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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: CaptureTracking.h

//===----- llvm/Analysis/CaptureTracking.h - Pointer capture ----*- 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 contains routines that help determine which pointers are captured.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_ANALYSIS_CAPTURETRACKING_H
#define LLVM_ANALYSIS_CAPTURETRACKING_H

namespace llvm {

class Value;
  class Use;
  class DataLayout;
  class Instruction;
  class DominatorTree;

/// getDefaultMaxUsesToExploreForCaptureTracking - Return default value of
  /// the maximal number of uses to explore before giving up. It is used by
  /// PointerMayBeCaptured family analysis.
  unsigned getDefaultMaxUsesToExploreForCaptureTracking();

/// PointerMayBeCaptured - Return true if this pointer value may be captured
  /// by the enclosing function (which is required to exist).  This routine can
  /// be expensive, so consider caching the results.  The boolean ReturnCaptures
  /// specifies whether returning the value (or part of it) from the function
  /// counts as capturing it or not.  The boolean StoreCaptures specified
  /// whether storing the value (or part of it) into memory anywhere
  /// automatically counts as capturing it or not.
  /// MaxUsesToExplore specifies how many uses the analysis should explore for
  /// one value before giving up due too "too many uses". If MaxUsesToExplore
  /// is zero, a default value is assumed.
  bool PointerMayBeCaptured(const Value *V, bool ReturnCaptures,
                            bool StoreCaptures,
                            unsigned MaxUsesToExplore = 0);

/// PointerMayBeCapturedBefore - Return true if this pointer value may be
  /// captured by the enclosing function (which is required to exist). If a
  /// DominatorTree is provided, only captures which happen before the given
  /// instruction are considered. This routine can be expensive, so consider
  /// caching the results.  The boolean ReturnCaptures specifies whether
  /// returning the value (or part of it) from the function counts as capturing
  /// it or not.  The boolean StoreCaptures specified whether storing the value
  /// (or part of it) into memory anywhere automatically counts as capturing it
  /// or not. Captures by the provided instruction are considered if the
  /// final parameter is true.
  /// MaxUsesToExplore specifies how many uses the analysis should explore for
  /// one value before giving up due too "too many uses". If MaxUsesToExplore
  /// is zero, a default value is assumed.
  bool PointerMayBeCapturedBefore(
      const Value *V, bool ReturnCaptures, bool StoreCaptures,
      const Instruction *I, const DominatorTree *DT, bool IncludeI = false,
      unsigned MaxUsesToExplore = 0);

/// This callback is used in conjunction with PointerMayBeCaptured. In
  /// addition to the interface here, you'll need to provide your own getters
  /// to see whether anything was captured.
  struct CaptureTracker {
    virtual ~CaptureTracker();

/// tooManyUses - The depth of traversal has breached a limit. There may be
    /// capturing instructions that will not be passed into captured().
    virtual void tooManyUses() = 0;

/// shouldExplore - This is the use of a value derived from the pointer.
    /// To prune the search (ie., assume that none of its users could possibly
    /// capture) return false. To search it, return true.
    ///
    /// U->getUser() is always an Instruction.
    virtual bool shouldExplore(const Use *U);

/// captured - Information about the pointer was captured by the user of
    /// use U. Return true to stop the traversal or false to continue looking
    /// for more capturing instructions.
    virtual bool captured(const Use *U) = 0;

/// isDereferenceableOrNull - Overload to allow clients with additional
    /// knowledge about pointer dereferenceability to provide it and thereby
    /// avoid conservative responses when a pointer is compared to null.
    virtual bool isDereferenceableOrNull(Value *O, const DataLayout &DL);
  };

/// PointerMayBeCaptured - Visit the value and the values derived from it and
  /// find values which appear to be capturing the pointer value. This feeds
  /// results into and is controlled by the CaptureTracker object.
  /// MaxUsesToExplore specifies how many uses the analysis should explore for
  /// one value before giving up due too "too many uses". If MaxUsesToExplore
  /// is zero, a default value is assumed.
  void PointerMayBeCaptured(const Value *V, CaptureTracker *Tracker,
                            unsigned MaxUsesToExplore = 0);
} // end namespace llvm

#endif

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Editing: CaptureTracking.h

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