Prefetch Struct Reference

A record for a potential prefetch made during the initial scan of the loop. More...

Public Member Functions
	Prefetch (const SCEVAddRecExpr *L, Instruction *I)
	Constructor to create a new Prefetch for I.
void	addInstruction (Instruction *I, DominatorTree *DT=nullptr, int64_t PtrDiff=0)
	Add the instruction.

Public Attributes
const SCEVAddRecExpr *	LSCEVAddRec
	The address formula for this prefetch as returned by ScalarEvolution.
Instruction *	InsertPt = nullptr
	The point of insertion for the prefetch instruction.
bool	Writes = false
	True if targeting a write memory access.
Instruction *	MemI = nullptr
	The (first seen) prefetched instruction.

Detailed Description

A record for a potential prefetch made during the initial scan of the loop.

This is used to let a single prefetch target multiple memory accesses.

Definition at line 233 of file LoopDataPrefetch.cpp.

Constructor & Destructor Documentation

Prefetch()

Prefetch::Prefetch ( const SCEVAddRecExpr * L, Instruction * I )

inline

Constructor to create a new Prefetch for I.

Definition at line 244 of file LoopDataPrefetch.cpp.

References addInstruction(), I, and LSCEVAddRec.

Member Function Documentation

addInstruction()

void Prefetch::addInstruction ( Instruction * I, DominatorTree * DT = nullptr, int64_t PtrDiff = 0 )

inline

Add the instruction.

Parameters

I	to this prefetch. If it's not the first one, 'InsertPt' and 'Writes' will be updated as required.
PtrDiff	the known constant address difference to the first added instruction.

Definition at line 252 of file LoopDataPrefetch.cpp.

References llvm::DominatorTree::findNearestCommonDominator(), llvm::BasicBlock::getTerminator(), I, InsertPt, llvm::isa(), MemI, and Writes.

Referenced by Prefetch().

Member Data Documentation

InsertPt

Instruction* Prefetch::InsertPt = nullptr

The point of insertion for the prefetch instruction.

Definition at line 237 of file LoopDataPrefetch.cpp.

Referenced by addInstruction().

LSCEVAddRec

const SCEVAddRecExpr* Prefetch::LSCEVAddRec

The address formula for this prefetch as returned by ScalarEvolution.

Definition at line 235 of file LoopDataPrefetch.cpp.

Referenced by Prefetch().

MemI

Instruction* Prefetch::MemI = nullptr

The (first seen) prefetched instruction.

Definition at line 241 of file LoopDataPrefetch.cpp.

Referenced by addInstruction().

Writes

bool Prefetch::Writes = false

True if targeting a write memory access.

Definition at line 239 of file LoopDataPrefetch.cpp.

Referenced by addInstruction().

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The documentation for this struct was generated from the following file:

• lib/Transforms/Scalar/LoopDataPrefetch.cpp