[JS IR BE] Support exceptions in IR BE runtime

libraries/stdlib/js/irRuntime/exceptions.kt

@@ -0,0 +1,59 @@
+/*
+ * 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
+
+open class Exception(override val message: String?, override val cause: Throwable?) : Throwable() {
+    constructor() : this(null, null)
+    constructor(_message: String?) : this(_message, null)
+    constructor(_cause: Throwable?) : this(null, _cause)
+}
+
+open class RuntimeException(message: String?, cause: Throwable?) : Exception(message, cause) {
+    constructor() : this(null, null)
+    constructor(message: String?) : this(message, null)
+    constructor(cause: Throwable?) : this(null, cause)
+}
+
+open class IllegalArgumentException(message: String?, cause: Throwable?) : RuntimeException(message, cause) {
+    constructor() : this(null, null)
+    constructor(message: String?) : this(message, null)
+    constructor(cause: Throwable?) : this(null, cause)
+}
+
+open class IllegalStateException(message: String?, cause: Throwable?) : RuntimeException(message, cause) {
+    constructor() : this(null, null)
+    constructor(message: String?) : this(message, null)
+    constructor(cause: Throwable?) : this(null, cause)
+}
+
+open class ClassCastException(message: String?, cause: Throwable?) : RuntimeException(message, cause) {
+    constructor() : this(null, null)
+    constructor(message: String?) : this(message, null)
+}
+
+open class NullPointerException(message: String?, cause: Throwable?) : RuntimeException(message, cause) {
+    constructor() : this(null, null)
+    constructor(message: String?) : this(message, null)
+}
+
+open class IndexOutOfBoundsException(message: String?, cause: Throwable?) : RuntimeException(message, cause) {
+    constructor() : this(null, null)
+    constructor(message: String?) : this(message, null)
+}
+
+open class AssertionError(message: String?, cause: Throwable?) : Exception(message, cause) {
+    constructor() : this(null, null)
+    constructor(message: Any?) : this(message?.toString(), message as? Throwable)
+
+}
+
+
+// TODO: fix function names to satisfy style convention (depends on built-in names)
+fun THROW_CCE() {
+    throw ClassCastException()
+}
+fun THROW_NPE() {
+    throw NullPointerException()
+}