[K/N] Added isSubtype intrinsic

kotlin-native/runtime/src/compiler_interface/cpp/CompilerCInterface.cpp

@@ -53,8 +53,8 @@ touchFunction(FreezeSubgraph)
 touchFunction(CheckGlobalsAccessible)
 
 touchFunction(LookupInterfaceTableRecord)
-touchFunction(IsInstance)
-touchFunction(IsInstanceOfClassFast)
+touchFunction(IsSubtype)
+touchFunction(IsSubclassFast)
 
 touchFunction(ThrowException)
 touchFunction(Kotlin_getExceptionObject)

kotlin-native/runtime/src/main/cpp/Types.cpp

@@ -12,6 +12,10 @@ KBoolean IsInstance(const ObjHeader* obj, const TypeInfo* type_info) {
   // We assume null check is handled by caller.
   RuntimeAssert(obj != nullptr, "must not be null");
   const TypeInfo* obj_type_info = obj->type_info();
+  return IsSubtype(obj_type_info, type_info);
+}
+
+KBoolean IsSubtype(const TypeInfo* obj_type_info, const TypeInfo* type_info) {
   // If it is an interface - check in list of implemented interfaces.
   if ((type_info->flags_ & TF_INTERFACE) != 0) {
     for (int i = 0; i < obj_type_info->implementedInterfacesCount_; ++i) {
@@ -27,10 +31,7 @@ KBoolean IsInstance(const ObjHeader* obj, const TypeInfo* type_info) {
   return obj_type_info != nullptr;
 }
 
-KBoolean IsInstanceOfClassFast(const ObjHeader* obj, int32_t lo, int32_t hi) {
-  // We assume null check is handled by caller.
-  RuntimeAssert(obj != nullptr, "must not be null");
-  const TypeInfo* obj_type_info = obj->type_info();
+KBoolean IsSubclassFast(const TypeInfo* obj_type_info, int32_t lo, int32_t hi) {
   // Super type's interval should contain our interval.
   return obj_type_info->classId_ >= lo && obj_type_info->classId_ <= hi;
 }

kotlin-native/runtime/src/main/cpp/Types.h

@@ -73,7 +73,8 @@ extern const TypeInfo* theCleanerImplTypeInfo;
 extern const TypeInfo* theRegularWeakReferenceImplTypeInfo;
 
 KBoolean IsInstance(const ObjHeader* obj, const TypeInfo* type_info) RUNTIME_PURE;
-KBoolean IsInstanceOfClassFast(const ObjHeader* obj, int32_t lo, int32_t hi) RUNTIME_PURE;
+KBoolean IsSubtype(const TypeInfo* obj_type_info, const TypeInfo* type_info) RUNTIME_PURE;
+KBoolean IsSubclassFast(const TypeInfo* obj_type_info, int32_t lo, int32_t hi) RUNTIME_PURE;
 void CheckCast(const ObjHeader* obj, const TypeInfo* type_info);
 KBoolean IsArray(KConstRef obj) RUNTIME_PURE;
 bool IsSubInterface(const TypeInfo* thiz, const TypeInfo* other) RUNTIME_PURE;

kotlin-native/runtime/src/main/kotlin/kotlin/native/internal/IntrinsicType.kt

@@ -52,6 +52,7 @@ internal class IntrinsicType {
         const val IDENTITY                      = "IDENTITY"
         const val IMMUTABLE_BLOB                = "IMMUTABLE_BLOB"
         const val INIT_INSTANCE                 = "INIT_INSTANCE"
+        const val IS_SUBTYPE                    = "IS_SUBTYPE"
         const val IS_EXPERIMENTAL_MM            = "IS_EXPERIMENTAL_MM"
         const val THE_UNIT_INSTANCE             = "THE_UNIT_INSTANCE"
 

kotlin-native/runtime/src/main/kotlin/kotlin/native/internal/RuntimeUtils.kt

@@ -226,6 +226,10 @@ internal external fun <T> createUninitializedInstance(): T
 @TypedIntrinsic(IntrinsicType.INIT_INSTANCE)
 internal external fun initInstance(thiz: Any, constructorCall: Any): Unit
 
+@PublishedApi
+@TypedIntrinsic(IntrinsicType.IS_SUBTYPE)
+internal external fun <T> isSubtype(objTypeInfo: NativePtr): Boolean
+
 @PublishedApi
 internal fun checkProgressionStep(step: Int)  =
         if (step > 0) step else throw IllegalArgumentException("Step must be positive, was: $step.")