class GlobalDCEPass

Declaration

class GlobalDCEPass : public PassInfoMixin { /* full declaration omitted */ };

Description

Pass to remove unused function declarations.

Declared at: llvm/include/llvm/Transforms/IPO/GlobalDCE.h:36

Inherits from: PassInfoMixin

Member Variables

private SmallPtrSet<llvm::GlobalValue*, 32> AliveGlobals

private DenseMap<llvm::GlobalValue*, SmallPtrSet<llvm::GlobalValue*, 4>> GVDependencies

Global -> Global that uses this global.

private std::unordered_map<Constant*, SmallPtrSet<GlobalValue*, 8>> ConstantDependenciesCache

Constant -> Globals that use this global cache.

private std::unordered_multimap<Comdat*, GlobalValue*> ComdatMembers

Comdat -> Globals in that Comdat section.

private DenseMap< llvm::Metadata*, SmallSet<std::pair<GlobalVariable*, uint64_t>, 4>> TypeIdMap

!type metadata -> set of (vtable, offset) pairs

private SmallPtrSet<llvm::GlobalValue*, 32> VFESafeVTables

Method Overview

• private void AddVirtualFunctionDependencies(llvm::Module & M)
• private void ComputeDependencies(llvm::Value * V, SmallPtrSetImpl<llvm::GlobalValue *> & U)
• private void MarkLive(llvm::GlobalValue & GV, SmallVectorImpl<llvm::GlobalValue *> * Updates = nullptr)
• private bool RemoveUnusedGlobalValue(llvm::GlobalValue & GV)
• private void ScanTypeCheckedLoadIntrinsics(llvm::Module & M)
• private void ScanVTableLoad(llvm::Function * Caller, llvm::Metadata * TypeId, uint64_t CallOffset)
• private void ScanVTables(llvm::Module & M)
• private void UpdateGVDependencies(llvm::GlobalValue & GV)
• public llvm::PreservedAnalyses run(llvm::Module & M, llvm::ModuleAnalysisManager &)

Methods

¶void AddVirtualFunctionDependencies(
    llvm::Module& M)

Declared at: llvm/include/llvm/Transforms/IPO/GlobalDCE.h:67

Parameters

llvm::Module& M

¶void ComputeDependencies(
    llvm::Value* V,
    SmallPtrSetImpl<llvm::GlobalValue*>& U)

Declared at: llvm/include/llvm/Transforms/IPO/GlobalDCE.h:72

Parameters

llvm::Value* V

SmallPtrSetImpl<llvm::GlobalValue*>& U

¶void MarkLive(llvm::GlobalValue& GV,
              SmallVectorImpl<llvm::GlobalValue*>*
                  Updates = nullptr)

Declared at: llvm/include/llvm/Transforms/IPO/GlobalDCE.h:62

Parameters

llvm::GlobalValue& GV

SmallVectorImpl<llvm::GlobalValue*>* Updates = nullptr

¶bool RemoveUnusedGlobalValue(
    llvm::GlobalValue& GV)

Declared at: llvm/include/llvm/Transforms/IPO/GlobalDCE.h:64

Parameters

llvm::GlobalValue& GV

¶void ScanTypeCheckedLoadIntrinsics(
    llvm::Module& M)

Declared at: llvm/include/llvm/Transforms/IPO/GlobalDCE.h:69

Parameters

llvm::Module& M

¶void ScanVTableLoad(llvm::Function* Caller,
                    llvm::Metadata* TypeId,
                    uint64_t CallOffset)

Declared at: llvm/include/llvm/Transforms/IPO/GlobalDCE.h:70

Parameters

llvm::Function* Caller

llvm::Metadata* TypeId

uint64_t CallOffset

¶void ScanVTables(llvm::Module& M)

Declared at: llvm/include/llvm/Transforms/IPO/GlobalDCE.h:68

Parameters

llvm::Module& M

¶void UpdateGVDependencies(llvm::GlobalValue& GV)

Declared at: llvm/include/llvm/Transforms/IPO/GlobalDCE.h:61

Parameters

llvm::GlobalValue& GV

¶llvm::PreservedAnalyses run(
    llvm::Module& M,
    llvm::ModuleAnalysisManager&)

Declared at: llvm/include/llvm/Transforms/IPO/GlobalDCE.h:38

Parameters

llvm::Module& M

llvm::ModuleAnalysisManager&