1 /*
   2  * Copyright (c) 2013, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 package org.graalvm.compiler.hotspot.gc.g1;
  26 
  27 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_64;
  28 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_64;
  29 
  30 import org.graalvm.compiler.graph.NodeClass;
  31 import org.graalvm.compiler.hotspot.gc.shared.ObjectWriteBarrier;
  32 import org.graalvm.compiler.nodeinfo.NodeInfo;
  33 import org.graalvm.compiler.nodes.ValueNode;
  34 import org.graalvm.compiler.nodes.memory.address.AddressNode;
  35 
  36 @NodeInfo(cycles = CYCLES_64, size = SIZE_64)
  37 public class G1PostWriteBarrier extends ObjectWriteBarrier {
  38 
  39     public static final NodeClass<G1PostWriteBarrier> TYPE = NodeClass.create(G1PostWriteBarrier.class);
  40     protected final boolean alwaysNull;
  41 
  42     public G1PostWriteBarrier(AddressNode address, ValueNode value, boolean precise, boolean alwaysNull) {
  43         this(TYPE, address, value, precise, alwaysNull);
  44     }
  45 
  46     private G1PostWriteBarrier(NodeClass<? extends G1PostWriteBarrier> c, AddressNode address, ValueNode value, boolean precise, boolean alwaysNull) {
  47         super(c, address, value, precise);
  48         this.alwaysNull = alwaysNull;
  49     }
  50 
  51     public boolean alwaysNull() {
  52         return alwaysNull;
  53     }
  54 }