--- /dev/null	2017-04-21 15:40:19.245407008 +0200
+++ new/test/compiler/arraycopy/TestACSameSrcDst.java	2017-05-16 14:14:46.066942567 +0200
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2017, Red Hat, Inc. 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 8179678
+ * @summary ArrayCopy with same src and dst can cause incorrect execution or compiler crash
+ *
+ * @run main/othervm TestACSameSrcDst
+ *
+ */
+
+public class TestACSameSrcDst {
+
+    static int test1(int[] src, int[] dst) {
+        System.arraycopy(src, 5, dst, 0, 10);
+         // this shouldn't be transformed to src[5] because the copy
+         // can modify src[5] if src and dst are the same.
+        return dst[0];
+    }
+    static int test2(int[] src) {
+        System.arraycopy(src, 0, src, 0, 10);
+        // same source and destination. If load from destination is
+        // transformed to load of source, the compiler performs that
+        // optimization in an infinite loop.
+        return src[0];
+    }
+
+    public static void main(String[] args) {
+        int[] array = new int[15];
+        for (int i = 0; i < 20000; i++) {
+            for (int j = 0; j < array.length; j++) {
+                array[j] = j;
+            }
+            int expected = array[5];
+            int res = test1(array, array);
+            if (res != expected) {
+                throw new RuntimeException("bad result: " + res + " != " + expected);
+            }
+            test2(array);
+        }
+    }
+}