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📄 AlwaysInliner.h(1.6 KB)
📄 ArgumentPromotion.h(1.75 KB)
📄 Attributor.h(125.79 KB)
📄 CalledValuePropagation.h(1.36 KB)
📄 ConstantMerge.h(1.31 KB)
📄 CrossDSOCFI.h(959 B)
📄 DeadArgumentElimination.h(5.04 KB)
📄 ElimAvailExtern.h(1.05 KB)
📄 ForceFunctionAttrs.h(1.14 KB)
📄 FunctionAttrs.h(2.93 KB)
📄 FunctionImport.h(9.74 KB)
📄 GlobalDCE.h(2.52 KB)
📄 GlobalOpt.h(1.03 KB)
📄 GlobalSplit.h(1.14 KB)
📄 HotColdSplitting.h(2.53 KB)
📄 InferFunctionAttrs.h(1.18 KB)
📄 Inliner.h(5.91 KB)
📄 Internalize.h(3.18 KB)
📄 LowerTypeTests.h(7.68 KB)
📄 MergeFunctions.h(1.03 KB)
📄 OpenMPOpt.h(2.07 KB)
📄 PartialInlining.h(1004 B)
📄 PassManagerBuilder.h(10.26 KB)
📄 SCCP.h(1.18 KB)
📄 SampleProfile.h(1.31 KB)
📄 StripDeadPrototypes.h(1.12 KB)
📄 SyntheticCountsPropagation.h(747 B)
📄 ThinLTOBitcodeWriter.h(1.34 KB)
📄 WholeProgramDevirt.h(9.77 KB)

Editing: GlobalDCE.h

//===-- GlobalDCE.h - DCE unreachable internal functions ------------------===//
//
// 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 transform is designed to eliminate unreachable internal globals from the
// program.  It uses an aggressive algorithm, searching out globals that are
// known to be alive.  After it finds all of the globals which are needed, it
// deletes whatever is left over.  This allows it to delete recursive chunks of
// the program which are unreachable.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_TRANSFORMS_IPO_GLOBALDCE_H
#define LLVM_TRANSFORMS_IPO_GLOBALDCE_H

#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/PassManager.h"
#include <unordered_map>

namespace llvm {

/// Pass to remove unused function declarations.
class GlobalDCEPass : public PassInfoMixin<GlobalDCEPass> {
public:
  PreservedAnalyses run(Module &M, ModuleAnalysisManager &);

private:
  SmallPtrSet<GlobalValue*, 32> AliveGlobals;

/// Global -> Global that uses this global.
  DenseMap<GlobalValue *, SmallPtrSet<GlobalValue *, 4>> GVDependencies;

/// Constant -> Globals that use this global cache.
  std::unordered_map<Constant *, SmallPtrSet<GlobalValue *, 8>>
      ConstantDependenciesCache;

/// Comdat -> Globals in that Comdat section.
  std::unordered_multimap<Comdat *, GlobalValue *> ComdatMembers;

/// !type metadata -> set of (vtable, offset) pairs
  DenseMap<Metadata *, SmallSet<std::pair<GlobalVariable *, uint64_t>, 4>>
      TypeIdMap;

// Global variables which are vtables, and which we have enough information
  // about to safely do dead virtual function elimination.
  SmallPtrSet<GlobalValue *, 32> VFESafeVTables;

void UpdateGVDependencies(GlobalValue &GV);
  void MarkLive(GlobalValue &GV,
                SmallVectorImpl<GlobalValue *> *Updates = nullptr);
  bool RemoveUnusedGlobalValue(GlobalValue &GV);

// Dead virtual function elimination.
  void AddVirtualFunctionDependencies(Module &M);
  void ScanVTables(Module &M);
  void ScanTypeCheckedLoadIntrinsics(Module &M);
  void ScanVTableLoad(Function *Caller, Metadata *TypeId, uint64_t CallOffset);

void ComputeDependencies(Value *V, SmallPtrSetImpl<GlobalValue *> &U);
};

}

#endif // LLVM_TRANSFORMS_IPO_GLOBALDCE_H

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Editing: GlobalDCE.h

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