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 }