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 24 25 package org.graalvm.compiler.nodes.extended; 26 27 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2; 28 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_2; 29 30 import org.graalvm.compiler.core.common.type.StampFactory; 31 import org.graalvm.compiler.graph.NodeClass; 32 import org.graalvm.compiler.graph.spi.Canonicalizable; 33 import org.graalvm.compiler.graph.spi.CanonicalizerTool; 34 import org.graalvm.compiler.nodeinfo.NodeInfo; 35 import org.graalvm.compiler.nodes.ConstantNode; 36 import org.graalvm.compiler.nodes.FixedWithNextNode; 37 import org.graalvm.compiler.nodes.ValueNode; 38 import org.graalvm.compiler.nodes.spi.Lowerable; 39 import org.graalvm.compiler.nodes.spi.LoweringTool; 40 import org.graalvm.compiler.nodes.spi.Virtualizable; 41 import org.graalvm.compiler.nodes.spi.VirtualizerTool; 42 import org.graalvm.compiler.nodes.type.StampTool; 43 import org.graalvm.compiler.nodes.virtual.VirtualObjectNode; 44 45 import jdk.vm.ci.meta.ConstantReflectionProvider; 46 import jdk.vm.ci.meta.JavaConstant; 47 import jdk.vm.ci.meta.JavaKind; 48 import jdk.vm.ci.meta.MetaAccessProvider; 49 import jdk.vm.ci.meta.ResolvedJavaType; 50 51 @NodeInfo(cycles = CYCLES_2, size = SIZE_2) 52 public final class UnboxNode extends FixedWithNextNode implements Virtualizable, Lowerable, Canonicalizable.Unary<ValueNode> { 53 54 public static final NodeClass<UnboxNode> TYPE = NodeClass.create(UnboxNode.class); 55 @Input protected ValueNode value; 56 protected final JavaKind boxingKind; 57 58 @Override 59 public ValueNode getValue() { 60 return value; 61 } 62 63 public UnboxNode(ValueNode value, JavaKind boxingKind) { 64 super(TYPE, StampFactory.forKind(boxingKind.getStackKind())); 65 this.value = value; 66 this.boxingKind = boxingKind; 67 } 68 69 public static ValueNode create(MetaAccessProvider metaAccess, ConstantReflectionProvider constantReflection, ValueNode value, JavaKind boxingKind) { 70 ValueNode synonym = findSynonym(metaAccess, constantReflection, value, boxingKind); 71 if (synonym != null) { 72 return synonym; 73 } 74 return new UnboxNode(value, boxingKind); 75 } 76 77 public JavaKind getBoxingKind() { 78 return boxingKind; 79 } 80 81 @Override 82 public void lower(LoweringTool tool) { 83 tool.getLowerer().lower(this, tool); 84 } 85 86 @Override 87 public void virtualize(VirtualizerTool tool) { 88 ValueNode alias = tool.getAlias(getValue()); 89 if (alias instanceof VirtualObjectNode) { 90 VirtualObjectNode virtual = (VirtualObjectNode) alias; 91 ResolvedJavaType objectType = virtual.type(); 92 ResolvedJavaType expectedType = tool.getMetaAccess().lookupJavaType(boxingKind.toBoxedJavaClass()); 93 if (objectType.equals(expectedType)) { 94 tool.replaceWithValue(tool.getEntry(virtual, 0)); 95 } 96 } 97 } 98 99 @Override 100 public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) { 101 if (tool.allUsagesAvailable() && hasNoUsages() && StampTool.isPointerNonNull(forValue)) { 102 return null; 103 } 104 ValueNode synonym = findSynonym(tool.getMetaAccess(), tool.getConstantReflection(), forValue, boxingKind); 105 if (synonym != null) { 106 return synonym; 107 } 108 return this; 109 } 110 111 private static ValueNode findSynonym(MetaAccessProvider metaAccess, ConstantReflectionProvider constantReflection, ValueNode forValue, JavaKind boxingKind) { 112 if (forValue.isConstant()) { 113 JavaConstant constant = forValue.asJavaConstant(); 114 JavaConstant unboxed = constantReflection.unboxPrimitive(constant); 115 if (unboxed != null && unboxed.getJavaKind() == boxingKind) { 116 return ConstantNode.forConstant(unboxed, metaAccess); 117 } 118 } else if (forValue instanceof BoxNode) { 119 BoxNode box = (BoxNode) forValue; 120 if (boxingKind == box.getBoxingKind()) { 121 return box.getValue(); 122 } 123 } 124 return null; 125 } 126 }