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 25 package org.graalvm.compiler.nodes.extended; 26 27 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0; 28 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0; 29 30 import org.graalvm.compiler.graph.NodeClass; 31 import org.graalvm.compiler.nodeinfo.NodeInfo; 32 import org.graalvm.compiler.nodes.NodeView; 33 import org.graalvm.compiler.nodes.ValueNode; 34 import org.graalvm.compiler.nodes.calc.FloatingNode; 35 import org.graalvm.compiler.nodes.spi.LIRLowerable; 36 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; 37 38 @NodeInfo(cycles = CYCLES_0, size = SIZE_0) 39 public final class OpaqueNode extends FloatingNode implements LIRLowerable { 40 public static final NodeClass<OpaqueNode> TYPE = NodeClass.create(OpaqueNode.class); 41 42 @Input protected ValueNode value; 43 protected Object noGVN = new Object(); 44 45 public OpaqueNode(ValueNode value) { 46 super(TYPE, value.stamp(NodeView.DEFAULT).unrestricted()); 47 this.value = value; 48 } 49 50 public ValueNode getValue() { 51 return value; 52 } 53 54 public void setValue(ValueNode value) { 55 this.updateUsages(this.value, value); 56 this.value = value; 57 } 58 59 public void remove() { 60 replaceAndDelete(getValue()); 61 } 62 63 @Override 64 public void generate(NodeLIRBuilderTool gen) { 65 gen.setResult(this, gen.operand(value)); 66 } 67 }