struct MemoryDepChecker::Dependence

Declaration

struct MemoryDepChecker::Dependence { /* full declaration omitted */ };

Description

Dependece between memory access instructions.

Declared at: llvm/include/llvm/Analysis/LoopAccessAnalysis.h:107

Member Variables

public unsigned int Source

Index of the source of the dependence in the InstMap vector.

public unsigned int Destination

Index of the destination of the dependence in the InstMap vector.

public llvm::MemoryDepChecker::Dependence::DepType Type

The type of the dependence.

public static const char*[] DepName

String version of the types.

Method Overview

• public Dependence(unsigned int Source, unsigned int Destination, llvm::MemoryDepChecker::Dependence::DepType Type)
• public llvm::Instruction * getDestination(const llvm::LoopAccessInfo & LAI) const
• public llvm::Instruction * getSource(const llvm::LoopAccessInfo & LAI) const
• public bool isBackward() const
• public bool isForward() const
• public bool isPossiblyBackward() const
• public static llvm::MemoryDepChecker::VectorizationSafetyStatus isSafeForVectorization(llvm::MemoryDepChecker::Dependence::DepType Type)
• public void print(llvm::raw_ostream & OS, unsigned int Depth, const SmallVectorImpl<llvm::Instruction *> & Instrs) const

Methods

¶Dependence(
    unsigned int Source,
    unsigned int Destination,
    llvm::MemoryDepChecker::Dependence::DepType
        Type)

Declared at: llvm/include/llvm/Analysis/LoopAccessAnalysis.h:146

Parameters

unsigned int Source

unsigned int Destination

llvm::MemoryDepChecker::Dependence::DepType Type

¶llvm::Instruction* getDestination(
    const llvm::LoopAccessInfo& LAI) const

Description

Return the destination instruction of the dependence.

Declared at: llvm/include/llvm/Analysis/LoopAccessAnalysis.h:152

Parameters

const llvm::LoopAccessInfo& LAI

¶llvm::Instruction* getSource(
    const llvm::LoopAccessInfo& LAI) const

Description

Return the source instruction of the dependence.

Declared at: llvm/include/llvm/Analysis/LoopAccessAnalysis.h:150

Parameters

const llvm::LoopAccessInfo& LAI

¶bool isBackward() const

Description

Lexically backward dependence.

Declared at: llvm/include/llvm/Analysis/LoopAccessAnalysis.h:160

¶bool isForward() const

Description

Lexically forward dependence.

Declared at: llvm/include/llvm/Analysis/LoopAccessAnalysis.h:158

¶bool isPossiblyBackward() const

Description

May be a lexically backward dependence type (includes Unknown).

Declared at: llvm/include/llvm/Analysis/LoopAccessAnalysis.h:163

¶static llvm::MemoryDepChecker::
    VectorizationSafetyStatus
    isSafeForVectorization(
        llvm::MemoryDepChecker::Dependence::
            DepType Type)

Description

Dependence types that don't prevent vectorization.

Declared at: llvm/include/llvm/Analysis/LoopAccessAnalysis.h:155

Parameters

llvm::MemoryDepChecker::Dependence::DepType Type

¶void print(
    llvm::raw_ostream& OS,
    unsigned int Depth,
    const SmallVectorImpl<llvm::Instruction*>&
        Instrs) const

Description

Print the dependence. \p Instr is used to map the instruction indices to instructions.

Declared at: llvm/include/llvm/Analysis/LoopAccessAnalysis.h:167

Parameters

llvm::raw_ostream& OS

unsigned int Depth

const SmallVectorImpl<llvm::Instruction*>& Instrs