1 /* 2 * Copyright (c) 2009, 2011, 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.java; 24 25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_15; 26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_10; 27 28 import org.graalvm.compiler.core.common.type.Stamp; 29 import org.graalvm.compiler.graph.NodeClass; 30 import org.graalvm.compiler.nodeinfo.NodeInfo; 31 import org.graalvm.compiler.nodeinfo.Verbosity; 32 import org.graalvm.compiler.nodes.FixedWithNextNode; 33 import org.graalvm.compiler.nodes.ValueNode; 34 import org.graalvm.compiler.nodes.spi.Lowerable; 35 import org.graalvm.compiler.nodes.spi.LoweringTool; 36 37 import jdk.vm.ci.meta.ResolvedJavaField; 38 39 /** 40 * The base class of all instructions that access fields. 41 */ 42 @NodeInfo(cycles = CYCLES_15, size = SIZE_10) 43 public abstract class AccessFieldNode extends FixedWithNextNode implements Lowerable { 44 45 public static final NodeClass<AccessFieldNode> TYPE = NodeClass.create(AccessFieldNode.class); 46 @OptionalInput ValueNode object; 47 48 protected final ResolvedJavaField field; 49 50 public ValueNode object() { 51 return object; 52 } 53 54 /** 55 * Constructs a new access field object. 56 * 57 * @param object the instruction producing the receiver object 58 * @param field the compiler interface representation of the field 59 */ 60 public AccessFieldNode(NodeClass<? extends AccessFieldNode> c, Stamp stamp, ValueNode object, ResolvedJavaField field) { 61 super(c, stamp); 62 this.object = object; 63 this.field = field; 64 assert field.getDeclaringClass().isInitialized(); 65 } 66 67 /** 68 * Gets the compiler interface field for this field access. 69 * 70 * @return the compiler interface field for this field access 71 */ 72 public ResolvedJavaField field() { 73 return field; 74 } 75 76 /** 77 * Checks whether this field access is an access to a static field. 78 * 79 * @return {@code true} if this field access is to a static field 80 */ 81 public boolean isStatic() { 82 return field.isStatic(); 83 } 84 85 /** 86 * Checks whether this field is declared volatile. 87 * 88 * @return {@code true} if the field is resolved and declared volatile 89 */ 90 public boolean isVolatile() { 91 return field.isVolatile(); 92 } 93 94 @Override 95 public void lower(LoweringTool tool) { 96 tool.getLowerer().lower(this, tool); 97 } 98 99 @Override 100 public String toString(Verbosity verbosity) { 101 if (verbosity == Verbosity.Name) { 102 return super.toString(verbosity) + "#" + field.getName(); 103 } else { 104 return super.toString(verbosity); 105 } 106 } 107 108 @Override 109 public boolean verify() { 110 assertTrue((object == null) == isStatic(), "static field must not have object, instance field must have object"); 111 return super.verify(); 112 } 113 }