--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/compiler/c2/Test6973329.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2010, 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 6973329
+ * @summary C2 with Zero based COOP produces code with broken anti-dependency on x86
+ *
+ * @run main/othervm -Xbatch -Xcomp
+ *    -XX:CompileCommand=compileonly,compiler.c2.Test6973329::*
+ *    compiler.c2.Test6973329
+ */
+
+package compiler.c2;
+
+public class Test6973329 {
+    static class A {
+        A next;
+        int n;
+
+        public int get_n() {
+            return n + 1;
+        }
+    }
+
+    A a;
+
+    void test(A new_next) {
+        A prev_next = a.next;
+        a.next = new_next;
+        if (prev_next == null) {
+            a.n = a.get_n();
+        }
+    }
+
+    public static void main(String args[]) {
+        Test6973329 t = new Test6973329();
+        t.a = new A();
+        t.a.n = 1;
+        t.test(new A());
+        if (t.a.n != 2) {
+            System.out.println("Wrong value: " + t.a.n + " expected: 2");
+            System.exit(97);
+        }
+    }
+}
+