Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/AbstractNewArrayNode.java @ 12045:0fc653a9e019
made GraalCodeCacheProvider independent of CodeCacheProvider and renamed the former to LoweringProvider (GRAAL-511)
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 10 Oct 2013 20:50:54 +0200 |
parents | 23ccaa863eda |
children | 1f4c9729c9f0 |
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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.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; /** * The {@code AbstractNewArrayNode} is used for all 1-dimensional array allocations. */ public class AbstractNewArrayNode extends DeoptimizingFixedWithNextNode implements Canonicalizable, Lowerable, ArrayLengthProvider { @Input private ValueNode length; private final boolean fillContents; @Override public ValueNode length() { return length; } /** * Constructs a new AbstractNewArrayNode. * * @param stamp the stamp of the newly created array * @param length the node that produces the length for this allocation. * @param fillContents determines whether the array elements should be initialized to zero/null. */ protected AbstractNewArrayNode(Stamp stamp, ValueNode length, boolean fillContents) { super(stamp); this.length = length; this.fillContents = fillContents; } /** * @return <code>true</code> if the elements of the array will be initialized. */ public boolean fillContents() { return fillContents; } /** * The list of node which produce input for this instruction. */ public ValueNode dimension(int index) { assert index == 0; return length(); } /** * The rank of the array allocated by this node, i.e. how many array dimensions. */ public int dimensionCount() { return 1; } @Override public Node canonical(CanonicalizerTool tool) { if (usages().isEmpty()) { Stamp stamp = length.stamp(); if (stamp instanceof IntegerStamp && ((IntegerStamp) stamp).isPositive()) { return null; } } return this; } @Override public void lower(LoweringTool tool) { tool.getLowerer().lower(this, tool); } @Override public boolean canDeoptimize() { return true; } }