1 /*
   2  * Copyright (c) 2011, 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.memory;
  24 
  25 import org.graalvm.compiler.core.common.LIRKind;
  26 import org.graalvm.compiler.core.common.type.Stamp;
  27 import org.graalvm.compiler.graph.NodeClass;
  28 import org.graalvm.compiler.nodeinfo.NodeInfo;
  29 import org.graalvm.compiler.nodes.ValueNode;
  30 import org.graalvm.compiler.nodes.memory.address.AddressNode;
  31 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
  32 import org.graalvm.word.LocationIdentity;
  33 
  34 /**
  35  * Writes a given {@linkplain #value() value} a {@linkplain FixedAccessNode memory location}.
  36  */
  37 @NodeInfo(nameTemplate = "Write#{p#location/s}")
  38 public class WriteNode extends AbstractWriteNode implements LIRLowerableAccess {
  39 
  40     public static final NodeClass<WriteNode> TYPE = NodeClass.create(WriteNode.class);
  41 
  42     public WriteNode(AddressNode address, LocationIdentity location, ValueNode value, BarrierType barrierType) {
  43         super(TYPE, address, location, value, barrierType);
  44     }
  45 
  46     protected WriteNode(NodeClass<? extends WriteNode> c, AddressNode address, LocationIdentity location, ValueNode value, BarrierType barrierType) {
  47         super(c, address, location, value, barrierType);
  48     }
  49 
  50     @Override
  51     public void generate(NodeLIRBuilderTool gen) {
  52         LIRKind writeKind = gen.getLIRGeneratorTool().getLIRKind(value().stamp());
  53         gen.getLIRGeneratorTool().getArithmetic().emitStore(writeKind, gen.operand(address), gen.operand(value()), gen.state(this));
  54     }
  55 
  56     @Override
  57     public boolean canNullCheck() {
  58         return true;
  59     }
  60 
  61     @Override
  62     public Stamp getAccessStamp() {
  63         return value().stamp();
  64     }
  65 }