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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: AssumeBundleQueries.h

//===- AssumeBundleQueries.h - utilities to query assume bundles *- 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 contain tools to query into assume bundles. assume bundles can be
// built using utilities from Transform/Utils/AssumeBundleBuilder.h
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_TRANSFORMS_UTILS_ASSUMEBUNDLEQUERIES_H
#define LLVM_TRANSFORMS_UTILS_ASSUMEBUNDLEQUERIES_H

#include "llvm/IR/Attributes.h"
#include "llvm/IR/Instructions.h"
#include "llvm/ADT/DenseMap.h"

namespace llvm {
class IntrinsicInst;
class AssumptionCache;
class DominatorTree;

/// Index of elements in the operand bundle.
/// If the element exist it is guaranteed to be what is specified in this enum
/// but it may not exist.
enum AssumeBundleArg {
  ABA_WasOn = 0,
  ABA_Argument = 1,
};

/// Query the operand bundle of an llvm.assume to find a single attribute of
/// the specified kind applied on a specified Value.
///
/// This has a non-constant complexity. It should only be used when a single
/// attribute is going to be queried.
///
/// Return true iff the queried attribute was found.
/// If ArgVal is set. the argument will be stored to ArgVal.
bool hasAttributeInAssume(CallInst &AssumeCI, Value *IsOn, StringRef AttrName,
                          uint64_t *ArgVal = nullptr);
inline bool hasAttributeInAssume(CallInst &AssumeCI, Value *IsOn,
                                 Attribute::AttrKind Kind,
                                 uint64_t *ArgVal = nullptr) {
  return hasAttributeInAssume(AssumeCI, IsOn,
                              Attribute::getNameFromAttrKind(Kind), ArgVal);
}

template<> struct DenseMapInfo<Attribute::AttrKind> {
  static Attribute::AttrKind getEmptyKey() {
    return Attribute::EmptyKey;
  }
  static Attribute::AttrKind getTombstoneKey() {
    return Attribute::TombstoneKey;
  }
  static unsigned getHashValue(Attribute::AttrKind AK) {
    return hash_combine(AK);
  }
  static bool isEqual(Attribute::AttrKind LHS, Attribute::AttrKind RHS) {
    return LHS == RHS;
  }
};

/// The map Key contains the Value on for which the attribute is valid and
/// the Attribute that is valid for that value.
/// If the Attribute is not on any value, the Value is nullptr.
using RetainedKnowledgeKey = std::pair<Value *, Attribute::AttrKind>;

struct MinMax {
  unsigned Min;
  unsigned Max;
};

/// A mapping from intrinsics (=`llvm.assume` calls) to a value range
/// (=knowledge) that is encoded in them. How the value range is interpreted
/// depends on the RetainedKnowledgeKey that was used to get this out of the
/// RetainedKnowledgeMap.
using Assume2KnowledgeMap = DenseMap<IntrinsicInst *, MinMax>;

using RetainedKnowledgeMap =
    DenseMap<RetainedKnowledgeKey, Assume2KnowledgeMap>;

/// Insert into the map all the informations contained in the operand bundles of
/// the llvm.assume. This should be used instead of hasAttributeInAssume when
/// many queries are going to be made on the same llvm.assume.
/// String attributes are not inserted in the map.
/// If the IR changes the map will be outdated.
void fillMapFromAssume(CallInst &AssumeCI, RetainedKnowledgeMap &Result);

/// Represent one information held inside an operand bundle of an llvm.assume.
/// AttrKind is the property that holds.
/// WasOn if not null is that Value for which AttrKind holds.
/// ArgValue is optionally an argument of the attribute.
/// For example if we know that %P has an alignment of at least four:
///  - AttrKind will be Attribute::Alignment.
///  - WasOn will be %P.
///  - ArgValue will be 4.
struct RetainedKnowledge {
  Attribute::AttrKind AttrKind = Attribute::None;
  unsigned ArgValue = 0;
  Value *WasOn = nullptr;
  bool operator==(RetainedKnowledge Other) const {
    return AttrKind == Other.AttrKind && WasOn == Other.WasOn &&
           ArgValue == Other.ArgValue;
  }
  bool operator!=(RetainedKnowledge Other) const { return !(*this == Other); }
  operator bool() const { return AttrKind != Attribute::None; }
  static RetainedKnowledge none() { return RetainedKnowledge{}; }
};

/// Retreive the information help by Assume on the operand at index Idx.
/// Assume should be an llvm.assume and Idx should be in the operand bundle.
RetainedKnowledge getKnowledgeFromOperandInAssume(CallInst &Assume,
                                                  unsigned Idx);

/// Retreive the information help by the Use U of an llvm.assume. the use should
/// be in the operand bundle.
inline RetainedKnowledge getKnowledgeFromUseInAssume(const Use *U) {
  return getKnowledgeFromOperandInAssume(*cast<CallInst>(U->getUser()),
                                         U->getOperandNo());
}

/// Tag in operand bundle indicating that this bundle should be ignored.
constexpr StringRef IgnoreBundleTag = "ignore";

/// Return true iff the operand bundles of the provided llvm.assume doesn't
/// contain any valuable information. This is true when:
///  - The operand bundle is empty
///  - The operand bundle only contains information about dropped values or
///    constant folded values.
///
/// the argument to the call of llvm.assume may still be useful even if the
/// function returned true.
bool isAssumeWithEmptyBundle(CallInst &Assume);

/// Return a valid Knowledge associated to the Use U if its Attribute kind is
/// in AttrKinds.
RetainedKnowledge getKnowledgeFromUse(const Use *U,
                                      ArrayRef<Attribute::AttrKind> AttrKinds);

/// Return a valid Knowledge associated to the Value V if its Attribute kind is
/// in AttrKinds and it matches the Filter.
RetainedKnowledge getKnowledgeForValue(
    const Value *V, ArrayRef<Attribute::AttrKind> AttrKinds,
    AssumptionCache *AC = nullptr,
    function_ref<bool(RetainedKnowledge, Instruction *,
                            const CallBase::BundleOpInfo *)>
        Filter = [](auto...) { return true; });

/// Return a valid Knowledge associated to the Value V if its Attribute kind is
/// in AttrKinds and the knowledge is suitable to be used in the context of
/// CtxI.
RetainedKnowledge getKnowledgeValidInContext(
    const Value *V, ArrayRef<Attribute::AttrKind> AttrKinds,
    const Instruction *CtxI, const DominatorTree *DT = nullptr,
    AssumptionCache *AC = nullptr);

/// This extracts the Knowledge from an element of an operand bundle.
/// This is mostly for use in the assume builder.
RetainedKnowledge getKnowledgeFromBundle(CallInst &Assume,
                                         const CallBase::BundleOpInfo &BOI);

} // namespace llvm

#endif

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Editing: AssumeBundleQueries.h

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