// First parse this and then emit a *.sib. Then read in the *.sib, then recreate
// RUN: %empty-directory(%t)
// RUN: %target-sil-opt %s -emit-sib -o %t/tmp.sib -module-name temp
// RUN: %target-sil-opt %t/tmp.sib -o %t/tmp.2.sib -module-name temp
// RUN: %target-sil-opt %t/tmp.2.sib -module-name temp | %FileCheck %s

import Builtin

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

class Klass {
}
class SubKlass : Klass {
}

// Test checked_cast_br ownership forwarding.
//
// Also test unchecked_ownership_conversion @none serialization (@none
// is the highest value ownership encoding).
//
// CHECK-LABEL: sil [ossa] @checked_cast_test : $@convention(thin) (@owned Klass) -> () {
// CHECK: checked_cast_br {{.*}}, forwarding: @guaranteed
// CHECK-LABEL: } // end sil function 'checked_cast_test'
sil [ossa] @checked_cast_test : $@convention(thin) (@owned Klass) -> () {
bb0(%0 : @owned $Klass):
  %trivial = unchecked_ownership_conversion %0 : $Klass, @owned to @none
  checked_cast_br Klass in %trivial : $Klass to SubKlass, bb1, bb2, forwarding: @guaranteed

bb1(%arg1 : @guaranteed $SubKlass):
  br bb3

bb2(%arg2: @guaranteed $Klass):
  br bb3

bb3:
  destroy_value %0 : $Klass
  %8 = tuple ()
  return %8 : $()
}

// CHECK-LABEL: sil [ossa] @switch_test : $@convention(thin) () -> () {
// CHECK: switch_enum {{.*}}, forwarding: @guaranteed
// CHECK-LABEL: } // end sil function 'switch_test'
sil [ossa] @switch_test : $@convention(thin) () -> () {
  %none = enum $FakeOptional<Klass>, #FakeOptional.none
  switch_enum %none : $FakeOptional<Klass>, case #FakeOptional.some!enumelt:bb1, case #FakeOptional.none!enumelt:bb2, forwarding: @guaranteed

bb1(%arg : @guaranteed $Klass):
  br bb3

bb2:
  br bb3

bb3:
  %8 = tuple ()
  return %8 : $()
}