1 /* 2 * Copyright (c) 2009, 2019, 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.java; 26 27 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_8; 28 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_8; 29 30 import org.graalvm.compiler.core.common.type.Stamp; 31 import org.graalvm.compiler.graph.NodeClass; 32 import org.graalvm.compiler.nodeinfo.NodeInfo; 33 import org.graalvm.compiler.nodes.DeoptimizingFixedWithNextNode; 34 import org.graalvm.compiler.nodes.FrameState; 35 import org.graalvm.compiler.nodes.extended.MembarNode; 36 import org.graalvm.compiler.nodes.spi.Lowerable; 37 import org.graalvm.compiler.nodes.spi.LoweringTool; 38 39 import jdk.vm.ci.code.MemoryBarriers; 40 41 /** 42 * The {@code AbstractNewObjectNode} is the base class for the new instance and new array nodes. 43 */ 44 @NodeInfo(cycles = CYCLES_8, cyclesRationale = "tlab alloc + header init", size = SIZE_8) 45 public abstract class AbstractNewObjectNode extends DeoptimizingFixedWithNextNode implements Lowerable { 46 47 public static final NodeClass<AbstractNewObjectNode> TYPE = NodeClass.create(AbstractNewObjectNode.class); 48 protected final boolean fillContents; 49 50 /** 51 * Controls whether this allocation emits a {@link MembarNode} with 52 * {@link MemoryBarriers#STORE_STORE} as part of the object initialization. 53 */ 54 protected boolean emitMemoryBarrier = true; 55 56 protected AbstractNewObjectNode(NodeClass<? extends AbstractNewObjectNode> c, Stamp stamp, boolean fillContents, FrameState stateBefore) { 57 super(c, stamp, stateBefore); 58 this.fillContents = fillContents; 59 } 60 61 /** 62 * @return <code>true</code> if the object's contents should be initialized to zero/null. 63 */ 64 public boolean fillContents() { 65 return fillContents; 66 } 67 68 @Override 69 public void lower(LoweringTool tool) { 70 tool.getLowerer().lower(this, tool); 71 } 72 73 @Override 74 public boolean canDeoptimize() { 75 return true; 76 } 77 78 public boolean emitMemoryBarrier() { 79 return emitMemoryBarrier; 80 } 81 82 public void clearEmitMemoryBarrier() { 83 this.emitMemoryBarrier = false; 84 } 85 }