Mercurial > hg > graal-compiler
view graal/com.oracle.graal.loop.phases/src/com/oracle/graal/loop/phases/LoopUnswitchingPhase.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> |
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date | Fri, 13 Nov 2015 14:12:43 +0100 |
parents | graal/com.oracle.graal.loop/src/com/oracle/graal/loop/phases/LoopUnswitchingPhase.java@05183a084a08 |
children |
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/* * Copyright (c) 2012, 2012, 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 java.util.List; import com.oracle.graal.debug.Debug; import com.oracle.graal.debug.DebugMetric; import com.oracle.graal.graph.NodePosIterator; import com.oracle.graal.loop.LoopEx; import com.oracle.graal.loop.LoopPolicies; import com.oracle.graal.loop.LoopsData; import com.oracle.graal.nodes.AbstractBeginNode; import com.oracle.graal.nodes.ControlSplitNode; import com.oracle.graal.nodes.StructuredGraph; public class LoopUnswitchingPhase extends ContextlessLoopPhase<LoopPolicies> { private static final DebugMetric UNSWITCHED = Debug.metric("Unswitched"); private static final DebugMetric UNSWITCH_CANDIDATES = Debug.metric("UnswitchCandidates"); private static final DebugMetric UNSWITCH_EARLY_REJECTS = Debug.metric("UnswitchEarlyRejects"); public LoopUnswitchingPhase(LoopPolicies policies) { super(policies); } @Override protected void run(StructuredGraph graph) { if (graph.hasLoops()) { boolean unswitched; do { unswitched = false; final LoopsData dataUnswitch = new LoopsData(graph); for (LoopEx loop : dataUnswitch.outerFirst()) { if (getPolicies().shouldTryUnswitch(loop)) { List<ControlSplitNode> controlSplits = LoopTransformations.findUnswitchable(loop); if (controlSplits != null) { UNSWITCH_CANDIDATES.increment(); if (getPolicies().shouldUnswitch(loop, controlSplits)) { if (Debug.isLogEnabled()) { logUnswitch(loop, controlSplits); } LoopTransformations.unswitch(loop, controlSplits); UNSWITCHED.increment(); unswitched = true; break; } } } else { UNSWITCH_EARLY_REJECTS.increment(); } } } while (unswitched); } } private static void logUnswitch(LoopEx loop, List<ControlSplitNode> controlSplits) { StringBuilder sb = new StringBuilder("Unswitching "); sb.append(loop).append(" at "); for (ControlSplitNode controlSplit : controlSplits) { sb.append(controlSplit).append(" ["); NodePosIterator it = controlSplit.successors().iterator(); while (it.hasNext()) { sb.append(controlSplit.probability((AbstractBeginNode) it.next())); if (it.hasNext()) { sb.append(", "); } } sb.append("]"); } Debug.log("%s", sb); } }