// RUN: %empty-directory(%t)
// RUN: %target-swift-frontend -primary-file %s -emit-ir | %FileCheck %s

// UNSUPPORTED: OS=windows-msvc

sil_stage canonical

// CHECK-DAG: define{{( protected)?}} swiftcc void @weakButDefined() {{#[0-9]+}} {
sil public [_weakLinked] @weakButDefined : $@convention(thin) () -> () {
  %unit = tuple()
  return %unit : $()
}

// CHECK-DAG: declare extern_weak swiftcc void @weakExternal()
sil public_external [_weakLinked] @weakExternal : $@convention(thin) () -> ()

sil [_weakLinked] @testWeak : $@convention(thin) () -> () {
  %weakButDefined = function_ref @weakButDefined : $@convention(thin) () -> ()
  %wbdResult      = apply %weakButDefined() : $@convention(thin) () -> ()
  %weakExternal   = function_ref @weakExternal : $@convention(thin) () -> ()
  %weResult       = apply %weakExternal() : $@convention(thin) () -> ()
  %unit = tuple()
  return %unit : $()
}