--- a/src/cpu/x86/vm/x86_64.ad	Fri Apr 19 10:09:11 2013 -0700
+++ b/src/cpu/x86/vm/x86_64.ad	Tue Apr 16 17:06:39 2013 +0200
@@ -2222,12 +2222,6 @@
     $$$emit32$src$$constant;
   %}
 
-  enc_class Con64(immL src)
-  %{
-    // Output immediate
-    emit_d64($src$$constant);
-  %}
-
   enc_class Con32F_as_bits(immF src)
   %{
     // Output Float immediate bits
@@ -7608,7 +7602,7 @@
   ins_pipe( pipe_cmpxchg );
 %}
 
-instruct xaddL_no_res( memory mem, Universe dummy, immL add, rFlagsReg cr) %{
+instruct xaddL_no_res( memory mem, Universe dummy, immL32 add, rFlagsReg cr) %{
   predicate(n->as_LoadStore()->result_not_used());
   match(Set dummy (GetAndAddL mem add));
   effect(KILL cr);

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/compiler/8011901/Test8011901.java	Tue Apr 16 17:06:39 2013 +0200
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 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 8011901
+ * @summary instruct xaddL_no_res shouldn't allow 64 bit constants.
+ * @run main/othervm -XX:-BackgroundCompilation Test8011901
+ *
+ */
+
+import java.lang.reflect.*;
+import sun.misc.*;
+
+public class Test8011901 {
+
+    private long ctl;
+
+    private static final sun.misc.Unsafe U;
+    private static final long CTL;
+
+    static {
+        try {
+            Field unsafe = sun.misc.Unsafe.class.getDeclaredField("theUnsafe");
+            unsafe.setAccessible(true);
+            U = (sun.misc.Unsafe) unsafe.get(null);
+            CTL = U.objectFieldOffset(Test8011901.class.getDeclaredField("ctl"));
+        } catch (Exception e) {
+            throw new Error(e);
+        }
+    }
+
+    public static void main(String[] args) {
+        for(int c = 0; c < 20000; c++) {
+            new Test8011901().makeTest();
+        }
+        System.out.println("Test Passed");
+    }
+
+    public static final long EXPECTED = 1L << 42;
+
+    public void makeTest() {
+        U.getAndAddLong(this, CTL, EXPECTED);
+        if (ctl != EXPECTED) {
+            throw new RuntimeException("Test failed. Expected: " + EXPECTED + ", but got = " + ctl);
+        }
+    }
+}