[JS IR BE] Support enumValues<T>() and enumValueOf<T>(name)

libraries/stdlib/js/irRuntime/Enum.kt

@@ -5,7 +5,9 @@
 
 package kotlin
 
-public class Enum<E : Enum<E>>(val name: String, val ordinal: Int) : Comparable<E> {
+import kotlin.js.*
+
+abstract class Enum<E : Enum<E>>(val name: String, val ordinal: Int) : Comparable<E> {
 
     override fun compareTo(other: E) = ordinal.compareTo(other.ordinal)
 
@@ -16,4 +18,14 @@ public class Enum<E : Enum<E>>(val name: String, val ordinal: Int) : Comparable<
     override fun toString() = name
 
     companion object
-}
+}
+
+// Use non-inline calls to enumValuesIntrinsic and enumValueOfIntrinsic calls in order
+// for compiler to replace them with method calls of concrete enum classes after inlining.
+// TODO: Figure out better solution (Inline hacks? Dynamic calls to stable mangled names?)
+
+@SinceKotlin("1.1")
+public inline fun <reified T : Enum<T>> enumValues(): Array<T> = enumValuesIntrinsic<T>()
+
+@SinceKotlin("1.1")
+public inline fun <reified T : Enum<T>> enumValueOf(name: String): T = enumValueOfIntrinsic<T>(name)

libraries/stdlib/js/irRuntime/kotlinJsHacks.kt

@@ -0,0 +1,14 @@
+/*
+ * 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 kotlin.js
+
+@PublishedApi
+internal fun <T : Enum<T>> enumValuesIntrinsic(): Array<T> =
+    throw IllegalStateException("Should be replaced by compiler")
+
+@PublishedApi
+internal fun <T : Enum<T>> enumValueOfIntrinsic(name: String): T =
+    throw IllegalStateException("Should be replaced by compiler")