Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/AbstractNewArrayNode.java @ 21931:40aff2bb1880
Preserve stateBefore when creating newInstanceNode and newArrayNode during canonicalization
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Thu, 11 Jun 2015 20:40:11 -0700 |
parents | 8fc336a04d77 |
children |
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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.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; /** * The {@code AbstractNewArrayNode} is used for all 1-dimensional array allocations. */ @NodeInfo public abstract class AbstractNewArrayNode extends AbstractNewObjectNode implements ArrayLengthProvider { public static final NodeClass<AbstractNewArrayNode> TYPE = NodeClass.create(AbstractNewArrayNode.class); @Input protected ValueNode length; @Override public ValueNode length() { return length; } protected AbstractNewArrayNode(NodeClass<? extends AbstractNewArrayNode> c, Stamp stamp, ValueNode length, boolean fillContents, FrameState stateBefore) { super(c, stamp, fillContents, stateBefore); this.length = length; } /** * 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 void simplify(SimplifierTool tool) { Stamp lengthStamp = length.stamp(); if (lengthStamp instanceof IntegerStamp && ((IntegerStamp) lengthStamp).isPositive()) { // otherwise, removing the allocation might swallow a NegativeArraySizeException super.simplify(tool); } } }