1 /*
   2  * Copyright (c) 2014, 2016, 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 package org.graalvm.compiler.nodes.extended;
  24 
  25 import org.graalvm.compiler.core.common.LocationIdentity;
  26 import org.graalvm.compiler.graph.NodeClass;
  27 import org.graalvm.compiler.nodeinfo.NodeInfo;
  28 import org.graalvm.compiler.nodes.StateSplit;
  29 import org.graalvm.compiler.nodes.ValueNode;
  30 import org.graalvm.compiler.nodes.memory.AbstractWriteNode;
  31 import org.graalvm.compiler.nodes.memory.MemoryAccess;
  32 import org.graalvm.compiler.nodes.memory.MemoryCheckpoint;
  33 import org.graalvm.compiler.nodes.memory.address.AddressNode;
  34 import org.graalvm.compiler.nodes.spi.Lowerable;
  35 import org.graalvm.compiler.nodes.spi.LoweringTool;
  36 
  37 import jdk.vm.ci.meta.JavaKind;
  38 
  39 /**
  40  * Write a raw memory location according to Java field or array write semantics. It will perform
  41  * write barriers, implicit conversions and optionally oop compression.
  42  */
  43 @NodeInfo(nameTemplate = "JavaWrite#{p#location/s}")
  44 public final class JavaWriteNode extends AbstractWriteNode implements Lowerable, StateSplit, MemoryAccess, MemoryCheckpoint.Single {
  45 
  46     public static final NodeClass<JavaWriteNode> TYPE = NodeClass.create(JavaWriteNode.class);
  47     protected final JavaKind writeKind;
  48     protected final boolean compressible;
  49 
  50     public JavaWriteNode(JavaKind writeKind, AddressNode address, LocationIdentity location, ValueNode value, BarrierType barrierType, boolean compressible, boolean initialization) {
  51         super(TYPE, address, location, value, barrierType, initialization);
  52         this.writeKind = writeKind;
  53         this.compressible = compressible;
  54     }
  55 
  56     @Override
  57     public void lower(LoweringTool tool) {
  58         tool.getLowerer().lower(this, tool);
  59     }
  60 
  61     @Override
  62     public boolean canNullCheck() {
  63         return true;
  64     }
  65 
  66     public JavaKind getWriteKind() {
  67         return writeKind;
  68     }
  69 
  70     public boolean isCompressible() {
  71         return compressible;
  72     }
  73 }