diff -r 2e038ad0c1d0 -r f1d6640088a1 test/compiler/6796786/Test6796786.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/compiler/6796786/Test6796786.java	Tue May 03 12:11:54 2011 -0700
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2011, 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.
+ *
+ */
+
+/**
+ * @test
+ * @bug 6796786
+ * @summary invalid FP identity transform - (a - b) -> b - a
+ *
+ * @run main Test6796786
+ */
+
+public class Test6796786 {
+    static volatile float d1;
+    static volatile float d2;
+    static float zero;
+
+    public static void main(String[] args) {
+        int total = 0;
+        for (int i = 0; i < 100000; i++) {
+            if (Float.floatToRawIntBits(- (d1 - d1)) == Float.floatToRawIntBits(0.0f)) {
+                total++;
+            }
+        }
+        if (total != 100000) {
+            throw new InternalError();
+        }
+    }
+}