--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.api.directives.test/src/org/graalvm/compiler/api/directives/test/OpaqueDirectiveTest.java	2017-02-15 16:56:28.088020322 -0800
@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2015, 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.api.directives.test;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import org.graalvm.compiler.api.directives.GraalDirectives;
+import org.graalvm.compiler.core.test.GraalCompilerTest;
+import org.graalvm.compiler.nodes.ConstantNode;
+import org.graalvm.compiler.nodes.ReturnNode;
+import org.graalvm.compiler.nodes.StructuredGraph;
+import org.graalvm.compiler.nodes.calc.AddNode;
+import org.graalvm.compiler.nodes.calc.ConditionalNode;
+
+/**
+ * Tests for {@link GraalDirectives#opaque}.
+ *
+ * There are two snippets for each kind:
+ * <ul>
+ * <li>opaque&lt;Kind&gt;Snippet verifies that constant folding is prevented by the opaque
+ * directive.
+ * <li>&lt;kind&gt;Snippet verifies that constant folding does happen if the opaque directive is not
+ * there.
+ * </ul>
+ *
+ */
+public class OpaqueDirectiveTest extends GraalCompilerTest {
+
+    @Retention(RetentionPolicy.RUNTIME)
+    @Target(ElementType.METHOD)
+    private @interface OpaqueSnippet {
+        Class<?> expectedReturnNode();
+    }
+
+    @OpaqueSnippet(expectedReturnNode = ConstantNode.class)
+    public static boolean booleanSnippet() {
+        return 5 > 3;
+    }
+
+    @OpaqueSnippet(expectedReturnNode = ConditionalNode.class)
+    public static boolean opaqueBooleanSnippet() {
+        return 5 > GraalDirectives.opaque(3);
+    }
+
+    @Test
+    public void testBoolean() {
+        test("booleanSnippet");
+        test("opaqueBooleanSnippet");
+    }
+
+    @OpaqueSnippet(expectedReturnNode = ConstantNode.class)
+    public static int intSnippet() {
+        return 5 + 3;
+    }
+
+    @OpaqueSnippet(expectedReturnNode = AddNode.class)
+    public static int opaqueIntSnippet() {
+        return 5 + GraalDirectives.opaque(3);
+    }
+
+    @Test
+    public void testInt() {
+        test("intSnippet");
+        test("opaqueIntSnippet");
+    }
+
+    @OpaqueSnippet(expectedReturnNode = ConstantNode.class)
+    public static double doubleSnippet() {
+        return 5. + 3.;
+    }
+
+    @OpaqueSnippet(expectedReturnNode = AddNode.class)
+    public static double opaqueDoubleSnippet() {
+        return 5. + GraalDirectives.opaque(3.);
+    }
+
+    @Test
+    public void testDouble() {
+        test("doubleSnippet");
+        test("opaqueDoubleSnippet");
+    }
+
+    private static class Dummy {
+    }
+
+    @OpaqueSnippet(expectedReturnNode = ConstantNode.class)
+    public static boolean objectSnippet() {
+        Object obj = new Dummy();
+        return obj == null;
+    }
+
+    @OpaqueSnippet(expectedReturnNode = ConditionalNode.class)
+    public static boolean opaqueObjectSnippet() {
+        Object obj = new Dummy();
+        return GraalDirectives.opaque(obj) == null;
+    }
+
+    @Test
+    public void testObject() {
+        test("objectSnippet");
+        test("opaqueObjectSnippet");
+    }
+
+    @Override
+    protected boolean checkLowTierGraph(StructuredGraph graph) {
+        OpaqueSnippet snippet = graph.method().getAnnotation(OpaqueSnippet.class);
+        for (ReturnNode returnNode : graph.getNodes(ReturnNode.TYPE)) {
+            Assert.assertEquals(snippet.expectedReturnNode(), returnNode.result().getClass());
+        }
+        return true;
+    }
+}