/*
 * Copyright (c) 2014, 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.
 */
package com.oracle.graal.replacements.nodes;

import com.oracle.graal.graph.*;
import com.oracle.graal.nodes.*;
import com.oracle.graal.nodes.extended.*;
import com.oracle.graal.nodes.spi.*;
import com.oracle.graal.nodes.type.*;

@NodeInfo(allowedUsageTypes = {InputType.Memory})
public class MemoryAnchorNode extends FixedWithNextNode implements LIRLowerable, MemoryNode {

    public MemoryAnchorNode() {
        super(StampFactory.forVoid());
    }

    public void generate(NodeLIRBuilderTool generator) {
        // Nothing to emit, since this node is used for structural purposes only.
    }

    public MemoryCheckpoint asMemoryCheckpoint() {
        return null;
    }

    public MemoryPhiNode asMemoryPhi() {
        return null;
    }
}

@@ -1119,24 +1119,61 @@
 al.graph.*;%0A
+import com.oracle.graal.graph.spi.*;%0A
 import com.o
@@ -1189,24 +1189,24 @@
 al.nodes.*;%0A
-
 import com.o
@@ -1452,16 +1452,33 @@
 moryNode
+, Canonicalizable
  %7B%0A%0A    
@@ -1604,24 +1604,24 @@
 enerator) %7B%0A
-
         // N
@@ -1689,32 +1689,154 @@
 es only.%0A    %7D%0A%0A
+    @Override%0A    public Node canonical(CanonicalizerTool tool) %7B%0A        return usages().isEmpty() ? null : this;%0A    %7D%0A%0A
     public Memor

remove unused MemoryAnchorNodes