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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: LazyValueInfo.h

//===- LazyValueInfo.h - Value constraint analysis --------------*- 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 defines the interface for lazy computation of value constraint
// information.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_ANALYSIS_LAZYVALUEINFO_H
#define LLVM_ANALYSIS_LAZYVALUEINFO_H

#include "llvm/IR/PassManager.h"
#include "llvm/Pass.h"

namespace llvm {
  class AssumptionCache;
  class Constant;
  class ConstantRange;
  class DataLayout;
  class DominatorTree;
  class Instruction;
  class TargetLibraryInfo;
  class Value;

/// This pass computes, caches, and vends lazy value constraint information.
class LazyValueInfo {
  friend class LazyValueInfoWrapperPass;
  AssumptionCache *AC = nullptr;
  const DataLayout *DL = nullptr;
  class TargetLibraryInfo *TLI = nullptr;
  void *PImpl = nullptr;
  LazyValueInfo(const LazyValueInfo&) = delete;
  void operator=(const LazyValueInfo&) = delete;
public:
  ~LazyValueInfo();
  LazyValueInfo() {}
  LazyValueInfo(AssumptionCache *AC_, const DataLayout *DL_,
                TargetLibraryInfo *TLI_)
      : AC(AC_), DL(DL_), TLI(TLI_) {}
  LazyValueInfo(LazyValueInfo &&Arg)
      : AC(Arg.AC), DL(Arg.DL), TLI(Arg.TLI), PImpl(Arg.PImpl) {
    Arg.PImpl = nullptr;
  }
  LazyValueInfo &operator=(LazyValueInfo &&Arg) {
    releaseMemory();
    AC = Arg.AC;
    DL = Arg.DL;
    TLI = Arg.TLI;
    PImpl = Arg.PImpl;
    Arg.PImpl = nullptr;
    return *this;
  }

/// This is used to return true/false/dunno results.
  enum Tristate {
    Unknown = -1, False = 0, True = 1
  };

// Public query interface.

/// Determine whether the specified value comparison with a constant is known
  /// to be true or false on the specified CFG edge.
  /// Pred is a CmpInst predicate.
  Tristate getPredicateOnEdge(unsigned Pred, Value *V, Constant *C,
                              BasicBlock *FromBB, BasicBlock *ToBB,
                              Instruction *CxtI = nullptr);

/// Determine whether the specified value comparison with a constant is known
  /// to be true or false at the specified instruction
  /// (from an assume intrinsic). Pred is a CmpInst predicate.
  Tristate getPredicateAt(unsigned Pred, Value *V, Constant *C,
                          Instruction *CxtI);

/// Determine whether the specified value is known to be a
  /// constant at the end of the specified block.  Return null if not.
  Constant *getConstant(Value *V, BasicBlock *BB, Instruction *CxtI = nullptr);

/// Return the ConstantRange constraint that is known to hold for the
  /// specified value at the end of the specified block. This may only be called
  /// on integer-typed Values.
  ConstantRange getConstantRange(Value *V, BasicBlock *BB,
                                 Instruction *CxtI = nullptr,
                                 bool UndefAllowed = true);

/// Determine whether the specified value is known to be a
  /// constant on the specified edge.  Return null if not.
  Constant *getConstantOnEdge(Value *V, BasicBlock *FromBB, BasicBlock *ToBB,
                              Instruction *CxtI = nullptr);

/// Return the ConstantRage constraint that is known to hold for the
  /// specified value on the specified edge. This may be only be called
  /// on integer-typed Values.
  ConstantRange getConstantRangeOnEdge(Value *V, BasicBlock *FromBB,
                                       BasicBlock *ToBB,
                                       Instruction *CxtI = nullptr);

/// Inform the analysis cache that we have threaded an edge from
  /// PredBB to OldSucc to be from PredBB to NewSucc instead.
  void threadEdge(BasicBlock *PredBB, BasicBlock *OldSucc, BasicBlock *NewSucc);

/// Inform the analysis cache that we have erased a block.
  void eraseBlock(BasicBlock *BB);

/// Print the \LazyValueInfo Analysis.
  /// We pass in the DTree that is required for identifying which basic blocks
  /// we can solve/print for, in the LVIPrinter.
  void printLVI(Function &F, DominatorTree &DTree, raw_ostream &OS);

// For old PM pass. Delete once LazyValueInfoWrapperPass is gone.
  void releaseMemory();

/// Handle invalidation events in the new pass manager.
  bool invalidate(Function &F, const PreservedAnalyses &PA,
                  FunctionAnalysisManager::Invalidator &Inv);
};

/// Analysis to compute lazy value information.
class LazyValueAnalysis : public AnalysisInfoMixin<LazyValueAnalysis> {
public:
  typedef LazyValueInfo Result;
  Result run(Function &F, FunctionAnalysisManager &FAM);

private:
  static AnalysisKey Key;
  friend struct AnalysisInfoMixin<LazyValueAnalysis>;
};

/// Wrapper around LazyValueInfo.
class LazyValueInfoWrapperPass : public FunctionPass {
  LazyValueInfoWrapperPass(const LazyValueInfoWrapperPass&) = delete;
  void operator=(const LazyValueInfoWrapperPass&) = delete;
public:
  static char ID;
  LazyValueInfoWrapperPass();
  ~LazyValueInfoWrapperPass() override {
    assert(!Info.PImpl && "releaseMemory not called");
  }

LazyValueInfo &getLVI();

void getAnalysisUsage(AnalysisUsage &AU) const override;
  void releaseMemory() override;
  bool runOnFunction(Function &F) override;
private:
  LazyValueInfo Info;
};

}  // end namespace llvm

#endif

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