LLVM: llvm::InlineCost Class Reference

LLVM 15.0.0git

Represents the cost of inlining a function. More...

#include "llvm/Analysis/InlineCost.h"

Public Member Functions
	operator bool () const
	Test whether the inline cost is low enough for inlining. More...

bool	isAlways () const

bool	isNever () const

bool	isVariable () const

int	getCost () const
	Get the inline cost estimate. More...

int	getThreshold () const
	Get the threshold against which the cost was computed. More...

Optional< CostBenefitPair >	getCostBenefit () const
	Get the cost-benefit pair which was computed by cost-benefit analysis. More...

const char *	getReason () const
	Get the reason of Always or Never. More...

int	getCostDelta () const
	Get the cost delta from the threshold for inlining. More...

Static Public Member Functions
static InlineCost	get (int Cost, int Threshold)

static InlineCost	getAlways (const char *Reason, Optional< CostBenefitPair > CostBenefit=None)

static InlineCost	getNever (const char *Reason, Optional< CostBenefitPair > CostBenefit=None)

Detailed Description

Represents the cost of inlining a function.

This supports special values for functions which should "always" or "never" be inlined. Otherwise, the cost represents a unitless amount; smaller values increase the likelihood of the function being inlined.

Objects of this type also provide the adjusted threshold for inlining based on the information available for a particular callsite. They can be directly tested to determine if inlining should occur given the cost and threshold for this cost metric.

Definition at line 87 of file InlineCost.h.

Member Function Documentation

◆ get()

static InlineCost llvm::InlineCost::get	(	int	Cost,
		int	Threshold
	)

inlinestatic

Definition at line 112 of file InlineCost.h.

References assert().

Referenced by llvm::getInlineCost().

◆ getAlways()

static InlineCost llvm::InlineCost::getAlways	(	const char *	Reason,
		Optional< CostBenefitPair >	CostBenefit = `None`
	)

inlinestatic

Definition at line 117 of file InlineCost.h.

Referenced by llvm::ReplayInlineAdvisor::getAdviceImpl(), llvm::getInlineCost(), and llvm::AlwaysInlinerPass::run().

◆ getCost()

int llvm::InlineCost::getCost ( ) const

inline

Get the inline cost estimate.

It is an error to call this on an "always" or "never" InlineCost.

Definition at line 135 of file InlineCost.h.

References assert(), and isVariable().

Referenced by getCostDelta(), llvm::operator<<(), shouldBeDeferred(), and llvm::shouldInline().

◆ getCostBenefit()

Optional<CostBenefitPair> llvm::InlineCost::getCostBenefit ( ) const

inline

Get the cost-benefit pair which was computed by cost-benefit analysis.

Definition at line 147 of file InlineCost.h.

◆ getCostDelta()

int llvm::InlineCost::getCostDelta ( ) const

inline

Get the cost delta from the threshold for inlining.

Only valid if the cost is of the variable kind. Returns a negative value if the cost is too high to inline.

Definition at line 159 of file InlineCost.h.

References getCost().

Referenced by shouldBeDeferred().

◆ getNever()

static InlineCost llvm::InlineCost::getNever	(	const char *	Reason,
		Optional< CostBenefitPair >	CostBenefit = `None`
	)

inlinestatic

Definition at line 121 of file InlineCost.h.

Referenced by llvm::getInlineCost().

◆ getReason()

const char* llvm::InlineCost::getReason ( ) const

inline

Get the reason of Always or Never.

Definition at line 150 of file InlineCost.h.

References assert(), and isVariable().

Referenced by llvm::operator<<().

◆ getThreshold()

int llvm::InlineCost::getThreshold ( ) const

inline

Get the threshold against which the cost was computed.

Definition at line 141 of file InlineCost.h.

References assert(), and isVariable().

Referenced by llvm::operator<<().

◆ isAlways()

bool llvm::InlineCost::isAlways ( ) const

inline

Definition at line 129 of file InlineCost.h.

Referenced by llvm::emitInlinedIntoBasedOnCost(), isVariable(), llvm::operator<<(), shouldBeDeferred(), and llvm::shouldInline().

◆ isNever()

bool llvm::InlineCost::isNever ( ) const

inline

Definition at line 130 of file InlineCost.h.

Referenced by isVariable(), llvm::operator<<(), and llvm::shouldInline().

◆ isVariable()

bool llvm::InlineCost::isVariable ( ) const

inline

Definition at line 131 of file InlineCost.h.

References isAlways(), and isNever().

Referenced by getCost(), getReason(), and getThreshold().

◆ operator bool()

llvm::InlineCost::operator bool ( ) const

inlineexplicit

Test whether the inline cost is low enough for inlining.

Definition at line 127 of file InlineCost.h.

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

include/llvm/Analysis/InlineCost.h