--- /dev/null	2017-11-09 09:12:38.465827120 +0100
+++ new/test/hotspot/gtest/opto/test_mathexact.cpp	2018-01-16 14:03:22.648661117 +0100
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2018, 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.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "opto/mathexactnode.hpp"
+#include "unittest.hpp"
+
+TEST_VM(opto, mathexact) {
+  ASSERT_FALSE(OverflowMulLNode::is_overflow(1, 1));
+  ASSERT_FALSE(OverflowMulLNode::is_overflow(1, min_jlong));
+  ASSERT_TRUE(OverflowMulLNode::is_overflow(-1, min_jlong));
+  ASSERT_FALSE(OverflowMulLNode::is_overflow(-1, max_jlong));
+  ASSERT_TRUE(OverflowMulLNode::is_overflow(max_jlong / 2 + 1, 2));
+  ASSERT_FALSE(OverflowMulLNode::is_overflow(min_jlong, 0));
+  ASSERT_FALSE(OverflowMulLNode::is_overflow(min_jlong + 1, -1));
+  ASSERT_TRUE(OverflowMulLNode::is_overflow(min_jlong + 1, 2));
+}
+