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OMROptimizer.cpp
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OMROptimizer.cpp
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/*******************************************************************************
* Copyright (c) 2000, 2021 IBM Corp. and others
*
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which accompanies this
* distribution and is available at http://eclipse.org/legal/epl-2.0
* or the Apache License, Version 2.0 which accompanies this distribution
* and is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License, v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception [1] and GNU General Public
* License, version 2 with the OpenJDK Assembly Exception [2].
*
* [1] https://www.gnu.org/software/classpath/license.html
* [2] http://openjdk.java.net/legal/assembly-exception.html
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
*******************************************************************************/
#include "optimizer/Optimizer.hpp"
#include <limits.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "codegen/CodeGenerator.hpp"
#include "env/FrontEnd.hpp"
#include "compile/Compilation.hpp"
#include "compile/CompilationTypes.hpp"
#include "compile/Method.hpp"
#include "compile/SymbolReferenceTable.hpp"
#include "control/Options.hpp"
#include "control/Options_inlines.hpp"
#include "control/Recompilation.hpp"
#ifdef J9_PROJECT_SPECIFIC
#include "control/RecompilationInfo.hpp"
#endif
#include "env/CompilerEnv.hpp"
#include "env/IO.hpp"
#include "env/PersistentInfo.hpp"
#include "env/StackMemoryRegion.hpp"
#include "env/TRMemory.hpp"
#include "env/jittypes.h"
#include "il/Block.hpp"
#include "il/DataTypes.hpp"
#include "il/ILOpCodes.hpp"
#include "il/ILOps.hpp"
#include "il/Node.hpp"
#include "il/NodePool.hpp"
#include "il/Node_inlines.hpp"
#include "il/ResolvedMethodSymbol.hpp"
#include "il/Symbol.hpp"
#include "il/SymbolReference.hpp"
#include "il/TreeTop.hpp"
#include "il/TreeTop_inlines.hpp"
#include "infra/Assert.hpp"
#include "infra/BitVector.hpp"
#include "infra/Cfg.hpp"
#include "infra/List.hpp"
#include "infra/SimpleRegex.hpp"
#include "infra/CfgNode.hpp"
#include "infra/Timer.hpp"
#include "optimizer/LoadExtensions.hpp"
#include "optimizer/Optimization.hpp"
#include "optimizer/OptimizationManager.hpp"
#include "optimizer/OptimizationStrategies.hpp"
#include "optimizer/Optimizations.hpp"
#include "optimizer/Structure.hpp"
#include "optimizer/StructuralAnalysis.hpp"
#include "optimizer/UseDefInfo.hpp"
#include "optimizer/ValueNumberInfo.hpp"
#include "optimizer/AsyncCheckInsertion.hpp"
#include "optimizer/DeadStoreElimination.hpp"
#include "optimizer/DeadTreesElimination.hpp"
#include "optimizer/CatchBlockRemover.hpp"
#include "optimizer/CFGSimplifier.hpp"
#include "optimizer/CompactLocals.hpp"
#include "optimizer/CopyPropagation.hpp"
#include "optimizer/ExpressionsSimplification.hpp"
#include "optimizer/GeneralLoopUnroller.hpp"
#include "optimizer/LocalCSE.hpp"
#include "optimizer/LocalDeadStoreElimination.hpp"
#include "optimizer/LocalLiveRangeReducer.hpp"
#include "optimizer/LocalOpts.hpp"
#include "optimizer/LocalReordering.hpp"
#include "optimizer/LoopCanonicalizer.hpp"
#include "optimizer/LoopReducer.hpp"
#include "optimizer/LoopReplicator.hpp"
#include "optimizer/LoopVersioner.hpp"
#include "optimizer/OrderBlocks.hpp"
#include "optimizer/RedundantAsyncCheckRemoval.hpp"
#include "optimizer/Simplifier.hpp"
#include "optimizer/VirtualGuardCoalescer.hpp"
#include "optimizer/VirtualGuardHeadMerger.hpp"
#include "optimizer/Inliner.hpp"
#include "ras/Debug.hpp"
#include "optimizer/InductionVariable.hpp"
#include "optimizer/GlobalValuePropagation.hpp"
#include "optimizer/LocalValuePropagation.hpp"
#include "optimizer/RegDepCopyRemoval.hpp"
#include "optimizer/SinkStores.hpp"
#include "optimizer/PartialRedundancy.hpp"
#include "optimizer/OSRDefAnalysis.hpp"
#include "optimizer/StripMiner.hpp"
#include "optimizer/FieldPrivatizer.hpp"
#include "optimizer/ReorderIndexExpr.hpp"
#include "optimizer/GlobalRegisterAllocator.hpp"
#include "optimizer/RecognizedCallTransformer.hpp"
#include "optimizer/SwitchAnalyzer.hpp"
#include "env/RegionProfiler.hpp"
#if defined (_MSC_VER) && _MSC_VER < 1900
#define snprintf _snprintf
#endif
namespace TR { class AutomaticSymbol; }
using namespace OMR; // Note: used here only to avoid having to prepend all opts in strategies with OMR::
#define MAX_LOCAL_OPTS_ITERS 5
const OptimizationStrategy localValuePropagationOpts[] =
{
{ localCSE },
{ localValuePropagation },
{ localCSE, IfEnabled },
{ localValuePropagation, IfEnabled },
{ endGroup }
};
const OptimizationStrategy arrayPrivatizationOpts[] =
{
{ globalValuePropagation, IfMoreThanOneBlock}, // reduce # of null/bounds checks and setup iv info
{ veryCheapGlobalValuePropagationGroup, IfEnabled}, // enabled by blockVersioner
{ inductionVariableAnalysis, IfLoops },
{ loopCanonicalization, IfLoops }, // setup for any unrolling in arrayPrivatization
{ treeSimplification }, // get rid of null/bnd checks if possible
{ deadTreesElimination },
{ basicBlockOrdering, IfLoops }, // required for loop reduction
{ treesCleansing, IfLoops },
{ inductionVariableAnalysis, IfLoops }, // required for array Privatization
{ basicBlockOrdering, IfEnabled }, // cleanup if unrolling happened
{ globalValuePropagation, IfEnabledAndMoreThanOneBlock }, // ditto
{ endGroup }
};
// To be run just before PRE
const OptimizationStrategy reorderArrayIndexOpts[] =
{
{ inductionVariableAnalysis , IfLoops },// need to id the primary IVs
{ reorderArrayIndexExpr, IfLoops },// try to maximize loop invarient
//expressions in index calculations and be hoisted
{ endGroup }
};
const OptimizationStrategy cheapObjectAllocationOpts[] =
{
{ eachEscapeAnalysisPassGroup, IfEAOpportunitiesAndNotOptServer },
{ explicitNewInitialization, IfNews }, // do before local dead store
// basicBlockHoisting, // merge block into pred and prepare for local dead store
{ localDeadStoreElimination }, // remove local/parm/some field stores
{ endGroup }
};
const OptimizationStrategy expensiveObjectAllocationOpts[] =
{
{ eachEscapeAnalysisPassGroup, IfEAOpportunities },
{ explicitNewInitialization, IfNews }, // do before local dead store
{ endGroup }
};
const OptimizationStrategy eachEscapeAnalysisPassOpts[] =
{
{ preEscapeAnalysis, IfOSR },
{ escapeAnalysis },
{ postEscapeAnalysis, IfOSR },
{ eachEscapeAnalysisPassGroup, IfEnabled }, // if another pass requested
{ endGroup }
};
const OptimizationStrategy veryCheapGlobalValuePropagationOpts[] =
{
{ globalValuePropagation, IfMoreThanOneBlock},
{ endGroup }
};
const OptimizationStrategy cheapGlobalValuePropagationOpts[] =
{
//{ catchBlockRemoval, },
{ CFGSimplification, IfOptServer }, // for WAS trace folding
{ treeSimplification, IfOptServer }, // for WAS trace folding
{ localCSE, IfEnabledAndOptServer }, // for WAS trace folding
{ treeSimplification, IfEnabledAndOptServer }, // for WAS trace folding
{ globalValuePropagation, IfMoreThanOneBlock },
{ localValuePropagation, IfOneBlock },
{ treeSimplification, IfEnabled },
{ cheapObjectAllocationGroup },
{ globalValuePropagation, IfEnabled }, // if inlined a call or an object
{ treeSimplification, IfEnabled },
{ catchBlockRemoval, IfEnabled }, // if checks were removed
{ osrExceptionEdgeRemoval }, // most inlining is done by now
{ redundantMonitorElimination, IfMonitors }, // performed if method has monitors
{ redundantMonitorElimination, IfEnabledAndMonitors }, // performed if method has monitors
{ globalValuePropagation, IfEnabledAndMoreThanOneBlockMarkLastRun}, // mark monitors requiring sync
{ virtualGuardTailSplitter, IfEnabled }, // merge virtual guards
{ CFGSimplification },
{ endGroup }
};
const OptimizationStrategy expensiveGlobalValuePropagationOpts[] =
{
///// { innerPreexistence },
{ CFGSimplification, IfOptServer }, // for WAS trace folding
{ treeSimplification, IfOptServer }, // for WAS trace folding
{ localCSE, IfEnabledAndOptServer }, // for WAS trace folding
{ treeSimplification, IfEnabled }, // may be enabled by inner prex
{ globalValuePropagation, IfMoreThanOneBlock },
{ treeSimplification, IfEnabled },
{ deadTreesElimination }, // clean up left-over accesses before escape analysis
#ifdef J9_PROJECT_SPECIFIC
{ expensiveObjectAllocationGroup },
#endif
{ globalValuePropagation, IfEnabledAndMoreThanOneBlock }, // if inlined a call or an object
{ treeSimplification, IfEnabled },
{ catchBlockRemoval, IfEnabled }, // if checks were removed
{ osrExceptionEdgeRemoval }, // most inlining is done by now
#ifdef J9_PROJECT_SPECIFIC
{ redundantMonitorElimination, IfEnabled }, // performed if method has monitors
{ redundantMonitorElimination, IfEnabled }, // performed if method has monitors
#endif
{ globalValuePropagation, IfEnabledAndMoreThanOneBlock }, // mark monitors requiring sync
{ virtualGuardTailSplitter, IfEnabled }, // merge virtual guards
{ CFGSimplification },
{ endGroup }
};
const OptimizationStrategy eachExpensiveGlobalValuePropagationOpts[] =
{
//{ blockSplitter },
/// { innerPreexistence },
{ globalValuePropagation, IfMoreThanOneBlock },
{ treeSimplification, IfEnabled },
{ veryCheapGlobalValuePropagationGroup, IfEnabled }, // enabled by blockversioner
{ deadTreesElimination }, // clean up left-over accesses before escape analysis
#ifdef J9_PROJECT_SPECIFIC
{ expensiveObjectAllocationGroup },
#endif
{ eachExpensiveGlobalValuePropagationGroup, IfEnabled }, // if inlining was done
{ endGroup }
};
const OptimizationStrategy veryExpensiveGlobalValuePropagationOpts[] =
{
{ eachExpensiveGlobalValuePropagationGroup },
//{ basicBlockHoisting, }, // merge block into pred and prepare for local dead store
{ localDeadStoreElimination }, // remove local/parm/some field stores
{ treeSimplification, IfEnabled },
{ catchBlockRemoval, IfEnabled }, // if checks were removed
{ osrExceptionEdgeRemoval }, // most inlining is done by now
#ifdef J9_PROJECT_SPECIFIC
{ redundantMonitorElimination, IfEnabled }, // performed if method has monitors
{ redundantMonitorElimination, IfEnabled }, // performed if method has monitors
#endif
{ globalValuePropagation, IfEnabledAndMoreThanOneBlock }, // mark monitors requiring syncs
{ virtualGuardTailSplitter, IfEnabled }, // merge virtual guards
{ CFGSimplification },
{ endGroup }
};
const OptimizationStrategy partialRedundancyEliminationOpts[] =
{
{ globalValuePropagation, IfMoreThanOneBlock }, // GVP (before PRE)
{ deadTreesElimination },
{ treeSimplification, IfEnabled },
{ treeSimplification }, // might fold expressions created by versioning/induction variables
{ treeSimplification, IfEnabled }, // Array length simplification shd be followed by reassoc before PRE
{ reorderArrayExprGroup, IfEnabled }, // maximize opportunities hoisting of index array expressions
{ partialRedundancyElimination, IfMoreThanOneBlock},
{ localCSE, }, // common up expression which can benefit EA
{ catchBlockRemoval, IfEnabled }, // if checks were removed
{ deadTreesElimination, IfEnabled }, // if checks were removed
{ compactNullChecks, IfEnabled }, // PRE creates explicit null checks in large numbers
{ localReordering, IfEnabled }, // PRE may create temp stores that can be moved closer to uses
{ globalValuePropagation, IfEnabledAndMoreThanOneBlockMarkLastRun }, // GVP (after PRE)
#ifdef J9_PROJECT_SPECIFIC
{ preEscapeAnalysis, IfOSR },
{ escapeAnalysis, IfEAOpportunitiesMarkLastRun }, // to stack-allocate after loopversioner and localCSE
{ postEscapeAnalysis, IfOSR },
#endif
{ basicBlockOrdering, IfLoops }, // early ordering with no extension
{ globalCopyPropagation, IfLoops }, // for Loop Versioner
{ loopVersionerGroup, IfEnabledAndLoops },
{ treeSimplification, IfEnabled }, // loop reduction block should be after PRE so that privatization
{ treesCleansing }, // clean up gotos in code and convert to fall-throughs for loop reducer
{ redundantGotoElimination, IfNotJitProfiling }, // clean up for loop reducer. Note: NEVER run this before PRE
{ loopReduction, IfLoops }, // will have happened and it needs to be before loopStrider
{ localCSE, IfEnabled }, // so that it will not get confused with internal pointers.
{ globalDeadStoreElimination, IfEnabledAndMoreThanOneBlock}, // It may need to be run twice if deadstore elimination is required,
{ deadTreesElimination, }, // but this only happens for unsafe access (arraytranslate.twoToOne)
{ loopReduction, }, // and so is conditional
#ifdef J9_PROJECT_SPECIFIC
{ idiomRecognition, IfLoopsAndNotProfiling }, // after loopReduction!!
#endif
{ lastLoopVersionerGroup, IfLoops },
{ treeSimplification, }, // cleanup before AutoVectorization
{ deadTreesElimination, }, // cleanup before AutoVectorization
{ inductionVariableAnalysis, IfLoopsAndNotProfiling },
#ifdef J9_PROJECT_SPECIFIC
{ SPMDKernelParallelization, IfLoops },
#endif
{ loopStrider, IfLoops },
{ treeSimplification, IfEnabled },
{ lastLoopVersionerGroup, IfEnabledAndLoops },
{ treeSimplification, }, // cleanup before strider
{ localCSE, }, // cleanup before strider so it will not be confused by commoned nodes (mandatory to run local CSE before strider)
{ deadTreesElimination, }, // cleanup before strider so that dead stores can be eliminated more effcientlly (i.e. false uses are not seen)
{ loopStrider, IfLoops },
{ treeSimplification, IfEnabled }, // cleanup after strider
{ loopInversion, IfLoops },
{ endGroup }
};
const OptimizationStrategy methodHandleInvokeInliningOpts[] =
{
{ treeSimplification, }, // Supply some known-object info, and help CSE
{ localCSE, }, // Especially copy propagation to replace temps with more descriptive trees
{ localValuePropagation }, // Propagate known-object info and derive more specific archetype specimen symbols for inlining
#ifdef J9_PROJECT_SPECIFIC
{ targetedInlining, },
#endif
{ deadTreesElimination },
{ methodHandleInvokeInliningGroup, IfEnabled }, // Repeat as required to inline all the MethodHandle.invoke calls we can afford
{ endGroup },
};
const OptimizationStrategy earlyGlobalOpts[] =
{
{ methodHandleInvokeInliningGroup, IfMethodHandleInvokes },
#ifdef J9_PROJECT_SPECIFIC
{ inlining },
#endif
{ osrExceptionEdgeRemoval }, // most inlining is done by now
//{ basicBlockOrdering, IfLoops }, // early ordering with no extension
{ treeSimplification, IfEnabled },
{ compactNullChecks }, // cleans up after inlining; MUST be done before PRE
#ifdef J9_PROJECT_SPECIFIC
{ virtualGuardTailSplitter }, // merge virtual guards
{ treeSimplification },
{ CFGSimplification },
#endif
{ endGroup }
};
const OptimizationStrategy earlyLocalOpts[] =
{
{ localValuePropagation },
//{ localValuePropagationGroup },
{ localReordering },
{ switchAnalyzer, },
{ treeSimplification, IfEnabled }, // simplify any exprs created by LCP/LCSE
#ifdef J9_PROJECT_SPECIFIC
{ catchBlockRemoval }, // if all possible exceptions in a try were removed by inlining/LCP/LCSE
#endif
{ deadTreesElimination }, // remove any anchored dead loads
{ profiledNodeVersioning },
{ endGroup }
};
const OptimizationStrategy isolatedStoreOpts[] =
{
{ isolatedStoreElimination },
{ deadTreesElimination },
{ endGroup }
};
const OptimizationStrategy globalDeadStoreOpts[] =
{
{ globalDeadStoreElimination, IfMoreThanOneBlock },
{ deadTreesElimination },
{ endGroup }
};
const OptimizationStrategy loopAliasRefinerOpts[] =
{
{ inductionVariableAnalysis, IfLoops },
{ loopCanonicalization },
{ globalValuePropagation, IfMoreThanOneBlock },// create ivs
{ loopAliasRefiner },
{ endGroup }
};
const OptimizationStrategy loopSpecializerOpts[] =
{
{ inductionVariableAnalysis, IfLoops },
{ loopCanonicalization },
{ loopSpecializer },
{ endGroup }
};
const OptimizationStrategy loopVersionerOpts[] =
{
{ basicBlockOrdering },
{ inductionVariableAnalysis, IfLoops },
{ loopCanonicalization },
{ loopVersioner },
{ endGroup }
};
const OptimizationStrategy lastLoopVersionerOpts[] =
{
{ inductionVariableAnalysis, IfLoops },
{ loopCanonicalization },
{ loopVersioner, MarkLastRun },
{ endGroup }
};
const OptimizationStrategy loopCanonicalizationOpts[] =
{
{ globalCopyPropagation, IfLoops }, // propagate copies to allow better invariance detection
{ loopVersionerGroup },
{ deadTreesElimination }, // remove dead anchors created by check removal (versioning)
//{ loopStrider }, // use canonicalized loop to insert initializations
{ treeSimplification }, // remove unreachable blocks (with nullchecks etc.) left by LoopVersioner
{ fieldPrivatization }, // use canonicalized loop to privatize fields
{ treeSimplification }, // might fold expressions created by versioning/induction variables
{ loopSpecializerGroup, IfEnabledAndLoops }, // specialize the versioned loop if possible
{ deadTreesElimination, IfEnabledAndLoops }, // remove dead anchors created by specialization
{ treeSimplification, IfEnabledAndLoops }, // might fold expressions created by specialization
{ endGroup }
};
const OptimizationStrategy stripMiningOpts[] =
{
{ inductionVariableAnalysis, IfLoops },
{ loopCanonicalization },
{ inductionVariableAnalysis },
{ stripMining },
{ endGroup }
};
const OptimizationStrategy blockManipulationOpts[] =
{
// { generalLoopUnroller, IfLoops }, //Unroll Loops
{ coldBlockOutlining } ,
{ CFGSimplification, IfNotJitProfiling },
{ basicBlockHoisting, IfNotJitProfiling },
{ treeSimplification },
{ redundantGotoElimination, IfNotJitProfiling }, // redundant gotos gone
{ treesCleansing }, // maximize fall throughs
{ virtualGuardHeadMerger },
{ basicBlockExtension, MarkLastRun}, // extend blocks; move trees around if reqd
{ treeSimplification }, // revisit; not really required ?
{ basicBlockPeepHole, IfEnabled },
{ endGroup }
};
const OptimizationStrategy eachLocalAnalysisPassOpts[] =
{
{ localValuePropagationGroup, IfEnabled },
#ifdef J9_PROJECT_SPECIFIC
{ arraycopyTransformation },
#endif
{ treeSimplification, IfEnabled },
{ localCSE, IfEnabled },
{ localDeadStoreElimination, IfEnabled }, // after local copy/value propagation
{ rematerialization, IfEnabled },
{ compactNullChecks, IfEnabled },
{ deadTreesElimination, IfEnabled }, // remove dead anchors created by check/store removal
//{ eachLocalAnalysisPassGroup, IfEnabled }, // if another pass requested
{ endGroup }
};
const OptimizationStrategy lateLocalOpts[] =
{
{ OMR::eachLocalAnalysisPassGroup },
{ OMR::andSimplification }, // needs commoning across blocks to work well; must be done after versioning
{ OMR::treesCleansing }, // maximize fall throughs after LCP has converted some conditions to gotos
{ OMR::eachLocalAnalysisPassGroup },
{ OMR::localDeadStoreElimination }, // after latest copy propagation
{ OMR::deadTreesElimination }, // remove dead anchors created by check/store removal
{ OMR::globalDeadStoreGroup, },
{ OMR::eachLocalAnalysisPassGroup },
{ OMR::treeSimplification },
{ OMR::endGroup }
};
static const OptimizationStrategy tacticalGlobalRegisterAllocatorOpts[] =
{
{ OMR::inductionVariableAnalysis, OMR::IfLoops },
{ OMR::loopCanonicalization, OMR::IfLoops },
{ OMR::liveRangeSplitter, OMR::IfLoops },
{ OMR::redundantGotoElimination, OMR::IfNotJitProfiling }, // need to be run before global register allocator
{ OMR::treeSimplification, OMR::MarkLastRun }, // Cleanup the trees after redundantGotoElimination
{ OMR::tacticalGlobalRegisterAllocator, OMR::IfEnabled },
{ OMR::localCSE },
// { isolatedStoreGroup, IfEnabled }, // if global register allocator created stores from registers
{ OMR::globalCopyPropagation, OMR::IfEnabledAndMoreThanOneBlock }, // if live range splitting created copies
{ OMR::localCSE }, // localCSE after post-PRE + post-GRA globalCopyPropagation to clean up whole expression remat (rtc 64659)
{ OMR::globalDeadStoreGroup, OMR::IfEnabled },
{ OMR::redundantGotoElimination, OMR::IfEnabledAndNotJitProfiling }, // if global register allocator created new block
{ OMR::deadTreesElimination }, // remove dangling GlRegDeps
{ OMR::deadTreesElimination, OMR::IfEnabled }, // remove dead RegStores produced by previous deadTrees pass
{ OMR::deadTreesElimination, OMR::IfEnabled }, // remove dead RegStores produced by previous deadTrees pass
{ OMR::endGroup }
};
const OptimizationStrategy finalGlobalOpts[] =
{
{ rematerialization },
{ compactNullChecks, IfEnabled },
{ deadTreesElimination },
//{ treeSimplification, IfEnabled },
{ localLiveRangeReduction },
{ compactLocals, IfNotJitProfiling }, // analysis results are invalidated by profilingGroup
#ifdef J9_PROJECT_SPECIFIC
{ globalLiveVariablesForGC },
#endif
{ endGroup }
};
// **************************************************************************
//
// Strategy that is run for each non-peeking IlGeneration - this allows early
// optimizations to be run even before the IL is available to Inliner
//
// **************************************************************************
static const OptimizationStrategy ilgenStrategyOpts[] =
{
#ifdef J9_PROJECT_SPECIFIC
{ osrLiveRangeAnalysis, IfOSR },
{ osrDefAnalysis, IfInvoluntaryOSR },
{ methodHandleTransformer, },
{ varHandleTransformer, MustBeDone },
{ handleRecompilationOps, MustBeDone },
{ unsafeFastPath },
{ recognizedCallTransformer },
{ coldBlockMarker },
{ CFGSimplification },
{ allocationSinking, IfNews },
{ invariantArgumentPreexistence, IfNotClassLoadPhaseAndNotProfiling }, // Should not run if a recompilation is possible
#endif
{ endOpts },
};
// **********************************************************
//
// OMR Strategies
//
// **********************************************************
static const OptimizationStrategy omrNoOptStrategyOpts[] =
{
{ endOpts },
};
static const OptimizationStrategy omrColdStrategyOpts[] =
{
{ basicBlockExtension },
{ localCSE },
//{ localValuePropagation },
{ treeSimplification },
{ localCSE },
{ endOpts },
};
static const OptimizationStrategy omrWarmStrategyOpts[] =
{
{ basicBlockExtension },
{ localCSE },
//{ localValuePropagation },
{ treeSimplification },
{ localCSE },
{ localDeadStoreElimination },
{ globalDeadStoreGroup },
{ endOpts },
};
static const OptimizationStrategy omrHotStrategyOpts[] =
{
{ OMR::coldBlockOutlining },
{ OMR::earlyGlobalGroup },
{ OMR::earlyLocalGroup },
{ OMR::andSimplification }, // needs commoning across blocks to work well; must be done after versioning
{ OMR::stripMiningGroup, }, // strip mining in loops
{ OMR::loopReplicator, }, // tail-duplication in loops
{ OMR::blockSplitter, }, // treeSimplification + blockSplitter + VP => opportunity for EA
{ OMR::arrayPrivatizationGroup, }, // must preceed escape analysis
{ OMR::veryExpensiveGlobalValuePropagationGroup },
{ OMR::globalDeadStoreGroup, },
{ OMR::globalCopyPropagation, },
{ OMR::loopCanonicalizationGroup, }, // canonicalize loops (improve fall throughs)
{ OMR::expressionsSimplification, },
{ OMR::partialRedundancyEliminationGroup },
{ OMR::globalDeadStoreElimination, },
{ OMR::inductionVariableAnalysis, },
{ OMR::loopSpecializerGroup, },
{ OMR::inductionVariableAnalysis, },
{ OMR::generalLoopUnroller, }, // unroll Loops
{ OMR::blockSplitter, OMR::MarkLastRun },
{ OMR::blockManipulationGroup },
{ OMR::lateLocalGroup },
{ OMR::redundantAsyncCheckRemoval }, // optimize async check placement
#ifdef J9_PROJECT_SPECIFIC
{ OMR::recompilationModifier, }, // do before GRA to avoid commoning of longs afterwards
#endif
{ OMR::globalCopyPropagation, }, // Can produce opportunities for store sinking
{ OMR::generalStoreSinking },
{ OMR::localCSE, }, //common up lit pool refs in the same block
{ OMR::treeSimplification, }, // cleanup the trees after sunk store and localCSE
{ OMR::trivialBlockExtension },
{ OMR::localDeadStoreElimination, }, //remove the astore if no literal pool is required
{ OMR::localCSE, }, //common up lit pool refs in the same block
{ OMR::arraysetStoreElimination },
{ OMR::localValuePropagation, OMR::MarkLastRun },
{ OMR::checkcastAndProfiledGuardCoalescer },
{ OMR::osrExceptionEdgeRemoval, OMR::MarkLastRun },
{ OMR::tacticalGlobalRegisterAllocatorGroup, },
{ OMR::globalDeadStoreElimination, }, // global dead store removal
{ OMR::deadTreesElimination }, // cleanup after dead store removal
{ OMR::compactNullChecks }, // cleanup at the end
{ OMR::finalGlobalGroup }, // done just before codegen
{ OMR::regDepCopyRemoval },
{ endOpts },
};
// The following arrays of Optimization pointers are externally declared in OptimizerStrategies.hpp
// This allows frontends to assist in selection of optimizer strategies.
// (They cannot be made 'static const')
const OptimizationStrategy *omrCompilationStrategies[] =
{
omrNoOptStrategyOpts, // empty strategy
omrColdStrategyOpts, // << specialized
omrWarmStrategyOpts, // << specialized
omrHotStrategyOpts, // currently used to test available omr optimizations
};
#ifdef OPT_TIMING // provide statistics on time taken by individual optimizations
TR_Stats statOptTiming[OMR::numOpts];
TR_Stats statStructuralAnalysisTiming("Structural Analysis");
TR_Stats statUseDefsTiming("Use Defs");
TR_Stats statGlobalValNumTiming("Global Value Numbering");
#endif // OPT_TIMING
TR::Optimizer *OMR::Optimizer::createOptimizer(TR::Compilation *comp, TR::ResolvedMethodSymbol *methodSymbol, bool isIlGen)
{
// returns IL optimizer, performs tree-to-tree optimizing transformations.
if (isIlGen)
return new (comp->trHeapMemory()) TR::Optimizer(comp, methodSymbol, isIlGen, ilgenStrategyOpts);
if (comp->getOptions()->getCustomStrategy())
{
if (comp->getOption(TR_TraceOptDetails))
traceMsg(comp, "Using custom optimization strategy\n");
// Reformat custom strategy as array of Optimization rather than array of int32_t
//
int32_t *srcStrategy = comp->getOptions()->getCustomStrategy();
int32_t size = comp->getOptions()->getCustomStrategySize();
OptimizationStrategy *customStrategy = (OptimizationStrategy *)comp->trMemory()->allocateHeapMemory(size * sizeof(customStrategy[0]));
for (int32_t i = 0; i < size; i++)
{
OptimizationStrategy o = { (OMR::Optimizations)(srcStrategy[i] & TR::Options::OptNumMask) };
if (srcStrategy[i] & TR::Options::MustBeDone)
o._options = MustBeDone;
customStrategy[i] = o;
}
return new (comp->trHeapMemory()) TR::Optimizer(comp, methodSymbol, isIlGen, customStrategy);
}
TR::Optimizer *optimizer = new (comp->trHeapMemory()) TR::Optimizer(
comp,
methodSymbol,
isIlGen,
TR::Optimizer::optimizationStrategy(comp),
TR::Optimizer::valueNumberInfoBuildType());
return optimizer;
}
// ************************************************************************
//
// Implementation of TR::Optimizer
//
// ************************************************************************
OMR::Optimizer::Optimizer(TR::Compilation *comp, TR::ResolvedMethodSymbol *methodSymbol, bool isIlGen,
const OptimizationStrategy *strategy, uint16_t VNType)
: _compilation(comp),
_cg(comp->cg()),
_trMemory(comp->trMemory()),
_methodSymbol(methodSymbol),
_isIlGen(isIlGen),
_strategy(strategy),
_vnInfoType(VNType),
_symReferencesTable(NULL),
_useDefInfo(NULL),
_valueNumberInfo(NULL),
_aliasSetsAreValid(false),
_cantBuildGlobalsUseDefInfo(false),
_cantBuildLocalsUseDefInfo(false),
_cantBuildGlobalsValueNumberInfo(false),
_cantBuildLocalsValueNumberInfo(false),
_canRunBlockByBlockOptimizations(true),
_cachedExtendedBBInfoValid(false),
_inlineSynchronized(true),
_enclosingFinallyBlock(NULL),
_eliminatedCheckcastNodes(comp->trMemory()),
_classPointerNodes(comp->trMemory()),
_optMessageIndex(0),
_seenBlocksGRA(NULL),
_resetExitsGRA(NULL),
_successorBitsGRA(NULL),
_stackedOptimizer(false),
_firstTimeStructureIsBuilt(true),
_disableLoopOptsThatCanCreateLoops(false)
{
// zero opts table
memset(_opts, 0, sizeof(_opts));
/*
* Allow downstream projects to disable the default initialization of optimizations
* and allow them to take full control over this process. This can be an advantage
* if they don't use all of the optimizations initialized here as they can avoid
* getting linked in to the binary in their entirety.
*/
#if !defined(TR_OVERRIDE_OPTIMIZATION_INITIALIZATION)
// initialize OMR optimizations
_opts[OMR::andSimplification] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_SimplifyAnds::create, OMR::andSimplification);
_opts[OMR::arraysetStoreElimination] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_ArraysetStoreElimination::create, OMR::arraysetStoreElimination);
_opts[OMR::asyncCheckInsertion] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_AsyncCheckInsertion::create, OMR::asyncCheckInsertion);
_opts[OMR::basicBlockExtension] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_ExtendBasicBlocks::create, OMR::basicBlockExtension);
_opts[OMR::basicBlockHoisting] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_HoistBlocks::create, OMR::basicBlockHoisting);
_opts[OMR::basicBlockOrdering] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_OrderBlocks::create, OMR::basicBlockOrdering);
_opts[OMR::basicBlockPeepHole] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_PeepHoleBasicBlocks::create, OMR::basicBlockPeepHole);
_opts[OMR::blockShuffling] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_BlockShuffling::create, OMR::blockShuffling);
_opts[OMR::blockSplitter] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_BlockSplitter::create, OMR::blockSplitter);
_opts[OMR::catchBlockRemoval] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_CatchBlockRemover::create, OMR::catchBlockRemoval);
_opts[OMR::CFGSimplification] =
new (comp->allocator()) TR::OptimizationManager(self(), TR::CFGSimplifier::create, OMR::CFGSimplification);
_opts[OMR::checkcastAndProfiledGuardCoalescer] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_CheckcastAndProfiledGuardCoalescer::create, OMR::checkcastAndProfiledGuardCoalescer);
_opts[OMR::coldBlockMarker] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_ColdBlockMarker::create, OMR::coldBlockMarker);
_opts[OMR::coldBlockOutlining] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_ColdBlockOutlining::create, OMR::coldBlockOutlining);
_opts[OMR::compactLocals] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_CompactLocals::create, OMR::compactLocals);
_opts[OMR::compactNullChecks] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_CompactNullChecks::create, OMR::compactNullChecks);
_opts[OMR::deadTreesElimination] =
new (comp->allocator()) TR::OptimizationManager(self(), TR::DeadTreesElimination::create, OMR::deadTreesElimination);
_opts[OMR::expressionsSimplification] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_ExpressionsSimplification::create, OMR::expressionsSimplification);
_opts[OMR::generalLoopUnroller] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_GeneralLoopUnroller::create, OMR::generalLoopUnroller);
_opts[OMR::globalCopyPropagation] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_CopyPropagation::create, OMR::globalCopyPropagation);
_opts[OMR::globalDeadStoreElimination] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_DeadStoreElimination::create, OMR::globalDeadStoreElimination);
_opts[OMR::inlining] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_TrivialInliner::create, OMR::inlining);
_opts[OMR::innerPreexistence] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_InnerPreexistence::create, OMR::innerPreexistence);
_opts[OMR::invariantArgumentPreexistence] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_InvariantArgumentPreexistence::create, OMR::invariantArgumentPreexistence);
_opts[OMR::loadExtensions] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_LoadExtensions::create, OMR::loadExtensions);
_opts[OMR::localCSE] =
new (comp->allocator()) TR::OptimizationManager(self(), TR::LocalCSE::create, OMR::localCSE);
_opts[OMR::localDeadStoreElimination] =
new (comp->allocator()) TR::OptimizationManager(self(), TR::LocalDeadStoreElimination::create, OMR::localDeadStoreElimination);
_opts[OMR::localLiveRangeReduction] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_LocalLiveRangeReduction::create, OMR::localLiveRangeReduction);
_opts[OMR::localReordering] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_LocalReordering::create, OMR::localReordering);
_opts[OMR::loopCanonicalization] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_LoopCanonicalizer::create, OMR::loopCanonicalization);
_opts[OMR::loopVersioner] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_LoopVersioner::create, OMR::loopVersioner);
_opts[OMR::loopReduction] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_LoopReducer::create, OMR::loopReduction);
_opts[OMR::loopReplicator] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_LoopReplicator::create, OMR::loopReplicator);
_opts[OMR::profiledNodeVersioning] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_ProfiledNodeVersioning::create, OMR::profiledNodeVersioning);
_opts[OMR::redundantAsyncCheckRemoval] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_RedundantAsyncCheckRemoval::create, OMR::redundantAsyncCheckRemoval);
_opts[OMR::redundantGotoElimination] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_EliminateRedundantGotos::create, OMR::redundantGotoElimination);
_opts[OMR::rematerialization] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_Rematerialization::create, OMR::rematerialization);
_opts[OMR::treesCleansing] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_CleanseTrees::create, OMR::treesCleansing);
_opts[OMR::treeSimplification] =
new (comp->allocator()) TR::OptimizationManager(self(), TR::Simplifier::create, OMR::treeSimplification);
_opts[OMR::trivialBlockExtension] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_TrivialBlockExtension::create, OMR::trivialBlockExtension);
_opts[OMR::trivialDeadTreeRemoval] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_TrivialDeadTreeRemoval::create, OMR::trivialDeadTreeRemoval);
_opts[OMR::virtualGuardHeadMerger] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_VirtualGuardHeadMerger::create, OMR::virtualGuardHeadMerger);
_opts[OMR::virtualGuardTailSplitter] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_VirtualGuardTailSplitter::create, OMR::virtualGuardTailSplitter);
_opts[OMR::generalStoreSinking] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_GeneralSinkStores::create, OMR::generalStoreSinking);
_opts[OMR::globalValuePropagation] =
new (comp->allocator()) TR::OptimizationManager(self(), TR::GlobalValuePropagation::create, OMR::globalValuePropagation);
_opts[OMR::localValuePropagation] =
new (comp->allocator()) TR::OptimizationManager(self(), TR::LocalValuePropagation::create, OMR::localValuePropagation);
_opts[OMR::redundantInductionVarElimination] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_RedundantInductionVarElimination::create, OMR::redundantInductionVarElimination);
_opts[OMR::partialRedundancyElimination] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_PartialRedundancy::create, OMR::partialRedundancyElimination);
_opts[OMR::loopInversion] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_LoopInverter::create, OMR::loopInversion);
_opts[OMR::inductionVariableAnalysis] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_InductionVariableAnalysis::create, OMR::inductionVariableAnalysis);
_opts[OMR::osrExceptionEdgeRemoval] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_OSRExceptionEdgeRemoval::create, OMR::osrExceptionEdgeRemoval);
_opts[OMR::regDepCopyRemoval] =
new (comp->allocator()) TR::OptimizationManager(self(), TR::RegDepCopyRemoval::create, OMR::regDepCopyRemoval);
_opts[OMR::stripMining] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_StripMiner::create, OMR::stripMining);
_opts[OMR::fieldPrivatization] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_FieldPrivatizer::create, OMR::fieldPrivatization);
_opts[OMR::reorderArrayIndexExpr] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_IndexExprManipulator::create, OMR::reorderArrayIndexExpr);
_opts[OMR::loopStrider] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_LoopStrider::create, OMR::loopStrider);
_opts[OMR::osrDefAnalysis] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_OSRDefAnalysis::create, OMR::osrDefAnalysis);
_opts[OMR::osrLiveRangeAnalysis] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_OSRLiveRangeAnalysis::create, OMR::osrLiveRangeAnalysis);
_opts[OMR::tacticalGlobalRegisterAllocator] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_GlobalRegisterAllocator::create, OMR::tacticalGlobalRegisterAllocator);
_opts[OMR::liveRangeSplitter] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_LiveRangeSplitter::create, OMR::liveRangeSplitter);
_opts[OMR::loopSpecializer] =
new (comp->allocator()) TR::OptimizationManager(self(), TR_LoopSpecializer::create, OMR::loopSpecializer);
_opts[OMR::recognizedCallTransformer] =
new (comp->allocator()) TR::OptimizationManager(self(), TR::RecognizedCallTransformer::create, OMR::recognizedCallTransformer);
_opts[OMR::switchAnalyzer] =
new (comp->allocator()) TR::OptimizationManager(self(), TR::SwitchAnalyzer::create, OMR::switchAnalyzer);
// NOTE: Please add new OMR optimizations here!
// initialize OMR optimization groups
_opts[OMR::globalDeadStoreGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::globalDeadStoreGroup, globalDeadStoreOpts);
_opts[OMR::loopCanonicalizationGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::loopCanonicalizationGroup, loopCanonicalizationOpts);
_opts[OMR::loopVersionerGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::loopVersionerGroup, loopVersionerOpts);
_opts[OMR::lastLoopVersionerGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::lastLoopVersionerGroup, lastLoopVersionerOpts);
_opts[OMR::methodHandleInvokeInliningGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::methodHandleInvokeInliningGroup, methodHandleInvokeInliningOpts);
_opts[OMR::earlyGlobalGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::earlyGlobalGroup, earlyGlobalOpts);
_opts[OMR::earlyLocalGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::earlyLocalGroup, earlyLocalOpts);
_opts[OMR::stripMiningGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::stripMiningGroup, stripMiningOpts);
_opts[OMR::arrayPrivatizationGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::arrayPrivatizationGroup, arrayPrivatizationOpts);
_opts[OMR::veryCheapGlobalValuePropagationGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::veryCheapGlobalValuePropagationGroup, veryCheapGlobalValuePropagationOpts);
_opts[OMR::eachExpensiveGlobalValuePropagationGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::eachExpensiveGlobalValuePropagationGroup, eachExpensiveGlobalValuePropagationOpts);
_opts[OMR::veryExpensiveGlobalValuePropagationGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::veryExpensiveGlobalValuePropagationGroup, veryExpensiveGlobalValuePropagationOpts);
_opts[OMR::loopSpecializerGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::loopSpecializerGroup, loopSpecializerOpts);
_opts[OMR::lateLocalGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::lateLocalGroup, lateLocalOpts);
_opts[OMR::eachLocalAnalysisPassGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::eachLocalAnalysisPassGroup, eachLocalAnalysisPassOpts);
_opts[OMR::tacticalGlobalRegisterAllocatorGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::tacticalGlobalRegisterAllocatorGroup, tacticalGlobalRegisterAllocatorOpts);
_opts[OMR::partialRedundancyEliminationGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::partialRedundancyEliminationGroup, partialRedundancyEliminationOpts);
_opts[OMR::reorderArrayExprGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::reorderArrayExprGroup, reorderArrayIndexOpts);
_opts[OMR::blockManipulationGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::blockManipulationGroup, blockManipulationOpts);
_opts[OMR::localValuePropagationGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::localValuePropagationGroup, localValuePropagationOpts);
_opts[OMR::finalGlobalGroup] =
new (comp->allocator()) TR::OptimizationManager(self(), NULL, OMR::finalGlobalGroup, finalGlobalOpts);
// NOTE: Please add new OMR optimization groups here!
#endif
}
// Note: optimizer_name array needs to match Optimizations enum defined
// in compiler/optimizer/Optimizations.hpp
static const char * optimizer_name[] =
{
#define OPTIMIZATION(name) #name,
#define OPTIMIZATION_ENUM_ONLY(entry) "****",
#include "optimizer/Optimizations.enum"
OPTIMIZATION_ENUM_ONLY(numOpts)
#include "optimizer/OptimizationGroups.enum"
OPTIMIZATION_ENUM_ONLY(numGroups)
#undef OPTIMIZATION
#undef OPTIMIZATION_ENUM_ONLY
};
const char *
OMR::Optimizer::getOptimizationName(OMR::Optimizations opt)
{
return ::optimizer_name[opt];
}
bool
OMR::Optimizer::isEnabled(OMR::Optimizations i)
{
if (_opts[i] != NULL)
return _opts[i]->enabled();
return false;
}
TR_Debug *OMR::Optimizer::getDebug()
{
return _compilation->getDebug();
}
void OMR::Optimizer::setCachedExtendedBBInfoValid(bool b)
{
TR_ASSERT(!comp()->isPeekingMethod(), "ERROR: Should not modify _cachedExtendedBBInfoValid while peeking");
_cachedExtendedBBInfoValid = b;
}
TR_UseDefInfo *OMR::Optimizer::setUseDefInfo(TR_UseDefInfo * u)
{
if(_useDefInfo != NULL)
{
dumpOptDetails(comp(), " (Invalidating use/def info)\n");
delete _useDefInfo;
}
return (_useDefInfo = u);
}
TR_ValueNumberInfo *OMR::Optimizer::setValueNumberInfo(TR_ValueNumberInfo *v)
{
if (_valueNumberInfo && !v)
dumpOptDetails(comp(), " (Invalidating value number info)\n");
if (_valueNumberInfo)
delete _valueNumberInfo;
return (_valueNumberInfo = v);
}
TR_UseDefInfo* OMR::Optimizer::createUseDefInfo(TR::Compilation* comp,
bool requiresGlobals, bool prefersGlobals, bool loadsShouldBeDefs, bool cannotOmitTrivialDefs,
bool conversionRegsOnly, bool doCompletion)
{
return new (comp->allocator()) TR_UseDefInfo(comp, comp->getFlowGraph(), self(), requiresGlobals, prefersGlobals, loadsShouldBeDefs,
cannotOmitTrivialDefs, conversionRegsOnly, doCompletion, getCallsAsUses());
}
TR_ValueNumberInfo *OMR::Optimizer::createValueNumberInfo(bool requiresGlobals, bool preferGlobals, bool noUseDefInfo)
{
LexicalTimer t("global value numbering (for globals definitely)", comp()->phaseTimer());
TR::LexicalMemProfiler mp("global value numbering (for globals definitely)", comp()->phaseMemProfiler());
TR_ValueNumberInfo * valueNumberInfo = NULL;
switch(_vnInfoType)
{
case PrePartitionVN:
valueNumberInfo = new (comp()->allocator()) TR_ValueNumberInfo(comp(), self(), requiresGlobals, preferGlobals, noUseDefInfo);
break;
case HashVN:
valueNumberInfo = new (comp()->allocator()) TR_HashValueNumberInfo(comp(), self(), requiresGlobals, preferGlobals, noUseDefInfo);
break;