1 /*
   2  * Copyright (c) 2015, 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.replacements.arraycopy;
  24 
  25 import jdk.vm.ci.meta.JavaKind;
  26 
  27 import static org.graalvm.compiler.core.common.LocationIdentity.any;
  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.InputType;
  33 import org.graalvm.compiler.nodeinfo.NodeInfo;
  34 import org.graalvm.compiler.nodes.NamedLocationIdentity;
  35 import org.graalvm.compiler.nodes.ValueNode;
  36 import org.graalvm.compiler.nodes.extended.ArrayRangeWriteNode;
  37 import org.graalvm.compiler.nodes.memory.MemoryAccess;
  38 import org.graalvm.compiler.nodes.memory.MemoryCheckpoint;
  39 import org.graalvm.compiler.nodes.memory.MemoryNode;
  40 import org.graalvm.compiler.nodes.spi.Lowerable;
  41 import org.graalvm.compiler.nodes.spi.LoweringTool;
  42 
  43 @NodeInfo(allowedUsageTypes = InputType.Memory)
  44 public class ArrayCopyUnrollNode extends ArrayRangeWriteNode implements MemoryCheckpoint.Single, Lowerable, MemoryAccess {
  45 
  46     public static final NodeClass<ArrayCopyUnrollNode> TYPE = NodeClass.create(ArrayCopyUnrollNode.class);
  47 
  48     @Input protected ValueNode src;
  49     @Input protected ValueNode srcPos;
  50     @Input protected ValueNode dest;
  51     @Input protected ValueNode destPos;
  52     @Input protected ValueNode length;
  53 
  54     private JavaKind elementKind;
  55 
  56     private int unrolledLength;
  57 
  58     @OptionalInput(InputType.Memory) private MemoryNode lastLocationAccess;
  59 
  60     public ArrayCopyUnrollNode(ValueNode src, ValueNode srcPos, ValueNode dest, ValueNode destPos, ValueNode length, int unrolledLength, JavaKind elementKind) {
  61         super(TYPE, StampFactory.forKind(JavaKind.Void));
  62         this.src = src;
  63         this.srcPos = srcPos;
  64         this.dest = dest;
  65         this.destPos = destPos;
  66         this.length = length;
  67         this.unrolledLength = unrolledLength;
  68         assert elementKind != null && elementKind != JavaKind.Illegal;
  69         this.elementKind = elementKind;
  70     }
  71 
  72     public ValueNode getSource() {
  73         return src;
  74     }
  75 
  76     public ValueNode getSourcePosition() {
  77         return srcPos;
  78     }
  79 
  80     public ValueNode getDestination() {
  81         return dest;
  82     }
  83 
  84     public ValueNode getDestinationPosition() {
  85         return destPos;
  86     }
  87 
  88     @Override
  89     public ValueNode getLength() {
  90         return length;
  91     }
  92 
  93     @Override
  94     public ValueNode getArray() {
  95         return dest;
  96     }
  97 
  98     @Override
  99     public ValueNode getIndex() {
 100         return destPos;
 101     }
 102 
 103     @Override
 104     public boolean isObjectArray() {
 105         return elementKind == JavaKind.Object;
 106     }
 107 
 108     @Override
 109     public boolean isInitialization() {
 110         return false;
 111     }
 112 
 113     @NodeIntrinsic
 114     public static native void arraycopy(Object nonNullSrc, int srcPos, Object nonNullDest, int destPos, int length, @ConstantNodeParameter int unrolledLength,
 115                     @ConstantNodeParameter JavaKind elementKind);
 116 
 117     public int getUnrollLength() {
 118         return unrolledLength;
 119     }
 120 
 121     public JavaKind getElementKind() {
 122         return elementKind;
 123     }
 124 
 125     @Override
 126     public LocationIdentity getLocationIdentity() {
 127         if (elementKind != null) {
 128             return NamedLocationIdentity.getArrayLocation(elementKind);
 129         }
 130         return any();
 131     }
 132 
 133     @Override
 134     public void lower(LoweringTool tool) {
 135         tool.getLowerer().lower(this, tool);
 136     }
 137 
 138     @Override
 139     public MemoryNode getLastLocationAccess() {
 140         return lastLocationAccess;
 141     }
 142 
 143     @Override
 144     public void setLastLocationAccess(MemoryNode lla) {
 145         updateUsagesInterface(lastLocationAccess, lla);
 146         lastLocationAccess = lla;
 147     }
 148 }