Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/NewArrayNode.java @ 9497:394f1232d563
late lowering of allocations (NewInstanceNode, NewArrayNode, NewMultiArrayNode)
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Thu, 25 Apr 2013 17:19:41 +0200 |
parents | 435bb9425124 |
children | 106f0a0acafa |
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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 com.oracle.graal.api.meta.*; import com.oracle.graal.graph.*; 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 1-dimensional array allocations. */ public class NewArrayNode extends FixedWithNextNode implements Canonicalizable, Lowerable, VirtualizableAllocation, ArrayLengthProvider, Node.IterableNodeType { @Input private ValueNode length; private final ResolvedJavaType elementType; private final boolean fillContents; private final boolean locked; @Override public ValueNode length() { return length; } /** * 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. * @param locked determines whether the array should be locked immediately. */ public NewArrayNode(ResolvedJavaType elementType, ValueNode length, boolean fillContents, boolean locked) { super(StampFactory.exactNonNull(elementType.getArrayClass())); this.length = length; this.elementType = elementType; this.fillContents = fillContents; this.locked = locked; } /** * @return <code>true</code> if the elements of the array will be initialized. */ public boolean fillContents() { return fillContents; } /** * @return <code>true</code> if the array will be locked immediately. */ public boolean locked() { return locked; } /** * The list of node which produce input for this instruction. */ public ValueNode dimension(int index) { assert index == 0; return length(); } /** * Gets the element type of the array. * * @return the element type of the array */ public ResolvedJavaType elementType() { return elementType; } /** * The rank of the array allocated by this node, i.e. how many array dimensions. */ public int dimensionCount() { return 1; } @Override public ValueNode canonical(CanonicalizerTool tool) { if (usages().isEmpty() && length.integerStamp().isPositive()) { return null; } else { return this; } } @Override public void lower(LoweringTool tool, LoweringType loweringType) { if (loweringType == LoweringType.AFTER_GUARDS) { tool.getRuntime().lower(this, tool); } } @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 : ConstantNode.defaultForKind(elementType().getKind(), graph()); for (int i = 0; i < constantLength; i++) { state[i] = defaultForKind; } VirtualObjectNode virtualObject = new VirtualArrayNode(elementType, constantLength); tool.createVirtualObject(virtualObject, state, 0); tool.replaceWithVirtual(virtualObject); } } } }