// RUN: %empty-directory(%t)
// RUN: split-file %s %t
// RUN: %target-sil-opt -I %t %t/test.sil -sil-combine | %FileCheck %s

// REQUIRES: objc_interop

//--- module.modulemap

module CModule {
  header "c-header.h"
  export *
}


//--- c-header.h

@import Foundation;

@interface ObjClass : NSObject
@property (nonatomic, strong, readwrite, nonnull) NSObject *o;
@end


//--- test.sil

sil_stage canonical

import Swift
import SwiftShims
import Builtin
import CModule

@objc @implementation extension ObjClass {
  @objc @_hasStorage dynamic var o: NSObject { get set }
}

sil @swift_getAtKeyPath : $@convention(thin) <τ_0_0, τ_0_1> (@in_guaranteed τ_0_0, @guaranteed KeyPath<τ_0_0, τ_0_1>) -> @out τ_0_1

// Check that we don't crash

// CHECK-LABEL: sil @testObjcKeypath :
// CHECK:         keypath
// CHECK:         apply
// CHECK:       } // end sil function 'testObjcKeypath'
sil @testObjcKeypath : $@convention(thin) (@in_guaranteed ObjClass) -> @out NSObject {
bb0(%0 : $*NSObject, %1 : $*ObjClass):
  %2 = keypath $KeyPath<ObjClass, NSObject>, (root $ObjClass; stored_property #ObjClass.o : $NSObject)
  %3 = function_ref @swift_getAtKeyPath : $@convention(thin) <τ_0_0, τ_0_1> (@in_guaranteed τ_0_0, @guaranteed KeyPath<τ_0_0, τ_0_1>) -> @out τ_0_1
  %4 = apply %3<ObjClass, NSObject>(%0, %1, %2) : $@convention(thin) <τ_0_0, τ_0_1> (@in_guaranteed τ_0_0, @guaranteed KeyPath<τ_0_0, τ_0_1>) -> @out τ_0_1
  strong_release %2 : $KeyPath<ObjClass, NSObject>
  %6 = tuple ()
  return %6 : $()
}