| /* |
| * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| |
| package org.graalvm.compiler.nodes.virtual; |
| |
| import java.nio.ByteOrder; |
| |
| import org.graalvm.compiler.core.common.spi.ArrayOffsetProvider; |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| import org.graalvm.compiler.nodeinfo.Verbosity; |
| import org.graalvm.compiler.nodes.ConstantNode; |
| import org.graalvm.compiler.nodes.FixedNode; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.spi.ArrayLengthProvider; |
| import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; |
| |
| import jdk.vm.ci.meta.JavaKind; |
| import jdk.vm.ci.meta.ResolvedJavaType; |
| |
| @NodeInfo(nameTemplate = "VirtualArray({p#objectId}) {p#componentType/s}[{p#length}]") |
| public class VirtualArrayNode extends VirtualObjectNode implements ArrayLengthProvider { |
| |
| public static final NodeClass<VirtualArrayNode> TYPE = NodeClass.create(VirtualArrayNode.class); |
| protected final ResolvedJavaType componentType; |
| protected final int length; |
| |
| public VirtualArrayNode(ResolvedJavaType componentType, int length) { |
| this(TYPE, componentType, length); |
| } |
| |
| protected VirtualArrayNode(NodeClass<? extends VirtualObjectNode> c, ResolvedJavaType componentType, int length) { |
| super(c, componentType.getArrayClass(), true); |
| this.componentType = componentType; |
| this.length = length; |
| } |
| |
| @Override |
| public ResolvedJavaType type() { |
| return componentType.getArrayClass(); |
| } |
| |
| public ResolvedJavaType componentType() { |
| return componentType; |
| } |
| |
| @Override |
| public int entryCount() { |
| return length; |
| } |
| |
| @Override |
| public void generate(NodeLIRBuilderTool gen) { |
| // nothing to do... |
| } |
| |
| @Override |
| public String toString(Verbosity verbosity) { |
| if (verbosity == Verbosity.Name) { |
| return super.toString(Verbosity.Name) + "(" + getObjectId() + ") " + componentType.getName() + "[" + length + "]"; |
| } else { |
| return super.toString(verbosity); |
| } |
| } |
| |
| @Override |
| public String entryName(int index) { |
| return "[" + index + "]"; |
| } |
| |
| @Override |
| public int entryIndexForOffset(ArrayOffsetProvider arrayOffsetProvider, long constantOffset, JavaKind expectedEntryKind) { |
| return entryIndexForOffset(arrayOffsetProvider, constantOffset, expectedEntryKind, componentType, length); |
| } |
| |
| public static int entryIndexForOffset(ArrayOffsetProvider arrayOffsetProvider, long constantOffset, JavaKind expectedEntryKind, ResolvedJavaType componentType, int length) { |
| int baseOffset = arrayOffsetProvider.arrayBaseOffset(componentType.getJavaKind()); |
| int indexScale = arrayOffsetProvider.arrayScalingFactor(componentType.getJavaKind()); |
| |
| long offset; |
| if (ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN && componentType.isPrimitive()) { |
| // On big endian, we expect the value to be correctly aligned in memory |
| int componentByteCount = componentType.getJavaKind().getByteCount(); |
| offset = constantOffset - (componentByteCount - Math.min(componentByteCount, 4 + expectedEntryKind.getByteCount())); |
| } else { |
| offset = constantOffset; |
| } |
| long index = offset - baseOffset; |
| if (index % indexScale != 0) { |
| return -1; |
| } |
| long elementIndex = index / indexScale; |
| if (elementIndex < 0 || elementIndex >= length) { |
| return -1; |
| } |
| return (int) elementIndex; |
| } |
| |
| @Override |
| public JavaKind entryKind(int index) { |
| assert index >= 0 && index < length; |
| return componentType.getJavaKind(); |
| } |
| |
| @Override |
| public VirtualArrayNode duplicate() { |
| VirtualArrayNode node = new VirtualArrayNode(componentType, length); |
| node.setNodeSourcePosition(this.getNodeSourcePosition()); |
| return node; |
| } |
| |
| @Override |
| public ValueNode getMaterializedRepresentation(FixedNode fixed, ValueNode[] entries, LockState locks) { |
| AllocatedObjectNode node = new AllocatedObjectNode(this); |
| node.setNodeSourcePosition(this.getNodeSourcePosition()); |
| return node; |
| } |
| |
| @Override |
| public ValueNode findLength(ArrayLengthProvider.FindLengthMode mode) { |
| return ConstantNode.forInt(length); |
| } |
| } |