// RUN: %target-sil-opt -enable-sil-verify-all %s -specdevirt -code-sinking  | %FileCheck %s
// RUN: %target-sil-opt -enable-sil-verify-all %s -specdevirt -code-sinking  -wmo | %FileCheck --check-prefix=CHECK-WMO %s

sil_stage canonical

import Builtin
import Swift

// Make sure we convert a class_method into a diamond control flow
// where one of the sides is a direct call to FOO::ping.
class Foo {
  func ping()
}

class Bar : Foo {
}

sil @_TFC8testcase3Foo4pingfS0_FT_T_ : $@convention(method) (@guaranteed Foo) -> () {
bb0(%0 : $Foo):
  %2 = tuple ()                                   // user: %3
  return %2 : $()                                 // id: %3
}

sil @_TFC8testcase3FoocfMS0_FT_S0_ : $@convention(method) (@owned Foo) -> @owned Foo {
bb0(%0 : $Foo):
  return %0 : $Foo                                // id: %1
}


//CHECK-LABEL: @_TF8testcase7my_mainFCS_3FooT_
//CHECK: checked_cast_br [exact] Foo in %0 : $Foo to Foo
//CHECK: return
//CHECK: checked_cast_br [exact] Foo in %0 : $Foo to Bar
//CHECK: class_method

//CHECK-WMO-LABEL: @_TF8testcase7my_mainFCS_3FooT_
//CHECK-WMO: checked_cast_br [exact] Foo in %0 : $Foo to Foo
//CHECK-WMO: return
//CHECK-WMO: unchecked_ref_cast %0 : $Foo to $Bar
//CHECK-WMO: class_method

sil @_TF8testcase7my_mainFCS_3FooT_ : $@convention(thin) (@owned Foo) -> () {
bb0(%0 : $Foo):
  %1 = class_method %0 : $Foo, #Foo.ping : (Foo) -> () -> () , $@convention(method) (@guaranteed Foo) -> () // user: %2
  %2 = apply %1(%0) : $@convention(method) (@guaranteed Foo) -> ()
  %3 = tuple ()                                   // user: %4
  return %3 : $()                                 // id: %4
}

sil_vtable Foo {
  #Foo.ping: @_TFC8testcase3Foo4pingfS0_FT_T_	// testcase.Foo.ping (testcase.Foo)() -> ()
  #Foo.init!initializer: @_TFC8testcase3FoocfMS0_FT_S0_	// testcase.Foo.init (testcase.Foo.Type)() -> testcase.Foo
}

sil_vtable Bar {
  #Foo.ping: @_TFC8testcase3Foo4pingfS0_FT_T_ [inherited]
  #Foo.init!initializer: @_TFC8testcase3FoocfMS0_FT_S0_ [inherited]
}