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view graal/com.oracle.graal.loop/src/com/oracle/graal/loop/phases/LoopSafepointEliminationPhase.java @ 16269:f5437f2db322
mx fsckprojects: do not traverse lib subdirectory
author | Andreas Woess <andreas.woess@jku.at> |
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date | Fri, 27 Jun 2014 17:24:28 +0200 |
parents | 7fb828b4c32b |
children | 2dbfa1ed5efa |
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/* * Copyright (c) 2011, 2013, 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.loop.phases; import com.oracle.graal.loop.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.cfg.*; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.phases.*; import com.oracle.graal.phases.tiers.*; public class LoopSafepointEliminationPhase extends BasePhase<MidTierContext> { @Override protected void run(StructuredGraph graph, MidTierContext context) { LoopsData loops = new LoopsData(graph); if (context.getOptimisticOptimizations().useLoopLimitChecks()) { loops.detectedCountedLoops(); for (LoopEx loop : loops.countedLoops()) { if (loop.loop().getChildren().isEmpty() && loop.counted().getStamp().getBits() <= 32) { boolean hasSafepoint = false; for (LoopEndNode loopEnd : loop.loopBegin().loopEnds()) { hasSafepoint |= loopEnd.canSafepoint(); } if (hasSafepoint) { loop.counted().createOverFlowGuard(); for (LoopEndNode loopEnd : loop.loopBegin().loopEnds()) { loopEnd.disableSafepoint(); } } } } } for (LoopEx loop : loops.countedLoops()) { for (LoopEndNode loopEnd : loop.loopBegin().loopEnds()) { Block b = loops.controlFlowGraph().blockFor(loopEnd); blocks: while (b != loop.loop().getHeader()) { assert b != null; for (FixedNode node : b.getNodes()) { if (node instanceof Invoke || node instanceof ForeignCallNode) { loopEnd.disableSafepoint(); break blocks; } } b = b.getDominator(); } } } loops.deleteUnusedNodes(); } }