TEST: tests for instanceof are modified to take in account null and nullable

backend.native/tests/build.gradle

@@ -252,7 +252,8 @@ task objectBasic(type: UnitKonanTest) {
     source = "codegen/klass/basic.kt"
 }
 
-task check_type(type: UnitKonanTest) {
+task check_type(type: RunKonanTest) {
+    goldValue = "true\nfalse\ntrue\ntrue\ntrue\ntrue\n"
     source = "codegen/basics/check_type.kt"
 }
 

backend.native/tests/codegen/basics/check_type.kt

@@ -4,13 +4,14 @@ class B() {}
 
 //-----------------------------------------------------------------------------//
 
-fun isTypeOf(a: Any) : Boolean {
+fun isTypeOf(a: Any?) : Boolean {
   return a is A
 }
 
-fun check_type(): Boolean {
-  val a = A()
-  return isTypeOf(a)
+//-----------------------------------------------------------------------------//
+
+fun isTypeNullableOf(a: Any?) : Boolean {
+  return a is A?
 }
 
 //-----------------------------------------------------------------------------//
@@ -19,34 +20,20 @@ fun isNotTypeOf(a: Any) : Boolean {
   return a !is A
 }
 
-fun check_not_type(): Boolean {
-  val b = B()
-  return isNotTypeOf(b)
-}
-
 //-----------------------------------------------------------------------------//
 
 fun isTypeOfInterface(a: Any) : Boolean {
   return a is I
 }
 
-fun check_interface(): Boolean {
-  val a = A()
-  return isTypeOfInterface(a)
-}
+//-----------------------------------------------------------------------------//
 
-//interface AI {
-//  fun v():Int
-//}
-//
-//val global:Int = 1
-//class A1() : AI {
-//  override fun v():Int = global
-//}
-//
-//fun smartCast(a:Any): Int {
-//  if (a is AI) {
-//    return a.v()
-//  }
-//  return 24
-//}
+fun main(args: Array<String>) {
+
+  println(isTypeOf(A()))
+  println(isTypeOf(null))
+  println(isTypeNullableOf(A()))
+  println(isTypeNullableOf(null))
+  println(isNotTypeOf(B()))
+  println(isTypeOfInterface(A()))
+}