Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/NewArrayNode.java @ 16028:bca2ed3b97fd
skip initialization and use arraycopy for cloning arrays
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Wed, 04 Jun 2014 17:21:09 -0700 |
parents | 882f4cb7cfcf |
children | 5d468add216f |
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/* * Copyright (c) 2009, 2011, 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 com.oracle.graal.nodes.java; import java.util.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; import com.oracle.graal.nodes.virtual.*; /** * The {@code NewArrayNode} is used for all array allocations where the element type is know at * compile time. */ public class NewArrayNode extends AbstractNewArrayNode implements VirtualizableAllocation { /** * Constructs a new NewArrayNode. * * @param elementType the the type of the elements of the newly created array (not the type of * the array itself). * @param length the node that produces the length for this allocation. * @param fillContents determines whether the array elements should be initialized to zero/null. */ public NewArrayNode(ResolvedJavaType elementType, ValueNode length, boolean fillContents) { super(StampFactory.exactNonNull(elementType.getArrayClass()), length, fillContents); } @NodeIntrinsic static private native Object newArray(@ConstantNodeParameter Class<?> elementType, int length, @ConstantNodeParameter boolean fillContents); public static Object newUninitializedArray(Class<?> elementType, int length) { return newArray(elementType, length, false); } /** * Gets the element type of the array. * * @return the element type of the array */ public ResolvedJavaType elementType() { return StampTool.typeOrNull(this).getComponentType(); } @Override public void virtualize(VirtualizerTool tool) { if (length().asConstant() != null) { final int constantLength = length().asConstant().asInt(); if (constantLength >= 0 && constantLength < tool.getMaximumEntryCount()) { ValueNode[] state = new ValueNode[constantLength]; ConstantNode defaultForKind = constantLength == 0 ? null : defaultElementValue(); for (int i = 0; i < constantLength; i++) { state[i] = defaultForKind; } VirtualObjectNode virtualObject = new VirtualArrayNode(elementType(), constantLength); tool.createVirtualObject(virtualObject, state, Collections.<MonitorIdNode> emptyList()); tool.replaceWithVirtual(virtualObject); } } } /* Factored out in a separate method so that subclasses can override it. */ protected ConstantNode defaultElementValue() { return ConstantNode.defaultForKind(elementType().getKind(), graph()); } }