1 /* 2 * Copyright (c) 2011, 2016, 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.InputType.Memory; 26 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_20; 27 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_2; 28 29 import org.graalvm.compiler.core.common.LocationIdentity; 30 import org.graalvm.compiler.core.common.type.StampFactory; 31 import org.graalvm.compiler.graph.NodeClass; 32 import org.graalvm.compiler.nodeinfo.NodeInfo; 33 import org.graalvm.compiler.nodes.FixedWithNextNode; 34 import org.graalvm.compiler.nodes.memory.MemoryCheckpoint; 35 import org.graalvm.compiler.nodes.spi.LIRLowerable; 36 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; 37 38 /** 39 * Creates a memory barrier. 40 */ 41 @NodeInfo(nameTemplate = "Membar#{p#location/s}", allowedUsageTypes = Memory, cycles = CYCLES_20, size = SIZE_2) 42 public final class MembarNode extends FixedWithNextNode implements LIRLowerable, MemoryCheckpoint.Single { 43 44 public static final NodeClass<MembarNode> TYPE = NodeClass.create(MembarNode.class); 45 protected final int barriers; 46 protected final LocationIdentity location; 47 48 public MembarNode(int barriers) { 49 this(barriers, LocationIdentity.any()); 50 } 51 52 public MembarNode(int barriers, LocationIdentity location) { 53 super(TYPE, StampFactory.forVoid()); 54 this.barriers = barriers; 55 this.location = location; 56 } 57 58 @Override 59 public LocationIdentity getLocationIdentity() { 60 return location; 61 } 62 63 @Override 64 public void generate(NodeLIRBuilderTool generator) { 65 generator.getLIRGeneratorTool().emitMembar(barriers); 66 } 67 68 @NodeIntrinsic 69 public static native void memoryBarrier(@ConstantNodeParameter int barriers); 70 71 @NodeIntrinsic 72 public static native void memoryBarrier(@ConstantNodeParameter int barriers, @ConstantNodeParameter LocationIdentity location); 73 }