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 final 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 public FixedValueAnchorNode(ValueNode object) { 49 super(TYPE, object.stamp()); 50 this.object = object; 51 } 52 53 public FixedValueAnchorNode(ValueNode object, Stamp predefinedStamp) { 54 super(TYPE, predefinedStamp); 55 this.object = object; 56 this.predefinedStamp = predefinedStamp; 57 } 58 59 @Override 60 public boolean inferStamp() { 61 if (predefinedStamp == null) { 62 return updateStamp(object.stamp()); 63 } else { 64 return false; 65 } 66 } 67 68 @NodeIntrinsic 69 public static native Object getObject(Object object); 70 71 @Override 72 public void generate(NodeLIRBuilderTool generator) { 73 generator.setResult(this, generator.operand(object)); 74 } 75 76 @Override 77 public ValueNode getOriginalNode() { 78 return object; 79 } 80 81 @Override 82 public GuardingNode getGuard() { 83 return this; 84 } 85 86 }