Mercurial > hg > graal-jvmci-8
view graal/com.oracle.max.graal.nodes/src/com/oracle/max/graal/nodes/java/ArrayLengthNode.java @ 4309:4a609a685fa4
changes to Node structures:
* add more uses of higher-level graph manipulation methods
* CanonicalierPhase cleanup
* introduce FloatingReadNode, make ReadNode an ordinary fixed nodeToBlock
* let Canonicalizable.canonical return ValueNode (instead of Node)
author | Lukas Stadler <lukas.stadler@jku.at> |
---|---|
date | Tue, 17 Jan 2012 19:45:39 +0100 |
parents | aaac4894175c |
children | 87a12a816e99 |
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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.max.graal.nodes.java; import com.oracle.max.cri.ci.*; import com.oracle.max.cri.ri.*; import com.oracle.max.graal.cri.*; import com.oracle.max.graal.nodes.*; import com.oracle.max.graal.nodes.spi.*; import com.oracle.max.graal.nodes.type.*; /** * The {@code ArrayLength} instruction gets the length of an array. */ public final class ArrayLengthNode extends FixedWithNextNode implements Canonicalizable, Lowerable, LIRLowerable { @Input private ValueNode array; public ValueNode array() { return array; } public ArrayLengthNode(ValueNode array) { super(StampFactory.intValue()); this.array = array; } @Override public void generate(LIRGeneratorTool gen) { gen.visitArrayLength(this); } @Override public ValueNode canonical(CanonicalizerTool tool) { if (array() instanceof NewArrayNode) { ValueNode length = ((NewArrayNode) array()).dimension(0); assert length != null; return length; } CiConstant constantValue = null; if (array().isConstant()) { constantValue = array().asConstant(); if (constantValue != null && constantValue.isNonNull()) { RiRuntime runtime = tool.runtime(); return ConstantNode.forInt(runtime.getArrayLength(constantValue), graph()); } } return this; } @Override public void lower(CiLoweringTool tool) { tool.getRuntime().lower(this, tool); } }