test/SILOptimizer/external_func_definition_elim_transparent_methods.sil

// RUN: %target-sil-opt -assume-parsing-unqualified-ownership-sil -external-func-definition-elim %s | %FileCheck %s

// Check that public_external transparent methods referenced from vtables
// and witness tables are not removed by ExternalFunctionDefinitionsElimination.

sil_stage canonical

import Builtin
import Swift
import SwiftShims

private class Base {
	init()
  func foo()
}

private class Derived : Base {
}

sil private @BaseInit : $@convention(method) (@owned Base) -> @owned Base {
bb0(%4 : $Base):
  return %4 : $Base
}

sil private @DerivedInit : $@convention(method) (@owned Derived) -> @owned Derived {
bb0(%4 : $Derived):
  return %4 : $Derived
}

sil public_external [transparent] @foo : $@convention(method) (@guaranteed Base) -> () {
bb0(%0 : $Base):
  %2 = tuple ()
  return %2 : $()
} // end sil function 'foo'


sil_vtable Base {
  #Base.init!initializer.1: BaseInit
  #Base.foo!1: foo
}

sil_vtable Derived {
  #Base.init!initializer.1: DerivedInit
  #Base.foo!1: foo
}

// CHECK-LABEL: sil public_external [transparent] @foo
// CHECK: end sil function 'foo'

// CHECK-LABEL: sil_vtable Base
// CHECK-: BaseInit

// CHECK-LABEL: sil_vtable Derived
// CHECK: DerivedInit