llvm::VPRegisterUsage Struct Reference

A struct that represents some properties of the register usage of a loop. More...

#include "Transforms/Vectorize/VPlanAnalysis.h"

Public Member Functions
InstructionCost	spillCost (const TargetTransformInfo &TTI, TargetTransformInfo::TargetCostKind CostKind, unsigned OverrideMaxNumRegs=0) const
	Calculate the estimated cost of any spills due to using more registers than the number available for the target.

Public Attributes
SmallMapVector< unsigned, unsigned, 4 >	LoopInvariantRegs
	Holds the number of loop invariant values that are used in the loop.
SmallMapVector< unsigned, unsigned, 4 >	MaxLocalUsers
	Holds the maximum number of concurrent live intervals in the loop.

Detailed Description

A struct that represents some properties of the register usage of a loop.

Definition at line 80 of file VPlanAnalysis.h.

Member Function Documentation

spillCost()

InstructionCost VPRegisterUsage::spillCost	(	const TargetTransformInfo &	TTI,
		TargetTransformInfo::TargetCostKind	CostKind,
		unsigned	OverrideMaxNumRegs = 0 ) const

Calculate the estimated cost of any spills due to using more registers than the number available for the target.

If non-zero, OverrideMaxNumRegs is used in place of the target's number of registers.

Definition at line 396 of file VPlanAnalysis.cpp.

References CostKind, llvm::dbgs(), LLVM_DEBUG, and MaxLocalUsers.

Referenced by llvm::VPlanTransforms::replaceWideCanonicalIVWithWideIV().

Member Data Documentation

LoopInvariantRegs

SmallMapVector<unsigned, unsigned, 4> llvm::VPRegisterUsage::LoopInvariantRegs

Holds the number of loop invariant values that are used in the loop.

The key is ClassID of target-provided register class.

Definition at line 83 of file VPlanAnalysis.h.

Referenced by llvm::calculateRegisterUsageForPlan().

MaxLocalUsers

SmallMapVector<unsigned, unsigned, 4> llvm::VPRegisterUsage::MaxLocalUsers

Holds the maximum number of concurrent live intervals in the loop.

The key is ClassID of target-provided register class.

Definition at line 86 of file VPlanAnalysis.h.

Referenced by llvm::calculateRegisterUsageForPlan(), llvm::VPlanTransforms::replaceWideCanonicalIVWithWideIV(), and spillCost().

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

• lib/Transforms/Vectorize/VPlanAnalysis.h
• lib/Transforms/Vectorize/VPlanAnalysis.cpp