1 /* 2 * Copyright (c) 2012, 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_0; 26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0; 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.nodes.FixedWithNextNode; 32 import org.graalvm.compiler.nodes.ValueNode; 33 import org.graalvm.compiler.nodes.spi.LIRLowerable; 34 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; 35 import org.graalvm.compiler.nodes.spi.ValueProxy; 36 37 @NodeInfo(cycles = CYCLES_0, size = SIZE_0) 38 public class FixedValueAnchorNode extends FixedWithNextNode implements LIRLowerable, ValueProxy, GuardingNode { 39 public static final NodeClass<FixedValueAnchorNode> TYPE = NodeClass.create(FixedValueAnchorNode.class); 40 41 @Input ValueNode object; 42 private Stamp predefinedStamp; 43 44 public ValueNode object() { 45 return object; 46 } 47 48 protected FixedValueAnchorNode(NodeClass<? extends FixedValueAnchorNode> c, ValueNode object) { 49 super(c, object.stamp()); 50 this.object = object; 51 } 52 53 public FixedValueAnchorNode(ValueNode object) { 54 this(TYPE, object); 55 } 56 57 public FixedValueAnchorNode(ValueNode object, Stamp predefinedStamp) { 58 super(TYPE, predefinedStamp); 59 this.object = object; 60 this.predefinedStamp = predefinedStamp; 61 } 62 63 @Override 64 public boolean inferStamp() { 65 if (predefinedStamp == null) { 66 return updateStamp(object.stamp()); 67 } else { 68 return false; 69 } 70 } 71 72 @NodeIntrinsic 73 public static native Object getObject(Object object); 74 75 @Override 76 public void generate(NodeLIRBuilderTool generator) { 77 generator.setResult(this, generator.operand(object)); 78 } 79 80 @Override 81 public ValueNode getOriginalNode() { 82 return object; 83 } 84 85 @Override 86 public GuardingNode getGuard() { 87 return this; 88 } 89 90 }