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 
  24 
  25 package org.graalvm.compiler.core.phases;
  26 
  27 import static org.graalvm.compiler.core.common.GraalOptions.ConditionalElimination;
  28 import static org.graalvm.compiler.core.common.GraalOptions.ImmutableCode;
  29 import static org.graalvm.compiler.core.common.GraalOptions.OptDeoptimizationGrouping;
  30 import static org.graalvm.compiler.core.common.GraalOptions.OptFloatingReads;
  31 import static org.graalvm.compiler.core.common.GraalOptions.OptLoopTransform;
  32 import static org.graalvm.compiler.core.common.GraalOptions.PartialUnroll;
  33 import static org.graalvm.compiler.core.common.GraalOptions.ReassociateInvariants;
  34 import static org.graalvm.compiler.core.common.GraalOptions.VerifyHeapAtReturn;
  35 
  36 import org.graalvm.compiler.loop.DefaultLoopPolicies;
  37 import org.graalvm.compiler.loop.LoopPolicies;
  38 import org.graalvm.compiler.loop.phases.LoopPartialUnrollPhase;
  39 import org.graalvm.compiler.loop.phases.LoopSafepointEliminationPhase;
  40 import org.graalvm.compiler.loop.phases.ReassociateInvariantPhase;
  41 import org.graalvm.compiler.nodes.spi.LoweringTool;
  42 import org.graalvm.compiler.options.OptionValues;
  43 import org.graalvm.compiler.phases.PhaseSuite;
  44 import org.graalvm.compiler.phases.common.CanonicalizerPhase;
  45 import org.graalvm.compiler.phases.common.DeoptimizationGroupingPhase;
  46 import org.graalvm.compiler.phases.common.FloatingReadPhase;
  47 import org.graalvm.compiler.phases.common.FrameStateAssignmentPhase;
  48 import org.graalvm.compiler.phases.common.GuardLoweringPhase;
  49 import org.graalvm.compiler.phases.common.IncrementalCanonicalizerPhase;
  50 import org.graalvm.compiler.phases.common.IterativeConditionalEliminationPhase;
  51 import org.graalvm.compiler.phases.common.LockEliminationPhase;
  52 import org.graalvm.compiler.phases.common.LoopSafepointInsertionPhase;
  53 import org.graalvm.compiler.phases.common.LoweringPhase;
  54 import org.graalvm.compiler.phases.common.VerifyHeapAtReturnPhase;
  55 import org.graalvm.compiler.phases.tiers.MidTierContext;
  56 
  57 public class MidTier extends PhaseSuite<MidTierContext> {
  58 
  59     public MidTier(OptionValues options) {
  60         CanonicalizerPhase canonicalizer = new CanonicalizerPhase();
  61         if (ImmutableCode.getValue(options)) {
  62             canonicalizer.disableReadCanonicalization();
  63         }
  64 
  65         appendPhase(new LockEliminationPhase());
  66 
  67         if (OptFloatingReads.getValue(options)) {
  68             appendPhase(new IncrementalCanonicalizerPhase<>(canonicalizer, new FloatingReadPhase()));
  69         }
  70 
  71         if (ConditionalElimination.getValue(options)) {
  72             appendPhase(new IterativeConditionalEliminationPhase(canonicalizer, true));
  73         }
  74 
  75         appendPhase(new LoopSafepointEliminationPhase());
  76 
  77         appendPhase(new LoopSafepointInsertionPhase());
  78 
  79         appendPhase(new GuardLoweringPhase());
  80 
  81         if (VerifyHeapAtReturn.getValue(options)) {
  82             appendPhase(new VerifyHeapAtReturnPhase());
  83         }
  84 
  85         appendPhase(new LoweringPhase(canonicalizer, LoweringTool.StandardLoweringStage.MID_TIER));
  86 
  87         appendPhase(new FrameStateAssignmentPhase());
  88 
  89         LoopPolicies loopPolicies = createLoopPolicies();
  90         if (OptLoopTransform.getValue(options)) {
  91             if (PartialUnroll.getValue(options)) {
  92                 appendPhase(new LoopPartialUnrollPhase(loopPolicies, canonicalizer));
  93             }
  94         }
  95         if (ReassociateInvariants.getValue(options)) {
  96             appendPhase(new ReassociateInvariantPhase());
  97         }
  98 
  99         if (OptDeoptimizationGrouping.getValue(options)) {
 100             appendPhase(new DeoptimizationGroupingPhase());
 101         }
 102 
 103         appendPhase(canonicalizer);
 104     }
 105 
 106     public LoopPolicies createLoopPolicies() {
 107         return new DefaultLoopPolicies();
 108     }
 109 }