Mercurial > hg > graal-compiler
view graal/com.oracle.graal.loop.phases/src/com/oracle/graal/loop/phases/LoopSafepointEliminationPhase.java @ 22992:dd3f7ad81b73
Split com.oracle.graal.loop in 2 parts, Make LoopPolicies extensible
Moved the phases out of com.oracle.graal.loop into com.oracle.graal.loop.phases.
Made LoopPolicies an interface with a default implementation.
Pass a LoopPolicies instance to the different loop phases constructors.
Add abstract classes for loop phases to hold onto the loop polcies.
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
---|---|
date | Fri, 13 Nov 2015 14:12:43 +0100 |
parents | graal/com.oracle.graal.loop/src/com/oracle/graal/loop/phases/LoopSafepointEliminationPhase.java@3566ad79cf86 |
children | bbdf5fb03cb8 |
line wrap: on
line source
/* * 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.LoopEx; import com.oracle.graal.loop.LoopsData; import com.oracle.graal.nodes.FixedNode; import com.oracle.graal.nodes.Invoke; import com.oracle.graal.nodes.LoopEndNode; import com.oracle.graal.nodes.StructuredGraph; import com.oracle.graal.nodes.cfg.Block; import com.oracle.graal.nodes.extended.ForeignCallNode; import com.oracle.graal.phases.BasePhase; import com.oracle.graal.phases.tiers.MidTierContext; public class LoopSafepointEliminationPhase extends BasePhase<MidTierContext> { @Override protected void run(StructuredGraph graph, MidTierContext context) { LoopsData loops = new LoopsData(graph); if (context.getOptimisticOptimizations().useLoopLimitChecks() && graph.getGuardsStage().allowsFloatingGuards()) { 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(); loop.loopBegin().disableSafepoint(); } } } } for (LoopEx loop : loops.countedLoops()) { for (LoopEndNode loopEnd : loop.loopBegin().loopEnds()) { Block b = loops.getCFG().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(); } }