1 /* 2 * Copyright (c) 2013, 2015, 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 static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_20; 26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_20; 27 28 import java.util.Collections; 29 30 import org.graalvm.compiler.core.common.type.StampFactory; 31 import org.graalvm.compiler.core.common.type.TypeReference; 32 import org.graalvm.compiler.graph.NodeClass; 33 import org.graalvm.compiler.graph.spi.Canonicalizable; 34 import org.graalvm.compiler.graph.spi.CanonicalizerTool; 35 import org.graalvm.compiler.nodeinfo.NodeInfo; 36 import org.graalvm.compiler.nodes.FixedWithNextNode; 37 import org.graalvm.compiler.nodes.ValueNode; 38 import org.graalvm.compiler.nodes.java.MonitorIdNode; 39 import org.graalvm.compiler.nodes.spi.Lowerable; 40 import org.graalvm.compiler.nodes.spi.LoweringTool; 41 import org.graalvm.compiler.nodes.spi.VirtualizableAllocation; 42 import org.graalvm.compiler.nodes.spi.VirtualizerTool; 43 import org.graalvm.compiler.nodes.type.StampTool; 44 import org.graalvm.compiler.nodes.virtual.VirtualBoxingNode; 45 46 import jdk.vm.ci.meta.JavaKind; 47 import jdk.vm.ci.meta.ResolvedJavaType; 48 49 /** 50 * This node represents the boxing of a primitive value. This corresponds to a call to the valueOf 51 * methods in Integer, Long, etc. 52 */ 53 @NodeInfo(cycles = CYCLES_20, size = SIZE_20) 54 public class BoxNode extends FixedWithNextNode implements VirtualizableAllocation, Lowerable, Canonicalizable.Unary<ValueNode> { 55 56 public static final NodeClass<BoxNode> TYPE = NodeClass.create(BoxNode.class); 57 @Input private ValueNode value; 58 protected final JavaKind boxingKind; 59 60 public BoxNode(ValueNode value, ResolvedJavaType resultType, JavaKind boxingKind) { 61 this(TYPE, value, resultType, boxingKind); 62 } 63 64 public BoxNode(NodeClass<? extends BoxNode> c, ValueNode value, ResolvedJavaType resultType, JavaKind boxingKind) { 65 super(c, StampFactory.objectNonNull(TypeReference.createExactTrusted(resultType))); 66 this.value = value; 67 this.boxingKind = boxingKind; 68 } 69 70 public JavaKind getBoxingKind() { 71 return boxingKind; 72 } 73 74 @Override 75 public ValueNode getValue() { 76 return value; 77 } 78 79 @Override 80 public void lower(LoweringTool tool) { 81 tool.getLowerer().lower(this, tool); 82 } 83 84 @Override 85 public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) { 86 if (tool.allUsagesAvailable() && hasNoUsages()) { 87 return null; 88 } 89 return this; 90 } 91 92 protected VirtualBoxingNode createVirtualBoxingNode() { 93 return new VirtualBoxingNode(StampTool.typeOrNull(stamp()), boxingKind); 94 } 95 96 @Override 97 public void virtualize(VirtualizerTool tool) { 98 ValueNode alias = tool.getAlias(getValue()); 99 100 VirtualBoxingNode newVirtual = createVirtualBoxingNode(); 101 assert newVirtual.getFields().length == 1; 102 103 tool.createVirtualObject(newVirtual, new ValueNode[]{alias}, Collections.<MonitorIdNode> emptyList(), false); 104 tool.replaceWithVirtual(newVirtual); 105 } 106 }