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 */ 23package org.graalvm.compiler.nodes.debug; 24 25import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_UNKNOWN; 26import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_UNKNOWN; 27 28import org.graalvm.compiler.core.common.type.StampFactory; 29import org.graalvm.compiler.graph.NodeClass; 30import org.graalvm.compiler.nodeinfo.NodeInfo; 31import org.graalvm.compiler.nodes.FixedWithNextNode; 32import org.graalvm.compiler.nodes.ValueNode; 33import org.graalvm.compiler.nodes.spi.LIRLowerable; 34import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; 35 36@NodeInfo(cycles = CYCLES_UNKNOWN, cyclesRationale = "Node is literally a blackhole", size = SIZE_UNKNOWN) 37public final class BlackholeNode extends FixedWithNextNode implements LIRLowerable { 38 39 public static final NodeClass<BlackholeNode> TYPE = NodeClass.create(BlackholeNode.class); 40 @Input ValueNode value; 41 42 public BlackholeNode(ValueNode value) { 43 super(TYPE, StampFactory.forVoid()); 44 this.value = value; 45 } 46 47 @Override 48 public void generate(NodeLIRBuilderTool gen) { 49 gen.getLIRGeneratorTool().emitBlackhole(gen.operand(value)); 50 } 51} 52