1 /*
   2  * Copyright (c) 2012, 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.hotspot.nodes;
  24 
  25 import static org.graalvm.compiler.nodeinfo.InputType.Memory;
  26 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0;
  27 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0;
  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.extended.MonitorExit;
  34 import org.graalvm.compiler.nodes.memory.AbstractMemoryCheckpoint;
  35 import org.graalvm.compiler.nodes.memory.MemoryCheckpoint;
  36 import org.graalvm.compiler.nodes.spi.LIRLowerable;
  37 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
  38 
  39 /**
  40  * Intrinsic for closing a {@linkplain BeginLockScopeNode scope} binding a stack-based lock with an
  41  * object.
  42  */
  43 @NodeInfo(allowedUsageTypes = Memory, cycles = CYCLES_0, size = SIZE_0)
  44 public final class EndLockScopeNode extends AbstractMemoryCheckpoint implements LIRLowerable, MonitorExit, MemoryCheckpoint.Single {
  45     public static final NodeClass<EndLockScopeNode> TYPE = NodeClass.create(EndLockScopeNode.class);
  46 
  47     public EndLockScopeNode() {
  48         super(TYPE, StampFactory.forVoid());
  49     }
  50 
  51     @Override
  52     public boolean hasSideEffect() {
  53         return false;
  54     }
  55 
  56     @Override
  57     public LocationIdentity getLocationIdentity() {
  58         return LocationIdentity.any();
  59     }
  60 
  61     @Override
  62     public void generate(NodeLIRBuilderTool gen) {
  63     }
  64 
  65     @NodeIntrinsic
  66     public static native void endLockScope();
  67 }