Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/ArrayLengthNode.java @ 5507:dc71b06d09f8
Moving classes from cri.ri to api.meta.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Thu, 07 Jun 2012 18:24:06 +0200 |
parents | 13aee5aba8cc |
children | 426c605c9d3c |
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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.max.cri.ri.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.cri.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; /** * The {@code ArrayLength} instruction gets the length of an array. */ public final class ArrayLengthNode extends FixedWithNextNode implements Canonicalizable, Lowerable { @Input private ValueNode array; public ValueNode array() { return array; } public ArrayLengthNode(ValueNode array) { super(StampFactory.positiveInt()); this.array = array; } @Override public ValueNode canonical(CanonicalizerTool tool) { if (array() instanceof NewArrayNode) { ValueNode length = ((NewArrayNode) array()).dimension(0); assert length != null; return length; } RiRuntime runtime = tool.runtime(); if (runtime != null && array().isConstant() && !array().isNullConstant()) { RiConstant constantValue = array().asConstant(); if (constantValue != null && constantValue.isNonNull()) { return ConstantNode.forInt(runtime.getArrayLength(constantValue), graph()); } } return this; } @Override public void lower(CiLoweringTool tool) { tool.getRuntime().lower(this, tool); } }