Int32
}

// CHECK-LABEL: sil @sink_ref_count_ops_enum_over_switch_enum_1 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
// CHECK: bb0({{.*}}):
// CHECK-NEXT: function_ref blocker
// CHECK-NEXT: function_ref @blocker
// CHECK-NEXT: retain_value
// CHECK-NEXT: apply
// CHECK-NEXT: alloc_stack
// CHECK-NEXT: dealloc_stack
// CHECK-NEXT: switch_enum
// CHECK: bb1({{.*}}):
// CHECK: strong_retain
// CHECK: apply
// CHECK: bb2:
// CHECK-NOT: unchecked_enum_data
// CHECK-NOT: retain_value
// CHECK-NOT: strong_retain
// CHECK: bb3:
// CHECK-NOT: retain_value
// CHECK-NOT: strong_retain
// CHECK-LABEL: } // end sil function 'sink_ref_count_ops_enum_over_switch_enum_1'
sil @sink_ref_count_ops_enum_over_switch_enum_1 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
bb0(%0 : $FakeOptional<Builtin.NativeObject>):
  %1 = function_ref @blocker : $@convention(thin) () -> ()
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  apply %1() : $@convention(thin) () -> ()
  %3 = alloc_stack $Builtin.Int32
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  dealloc_stack %3 : $*Builtin.Int32
  switch_enum %0 : $FakeOptional<Builtin.NativeObject>, case #FakeOptional.some!enumelt.1: bb1, case #FakeOptional.none!enumelt: bb2

bb1(%2 : $Builtin.NativeObject):
  apply %1() : $@convention(thin) () -> ()
  br bb3

bb2:
  br bb3

bb3:
  %4 = tuple()
  return %4 : $()
}

// This test makes sure that we do move ref counts over instructions that cannot reference it.
// CHECK-LABEL: sil @sink_ref_count_ops_enum_over_switch_enum_4 :
// CHECK: bb0({{%[0-9]+}} : $FakeOptional<Builtin.NativeObject>, [[ARG1:%[0-9]+]] : $FakeOptional<Builtin.NativeObject>):
// CHECK-NOT: retain_value [[ARG1]]
// CHECK: switch_enum
// CHECK: bb1:
// CHECK: retain_value
// CHECK: bb2:
// CHECK-NOT: unchecked_enum_data
// CHECK-NOT: retain_value [[ARG1]]
// CHECK-NOT: strong_retain
// CHECK: bb3:
// CHECK-NOT: unchecked_enum_data
// CHECK-NOT: retain_value [[ARG1]]
// CHECK-NOT: strong_retain
sil @sink_ref_count_ops_enum_over_switch_enum_4 : $@convention(thin) (FakeOptional<Builtin.NativeObject>, FakeOptional<Builtin.NativeObject>) -> FakeOptional<Builtin.NativeObject> {
bb0(%0 : $FakeOptional<Builtin.NativeObject>, %1 : $FakeOptional<Builtin.NativeObject>):
  %2 = function_ref @blocker : $@convention(thin) () -> ()
  retain_value %1 : $FakeOptional<Builtin.NativeObject>
  %3 = alloc_stack $FakeOptional<Builtin.Int32>
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  switch_enum %1 : $FakeOptional<Builtin.NativeObject>, case #FakeOptional.some!enumelt.1: bb1, case #FakeOptional.none!enumelt: bb2

bb1:
  apply %2() : $@convention(thin) () -> ()
  br bb3

bb2:
  br bb3

bb3:
  dealloc_stack %3 : $*FakeOptional<Builtin.Int32>
  return %1 : $FakeOptional<Builtin.NativeObject>
}

/// This version does not work since we have a release before the terminator
/// even though we have the select_enum before it.
// CHECK-LABEL: sil @sink_ref_count_ops_enum_over_switch_enum_5 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
// CHECK: bb0({{.*}}):
// CHECK: bb1:
// CHECK-NEXT: function_ref blocker
// CHECK-NEXT: function_ref @blocker
// CHECK-NEXT: alloc_stack
// CHECK-NEXT: dealloc_stack
// CHECK-NEXT: switch_enum
// CHECK: bb2:
// CHECK-NOT: retain_value
// CHECK: bb3:
// CHECK-NOT: retain_value
// CHECK: bb4:
// CHECK-NOT: retain_value
sil @sink_ref_count_ops_enum_over_switch_enum_5 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
bb0(%0 : $FakeOptional<Builtin.NativeObject>):
  br bb10

bb10:
  %1 = function_ref @blocker : $@convention(thin) () -> ()
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  %3 = alloc_stack $Builtin.Int32
  dealloc_stack %3 : $*Builtin.Int32
  release_value %0 : $FakeOptional<Builtin.NativeObject>
  switch_enum %0 : $FakeOptional<Builtin.NativeObject>, case #FakeOptional.some!enumelt.1: bb1, case #FakeOptional.none!enumelt: bb2

bb1:
  br bb3

bb2:
  br bb3

bb3:
  %4 = tuple()
  return %4 : $()
}

// CHECK-LABEL: sil @sink_ref_count_ops_enum_over_select_enum_1 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
// CHECK: bb0({{.*}}):
// CHECK-NEXT: integer_literal
// CHECK-NEXT: integer_literal
// CHECK-NEXT: function_ref blocker
// CHECK-NEXT: function_ref @blocker
// CHECK-NEXT: retain_value
// CHECK-NEXT: apply
// CHECK-NEXT: alloc_stack
// CHECK-NEXT: dealloc_stack
// CHECK-NEXT: select_enum
// CHECK-NEXT: cond_br
// CHECK: bb1:
// CHECK: strong_retain
// CHECK-NOT: retain_value
// CHECK: bb2:
// CHECK-NOT: unchecked_enum_data
// CHECK-NOT: retain_value
// CHECK-NOT: strong_retain
// CHECK: bb3:
// CHECK-NOT: retain_value
// CHECK-NOT: strong_retain
sil @sink_ref_count_ops_enum_over_select_enum_1 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
bb0(%0 : $FakeOptional<Builtin.NativeObject>):
  %t = integer_literal $Builtin.Int1, 1
  %f = integer_literal $Builtin.Int1, 0
  %1 = function_ref @blocker : $@convention(thin) () -> ()
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  apply %1() : $@convention(thin) () -> ()
  %3 = alloc_stack $Builtin.Int32
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  dealloc_stack %3 : $*Builtin.Int32
  %100 = select_enum %0 : $FakeOptional<Builtin.NativeObject>, case #FakeOptional.some!enumelt.1: %t, case #FakeOptional.none!enumelt: %f : $Builtin.Int1
  cond_br %100, bb1, bb2

bb1:
  apply %1() : $@convention(thin) () -> ()
  br bb3

bb2:
  br bb3

bb3:
  %4 = tuple()
  return %4 : $()
}

// CHECK-LABEL: sil @sink_ref_count_ops_enum_over_select_enum_2 : $@convention(thin) (FakeOptional<Builtin.Int32>) -> () {
// CHECK: bb0({{.*}}):
// CHECK-NEXT: integer_literal
// CHECK-NEXT: integer_literal
// CHECK-NEXT: function_ref blocker
// CHECK-NEXT: function_ref @blocker
// CHECK-NEXT: cond_br
// CHECK: bb1:
// CHECK-NEXT: br bb4
// CHECK: bb2:
// CHECK-NEXT: select_enum
// CHECK-NEXT: cond_br
// CHECK-NOT: unchecked_enum_data
// CHECK-NOT: retain_value
// CHECK-LABEL: } // end sil function 'sink_ref_count_ops_enum_over_select_enum_2'
sil @sink_ref_count_ops_enum_over_select_enum_2 : $@convention(thin) (FakeOptional<Builtin.Int32>) -> () {
bb0(%0 : $FakeOptional<Builtin.Int32>):
  %t = integer_literal $Builtin.Int1, 1
  %f = integer_literal $Builtin.Int1, 0
  %1 = function_ref @blocker : $@convention(thin) () -> ()
  cond_br undef, bb1, bb2

bb1:
  retain_value %0 : $FakeOptional<Builtin.Int32>
  %100 = select_enum %0 : $FakeOptional<Builtin.Int32>, case #FakeOptional.some!enumelt.1: %t, case #FakeOptional.none!enumelt: %f : $Builtin.Int1
  cond_br %100, bb2, bb3

bb2:
  br bb4

bb3:
  br bb4

bb4:
  %2 = tuple()
  return %2 : $()
}

// CHECK-LABEL: sil @sink_ref_count_ops_enum_over_select_enum_3 : $@convention(thin) (FakeOptional<Builtin.Int32>) -> () {
// CHECK: bb0({{.*}}):
// CHECK-NEXT: integer_literal
// CHECK-NEXT: integer_literal
// CHECK-NEXT: function_ref blocker
// CHECK-NEXT: function_ref @blocker
// CHECK-NEXT: cond_br
// CHECK: bb1:
// CHECK-NEXT: br bb5
// CHECK: bb2:
// CHECK-NEXT: select_enum
// CHECK-NEXT: cond_br
// CHECK-NOT: unchecked_enum_data
// CHECK-NOT: retain_value
// CHECK-LABEL: } // end sil function 'sink_ref_count_ops_enum_over_select_enum_3'
sil @sink_ref_count_ops_enum_over_select_enum_3 : $@convention(thin) (FakeOptional<Builtin.Int32>) -> () {
bb0(%0 : $FakeOptional<Builtin.Int32>):
  %t = integer_literal $Builtin.Int1, 1
  %f = integer_literal $Builtin.Int1, 0
  %1 = function_ref @blocker : $@convention(thin) () -> ()
  cond_br undef, bb1, bb3

bb1:
  retain_value %0 : $FakeOptional<Builtin.Int32>
  %100 = select_enum %0 : $FakeOptional<Builtin.Int32>, case #FakeOptional.some!enumelt.1: %t, case #FakeOptional.none!enumelt: %f : $Builtin.Int1
  cond_br %100, bb2, bb3

bb2:
  br bb4

bb3:
  br bb4

bb4:
  %2 = tuple()
  return %2 : $()
}

// CHECK-LABEL: sil @sink_ref_count_ops_enum_over_select_enum_4 : $@convention(thin) (FakeOptional<Builtin.Int32>, FakeOptional<Builtin.NativeObject>) -> FakeOptional<Builtin.NativeObject> {
// CHECK: bb0({{%[0-9]+}} : $FakeOptional<Builtin.Int32>, [[ARG1:%[0-9]+]] : $FakeOptional<Builtin.NativeObject>):
// CHECK-NOT: retain_value [[ARG1]]
// CHECK: select_enum
// CHECK: cond_br
// CHECK: bb1:
// CHECK: strong_retain
// CHECK: bb2:
// CHECK-NOT: unchecked_enum_data
// CHECK-NOT: retain_value [[ARG1]]
// CHECK: bb3:
// CHECK-NOT: unchecked_enum_data
// CHECK-NOT: retain_value [[ARG1]]
sil @sink_ref_count_ops_enum_over_select_enum_4 : $@convention(thin) (FakeOptional<Builtin.Int32>, FakeOptional<Builtin.NativeObject>) -> FakeOptional<Builtin.NativeObject> {
bb0(%0 : $FakeOptional<Builtin.Int32>, %1 : $FakeOptional<Builtin.NativeObject>):
  %t = integer_literal $Builtin.Int1, 1
  %f = integer_literal $Builtin.Int1, 0
  %2 = function_ref @blocker : $@convention(thin) () -> ()
  retain_value %1 : $FakeOptional<Builtin.NativeObject>
  retain_value %0 : $FakeOptional<Builtin.Int32>
  %100 = select_enum %1 : $FakeOptional<Builtin.NativeObject>, case #FakeOptional.some!enumelt.1: %t, case #FakeOptional.none!enumelt: %f : $Builtin.Int1
  cond_br %100, bb1, bb2

bb1:
  apply %2() : $@convention(thin) () -> ()
  br bb3

bb2:
  br bb3

bb3:
  return %1 : $FakeOptional<Builtin.NativeObject>
}

/// This version does not work since we have a release before the terminator
/// even though we have the select_enum before it.
// CHECK-LABEL: sil @sink_ref_count_ops_enum_over_select_enum_5 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
// CHECK: bb0({{.*}}):
// CHECK: bb1:
// CHECK-NEXT: function_ref blocker
// CHECK-NEXT: function_ref @blocker
// CHECK-NEXT: alloc_stack
// CHECK-NEXT: dealloc_stack
// CHECK-NEXT: select_enum
// CHECK-NEXT: cond_br
// CHECK: bb2:
// CHECK-NOT: retain_value
// CHECK: bb3:
// CHECK-NOT: retain_value
// CHECK: bb4:
// CHECK-NOT: retain_value
sil @sink_ref_count_ops_enum_over_select_enum_5 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
bb0(%0 : $FakeOptional<Builtin.NativeObject>):
  %t = integer_literal $Builtin.Int1, 1
  %f = integer_literal $Builtin.Int1, 0
  br bb10

bb10:
  %1 = function_ref @blocker : $@convention(thin) () -> ()
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  %3 = alloc_stack $Builtin.Int32
  dealloc_stack %3 : $*Builtin.Int32
  %100 = select_enum %0 : $FakeOptional<Builtin.NativeObject>, case #FakeOptional.some!enumelt.1: %t, case #FakeOptional.none!enumelt: %f : $Builtin.Int1
  release_value %0 : $FakeOptional<Builtin.NativeObject>
  cond_br %100, bb1, bb2

bb1:
  br bb3

bb2:
  br bb3

bb3:
  %4 = tuple()
  return %4 : $()
}

// Sink the struct instruction
// CHECK-LABEL: sil @sink_struct : $@convention(thin) (FakeOptional<Builtin.Int32>) -> Bool {
// CHECK: bb0({{.*}}):
// CHECK: switch_enum
// CHECK: bb1:
// CHECK: integer_literal $Builtin.Int1, -1
// CHECK: br bb3({{.*}} : $Builtin.Int1)
// CHECK: bb2:
// CHECK: integer_literal $Builtin.Int1, 0
// CHECK: br bb3({{.*}} : $Builtin.Int1)
// CHECK: bb3({{.*}} : $Builtin.Int1):
// CHECK: struct $Bool
// CHECK: return
sil @sink_struct : $@convention(thin) (FakeOptional<Builtin.Int32>) -> Bool {
bb0(%0 : $FakeOptional<Builtin.Int32>):
  switch_enum %0 : $FakeOptional<Builtin.Int32>, case #FakeOptional.some!enumelt.1: bb1, case #FakeOptional.none!enumelt: bb2

bb1:
  %6 = integer_literal $Builtin.Int1, -1
  %7 = struct $Bool (%6 : $Builtin.Int1)
  br bb3(%7 : $Bool)

bb2:
  %9 = integer_literal $Builtin.Int1, 0
  %10 = struct $Bool (%9 : $Builtin.Int1)
  br bb3(%10 : $Bool)

bb3(%12 : $Bool):
  return %12 : $Bool
}

// Sink retain down the successors so we can pair up retain with release on the
// fast path.
class Test {
  func testing() -> UInt64
}
sil_global @test : $Test
sil_global @x    : $UInt64

// CHECK-LABEL: @sink_refcount_to_succs
sil @sink_refcount_to_succs : $@convention(thin) () -> () {
bb0:
  %0 = global_addr @test : $*Test
  %1 = alloc_ref $Test
  store %1 to %0 : $*Test
  %7 = global_addr @x : $*UInt64
  %8 = integer_literal $Builtin.Int64, 0
  %9 = struct $UInt64 (%8 : $Builtin.Int64)
  store %9 to %7 : $*UInt64
  br bb1
bb1:
// CHECK: bb1:
// CHECK-NOT: strong_retain
  %17 = load %0 : $*Test
  strong_retain %17 : $Test
  %19 = class_method %17 : $Test, #Test.testing!1 : (Test) -> () -> UInt64, $@convention(method) (@guaranteed Test) -> UInt64
  %20 = load %7 : $*UInt64
  checked_cast_br [exact] %17 : $Test to $Test, bb3, bb4
bb2:
// CHECK: bb2:
// CHECK-NOT: strong_retain
  %36 = tuple ()
  return %36 : $()
bb3(%38 : $Test):
// CHECK: bb3(
// CHECK: strong_retain
// CHECK: strong_release
  strong_release %17 : $Test
  br bb2
bb4:
// CHECK: bb4:
// CHECK: strong_retain
// CHECK: apply
  %65 = apply %19(%17) : $@convention(method) (@guaranteed Test) -> UInt64
  br bb2
}

sil @virtual_callee : $@convention(method) (@guaranteed Test) -> UInt64
sil_vtable Test {
  #Test.testing!1: @virtual_callee
}

sil @arc_user : $@convention(thin) () -> ()

// CHECK-LABEL: sil @enum_simplification_test1 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
// CHECK: bb0
// CHECK-NEXT: tuple
// CHECK-NEXT: return
sil @enum_simplification_test1 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
bb0(%0 : $FakeOptional<Builtin.NativeObject>):
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  release_value %0 : $FakeOptional<Builtin.NativeObject>
  %9999 = tuple()
  return %9999 : $()
}

// CHECK-LABEL: sil @enum_simplification_test2 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
// CHECK: bb0
// CHECK-NEXT: unchecked_enum_data
// CHECK-NEXT: tuple
// CHECK-NEXT: return
sil @enum_simplification_test2 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
bb0(%0 : $FakeOptional<Builtin.NativeObject>):
  %1 = unchecked_enum_data %0 : $FakeOptional<Builtin.NativeObject>, #FakeOptional.some!enumelt.1
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  release_value %0 : $FakeOptional<Builtin.NativeObject>
  %9999 = tuple()
  return %9999 : $()
}

// CHECK-LABEL: sil @enum_simplification_test3 : $@convention(thin) () -> () {
// CHECK: bb0
// CHECK-NEXT: enum
// CHECK-NOT: strong_retain
// CHECK-NOT: strong_release
// CHECK-NEXT: tuple
// CHECK-NEXT: return
sil @enum_simplification_test3 : $@convention(thin) () -> () {
bb0:
  %0 = enum $FakeOptional<Builtin.NativeObject>, #FakeOptional.none!enumelt
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  release_value %0 : $FakeOptional<Builtin.NativeObject>
  %9999 = tuple()
  return %9999 : $()
}

// CHECK-LABEL: sil @enum_simplification_test4 : $@convention(thin) () -> () {
// CHECK: bb0
// CHECK-NEXT: get_object
// CHECK-NEXT: function_ref @get_object
// CHECK-NEXT: apply
// CHECK-NEXT: tuple
// CHECK-NEXT: return
sil @enum_simplification_test4 : $@convention(thin) () -> () {
bb0:
  %0 = function_ref @get_object : $@convention(thin) () -> Builtin.NativeObject
  %1 = apply %0() : $@convention(thin) () -> Builtin.NativeObject
  %2 = enum $FakeOptional<Builtin.NativeObject>, #FakeOptional.some!enumelt.1, %1 : $Builtin.NativeObject
  retain_value %2 : $FakeOptional<Builtin.NativeObject>
  release_value %2 : $FakeOptional<Builtin.NativeObject>
  %9999 = tuple()
  return %9999 : $()
}

////////////////
// Loop Tests //
////////////////

// CHECK-LABEL: sil @enum_simplification_test10 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
// CHECK: bb0([[INPUT:%[0-9]+]] : $FakeOptional<Builtin.NativeObject>):
// CHECK: retain_value [[INPUT]]
// CHECK: retain_value [[INPUT]]
// CHECK: retain_value [[INPUT]]
// CHECK: retain_value [[INPUT]]
sil @enum_simplification_test10 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
bb0(%0 : $FakeOptional<Builtin.NativeObject>):
  switch_enum %0 : $FakeOptional<Builtin.NativeObject>, case #FakeOptional.some!enumelt.1: bbcase1, case #FakeOptional.none!enumelt: bbcase2

bbcase1:
  br bb1

bbcase2:
  br bb2

// Single BB Loop
bb1:
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  cond_br undef, bb1, bb9999

// Two BB Loop. We can use loop or domination to handle this case. But we don't
// handle it now.
bb2:
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  br bb3

bb3:
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  cond_br undef, bb2, bb9999

bb9999:
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  %9999 = tuple()
  return %9999 : $()
}

// Make sure we don't propagate state out of loops.
// CHECK-LABEL: sil @enum_simplification_test11 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
// CHECK: bb0([[INPUT:%[0-9]+]] : $FakeOptional<Builtin.NativeObject>):
// CHECK: retain_value [[INPUT]]
// CHECK: retain_value [[INPUT]]
sil @enum_simplification_test11 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
bb0(%0 : $FakeOptional<Builtin.NativeObject>):
  switch_enum %0 : $FakeOptional<Builtin.NativeObject>, case #FakeOptional.some!enumelt.1: bbcase1, case #FakeOptional.none!enumelt: bbcase2

bbcase1:
  br bb1

bbcase2:
  br bb2

bb1:
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  cond_br undef, bb1, bb2

bb2:
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  %9999 = tuple()
  return %9999 : $()
}

// CHECK-LABEL: sil @enum_simplification_test12 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
// CHECK: bb1:
// CHECK: release
// CHECK: bb2:
// CHECK-NOT: release
// CHECK: bb3:
// CHECK-NOT: release
sil @enum_simplification_test12 : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
bb0(%0 : $FakeOptional<Builtin.NativeObject>):
  switch_enum %0 : $FakeOptional<Builtin.NativeObject>, case #FakeOptional.some!enumelt.1: bb1, case #FakeOptional.none!enumelt: bb2

bb1:
  br bb3

bb2:
  br bb3

bb3:
  release_value %0 : $FakeOptional<Builtin.NativeObject>
  %9999 = tuple()
  return %9999 : $()
}

// CHECK-LABEL: sil @enum_simplification_test13 : $@convention(thin) (Either) -> () {
// CHECK: bb0
// CHECK: release_value
// CHECK: bb1:
// CHECK-NOT: strong_release
// CHECK-NOT: release_value
// CHECK: bb2:
// CHECK-NOT: strong_release
// CHECK-NOT: release_value
// CHECK: bb3:
// CHECK-NOT: release_value
sil @enum_simplification_test13 : $@convention(thin) (Either) -> () {
bb0(%0 : $Either):
  cond_br undef, bb1, bb2

bb1:
  %1 = unchecked_enum_data %0 : $Either, #Either.First!enumelt.1
  br bb3

bb2:
  %2 = unchecked_enum_data %0 : $Either, #Either.Second!enumelt.1
  br bb3

bb3:
  release_value %0 : $Either
  %9999 = tuple()
  return %9999 : $()
}

// CHECK-LABEL: sil @enum_simplification_test14 : $@convention(thin) (Either) -> () {
// CHECK: bb0(
// CHECK-NOT: release
// CHECK: bb1:
// CHECK: release
sil @enum_simplification_test14 : $@convention(thin) (Either) -> () {
bb0(%0 : $Either):
  %1 = unchecked_enum_data %0 : $Either, #Either.First!enumelt.1
  cond_br undef, bb1, bb2

bb1:
  release_value %0 : $Either
  br bb3

bb2:
  br bb3

bb3:
  %9999 = tuple()
  return %9999 : $()
}

// CHECK-LABEL: sil @enum_simplification_test15 : $@convention(thin) (Either, ThreeCaseEnum) -> () {
// CHECK: bb1:
// CHECK: release
// CHECK: bb2:
// CHECK-NOT: release
// CHECK: bb3:
// CHECK-NOT: release
sil @enum_simplification_test15 : $@convention(thin) (Either, ThreeCaseEnum) -> () {
bb0(%0 : $Either, %1 : $ThreeCaseEnum):
  %2 = unchecked_enum_data %0 : $Either, #Either.First!enumelt.1
  switch_enum %1 : $ThreeCaseEnum, case #ThreeCaseEnum.A!enumelt: bb1,
                  case #ThreeCaseEnum.B!enumelt: bb2,
                  case #ThreeCaseEnum.C!enumelt: bb3

bb1:
  release_value %0 : $Either
  br bb4

bb2:
  br bb4

bb3:
  br bb4

bb4:
  %9999 = tuple()
  return %9999 : $()
}

sil @unknown : $@convention(thin) () -> ()

// CHECK-LABEL: sil @enum_simplification_test16 : $@convention(thin) (FakeOptional<C>) -> () {
// CHECK: bb1:
// CHECK-NOT: release
// CHECK: bb2:
// CHECK: release_value
// CHECK: bb3
// CHECK: release
sil @enum_simplification_test16 : $@convention(thin) (FakeOptional<C>) -> () {
bb0(%0 : $FakeOptional<C>):
  switch_enum %0 : $FakeOptional<C>,
    case #FakeOptional.none!enumelt: bb1,
    case #FakeOptional.some!enumelt.1: bb2

bb1:
  br bb3

bb2:
  br bb3

bb3:
  %2 = integer_literal $Builtin.Word, 2
  %3 = integer_literal $Builtin.Word, 3
  %4 = integer_literal $Builtin.Int1, 0
  %5 = builtin "sadd_with_overflow_Word"(%2 : $Builtin.Word, %3 : $Builtin.Word, %4 : $Builtin.Int1) : $(Builtin.Word, Builtin.Int1)
  release_value %0 : $FakeOptional<C>
  %9998 = function_ref @unknown : $@convention(thin) () -> ()
  apply %9998() : $@convention(thin) () -> ()
  release_value %0 : $FakeOptional<C>
  %9999 = tuple()
  return %9999 : $()
}

// CHECK-LABEL: sil @enum_simplification_abstraction_differences : $@convention(thin) (ThreeCaseAbstractionDifference) -> () {
// CHECK: bb0(
// CHECK-NOT: release
// CHECK: bb1:
// CHECK-NOT: release
// CHECK: bb2:
// CHECK: release_value
// CHECK: bb3:
// CHECK: release_value
// CHECK: bb4:
// CHECK-NOT: release_value
sil @enum_simplification_abstraction_differences : $@convention(thin) (ThreeCaseAbstractionDifference) -> () {
bb0(%0 : $ThreeCaseAbstractionDifference):
  switch_enum %0 : $ThreeCaseAbstractionDifference,
     case #ThreeCaseAbstractionDifference.A!enumelt.1: bb1,
     case #ThreeCaseAbstractionDifference.B!enumelt.1: bb2,
     case #ThreeCaseAbstractionDifference.C!enumelt.1: bb3

bb1:
  br bb4

bb2:
  br bb4

bb3:
  br bb4

bb4:
  release_value %0 : $ThreeCaseAbstractionDifference
  %9999 = tuple()
  return %9999 : $()
}

// CHECK-LABEL: sil @sink_retains_out_of_switch_regions : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
// CHECK: bb1:
// CHECK-NOT: retain_value
// CHECK: bb2:
// CHECK-NOT: retain_value
// CHECK: bb3:
// CHECK: retain_value
sil @sink_retains_out_of_switch_regions : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
bb0(%0 : $FakeOptional<Builtin.NativeObject>):
  switch_enum %0 : $FakeOptional<Builtin.NativeObject>, case #FakeOptional.some!enumelt.1: bb1, case #FakeOptional.none!enumelt: bb2

bb1:
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  br bb3

bb2:
  br bb3

bb3:
  %1 = tuple()
  return %1 : $()
}

// CHECK-LABEL: sil @sink_retains_through_multiple_switches : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
// CHECK-NOT: retain_value
// CHECK: bb9:
// CHECK: retain_value
sil @sink_retains_through_multiple_switches : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
bb0(%0 : $FakeOptional<Builtin.NativeObject>):
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  switch_enum %0 : $FakeOptional<Builtin.NativeObject>, case #FakeOptional.some!enumelt.1: bb1, case #FakeOptional.none!enumelt: bb2

bb1:
  br bb3

bb2:
  br bb3

bb3:
  switch_enum %0 : $FakeOptional<Builtin.NativeObject>, case #FakeOptional.some!enumelt.1: bb4, case #FakeOptional.none!enumelt: bb5

bb4:
  br bb6

bb5:
  br bb6

bb6:
  switch_enum %0 : $FakeOptional<Builtin.NativeObject>, case #FakeOptional.some!enumelt.1: bb7, case #FakeOptional.none!enumelt: bb8

bb7:
  br bb9

bb8:
  br bb9

bb9:
  %1 = tuple()
  return %1 : $()
}

// CHECK-LABEL: sil @sink_retains_through_switch_with_body : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
// CHECK-NOT: retain_value
// CHECK: bb5:
// CHECK: retain_value
sil @sink_retains_through_switch_with_body : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
bb0(%0 : $FakeOptional<Builtin.NativeObject>):
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  switch_enum %0 : $FakeOptional<Builtin.NativeObject>, case #FakeOptional.some!enumelt.1: bb1, case #FakeOptional.none!enumelt: bb2

bb1:
  br bb3

bb2:
  br bb4

bb3:
  br bb5

bb4:
  br bb5

bb5:
  %1 = tuple()
  return %1 : $()
}

// Make sure that we blot pointers from the enumbbtoenumbbcaselist map after
// merging predecessors. This ensures that the failure to merge unrelating
// values does not stop sinking out of retain, release regions.
// CHECK-LABEL: sil @enumbbtoenumbbcaselist_invalidation_test : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
// CHECK: bb3:
// CHECK: retain_value
sil @enumbbtoenumbbcaselist_invalidation_test : $@convention(thin) (FakeOptional<Builtin.NativeObject>) -> () {
bb0(%0 : $FakeOptional<Builtin.NativeObject>):
  switch_enum %0 : $FakeOptional<Builtin.NativeObject>, case #FakeOptional.some!enumelt.1: bb1, case #FakeOptional.none!enumelt: bb2

bb1:
  retain_value %0 : $FakeOptional<Builtin.NativeObject>
  br bb3

bb2:
  %1 = enum $FakeOptional<Builtin.NativeObject>, #FakeOptional.none!enumelt
  br bb3

bb3:
  %2 = tuple()
  return %2 : $()
}

class F {}
class G {}

// CHECK-LABEL: sil @cast_consumption
// CHECK: store
// CHECK-NEXT: strong_retain
// CHECK-NEXT: unconditional_checked_cast_addr
// CHECK-NEXT: strong_release
sil @cast_consumption : $@convention(thin) (@owned F) -> () {
bb0(%0 : $F):
  %1 = alloc_stack $F
  store %0 to %1 : $*F
  strong_retain %0 : $F
  unconditional_checked_cast_addr F in %1 : $*F to G in %1 : $*F
  strong_release %0 : $F
  dealloc_stack %1 : $*F
  %2 = tuple ()
  return %2 : $()
}

// Make sure that is_unique stops code motion.
// CHECK-LABEL: sil @is_unique_stops_codemotion : $@convention(thin) (@inout Builtin.NativeObject) -> () {
// CHECK: bb0([[IN:%[0-9]+]] : $*Builtin.NativeObject):
// CHECK: [[LD:%[0-9]+]] = load [[IN]] : $*Builtin.NativeObject
// CHECK: strong_retain [[LD]] : $Builtin.NativeObject
// CHECK: is_unique [[IN]] : $*Builtin.NativeObject
sil @is_unique_stops_codemotion : $@convention(thin) (@inout Builtin.NativeObject) -> () {
bb0(%0 : $*Builtin.NativeObject):
  %1 = load %0 : $*Builtin.NativeObject
  strong_retain %1 : $Builtin.NativeObject
  is_unique %0 : $*Builtin.NativeObject
  %9999 = tuple()
  return %9999 : $()
}

sil @no_return_func : $@convention(thin) () -> Never

// Make sure that we do not move retains over noreturn functions.
// CHECK-LABEL: sil @no_return_stops_codemotion : $@convention(thin) (Builtin.NativeObject) -> () {
// CHECK: apply
// CHECK-NEXT: unreachable
sil @no_return_stops_codemotion : $@convention(thin) (Builtin.NativeObject) -> () {
bb0(%0 : $Builtin.NativeObject):
  %1 = alloc_ref $C
  strong_retain %1 : $C
  %9999 = function_ref @no_return_func : $@convention(thin) () -> Never
  apply %9999() : $@convention(thin) () -> Never
  unreachable
}

// CHECK-LABEL: sil @hoist_release_partially_available_retain
// CHECK: bb0
// CHECK: cond_br undef, bb1, bb2
// CHECK: bb1:
// CHECK-NEXT: br bb3
// CHECK: bb2:
// CHECK: strong_retain
// CHECK: apply
// CHECK: strong_release
// CHECK: br bb3
// CHECK: bb3:
// CHECK-NOT: strong_release
// CHECK: return
sil @hoist_release_partially_available_retain : $@convention(thin) (Builtin.NativeObject, Builtin.NativeObject) -> () {
bb0(%0 : $Builtin.NativeObject, %1: $Builtin.NativeObject):
  cond_br undef, bb1, bb2

bb1:
  strong_retain %0: $Builtin.NativeObject
  br bb3

bb2:
  strong_retain %0: $Builtin.NativeObject
  %2 = function_ref @blocker : $@convention(thin) () -> ()
  apply %2() : $@convention(thin) () -> ()
  br bb3

bb3:
  strong_release %0: $Builtin.NativeObject
  %5 = tuple()
  return %5 : $()
}

// Make sure release can be hoisted across memory that do not escape.
// CHECK-LABEL: sil @hoist_release_across_local_memory_use
// CHECK: bb1:
// CHECK-NEXT: br bb3
// CHECK: bb2:
// CHECK: strong_release
// CHECK: br bb3
// CHECK: bb3:
// CHECK-NOT: strong_release
// CHECK: return
sil @hoist_release_across_local_memory_use : $@convention(thin) (Builtin.NativeObject) ->() {
bb0(%0 : $Builtin.NativeObject):
  %1 = alloc_stack $A
  cond_br undef, bb1, bb2

bb1:
  strong_retain %0 : $Builtin.NativeObject
  br bb3

bb2:
  br bb3

bb3:
  %2 = integer_literal $Builtin.Int32, 0
  %3 = struct $A (%2 : $Builtin.Int32)
  store %3 to %1 : $*A
  strong_release %0 : $Builtin.NativeObject
  dealloc_stack %1 : $*A
  %5 = tuple()
  return %5 : $()
}

// Make sure release can not be hoisted across memory that do escape. i.e. the release
// deinit can read or write to the memory.
// CHECK-LABEL: sil @hoist_release_across_escaping_param_memory_use
// CHECK: bb1:
// CHECK-NOT: strong_release
// CHECK: br bb3
// CHECK: bb2:
// CHECK-NOT: strong_release
// CHECK: br bb3
// CHECK: bb3:
// CHECK: store
// CHECK: strong_release
// CHECK: return
sil @hoist_release_across_escaping_param_memory_use : $@convention(thin) (Builtin.NativeObject, C2) ->() {
bb0(%0 : $Builtin.NativeObject, %1 : $C2):
  %2 = ref_element_addr %1 : $C2, #C2.current
  cond_br undef, bb1, bb2

bb1:
  strong_retain %0 : $Builtin.NativeObject
  br bb3

bb2:
  br bb3

bb3:
  %3 = integer_literal $Builtin.Int32, 0
  %4 = struct $A (%3 : $Builtin.Int32)
  store %4 to %2 : $*A
  strong_release %0 : $Builtin.NativeObject
  %5 = tuple()
  return %5 : $()
}

// Make sure release can not be hoisted across memory that do escape, even though its allocated locally.
// i.e. the release
// deinit can read or write to the memory.
// CHECK-LABEL: sil @hoist_release_across_escaping_local_alloc_memory_use
// CHECK: bb1:
// CHECK-NOT: strong_release
// CHECK: br bb3
// CHECK: bb2:
// CHECK-NOT: strong_release
// CHECK: br bb3
// CHECK: bb3:
// CHECK: store
// CHECK: strong_release
// CHECK: return
sil @hoist_release_across_escaping_local_alloc_memory_use : $@convention(thin) (Builtin.NativeObject) ->() {
bb0(%0 : $Builtin.NativeObject):
  %1 = alloc_ref $C2
  %2 = ref_element_addr %1 : $C2, #C2.current
  cond_br undef, bb1, bb2

bb1:
  strong_retain %0 : $Builtin.NativeObject
  br bb3

bb2:
  br bb3

bb3:
  %22 = function_ref @use_C2 : $@convention(thin) (C2) -> ()
  %23 = apply %22(%1) : $@convention(thin) (C2) -> ()
  %3 = integer_literal $Builtin.Int32, 0
  %4 = struct $A (%3 : $Builtin.Int32)
  store %4 to %2 : $*A
  strong_release %0 : $Builtin.NativeObject
  %5 = tuple()
  return %5 : $()
}

// CHECK-LABEL: sil @hoist_silargument_release
// CHECK: bb1
// CHECK: strong_retain
// CHECK: apply
// CHECK: strong_release
// CHECK: br
// CHECK: bb2
// CHECK-NEXT: br
// CHECK: bb3
sil @hoist_silargument_release : $@convention(thin) (@owned X, @owned X) -> () {
bb0(%0 : $X, %1 : $X):
  cond_br undef, bb1, bb2

bb1:
  strong_retain %0 : $X
  %5 = function_ref @blocker : $@convention(thin) () -> ()
  apply %5() : $@convention(thin) () -> ()
  br bb3(%0 : $X)

bb2:
  strong_retain %1 : $X
  br bb3(%1 : $X)

bb3(%3 : $X):
  strong_release %3 : $X
  %23 = tuple ()
  return %23 : $()
}

// CHECK: sil @dont_hoist_release_accross_cast
// CHECK: retain
// CHECK: apply
// CHECK: unconditional_checked_cast
// CHECK: release
sil @dont_hoist_release_accross_cast : $@convention(thin) (Builtin.NativeObject, Builtin.NativeObject) -> () {
bb0(%0 : $Builtin.NativeObject, %1: $Builtin.NativeObject):
  strong_retain %0: $Builtin.NativeObject
  %2 = function_ref @blocker : $@convention(thin) () -> ()
  apply %2() : $@convention(thin) () -> ()
	%3 = unconditional_checked_cast %0 : $Builtin.NativeObject to $B
  strong_release %0: $Builtin.NativeObject
  %5 = tuple()
  return %5 : $()
}

// CHECK: sil @dont_hoist_release_accross_cast_value
// CHECK: retain
// CHECK: apply
// CHECK: unconditional_checked_cast
// CHECK: release
sil @dont_hoist_release_accross_cast_value : $@convention(thin) (Builtin.NativeObject, Builtin.NativeObject) -> () {
bb0(%0 : $Builtin.NativeObject, %1: $Builtin.NativeObject):
  strong_retain %0: $Builtin.NativeObject
  %2 = function_ref @blocker : $@convention(thin) () -> ()
  apply %2() : $@convention(thin) () -> ()
  %c = unconditional_checked_cast_value %0 : $Builtin.NativeObject to $B
  strong_release %0: $Builtin.NativeObject
  %5 = tuple()
  return %5 : $()
}