1 /* 2 * Copyright (c) 2015, 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 package org.graalvm.compiler.core.amd64; 25 26 import org.graalvm.compiler.asm.amd64.AMD64Address.Scale; 27 import org.graalvm.compiler.core.common.LIRKind; 28 import org.graalvm.compiler.graph.NodeClass; 29 import org.graalvm.compiler.lir.amd64.AMD64AddressValue; 30 import org.graalvm.compiler.lir.gen.LIRGeneratorTool; 31 import org.graalvm.compiler.nodeinfo.NodeInfo; 32 import org.graalvm.compiler.nodes.ValueNode; 33 import org.graalvm.compiler.nodes.memory.address.AddressNode; 34 import org.graalvm.compiler.nodes.spi.LIRLowerable; 35 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; 36 37 import jdk.vm.ci.meta.AllocatableValue; 38 import jdk.vm.ci.meta.Value; 39 40 /** 41 * Represents an address of the form [base + index*scale + displacement]. Both base and index are 42 * optional. 43 */ 44 @NodeInfo 45 public class AMD64AddressNode extends AddressNode implements LIRLowerable { 46 47 public static final NodeClass<AMD64AddressNode> TYPE = NodeClass.create(AMD64AddressNode.class); 48 49 @OptionalInput private ValueNode base; 50 51 @OptionalInput private ValueNode index; 52 private Scale scale; 53 54 private int displacement; 55 56 public AMD64AddressNode(ValueNode base) { 57 this(base, null); 58 } 59 60 public AMD64AddressNode(ValueNode base, ValueNode index) { 61 super(TYPE); 62 this.base = base; 63 this.index = index; 64 this.scale = Scale.Times1; 65 } 66 67 @Override 68 public void generate(NodeLIRBuilderTool gen) { 69 LIRGeneratorTool tool = gen.getLIRGeneratorTool(); 70 71 AllocatableValue baseValue = base == null ? Value.ILLEGAL : tool.asAllocatable(gen.operand(base)); 72 AllocatableValue indexValue = index == null ? Value.ILLEGAL : tool.asAllocatable(gen.operand(index)); 73 74 AllocatableValue baseReference = LIRKind.derivedBaseFromValue(baseValue); 75 AllocatableValue indexReference; 76 if (index == null) { 77 indexReference = null; 78 } else if (scale.equals(Scale.Times1)) { 79 indexReference = LIRKind.derivedBaseFromValue(indexValue); 80 } else { 81 if (LIRKind.isValue(indexValue)) { 82 indexReference = null; 83 } else { 84 indexReference = Value.ILLEGAL; 85 } 86 } 87 88 LIRKind kind = LIRKind.combineDerived(tool.getLIRKind(stamp()), baseReference, indexReference); 89 gen.setResult(this, new AMD64AddressValue(kind, baseValue, indexValue, scale, displacement)); 90 } 91 92 @Override 93 public ValueNode getBase() { 94 return base; 95 } 96 97 public void setBase(ValueNode base) { 98 // allow modification before inserting into the graph 99 if (isAlive()) { 100 updateUsages(this.base, base); 101 } 102 this.base = base; 103 } 104 105 @Override 106 public ValueNode getIndex() { 107 return index; 108 } 109 110 public void setIndex(ValueNode index) { 111 // allow modification before inserting into the graph 112 if (isAlive()) { 113 updateUsages(this.index, index); 114 } 115 this.index = index; 116 } 117 118 public Scale getScale() { 119 return scale; 120 } 121 122 public void setScale(Scale scale) { 123 this.scale = scale; 124 } 125 126 public int getDisplacement() { 127 return displacement; 128 } 129 130 public void setDisplacement(int displacement) { 131 this.displacement = displacement; 132 } 133 134 @Override 135 public long getMaxConstantDisplacement() { 136 return displacement; 137 } 138 }