// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -enable-objc-interop -parse-as-library -emit-ir %s | %FileCheck %s --check-prefix=CHECK-%target-object-format
// REQUIRES: objc_codegen

// It tests whether the vars @"\01l_OBJC_LABEL_PROTOCOL_$__TtP18objc_protocol_vars1T_"
// and @"\01l_OBJC_PROTOCOL_REFERENCE_$__TtP18objc_protocol_vars1T_" are in llvm.used.
//
// import Foundation
// @objc
// public protocol T: AnyObject {
//
//    var current: Int32 { get }
//
//    func clone() -> T
//
//}
sil_stage canonical

import Builtin
import Swift
import SwiftShims

import Foundation

@objc public protocol T : AnyObject {
  @objc var current: Int32 { get }
  @objc func clone() -> T
}

// CHECK-macho: @llvm.used = appending global [{{.*}}] [{{.*}}, ptr @"\01l_OBJC_LABEL_PROTOCOL_$__TtP18objc_protocol_vars1T_", ptr @"\01l_OBJC_PROTOCOL_REFERENCE_$__TtP18objc_protocol_vars1T_", {{.*}}], {{.*}}
// CHECK-elf: @llvm.used = appending global [{{.*}}] [{{.*}}, ptr @"\01l_OBJC_LABEL_PROTOCOL_$__TtP18objc_protocol_vars1T_", ptr @"\01l_OBJC_PROTOCOL_REFERENCE_$__TtP18objc_protocol_vars1T_", {{.*}}], {{.*}}
// CHECK-coff: @llvm.used = appending global [{{.*}}] [{{.*}}, ptr @"\01l_OBJC_LABEL_PROTOCOL_$__TtP18objc_protocol_vars1T_", ptr @"\01l_OBJC_PROTOCOL_REFERENCE_$__TtP18objc_protocol_vars1T_", {{.*}}], {{.*}}