Add KotlinBuiltIns#isBuiltIn, use it instead of other utilities

compiler/backend/src/org/jetbrains/kotlin/codegen/CollectionStubMethodGenerator.kt

@@ -16,6 +16,7 @@
 
 package org.jetbrains.kotlin.codegen
 
+import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.codegen.state.KotlinTypeMapper
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor.Kind.DECLARATION
@@ -24,7 +25,6 @@ import org.jetbrains.kotlin.descriptors.annotations.Annotations
 import org.jetbrains.kotlin.load.java.BuiltinMethodsWithSpecialGenericSignature.getSpecialSignatureInfo
 import org.jetbrains.kotlin.load.java.BuiltinMethodsWithSpecialGenericSignature.isBuiltinWithSpecialDescriptorInJvm
 import org.jetbrains.kotlin.load.java.descriptors.JavaClassDescriptor
-import org.jetbrains.kotlin.load.java.isFromBuiltins
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.platform.JavaToKotlinClassMap
 import org.jetbrains.kotlin.resolve.DescriptorUtils
@@ -191,7 +191,7 @@ class CollectionStubMethodGenerator(
     private fun isDefaultInJdk(method: FunctionDescriptor) =
         method.modality != Modality.ABSTRACT &&
         method.original.overriddenTreeUniqueAsSequence(useOriginal = true).all {
-            it.kind == FAKE_OVERRIDE || it.isFromBuiltins()
+            it.kind == FAKE_OVERRIDE || KotlinBuiltIns.isBuiltIn(it)
         }
 
     private data class CollectionClassPair(

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/checkers/AdditionalBuiltInsMembersChecker.kt

@@ -17,6 +17,7 @@
 package org.jetbrains.kotlin.resolve.jvm.checkers
 
 import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.config.LanguageFeature
 import org.jetbrains.kotlin.config.LanguageVersionSettings
 import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
@@ -25,7 +26,6 @@ import org.jetbrains.kotlin.diagnostics.DiagnosticSink
 import org.jetbrains.kotlin.diagnostics.Errors
 import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.load.java.descriptors.JavaCallableMemberDescriptor
-import org.jetbrains.kotlin.load.java.isFromBuiltins
 import org.jetbrains.kotlin.psi.KtDeclaration
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.checkers.DeclarationChecker
@@ -53,10 +53,9 @@ private fun reportErrorIfAdditionalBuiltinDescriptor(
         diagnosticHolder: DiagnosticSink,
         reportOn: PsiElement
 ) {
-    @Suppress("UNCHECKED_CAST")
-    val overriddenTree = descriptor.overriddenTreeUniqueAsSequence(useOriginal = true) as Sequence<CallableMemberDescriptor>
+    val overriddenTree = descriptor.overriddenTreeUniqueAsSequence(useOriginal = true)
 
-    if (overriddenTree.any { it.isFromBuiltins() && it is JavaCallableMemberDescriptor }) {
+    if (overriddenTree.any { KotlinBuiltIns.isBuiltIn(it) && it is JavaCallableMemberDescriptor }) {
         diagnosticHolder.report(Errors.UNSUPPORTED_FEATURE.on(reportOn, LanguageFeature.AdditionalBuiltInsMembers))
     }
 }

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/JavaIncompatibilityRulesOverridabilityCondition.kt

@@ -60,7 +60,8 @@ class JavaIncompatibilityRulesOverridabilityCondition : ExternalOverridabilityCo
             subDescriptor: CallableDescriptor,
             subClassDescriptor: ClassDescriptor?
     ): Boolean {
-        if (superDescriptor !is CallableMemberDescriptor || subDescriptor !is FunctionDescriptor || subDescriptor.isFromBuiltins()) {
+        if (superDescriptor !is CallableMemberDescriptor || subDescriptor !is FunctionDescriptor ||
+            KotlinBuiltIns.isBuiltIn(subDescriptor)) {
             return false
         }
 

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/specialBuiltinMembers.kt

@@ -31,7 +31,10 @@ import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.FqNameUnsafe
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.DescriptorUtils
-import org.jetbrains.kotlin.resolve.descriptorUtil.*
+import org.jetbrains.kotlin.resolve.descriptorUtil.firstOverridden
+import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameOrNull
+import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameSafe
+import org.jetbrains.kotlin.resolve.descriptorUtil.propertyIfAccessor
 import org.jetbrains.kotlin.resolve.jvm.JvmPrimitiveType
 import org.jetbrains.kotlin.types.checker.TypeCheckingProcedure
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns.FQ_NAMES as BUILTIN_NAMES
@@ -74,7 +77,7 @@ object BuiltinSpecialProperties {
 
     private fun CallableMemberDescriptor.hasBuiltinSpecialPropertyFqNameImpl(): Boolean {
         if (fqNameOrNull() in SPECIAL_FQ_NAMES && valueParameters.isEmpty()) return true
-        if (!isFromBuiltins()) return false
+        if (!KotlinBuiltIns.isBuiltIn(this)) return false
 
         return overriddenDescriptors.any { hasBuiltinSpecialPropertyFqName(it) }
     }
@@ -83,7 +86,7 @@ object BuiltinSpecialProperties {
             GETTER_JVM_NAME_TO_PROPERTIES_SHORT_NAME_MAP[name1] ?: emptyList()
 
     fun CallableMemberDescriptor.getBuiltinSpecialPropertyGetterName(): String? {
-        assert(isFromBuiltins()) { "This method is defined only for builtin members, but $this found" }
+        assert(KotlinBuiltIns.isBuiltIn(this)) { "This method is defined only for builtin members, but $this found" }
 
         val descriptor = propertyIfAccessor.firstOverridden { hasBuiltinSpecialPropertyFqName(it) } ?: return null
         return PROPERTY_FQ_NAME_TO_JVM_GETTER_NAME_MAP[descriptor.fqNameSafe]?.asString()
@@ -178,7 +181,7 @@ object BuiltinMethodsWithSpecialGenericSignature {
     }
 
     fun CallableMemberDescriptor.isBuiltinWithSpecialDescriptorInJvm(): Boolean {
-        if (!isFromBuiltins()) return false
+        if (!KotlinBuiltIns.isBuiltIn(this)) return false
         return getSpecialSignatureInfo()?.isObjectReplacedWithTypeParameter ?: false || doesOverrideBuiltinWithDifferentJvmName()
     }
 
@@ -240,8 +243,7 @@ object BuiltinMethodsWithDifferentJvmName {
     }
 
     fun isBuiltinFunctionWithDifferentNameInJvm(functionDescriptor: SimpleFunctionDescriptor): Boolean {
-        if (!functionDescriptor.isFromBuiltins()) return false
-        return functionDescriptor.firstOverridden {
+        return KotlinBuiltIns.isBuiltIn(functionDescriptor) && functionDescriptor.firstOverridden {
             SIGNATURE_TO_JVM_REPRESENTATION_NAME.containsKey(functionDescriptor.computeJvmSignature())
         } != null
     }
@@ -279,7 +281,7 @@ fun <T : CallableMemberDescriptor> T.getOverriddenSpecialBuiltin(): T? {
     if (!name.sameAsBuiltinMethodWithErasedValueParameters) return null
 
     return firstOverridden {
-        it.isFromBuiltins() && it.getSpecialSignatureInfo() != null
+        KotlinBuiltIns.isBuiltIn(it) && it.getSpecialSignatureInfo() != null
     } as T?
 }
 
@@ -295,7 +297,7 @@ fun <T : CallableMemberDescriptor> T.getOverriddenBuiltinReflectingJvmDescriptor
     if (!name.sameAsBuiltinMethodWithErasedValueParameters) return null
 
     return firstOverridden {
-        it.isFromBuiltins() && it.getSpecialSignatureInfo()?.isObjectReplacedWithTypeParameter ?: false
+        KotlinBuiltIns.isBuiltIn(it) && it.getSpecialSignatureInfo()?.isObjectReplacedWithTypeParameter ?: false
     }?.original as T?
 }
 
@@ -311,13 +313,9 @@ fun getJvmMethodNameIfSpecial(callableMemberDescriptor: CallableMemberDescriptor
 
 private fun getOverriddenBuiltinThatAffectsJvmName(
         callableMemberDescriptor: CallableMemberDescriptor
-): CallableMemberDescriptor? {
-    val overriddenBuiltin = callableMemberDescriptor.getOverriddenBuiltinWithDifferentJvmName() ?: return null
-
-    if (callableMemberDescriptor.isFromBuiltins()) return overriddenBuiltin
-
-    return null
-}
+): CallableMemberDescriptor? =
+        if (KotlinBuiltIns.isBuiltIn(callableMemberDescriptor)) callableMemberDescriptor.getOverriddenBuiltinWithDifferentJvmName()
+        else null
 
 fun ClassDescriptor.hasRealKotlinSuperClassWithOverrideOf(
         specialCallableDescriptor: CallableDescriptor
@@ -334,9 +332,7 @@ fun ClassDescriptor.hasRealKotlinSuperClassWithOverrideOf(
                     TypeCheckingProcedure.findCorrespondingSupertype(superClassDescriptor.defaultType, builtinContainerDefaultType) != null
 
             if (doesOverrideBuiltinDeclaration) {
-                val containingPackageFragment = DescriptorUtils.getParentOfType(superClassDescriptor, PackageFragmentDescriptor::class.java)
-                if (superClassDescriptor.builtIns.isBuiltInPackageFragment(containingPackageFragment)) return false
-                return true
+                return !KotlinBuiltIns.isBuiltIn(superClassDescriptor)
             }
         }
 
@@ -348,12 +344,8 @@ fun ClassDescriptor.hasRealKotlinSuperClassWithOverrideOf(
 
 // Util methods
 val CallableMemberDescriptor.isFromJava: Boolean
-    get() = propertyIfAccessor is JavaCallableMemberDescriptor && propertyIfAccessor.containingDeclaration is JavaClassDescriptor
+    get() = propertyIfAccessor.let { descriptor ->
+        (descriptor as? JavaCallableMemberDescriptor)?.containingDeclaration is JavaClassDescriptor
+    }
 
-fun CallableMemberDescriptor.isFromBuiltins(): Boolean {
-    val fqNameUnsafe = propertyIfAccessor.fqNameUnsafe
-    return fqNameUnsafe.startsWith(KotlinBuiltIns.BUILT_INS_PACKAGE_NAME) &&
-            this.module == this.builtIns.builtInsModule
-}
-
-fun CallableMemberDescriptor.isFromJavaOrBuiltins() = isFromJava || isFromBuiltins()
+fun CallableMemberDescriptor.isFromJavaOrBuiltins() = isFromJava || KotlinBuiltIns.isBuiltIn(this)

core/descriptors/src/org/jetbrains/kotlin/builtins/KotlinBuiltIns.java

@@ -288,8 +288,8 @@ public abstract class KotlinBuiltIns {
         return builtInsPackageFragment;
     }
 
-    public boolean isBuiltInPackageFragment(@Nullable PackageFragmentDescriptor packageFragment) {
-        return packageFragment != null && packageFragment.getContainingDeclaration() == getBuiltInsModule();
+    public static boolean isBuiltIn(@NotNull DeclarationDescriptor descriptor) {
+        return DescriptorUtils.getParentOfType(descriptor, BuiltInsPackageFragment.class, false) != null;
     }
 
     @NotNull

js/js.frontend/src/org/jetbrains/kotlin/js/descriptorUtils/descriptorUtils.kt

@@ -17,23 +17,16 @@
 package org.jetbrains.kotlin.js.descriptorUtils
 
 import com.intellij.openapi.util.text.StringUtil
+import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
-import org.jetbrains.kotlin.descriptors.PackageFragmentDescriptor
 import org.jetbrains.kotlin.descriptors.TypeParameterDescriptor
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.DescriptorUtils
-import org.jetbrains.kotlin.resolve.descriptorUtil.builtIns
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.utils.addToStdlib.check
 
 val KotlinType.nameIfStandardType: Name?
-    get() {
-        return constructor.declarationDescriptor
-                ?.check { descriptor ->
-                    descriptor.builtIns.isBuiltInPackageFragment(descriptor.containingDeclaration as? PackageFragmentDescriptor)
-                }
-                ?.name
-    }
+    get() = constructor.declarationDescriptor?.check(KotlinBuiltIns::isBuiltIn)?.name
 
 fun KotlinType.getJetTypeFqName(printTypeArguments: Boolean): String {
     val declaration = requireNotNull(constructor.declarationDescriptor)
@@ -47,8 +40,9 @@ fun KotlinType.getJetTypeFqName(printTypeArguments: Boolean): String {
     if (printTypeArguments && !typeArguments.isEmpty()) {
         val joinedTypeArguments = StringUtil.join(typeArguments, { projection -> projection.type.getJetTypeFqName(false) }, ", ")
 
-        typeArgumentsAsString = "<" + joinedTypeArguments + ">"
-    } else {
+        typeArgumentsAsString = "<$joinedTypeArguments>"
+    }
+    else {
         typeArgumentsAsString = ""
     }
 

js/js.translator/src/org/jetbrains/kotlin/js/translate/intrinsic/functions/factories/PrimitiveBinaryOperationFIF.java

@@ -24,6 +24,7 @@ import com.google.dart.compiler.backend.js.ast.JsBinaryOperator;
 import com.google.dart.compiler.backend.js.ast.JsExpression;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.jetbrains.kotlin.builtins.KotlinBuiltIns;
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor;
 import org.jetbrains.kotlin.js.patterns.DescriptorPredicate;
 import org.jetbrains.kotlin.js.patterns.NamePredicate;
@@ -31,7 +32,6 @@ import org.jetbrains.kotlin.js.translate.context.TranslationContext;
 import org.jetbrains.kotlin.js.translate.intrinsic.functions.basic.FunctionIntrinsic;
 import org.jetbrains.kotlin.js.translate.operation.OperatorTable;
 import org.jetbrains.kotlin.js.translate.utils.JsAstUtils;
-import org.jetbrains.kotlin.js.translate.utils.JsDescriptorUtils;
 import org.jetbrains.kotlin.lexer.KtToken;
 import org.jetbrains.kotlin.name.Name;
 import org.jetbrains.kotlin.types.expressions.OperatorConventions;
@@ -144,7 +144,7 @@ public enum PrimitiveBinaryOperationFIF implements FunctionIntrinsicFactory {
         }
 
 
-        if (JsDescriptorUtils.isBuiltin(descriptor) && descriptor.getName().equals(OperatorNameConventions.COMPARE_TO)) {
+        if (KotlinBuiltIns.isBuiltIn(descriptor) && descriptor.getName().equals(OperatorNameConventions.COMPARE_TO)) {
             return BUILTINS_COMPARE_TO_INTRINSIC;
         }
 

js/js.translator/src/org/jetbrains/kotlin/js/translate/intrinsic/operation/CompareToBOIF.kt

@@ -16,19 +16,19 @@
 
 package org.jetbrains.kotlin.js.translate.intrinsic.operation
 
-import com.google.common.collect.ImmutableSet
-import com.google.dart.compiler.backend.js.ast.*
+import com.google.dart.compiler.backend.js.ast.JsBinaryOperation
+import com.google.dart.compiler.backend.js.ast.JsExpression
+import com.google.dart.compiler.backend.js.ast.JsNumberLiteral
+import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor
-import org.jetbrains.kotlin.psi.KtBinaryExpression
-import org.jetbrains.kotlin.types.expressions.OperatorConventions
-import org.jetbrains.kotlin.lexer.KtToken
 import org.jetbrains.kotlin.js.patterns.PatternBuilder.pattern
 import org.jetbrains.kotlin.js.translate.context.TranslationContext
 import org.jetbrains.kotlin.js.translate.operation.OperatorTable
 import org.jetbrains.kotlin.js.translate.utils.JsAstUtils
-import org.jetbrains.kotlin.js.translate.utils.JsDescriptorUtils
 import org.jetbrains.kotlin.js.translate.utils.PsiUtils.getOperationToken
+import org.jetbrains.kotlin.psi.KtBinaryExpression
 import org.jetbrains.kotlin.resolve.calls.tasks.isDynamic
+import org.jetbrains.kotlin.types.expressions.OperatorConventions
 
 object CompareToBOIF : BinaryOperationIntrinsicFactory {
     val COMPARE_TO_CHAR = pattern("Int|Short|Byte|Double|Float.compareTo(Char)")
@@ -69,7 +69,7 @@ object CompareToBOIF : BinaryOperationIntrinsicFactory {
     override fun getIntrinsic(descriptor: FunctionDescriptor): BinaryOperationIntrinsic? {
         if (descriptor.isDynamic()) return CompareToIntrinsic
 
-        if (!JsDescriptorUtils.isBuiltin(descriptor)) return null
+        if (!KotlinBuiltIns.isBuiltIn(descriptor)) return null
 
         return when {
             COMPARE_TO_CHAR.apply(descriptor) ->

js/js.translator/src/org/jetbrains/kotlin/js/translate/intrinsic/operation/EqualsBOIF.kt

@@ -20,9 +20,9 @@ import com.google.dart.compiler.backend.js.ast.JsBinaryOperation
 import com.google.dart.compiler.backend.js.ast.JsBinaryOperator
 import com.google.dart.compiler.backend.js.ast.JsExpression
 import com.google.dart.compiler.backend.js.ast.JsLiteral
+import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor
 import org.jetbrains.kotlin.js.patterns.NamePredicate
-import org.jetbrains.kotlin.js.patterns.PatternBuilder.pattern
 import org.jetbrains.kotlin.js.translate.context.TranslationContext
 import org.jetbrains.kotlin.js.translate.intrinsic.functions.factories.TopLevelFIF
 import org.jetbrains.kotlin.js.translate.utils.JsAstUtils
@@ -35,7 +35,7 @@ import org.jetbrains.kotlin.resolve.DescriptorUtils
 import org.jetbrains.kotlin.resolve.calls.callUtil.getResolvedCall
 import org.jetbrains.kotlin.types.expressions.OperatorConventions
 import org.jetbrains.kotlin.types.isDynamic
-import java.util.Arrays
+import java.util.*
 
 object EqualsBOIF : BinaryOperationIntrinsicFactory {
 
@@ -86,7 +86,7 @@ object EqualsBOIF : BinaryOperationIntrinsicFactory {
             when {
                 DescriptorUtils.isEnumClass(descriptor.containingDeclaration) -> EnumEqualsIntrinsic
 
-                JsDescriptorUtils.isBuiltin(descriptor) ||
+                KotlinBuiltIns.isBuiltIn(descriptor) ||
                 TopLevelFIF.EQUALS_IN_ANY.apply(descriptor) -> EqualsIntrinsic
 
                 else -> null

js/js.translator/src/org/jetbrains/kotlin/js/translate/intrinsic/operation/LongCompareToBOIF.kt

@@ -19,16 +19,13 @@ package org.jetbrains.kotlin.js.translate.intrinsic.operation
 import com.google.dart.compiler.backend.js.ast.JsBinaryOperation
 import com.google.dart.compiler.backend.js.ast.JsExpression
 import com.google.dart.compiler.backend.js.ast.JsNumberLiteral
+import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor
 import org.jetbrains.kotlin.js.patterns.PatternBuilder.pattern
 import org.jetbrains.kotlin.js.translate.context.Namer
 import org.jetbrains.kotlin.js.translate.context.TranslationContext
 import org.jetbrains.kotlin.js.translate.operation.OperatorTable
-import org.jetbrains.kotlin.js.translate.utils.JsAstUtils.charToInt
-import org.jetbrains.kotlin.js.translate.utils.JsAstUtils.compareForObject
-import org.jetbrains.kotlin.js.translate.utils.JsAstUtils.invokeMethod
-import org.jetbrains.kotlin.js.translate.utils.JsAstUtils.longFromInt
-import org.jetbrains.kotlin.js.translate.utils.JsDescriptorUtils
+import org.jetbrains.kotlin.js.translate.utils.JsAstUtils.*
 import org.jetbrains.kotlin.js.translate.utils.PsiUtils.getOperationToken
 import org.jetbrains.kotlin.psi.KtBinaryExpression
 import org.jetbrains.kotlin.types.expressions.OperatorConventions
@@ -75,7 +72,7 @@ object LongCompareToBOIF : BinaryOperationIntrinsicFactory {
     override fun getSupportTokens() = OperatorConventions.COMPARISON_OPERATIONS
 
     override fun getIntrinsic(descriptor: FunctionDescriptor): BinaryOperationIntrinsic? {
-        if (JsDescriptorUtils.isBuiltin(descriptor)) {
+        if (KotlinBuiltIns.isBuiltIn(descriptor)) {
             return when {
                 FLOATING_POINT_COMPARE_TO_LONG_PATTERN.apply(descriptor) -> FLOATING_POINT_COMPARE_TO_LONG
                 LONG_COMPARE_TO_FLOATING_POINT_PATTERN.apply(descriptor) -> LONG_COMPARE_TO_FLOATING_POINT

js/js.translator/src/org/jetbrains/kotlin/js/translate/reference/CallableReferenceTranslator.kt

@@ -19,6 +19,7 @@ package org.jetbrains.kotlin.js.translate.reference
 import com.google.dart.compiler.backend.js.ast.JsExpression
 import com.google.dart.compiler.backend.js.ast.JsInvocation
 import com.google.dart.compiler.backend.js.ast.JsLiteral
+import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.js.resolve.diagnostics.ErrorsJs
 import org.jetbrains.kotlin.js.translate.context.TranslationContext
@@ -27,7 +28,9 @@ import org.jetbrains.kotlin.js.translate.utils.BindingUtils
 import org.jetbrains.kotlin.js.translate.utils.JsDescriptorUtils
 import org.jetbrains.kotlin.psi.KtCallableReferenceExpression
 import org.jetbrains.kotlin.resolve.DescriptorUtils
-import java.util.ArrayList
+import org.jetbrains.kotlin.resolve.descriptorUtil.builtIns
+import org.jetbrains.kotlin.resolve.descriptorUtil.module
+import java.util.*
 
 object CallableReferenceTranslator {
 
@@ -50,8 +53,8 @@ object CallableReferenceTranslator {
 
     private fun translateForFunction(descriptor: FunctionDescriptor, context: TranslationContext, expression: KtCallableReferenceExpression): JsExpression {
         return when {
-        // TODO Support for callable reference to builtin functions and members
-            JsDescriptorUtils.isBuiltin(descriptor) ->
+            // TODO Support for callable reference to builtin functions and members
+            KotlinBuiltIns.isBuiltIn(descriptor) ->
                 reportNotSupported(context, expression)
             isConstructor(descriptor) ->
                 translateForConstructor(descriptor, context)
@@ -66,8 +69,8 @@ object CallableReferenceTranslator {
 
     private fun translateForProperty(descriptor: PropertyDescriptor, context: TranslationContext, expression: KtCallableReferenceExpression): JsExpression {
         return when {
-        // TODO Support for callable reference to builtin properties
-            JsDescriptorUtils.isBuiltin(descriptor) ->
+            // TODO Support for callable reference to builtin properties
+            KotlinBuiltIns.isBuiltIn(descriptor) ->
                 reportNotSupported(context, expression)
             isExtension(descriptor) ->
                 translateForExtensionProperty(descriptor, context)

js/js.translator/src/org/jetbrains/kotlin/js/translate/utils/JsDescriptorUtils.java

@@ -30,8 +30,8 @@ import org.jetbrains.kotlin.js.translate.context.TranslationContext;
 import org.jetbrains.kotlin.name.Name;
 import org.jetbrains.kotlin.psi.KtExpression;
 import org.jetbrains.kotlin.resolve.DescriptorUtils;
-import org.jetbrains.kotlin.resolve.scopes.receivers.ReceiverValue;
 import org.jetbrains.kotlin.resolve.scopes.receivers.ImplicitReceiver;
+import org.jetbrains.kotlin.resolve.scopes.receivers.ReceiverValue;
 import org.jetbrains.kotlin.types.KotlinType;
 import org.jetbrains.kotlin.util.OperatorNameConventions;
 
@@ -154,11 +154,6 @@ public final class JsDescriptorUtils {
                !ModalityKt.isOverridableOrOverrides(propertyDescriptor);
     }
 
-    public static boolean isBuiltin(@NotNull DeclarationDescriptor descriptor) {
-        PackageFragmentDescriptor containingPackageFragment = DescriptorUtils.getParentOfType(descriptor, PackageFragmentDescriptor.class);
-        return org.jetbrains.kotlin.resolve.descriptorUtil.DescriptorUtilsKt.getBuiltIns(descriptor).isBuiltInPackageFragment(containingPackageFragment);
-    }
-
     @Nullable
     public static Name getNameIfStandardType(@NotNull KtExpression expression, @NotNull TranslationContext context) {
         KotlinType type = context.bindingContext().getType(expression);
@@ -175,7 +170,7 @@ public final class JsDescriptorUtils {
 
     @Nullable
     public static String getExternalModuleName(@NotNull DeclarationDescriptor descriptor) {
-        if (isBuiltin(descriptor)) return Namer.KOTLIN_LOWER_NAME;
+        if (KotlinBuiltIns.isBuiltIn(descriptor)) return Namer.KOTLIN_LOWER_NAME;
 
         PsiElement element = descriptorToDeclaration(descriptor);
         if (element == null && descriptor instanceof PropertyAccessorDescriptor) {