--- /dev/null	2016-05-31 09:42:47.975716356 -0700
+++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.core.common/src/org/graalvm/compiler/core/common/util/ModuleAPI.java	2016-12-09 00:47:19.707600702 -0800
@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2016, 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.core.common.util;
+
+import static org.graalvm.compiler.core.common.util.Util.JAVA_SPECIFICATION_VERSION;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+
+/**
+ * Reflection based access to the Module API introduced by JDK 9. This allows the API to be used in
+ * code that must be compiled on a JDK prior to 9. Use of this class must be guarded by a test for
+ * JDK 9 or later. For example:
+ *
+ * <pre>
+ * if (Util.JAVA_SPECIFICATION_VERSION >= 9) {
+ *     // Use of ModuleAPI
+ * }
+ * </pre>
+ */
+public final class ModuleAPI {
+
+    private ModuleAPI(Method method) {
+        this.method = method;
+    }
+
+    private final Method method;
+
+    /**
+     * {@code Class.getModule()}.
+     */
+    public static final ModuleAPI getModule;
+
+    /**
+     * {@code jdk.internal.module.Modules.addExports(Module, String, Module)}.
+     */
+    public static final ModuleAPI addExports;
+
+    /**
+     * {@code java.lang.reflect.Module.getResourceAsStream(String)}.
+     */
+    public static final ModuleAPI getResourceAsStream;
+
+    /**
+     * {@code java.lang.reflect.Module.canRead(Module)}.
+     */
+    public static final ModuleAPI canRead;
+
+    /**
+     * {@code java.lang.reflect.Module.isExported(String)}.
+     */
+    public static final ModuleAPI isExported;
+
+    /**
+     * {@code java.lang.reflect.Module.isExported(String, Module)}.
+     */
+    public static final ModuleAPI isExportedTo;
+
+    /**
+     * Invokes the static Module API method represented by this object.
+     */
+    @SuppressWarnings("unchecked")
+    public <T> T invokeStatic(Object... args) {
+        checkAvailability();
+        assert Modifier.isStatic(method.getModifiers());
+        try {
+            return (T) method.invoke(null, args);
+        } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
+            throw new InternalError(e);
+        }
+    }
+
+    /**
+     * Invokes the non-static Module API method represented by this object.
+     */
+    @SuppressWarnings("unchecked")
+    public <T> T invoke(Object receiver, Object... args) {
+        checkAvailability();
+        assert !Modifier.isStatic(method.getModifiers());
+        try {
+            return (T) method.invoke(receiver, args);
+        } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
+            throw new InternalError(e);
+        }
+    }
+
+    private void checkAvailability() throws InternalError {
+        if (method == null) {
+            throw new InternalError("Cannot use Module API on JDK " + JAVA_SPECIFICATION_VERSION);
+        }
+    }
+
+    static {
+        if (JAVA_SPECIFICATION_VERSION >= 9) {
+            try {
+                getModule = new ModuleAPI(Class.class.getMethod("getModule"));
+                Class<?> moduleClass = getModule.method.getReturnType();
+                Class<?> modulesClass = Class.forName("jdk.internal.module.Modules");
+                getResourceAsStream = new ModuleAPI(moduleClass.getMethod("getResourceAsStream", String.class));
+                canRead = new ModuleAPI(moduleClass.getMethod("canRead", moduleClass));
+                isExported = new ModuleAPI(moduleClass.getMethod("isExported", String.class));
+                isExportedTo = new ModuleAPI(moduleClass.getMethod("isExported", String.class, moduleClass));
+                addExports = new ModuleAPI(modulesClass.getDeclaredMethod("addExports", moduleClass, String.class, moduleClass));
+            } catch (NoSuchMethodException | SecurityException | ClassNotFoundException e) {
+                throw new InternalError(e);
+            }
+        } else {
+            ModuleAPI unavailable = new ModuleAPI(null);
+            getModule = unavailable;
+            getResourceAsStream = unavailable;
+            canRead = unavailable;
+            isExported = unavailable;
+            isExportedTo = unavailable;
+            addExports = unavailable;
+        }
+
+    }
+}