Mercurial > hg > graal-compiler
view graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/nodes/LoadSnippetVarargParameterNode.java @ 23386:f20070e9f5a4
Guard agains out-of-bounds exception
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Thu, 04 Feb 2016 11:31:50 -0800 |
parents | 05183a084a08 |
children |
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/* * Copyright (c) 2009, 2015, 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.replacements.nodes; import com.oracle.graal.compiler.common.type.Stamp; import com.oracle.graal.graph.Node; import com.oracle.graal.graph.NodeClass; import com.oracle.graal.graph.NodeInputList; import com.oracle.graal.graph.spi.Canonicalizable; import com.oracle.graal.graph.spi.CanonicalizerTool; import com.oracle.graal.nodeinfo.NodeInfo; import com.oracle.graal.nodes.FixedWithNextNode; import com.oracle.graal.nodes.ParameterNode; import com.oracle.graal.nodes.ValueNode; import com.oracle.graal.replacements.Snippet.VarargsParameter; /** * Implements the semantics of {@link VarargsParameter}. */ @NodeInfo public final class LoadSnippetVarargParameterNode extends FixedWithNextNode implements Canonicalizable { public static final NodeClass<LoadSnippetVarargParameterNode> TYPE = NodeClass.create(LoadSnippetVarargParameterNode.class); @Input ValueNode index; @Input NodeInputList<ParameterNode> parameters; public LoadSnippetVarargParameterNode(ParameterNode[] locals, ValueNode index, Stamp stamp) { super(TYPE, stamp); this.index = index; this.parameters = new NodeInputList<>(this, locals); } @Override public Node canonical(CanonicalizerTool tool) { if (index.isConstant()) { int indexValue = index.asJavaConstant().asInt(); if (indexValue < parameters.size()) { return parameters.get(indexValue); } } return this; } }