class LoopVectorizeHints

Declaration

class LoopVectorizeHints { /* full declaration omitted */ };

Description

Utility class for getting and setting loop vectorizer hints in the form of loop metadata. This class keeps a number of loop annotations locally (as member variables) and can, upon request, write them back as metadata on the loop. It will initially scan the loop for existing metadata, and will update the local values based on information in the loop. We cannot write all values to metadata, as the mere presence of some info, for example 'force', means a decision has been made. So, we need to be careful NOT to add them if the user hasn't specifically asked so.

Declared at: llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h:45

Method Overview

• public LoopVectorizeHints(const llvm::Loop * L, bool InterleaveOnlyWhenForced, llvm::OptimizationRemarkEmitter & ORE)
• public bool allowReordering() const
• public bool allowVectorization(llvm::Function * F, llvm::Loop * L, bool VectorizeOnlyWhenForced) const
• public void emitRemarkWithHints() const
• public enum ForceKind getForce() const
• public unsigned int getInterleave() const
• public unsigned int getIsVectorized() const
• public unsigned int getPredicate() const
• public unsigned int getWidth() const
• public bool isPotentiallyUnsafe() const
• public void setAlreadyVectorized()
• public void setPotentiallyUnsafe()
• public const char * vectorizeAnalysisPassName() const

Methods

¶LoopVectorizeHints(
    const llvm::Loop* L,
    bool InterleaveOnlyWhenForced,
    llvm::OptimizationRemarkEmitter& ORE)

Declared at: llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h:89

Parameters

const llvm::Loop* L

bool InterleaveOnlyWhenForced

llvm::OptimizationRemarkEmitter& ORE

¶bool allowReordering() const

Declared at: llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h:116

¶bool allowVectorization(
    llvm::Function* F,
    llvm::Loop* L,
    bool VectorizeOnlyWhenForced) const

Declared at: llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h:95

Parameters

llvm::Function* F

llvm::Loop* L

bool VectorizeOnlyWhenForced

¶void emitRemarkWithHints() const

Description

Dumps all the hint information.

Declared at: llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h:99

¶enum ForceKind getForce() const

Declared at: llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h:105

¶unsigned int getInterleave() const

Declared at: llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h:102

¶unsigned int getIsVectorized() const

Declared at: llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h:103

¶unsigned int getPredicate() const

Declared at: llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h:104

¶unsigned int getWidth() const

Declared at: llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h:101

¶bool isPotentiallyUnsafe() const

Declared at: llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h:125

¶void setAlreadyVectorized()

Description

Mark the loop L as already vectorized by setting the width to 1.

Declared at: llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h:93

¶void setPotentiallyUnsafe()

Declared at: llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h:134

¶const char* vectorizeAnalysisPassName() const

Description

If hints are provided that force vectorization, use the AlwaysPrint pass name to force the frontend to print the diagnostic.

Declared at: llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h:114