--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/compiler/c2/Test6636138_2.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2009, 2013, 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 6636138
+ * @summary SuperWord::co_locate_pack(Node_List* p) generates memory graph that leads to memory order violation.
+ *
+ * @run main/othervm -Xbatch
+ *      -XX:CompileCommand=compileonly,compiler.c2.Test6636138_2::shift
+ *      compiler.c2.Test6636138_2
+ */
+
+package compiler.c2;
+
+public class Test6636138_2 {
+
+    public static void init(int src[]) {
+        // Initialize the array
+        for (int i = 0; i < src.length; i++)
+            src[i] = i;
+    }
+
+    public static void shift(int src[]) {
+        //left-shift the array
+        for (int i = src.length - 1; i > 0; i--) {
+            int tmp = src[i];
+            src[i] = src[i - 1];
+            src[i - 1] = tmp;
+        }
+    }
+
+    public static void verify(int src[]) {
+        for (int i = 0; i < src.length; i++) {
+            int value = (i - 1 + src.length) % src.length; // correct value after shifting
+            if (src[i] != value) {
+                System.out.println("Error: src[" + i + "] should be " + value + " instead of " + src[i]);
+                System.exit(97);
+            }
+        }
+    }
+
+    public static void test() {
+        int[] src = new int[10];
+        init(src);
+        shift(src);
+        verify(src);
+    }
+
+    public static void main(String[] args) {
+        for (int i = 0; i < 2000; i++)
+            test();
+    }
+}
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