1 /*
   2  * Copyright (c) 2016, 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.extended;
  26 
  27 import static org.graalvm.compiler.nodeinfo.InputType.Guard;
  28 
  29 import org.graalvm.compiler.graph.NodeClass;
  30 import org.graalvm.compiler.nodeinfo.NodeInfo;
  31 import org.graalvm.compiler.nodes.ValueNode;
  32 import jdk.internal.vm.compiler.word.LocationIdentity;
  33 
  34 import jdk.vm.ci.meta.JavaKind;
  35 
  36 @NodeInfo
  37 public class GuardedUnsafeLoadNode extends RawLoadNode implements GuardedNode {
  38     public static final NodeClass<GuardedUnsafeLoadNode> TYPE = NodeClass.create(GuardedUnsafeLoadNode.class);
  39 
  40     @OptionalInput(Guard) protected GuardingNode guard;
  41 
  42     public GuardedUnsafeLoadNode(ValueNode object, ValueNode offset, JavaKind accessKind, LocationIdentity locationIdentity, ValueNode guard) {
  43         super(TYPE, object, offset, accessKind, locationIdentity);
  44         this.guard = (GuardingNode) guard;
  45     }
  46 
  47     @Override
  48     public GuardingNode getGuard() {
  49         return guard;
  50     }
  51 
  52     @Override
  53     public void setGuard(GuardingNode guard) {
  54         updateUsagesInterface(this.guard, guard);
  55         this.guard = guard;
  56     }
  57 
  58     @NodeIntrinsic
  59     public static native Object guardedLoad(Object object, long offset, @ConstantNodeParameter JavaKind kind, @ConstantNodeParameter LocationIdentity locationIdentity, GuardingNode guard);
  60 }