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/*
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* Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.graalvm.compiler.phases.common;
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import org.graalvm.compiler.nodes.FrameState;
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import org.graalvm.compiler.nodes.LoopExitNode;
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import org.graalvm.compiler.nodes.StructuredGraph;
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import org.graalvm.compiler.nodes.util.GraphUtil;
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import org.graalvm.compiler.phases.Phase;
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public class RemoveValueProxyPhase extends Phase {
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@Override
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protected void run(StructuredGraph graph) {
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for (LoopExitNode exit : graph.getNodes(LoopExitNode.TYPE)) {
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exit.removeProxies();
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FrameState frameState = exit.stateAfter();
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if (frameState != null && frameState.isExceptionHandlingBCI()) {
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// The parser will create loop exits with such BCIs on the exception handling path.
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// Loop optimizations must avoid duplicating such exits
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// We clean them up here otherwise they could survive until code generation
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exit.setStateAfter(null);
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GraphUtil.tryKillUnused(frameState);
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}
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}
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graph.setHasValueProxies(false);
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}
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}
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