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📄 AliasAnalysis.h(51.98 KB)
📄 AliasAnalysisEvaluator.h(2.7 KB)
📄 AliasSetTracker.h(15.42 KB)
📄 AssumeBundleQueries.h(6.66 KB)
📄 AssumptionCache.h(8.39 KB)
📄 BasicAliasAnalysis.h(10.2 KB)
📄 BlockFrequencyInfo.h(5.59 KB)
📄 BlockFrequencyInfoImpl.h(56.46 KB)
📄 BranchProbabilityInfo.h(10.1 KB)
📄 CFG.h(7.76 KB)
📄 CFGPrinter.h(9.31 KB)
📄 CFLAliasAnalysisUtils.h(1.66 KB)
📄 CFLAndersAliasAnalysis.h(3.97 KB)
📄 CFLSteensAliasAnalysis.h(4.58 KB)
📄 CGSCCPassManager.h(41.2 KB)
📄 CallGraph.h(18.88 KB)
📄 CallGraphSCCPass.h(5.01 KB)
📄 CallPrinter.h(799 B)
📄 CaptureTracking.h(4.78 KB)
📄 CmpInstAnalysis.h(2.57 KB)
📄 CodeMetrics.h(3.15 KB)
📄 ConstantFolding.h(8.01 KB)
📄 DDG.h(19.15 KB)
📄 DOTGraphTraitsPass.h(5.5 KB)
📄 DemandedBits.h(4.07 KB)
📄 DependenceAnalysis.h(41.83 KB)
📄 DependenceGraphBuilder.h(7.74 KB)
📄 DivergenceAnalysis.h(7.38 KB)
📄 DomPrinter.h(1.04 KB)
📄 DomTreeUpdater.h(13.2 KB)
📄 DominanceFrontier.h(6.63 KB)
📄 DominanceFrontierImpl.h(7.12 KB)
📄 EHPersonalities.h(3.22 KB)
📄 GlobalsModRef.h(5.96 KB)
📄 GuardUtils.h(2.11 KB)
📄 HeatUtils.h(1.16 KB)
📄 IVDescriptors.h(14.56 KB)
📄 IVUsers.h(6.07 KB)
📄 IndirectCallPromotionAnalysis.h(2.61 KB)
📄 IndirectCallVisitor.h(1.16 KB)
📄 InlineAdvisor.h(8.71 KB)
📄 InlineCost.h(11.33 KB)
📄 InlineFeaturesAnalysis.h(1.5 KB)
📄 InlineModelFeatureMaps.h(3.41 KB)
📄 InlineSizeEstimatorAnalysis.h(1.07 KB)
📄 InstructionPrecedenceTracking.h(5.9 KB)
📄 InstructionSimplify.h(13.36 KB)
📄 Interval.h(4.84 KB)
📄 IntervalIterator.h(10.64 KB)
📄 IntervalPartition.h(4.05 KB)
📄 IteratedDominanceFrontier.h(2.62 KB)
📄 LazyBlockFrequencyInfo.h(4.34 KB)
📄 LazyBranchProbabilityInfo.h(4.21 KB)
📄 LazyCallGraph.h(50.13 KB)
📄 LazyValueInfo.h(5.4 KB)
📄 LegacyDivergenceAnalysis.h(2.53 KB)
📄 Lint.h(1.35 KB)
📄 Loads.h(7.86 KB)
📄 LoopAccessAnalysis.h(29.75 KB)
📄 LoopAnalysisManager.h(5.83 KB)
📄 LoopCacheAnalysis.h(11.91 KB)
📄 LoopInfo.h(48.27 KB)
📄 LoopInfoImpl.h(27.14 KB)
📄 LoopIterator.h(8.83 KB)
📄 LoopNestAnalysis.h(5.61 KB)
📄 LoopPass.h(4.29 KB)
📄 LoopUnrollAnalyzer.h(3.42 KB)
📄 MLInlineAdvisor.h(3.48 KB)
📄 MLModelRunner.h(1.16 KB)
📄 MemoryBuiltins.h(13.42 KB)
📄 MemoryDependenceAnalysis.h(20.82 KB)
📄 MemoryLocation.h(10.99 KB)
📄 MemorySSA.h(45.92 KB)
📄 MemorySSAUpdater.h(14.55 KB)
📄 ModuleSummaryAnalysis.h(3.44 KB)
📄 MustExecute.h(20.2 KB)
📄 ObjCARCAliasAnalysis.h(3.35 KB)
📄 ObjCARCAnalysisUtils.h(10.22 KB)
📄 ObjCARCInstKind.h(4.87 KB)
📄 OptimizationRemarkEmitter.h(5.93 KB)
📄 PHITransAddr.h(4.77 KB)
📄 Passes.h(3.88 KB)
📄 PhiValues.h(5.25 KB)
📄 PostDominators.h(3.41 KB)
📄 ProfileSummaryInfo.h(9.3 KB)
📄 PtrUseVisitor.h(9.96 KB)
📄 RegionInfo.h(35.23 KB)
📄 RegionInfoImpl.h(25.16 KB)
📄 RegionIterator.h(14.07 KB)
📄 RegionPass.h(4.05 KB)
📄 RegionPrinter.h(2.25 KB)
📄 ScalarEvolution.h(89.21 KB)
📄 ScalarEvolutionAliasAnalysis.h(2.09 KB)
📄 ScalarEvolutionDivision.h(2.48 KB)
📄 ScalarEvolutionExpressions.h(28.61 KB)
📄 ScalarEvolutionNormalization.h(2.47 KB)
📄 ScopedNoAliasAA.h(2.83 KB)
📄 SparsePropagation.h(19.43 KB)
📄 StackLifetime.h(6.16 KB)
📄 StackSafetyAnalysis.h(4.91 KB)
📄 SyncDependenceAnalysis.h(2.85 KB)
📄 SyntheticCountsUtils.h(1.85 KB)
📄 TargetFolder.h(11.04 KB)
📄 TargetLibraryInfo.def(55.35 KB)
📄 TargetLibraryInfo.h(16.86 KB)
📄 TargetTransformInfo.h(96.51 KB)
📄 TargetTransformInfoImpl.h(37.63 KB)
📄 Trace.h(4.1 KB)
📄 TypeBasedAliasAnalysis.h(3.05 KB)
📄 TypeMetadataUtils.h(1.94 KB)
📁 Utils
📄 ValueLattice.h(15.14 KB)
📄 ValueLatticeUtils.h(1.66 KB)
📄 ValueTracking.h(35.82 KB)
📄 VecFuncs.def(10.94 KB)
📄 VectorUtils.h(37.26 KB)

Editing: IVUsers.h

//===- llvm/Analysis/IVUsers.h - Induction Variable Users -------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements bookkeeping for "interesting" users of expressions
// computed from induction variables.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_ANALYSIS_IVUSERS_H
#define LLVM_ANALYSIS_IVUSERS_H

#include "llvm/Analysis/LoopAnalysisManager.h"
#include "llvm/Analysis/LoopPass.h"
#include "llvm/Analysis/ScalarEvolutionNormalization.h"
#include "llvm/IR/ValueHandle.h"

namespace llvm {

class AssumptionCache;
class DominatorTree;
class Instruction;
class Value;
class ScalarEvolution;
class SCEV;
class IVUsers;
class DataLayout;

/// IVStrideUse - Keep track of one use of a strided induction variable.
/// The Expr member keeps track of the expression, User is the actual user
/// instruction of the operand, and 'OperandValToReplace' is the operand of
/// the User that is the use.
class IVStrideUse final : public CallbackVH, public ilist_node<IVStrideUse> {
  friend class IVUsers;
public:
  IVStrideUse(IVUsers *P, Instruction* U, Value *O)
    : CallbackVH(U), Parent(P), OperandValToReplace(O) {
  }

/// getUser - Return the user instruction for this use.
  Instruction *getUser() const {
    return cast<Instruction>(getValPtr());
  }

/// setUser - Assign a new user instruction for this use.
  void setUser(Instruction *NewUser) {
    setValPtr(NewUser);
  }

/// getOperandValToReplace - Return the Value of the operand in the user
  /// instruction that this IVStrideUse is representing.
  Value *getOperandValToReplace() const {
    return OperandValToReplace;
  }

/// setOperandValToReplace - Assign a new Value as the operand value
  /// to replace.
  void setOperandValToReplace(Value *Op) {
    OperandValToReplace = Op;
  }

/// getPostIncLoops - Return the set of loops for which the expression has
  /// been adjusted to use post-inc mode.
  const PostIncLoopSet &getPostIncLoops() const {
    return PostIncLoops;
  }

/// transformToPostInc - Transform the expression to post-inc form for the
  /// given loop.
  void transformToPostInc(const Loop *L);

private:
  /// Parent - a pointer to the IVUsers that owns this IVStrideUse.
  IVUsers *Parent;

/// OperandValToReplace - The Value of the operand in the user instruction
  /// that this IVStrideUse is representing.
  WeakTrackingVH OperandValToReplace;

/// PostIncLoops - The set of loops for which Expr has been adjusted to
  /// use post-inc mode. This corresponds with SCEVExpander's post-inc concept.
  PostIncLoopSet PostIncLoops;

/// Deleted - Implementation of CallbackVH virtual function to
  /// receive notification when the User is deleted.
  void deleted() override;
};

class IVUsers {
  friend class IVStrideUse;
  Loop *L;
  AssumptionCache *AC;
  LoopInfo *LI;
  DominatorTree *DT;
  ScalarEvolution *SE;
  SmallPtrSet<Instruction*, 16> Processed;

/// IVUses - A list of all tracked IV uses of induction variable expressions
  /// we are interested in.
  ilist<IVStrideUse> IVUses;

// Ephemeral values used by @llvm.assume in this function.
  SmallPtrSet<const Value *, 32> EphValues;

public:
  IVUsers(Loop *L, AssumptionCache *AC, LoopInfo *LI, DominatorTree *DT,
          ScalarEvolution *SE);

IVUsers(IVUsers &&X)
      : L(std::move(X.L)), AC(std::move(X.AC)), DT(std::move(X.DT)),
        SE(std::move(X.SE)), Processed(std::move(X.Processed)),
        IVUses(std::move(X.IVUses)), EphValues(std::move(X.EphValues)) {
    for (IVStrideUse &U : IVUses)
      U.Parent = this;
  }
  IVUsers(const IVUsers &) = delete;
  IVUsers &operator=(IVUsers &&) = delete;
  IVUsers &operator=(const IVUsers &) = delete;

Loop *getLoop() const { return L; }

/// AddUsersIfInteresting - Inspect the specified Instruction.  If it is a
  /// reducible SCEV, recursively add its users to the IVUsesByStride set and
  /// return true.  Otherwise, return false.
  bool AddUsersIfInteresting(Instruction *I);

IVStrideUse &AddUser(Instruction *User, Value *Operand);

/// getReplacementExpr - Return a SCEV expression which computes the
  /// value of the OperandValToReplace of the given IVStrideUse.
  const SCEV *getReplacementExpr(const IVStrideUse &IU) const;

/// getExpr - Return the expression for the use.
  const SCEV *getExpr(const IVStrideUse &IU) const;

const SCEV *getStride(const IVStrideUse &IU, const Loop *L) const;

typedef ilist<IVStrideUse>::iterator iterator;
  typedef ilist<IVStrideUse>::const_iterator const_iterator;
  iterator begin() { return IVUses.begin(); }
  iterator end()   { return IVUses.end(); }
  const_iterator begin() const { return IVUses.begin(); }
  const_iterator end() const   { return IVUses.end(); }
  bool empty() const { return IVUses.empty(); }

bool isIVUserOrOperand(Instruction *Inst) const {
    return Processed.count(Inst);
  }

void releaseMemory();

void print(raw_ostream &OS, const Module * = nullptr) const;

/// dump - This method is used for debugging.
  void dump() const;

protected:
  bool AddUsersImpl(Instruction *I, SmallPtrSetImpl<Loop*> &SimpleLoopNests);
};

Pass *createIVUsersPass();

class IVUsersWrapperPass : public LoopPass {
  std::unique_ptr<IVUsers> IU;

public:
  static char ID;

IVUsersWrapperPass();

IVUsers &getIU() { return *IU; }
  const IVUsers &getIU() const { return *IU; }

void getAnalysisUsage(AnalysisUsage &AU) const override;

bool runOnLoop(Loop *L, LPPassManager &LPM) override;

void releaseMemory() override;

void print(raw_ostream &OS, const Module * = nullptr) const override;
};

/// Analysis pass that exposes the \c IVUsers for a loop.
class IVUsersAnalysis : public AnalysisInfoMixin<IVUsersAnalysis> {
  friend AnalysisInfoMixin<IVUsersAnalysis>;
  static AnalysisKey Key;

public:
  typedef IVUsers Result;

IVUsers run(Loop &L, LoopAnalysisManager &AM,
              LoopStandardAnalysisResults &AR);
};

}

#endif

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