Mercurial > hg > graal-compiler
view graal/com.oracle.graal.phases.common/src/com/oracle/graal/phases/common/LockEliminationPhase.java @ 9520:3bb1834202f7
Merge.
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 02 May 2013 17:35:36 +0200 |
parents | 5e3d1a68664e |
children | 2eb56f87b01e |
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/* * Copyright (c) 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.phases.common; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.java.*; import com.oracle.graal.nodes.util.*; import com.oracle.graal.phases.*; public class LockEliminationPhase extends Phase { @Override protected void run(StructuredGraph graph) { for (MonitorExitNode node : graph.getNodes(MonitorExitNode.class)) { FixedNode next = node.next(); if (next instanceof MonitorEnterNode) { MonitorEnterNode monitorEnterNode = (MonitorEnterNode) next; if (monitorEnterNode.object() == node.object()) { FixedNode monitorEnterSuccessor = monitorEnterNode.next(); monitorEnterNode.setNext(null); ((FixedWithNextNode) node.predecessor()).setNext(monitorEnterSuccessor); FrameState stateAfterFirst = node.stateAfter(); FrameState stateAfterSecond = monitorEnterNode.stateAfter(); node.safeDelete(); monitorEnterNode.safeDelete(); if (stateAfterFirst.usages().isEmpty()) { GraphUtil.killWithUnusedFloatingInputs(stateAfterFirst); } if (stateAfterSecond.usages().isEmpty()) { GraphUtil.killWithUnusedFloatingInputs(stateAfterSecond); } } } } } }