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 jdk.vm.ci.meta.JavaKind;
  26 import jdk.vm.ci.meta.ResolvedJavaMethod;
  27 
  28 import org.graalvm.compiler.core.common.LocationIdentity;
  29 import org.graalvm.compiler.graph.Node.ConstantNodeParameter;
  30 import org.graalvm.compiler.graph.Node.NodeIntrinsic;
  31 import org.graalvm.compiler.nodes.ValueNode;
  32 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext;
  33 
  34 /**
  35  * Copy a value at a location specified as an offset relative to a source object to another location
  36  * specified as an offset relative to destination object. No null checks are performed.
  37  */
  38 public final class UnsafeCopyNode {
  39 
  40     public static boolean intrinsify(GraphBuilderContext b, @SuppressWarnings("unused") ResolvedJavaMethod targetMethod, ValueNode sourceObject, ValueNode sourceOffset, ValueNode destinationObject,
  41                     ValueNode destinationOffset, JavaKind accessKind, LocationIdentity locationIdentity) {
  42         RawLoadNode value = b.add(new RawLoadNode(sourceObject, sourceOffset, accessKind, locationIdentity));
  43         b.add(new RawStoreNode(destinationObject, destinationOffset, value, accessKind, locationIdentity));
  44         return true;
  45     }
  46 
  47     @NodeIntrinsic
  48     public static native void copy(Object srcObject, long srcOffset, Object destObject, long destOffset, @ConstantNodeParameter JavaKind kind,
  49                     @ConstantNodeParameter LocationIdentity locationIdentity);
  50 }