1 /*
   2  * Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.graalvm.compiler.core.phases;
  24 
  25 import static org.graalvm.compiler.core.common.GraalOptions.ConditionalElimination;
  26 import static org.graalvm.compiler.core.common.GraalOptions.ImmutableCode;
  27 import static org.graalvm.compiler.core.common.GraalOptions.OptDeoptimizationGrouping;
  28 import static org.graalvm.compiler.core.common.GraalOptions.OptFloatingReads;
  29 import static org.graalvm.compiler.core.common.GraalOptions.OptLoopTransform;
  30 import static org.graalvm.compiler.core.common.GraalOptions.PartialUnroll;
  31 import static org.graalvm.compiler.core.common.GraalOptions.ReassociateInvariants;
  32 import static org.graalvm.compiler.core.common.GraalOptions.VerifyHeapAtReturn;
  33 
  34 import org.graalvm.compiler.loop.DefaultLoopPolicies;
  35 import org.graalvm.compiler.loop.LoopPolicies;
  36 import org.graalvm.compiler.loop.phases.LoopPartialUnrollPhase;
  37 import org.graalvm.compiler.loop.phases.LoopSafepointEliminationPhase;
  38 import org.graalvm.compiler.loop.phases.ReassociateInvariantPhase;
  39 import org.graalvm.compiler.nodes.spi.LoweringTool;
  40 import org.graalvm.compiler.options.OptionValues;
  41 import org.graalvm.compiler.phases.PhaseSuite;
  42 import org.graalvm.compiler.phases.common.CanonicalizerPhase;
  43 import org.graalvm.compiler.phases.common.DeoptimizationGroupingPhase;
  44 import org.graalvm.compiler.phases.common.FloatingReadPhase;
  45 import org.graalvm.compiler.phases.common.FrameStateAssignmentPhase;
  46 import org.graalvm.compiler.phases.common.GuardLoweringPhase;
  47 import org.graalvm.compiler.phases.common.IncrementalCanonicalizerPhase;
  48 import org.graalvm.compiler.phases.common.IterativeConditionalEliminationPhase;
  49 import org.graalvm.compiler.phases.common.LockEliminationPhase;
  50 import org.graalvm.compiler.phases.common.LoopSafepointInsertionPhase;
  51 import org.graalvm.compiler.phases.common.LoweringPhase;
  52 import org.graalvm.compiler.phases.common.VerifyHeapAtReturnPhase;
  53 import org.graalvm.compiler.phases.tiers.MidTierContext;
  54 
  55 public class MidTier extends PhaseSuite<MidTierContext> {
  56 
  57     public MidTier(OptionValues options) {
  58         CanonicalizerPhase canonicalizer = new CanonicalizerPhase();
  59         if (ImmutableCode.getValue(options)) {
  60             canonicalizer.disableReadCanonicalization();
  61         }
  62 
  63         appendPhase(new LockEliminationPhase());
  64 
  65         if (OptFloatingReads.getValue(options)) {
  66             appendPhase(new IncrementalCanonicalizerPhase<>(canonicalizer, new FloatingReadPhase()));
  67         }
  68 
  69         if (ConditionalElimination.getValue(options)) {
  70             appendPhase(new IterativeConditionalEliminationPhase(canonicalizer, true));
  71         }
  72 
  73         appendPhase(new LoopSafepointEliminationPhase());
  74 
  75         appendPhase(new LoopSafepointInsertionPhase());
  76 
  77         appendPhase(new GuardLoweringPhase());
  78 
  79         if (VerifyHeapAtReturn.getValue(options)) {
  80             appendPhase(new VerifyHeapAtReturnPhase());
  81         }
  82 
  83         appendPhase(new LoweringPhase(canonicalizer, LoweringTool.StandardLoweringStage.MID_TIER));
  84 
  85         appendPhase(new FrameStateAssignmentPhase());
  86 
  87         LoopPolicies loopPolicies = createLoopPolicies();
  88         if (OptLoopTransform.getValue(options)) {
  89             if (PartialUnroll.getValue(options)) {
  90                 appendPhase(new LoopPartialUnrollPhase(loopPolicies, canonicalizer));
  91             }
  92         }
  93         if (ReassociateInvariants.getValue(options)) {
  94             appendPhase(new ReassociateInvariantPhase());
  95         }
  96 
  97         if (OptDeoptimizationGrouping.getValue(options)) {
  98             appendPhase(new DeoptimizationGroupingPhase());
  99         }
 100 
 101         appendPhase(canonicalizer);
 102     }
 103 
 104     public LoopPolicies createLoopPolicies() {
 105         return new DefaultLoopPolicies();
 106     }
 107 }