--- /dev/null	2016-05-31 09:42:47.975716356 -0700
+++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.jtt/src/org/graalvm/compiler/jtt/bytecode/BC_instanceof01.java	2016-12-07 13:51:39.333153268 -0800
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package org.graalvm.compiler.jtt.bytecode;
+
+import org.junit.Test;
+
+import org.graalvm.compiler.core.phases.HighTier;
+import org.graalvm.compiler.jtt.JTTTest;
+import org.graalvm.compiler.options.OptionValue;
+import org.graalvm.compiler.options.OptionValue.OverrideScope;
+import org.graalvm.compiler.phases.tiers.Suites;
+
+/**
+ * Tests the instanceof works, when casting an array of interface.
+ */
+public class BC_instanceof01 extends JTTTest {
+
+    public interface IObject {
+
+    }
+
+    public interface IDerivedObject extends IObject {
+
+    }
+
+    private static class BaseClass {
+
+    }
+
+    private static class TestClass extends BaseClass implements IObject {
+    }
+
+    private static class DerivedTestClass extends BaseClass implements IDerivedObject {
+
+    }
+
+    static TestClass[] a1 = {new TestClass()};
+    static DerivedTestClass[] a2 = {new DerivedTestClass()};
+
+    public static BaseClass[] getBaseClassArray() {
+        return a1;
+    }
+
+    public static BaseClass[] getDerivedBaseClassArray() {
+        return a2;
+    }
+
+    public static boolean test() {
+        return getBaseClassArray() instanceof IObject[];
+    }
+
+    public static int testConditionalElimination() {
+        BaseClass[] result = getDerivedBaseClassArray();
+        if (result instanceof IDerivedObject[]) {
+            if (result instanceof IObject[]) {
+                return 1;
+            } else {
+                return 2;
+            }
+        } else {
+            return 3;
+        }
+    }
+
+    @Test
+    public void run0() throws Throwable {
+        runTest("test");
+    }
+
+    @Override
+    @SuppressWarnings("try")
+    protected Suites getSuites() {
+        try (OverrideScope scope = OptionValue.override(HighTier.Options.Inline, false)) {
+            return super.getSuites();
+        }
+    }
+
+    @Test
+    public void run1() throws Throwable {
+        runTest("testConditionalElimination");
+    }
+}