IrTypes: dummy implementation of IrType.render

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/DumpIrTree.kt

@@ -208,13 +208,8 @@ class DumpIrTreeVisitor(out: Appendable) : IrElementVisitor<Unit, String> {
             "<`$index>"
     }
 
-    private fun IrMemberAccessExpression.renderTypeArgument(index: Int): String {
-        val typeArgument = getTypeArgument(index)
-        return if (typeArgument != null)
-            DescriptorRenderer.ONLY_NAMES_WITH_SHORT_TYPES.renderType(typeArgument)
-        else
-            "<none>"
-    }
+    private fun IrMemberAccessExpression.renderTypeArgument(index: Int): String =
+        getTypeArgument(index)?.render() ?: "<none>"
 
     override fun visitGetField(expression: IrGetField, data: String) {
         expression.dumpLabeledElementWith(data) {

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/RenderIrType.kt

@@ -0,0 +1,15 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.ir.util
+
+import org.jetbrains.kotlin.ir.types.IrType
+import org.jetbrains.kotlin.ir.types.impl.originalKotlinType
+import org.jetbrains.kotlin.renderer.DescriptorRenderer
+
+fun IrType.render() =
+    originalKotlinType?.let {
+        DescriptorRenderer.ONLY_NAMES_WITH_SHORT_TYPES.renderType(it)
+    } ?: "UNBOUND IrType"