1 /* 2 * Copyright (c) 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; 26 27 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_IGNORED; 28 29 import org.graalvm.compiler.core.common.type.StampFactory; 30 import org.graalvm.compiler.graph.NodeClass; 31 import org.graalvm.compiler.nodeinfo.NodeInfo; 32 import org.graalvm.compiler.nodeinfo.NodeSize; 33 import org.graalvm.compiler.nodes.spi.LIRLowerable; 34 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; 35 36 /** A node that results in a platform dependent pause instruction being emitted. */ 37 // @formatter:off 38 @NodeInfo(cycles = CYCLES_IGNORED, 39 size = NodeSize.SIZE_1) 40 // @formatter:on 41 public final class PauseNode extends FixedWithNextNode implements LIRLowerable { 42 43 public static final NodeClass<PauseNode> TYPE = NodeClass.create(PauseNode.class); 44 PauseNode()45 public PauseNode() { 46 super(TYPE, StampFactory.forVoid()); 47 } 48 49 @Override generate(NodeLIRBuilderTool gen)50 public void generate(NodeLIRBuilderTool gen) { 51 gen.getLIRGeneratorTool().emitPause(); 52 } 53 54 @NodeIntrinsic pause()55 public static native void pause(); 56 } 57