llvm::FastMathFlags Class Reference

Convenience struct for specifying and reasoning about fast-math flags. More...

#include "llvm/IR/FMF.h"

Public Types
enum	{   AllowReassoc = (1 << 0) , NoNaNs = (1 << 1) , NoInfs = (1 << 2) , NoSignedZeros = (1 << 3) ,   AllowReciprocal = (1 << 4) , AllowContract = (1 << 5) , ApproxFunc = (1 << 6) }

Public Member Functions
	FastMathFlags ()=default
bool	any () const
bool	none () const
bool	all () const
void	clear ()
void	set ()
bool	allowReassoc () const
	Flag queries.
bool	noNaNs () const
bool	noInfs () const
bool	noSignedZeros () const
bool	allowReciprocal () const
bool	allowContract () const
bool	approxFunc () const
bool	isFast () const
	'Fast' means all bits are set.
void	setAllowReassoc (bool B=true)
	Flag setters.
void	setNoNaNs (bool B=true)
void	setNoInfs (bool B=true)
void	setNoSignedZeros (bool B=true)
void	setAllowReciprocal (bool B=true)
void	setAllowContract (bool B=true)
void	setApproxFunc (bool B=true)
void	setFast (bool B=true)
void	operator&= (const FastMathFlags &OtherFlags)
void	operator|= (const FastMathFlags &OtherFlags)
bool	operator!= (const FastMathFlags &OtherFlags) const
void	print (raw_ostream &O) const
	Print fast-math flags to O.

Static Public Member Functions
static FastMathFlags	getFast ()
static FastMathFlags	intersectRewrite (FastMathFlags LHS, FastMathFlags RHS)
	Intersect rewrite-based flags.
static FastMathFlags	unionValue (FastMathFlags LHS, FastMathFlags RHS)
	Union value flags.

Friends
class	FPMathOperator

Detailed Description

Convenience struct for specifying and reasoning about fast-math flags.

Definition at line 20 of file FMF.h.

Member Enumeration Documentation

anonymous enum

anonymous enum

Enumerator
AllowReassoc
NoNaNs
NoInfs
NoSignedZeros
AllowReciprocal
AllowContract
ApproxFunc

Definition at line 39 of file FMF.h.

Constructor & Destructor Documentation

FastMathFlags()

llvm::FastMathFlags::FastMathFlags ( )

default

Referenced by intersectRewrite(), and unionValue().

Member Function Documentation

all()

bool llvm::FastMathFlags::all ( ) const

inline

Definition at line 59 of file FMF.h.

Referenced by isFast(), llvm::InstModificationIRStrategy::mutate(), and print().

allowContract()

bool llvm::FastMathFlags::allowContract ( ) const

inline

Definition at line 70 of file FMF.h.

References AllowContract.

Referenced by llvm::GCNTTIImpl::instCombineIntrinsic(), instCombineSVEVectorFuseMulAddSub(), mapToLLVMFastMathFlags(), and print().

allowReassoc()

bool llvm::FastMathFlags::allowReassoc ( ) const

inline

Flag queries.

Definition at line 65 of file FMF.h.

References AllowReassoc.

Referenced by llvm::InstCombinerImpl::foldFMulReassoc(), getISDForVPIntrinsic(), mapToLLVMFastMathFlags(), print(), simplifyFAddInst(), simplifyFDivInst(), simplifyFMAFMul(), simplifyFSubInst(), and llvm::InstCombinerImpl::visitCallInst().

allowReciprocal()

bool llvm::FastMathFlags::allowReciprocal ( ) const

inline

Definition at line 69 of file FMF.h.

References AllowReciprocal.

Referenced by mapToLLVMFastMathFlags(), and print().

any()

bool llvm::FastMathFlags::any ( ) const

inline

Definition at line 57 of file FMF.h.

approxFunc()

bool llvm::FastMathFlags::approxFunc ( ) const

inline

Definition at line 71 of file FMF.h.

References ApproxFunc.

Referenced by llvm::AMDGPULibCalls::fold(), mapToLLVMFastMathFlags(), and print().

clear()

void llvm::FastMathFlags::clear ( )

inline

Definition at line 61 of file FMF.h.

Referenced by llvm::IRBuilderBase::clearFastMathFlags(), and setFast().

getFast()

static FastMathFlags llvm::FastMathFlags::getFast ( )

inlinestatic

Definition at line 51 of file FMF.h.

References setFast().

Referenced by llvm::RecurrenceDescriptor::AddReductionVar().

intersectRewrite()

static FastMathFlags llvm::FastMathFlags::intersectRewrite ( FastMathFlags  LHS, FastMathFlags  RHS  )

inlinestatic

Intersect rewrite-based flags.

Definition at line 113 of file FMF.h.

References AllowContract, AllowReassoc, AllowReciprocal, ApproxFunc, FastMathFlags(), LHS, and RHS.

Referenced by convertFSqrtDivIntoFMul().

isFast()

bool llvm::FastMathFlags::isFast ( ) const

inline

'Fast' means all bits are set.

Definition at line 73 of file FMF.h.

References all().

noInfs()

bool llvm::FastMathFlags::noInfs ( ) const

inline

Definition at line 67 of file FMF.h.

References NoInfs.

Referenced by llvm::computeKnownFPClass(), foldFNegIntoConstant(), llvm::InstCombinerImpl::foldSelectIntoOp(), isKnownIntegral(), mapToLLVMFastMathFlags(), print(), simplifyFDivInst(), and simplifyFPOp().

noNaNs()

bool llvm::FastMathFlags::noNaNs ( ) const

inline

Definition at line 66 of file FMF.h.

References NoNaNs.

Referenced by llvm::canIgnoreSNaN(), llvm::computeKnownFPClass(), llvm::InstCombinerImpl::foldSelectIntoOp(), llvm::RISCVTTIImpl::getMinMaxReductionCost(), llvm::getRecurrenceIdentity(), isKnownIntegral(), isKnownNonNaN(), llvm::RecurrenceDescriptor::isRecurrenceInstr(), mapToLLVMFastMathFlags(), print(), simplifyFAddInst(), simplifyFCmpInst(), simplifyFDivInst(), simplifyFMAFMul(), simplifyFPOp(), simplifyFRemInst(), and simplifyFSubInst().

none()

bool llvm::FastMathFlags::none ( ) const

inline

Definition at line 58 of file FMF.h.

Referenced by llvm::AMDGPULibCalls::fold(), and llvm::InstModificationIRStrategy::mutate().

noSignedZeros()

bool llvm::FastMathFlags::noSignedZeros ( ) const

inline

Definition at line 68 of file FMF.h.

References NoSignedZeros.

Referenced by foldFNegIntoConstant(), llvm::InstCombinerImpl::foldSelectIntoOp(), llvm::getRecurrenceIdentity(), llvm::RecurrenceDescriptor::isRecurrenceInstr(), mapToLLVMFastMathFlags(), matchSelectPattern(), print(), simplifyFAddInst(), simplifyFDivInst(), simplifyFMAFMul(), and simplifyFSubInst().

operator!=()

bool llvm::FastMathFlags::operator!= ( const FastMathFlags &  OtherFlags ) const

inline

Definition at line 105 of file FMF.h.

operator&=()

void llvm::FastMathFlags::operator&= ( const FastMathFlags &  OtherFlags )

inline

Definition at line 99 of file FMF.h.

operator|=()

void llvm::FastMathFlags::operator|= ( const FastMathFlags &  OtherFlags )

inline

Definition at line 102 of file FMF.h.

print()

void llvm::FastMathFlags::print

(

raw_ostream &

O

)

const

Print fast-math flags to O.

Definition at line 271 of file Operator.cpp.

References all(), allowContract(), allowReassoc(), allowReciprocal(), approxFunc(), noInfs(), noNaNs(), and noSignedZeros().

Referenced by llvm::operator<<(), and llvm::VPRecipeWithIRFlags::printFlags().

set()

void llvm::FastMathFlags::set ( )

inline

Definition at line 62 of file FMF.h.

Referenced by setFast().

setAllowContract()

void llvm::FastMathFlags::setAllowContract ( bool  B = true )

inline

Definition at line 91 of file FMF.h.

References AllowContract, and B.

Referenced by getDecodedFastMathFlags(), llvm::VPRecipeWithIRFlags::getFastMathFlags(), and mapFromLLVMFastMathFlags().

setAllowReassoc()

void llvm::FastMathFlags::setAllowReassoc ( bool  B = true )

inline

Flag setters.

Definition at line 76 of file FMF.h.

References AllowReassoc, and B.

Referenced by getDecodedFastMathFlags(), llvm::VPRecipeWithIRFlags::getFastMathFlags(), and mapFromLLVMFastMathFlags().

setAllowReciprocal()

void llvm::FastMathFlags::setAllowReciprocal ( bool  B = true )

inline

Definition at line 88 of file FMF.h.

References AllowReciprocal, and B.

Referenced by getDecodedFastMathFlags(), llvm::VPRecipeWithIRFlags::getFastMathFlags(), and mapFromLLVMFastMathFlags().

setApproxFunc()

void llvm::FastMathFlags::setApproxFunc ( bool  B = true )

inline

Definition at line 94 of file FMF.h.

References ApproxFunc, and B.

Referenced by getDecodedFastMathFlags(), llvm::VPRecipeWithIRFlags::getFastMathFlags(), and mapFromLLVMFastMathFlags().

setFast()

void llvm::FastMathFlags::setFast ( bool  B = true )

inline

Definition at line 97 of file FMF.h.

References B, clear(), and set().

Referenced by getDecodedFastMathFlags(), and getFast().

setNoInfs()

void llvm::FastMathFlags::setNoInfs ( bool  B = true )

inline

Definition at line 82 of file FMF.h.

References B, and NoInfs.

Referenced by getDecodedFastMathFlags(), llvm::VPRecipeWithIRFlags::getFastMathFlags(), and mapFromLLVMFastMathFlags().

setNoNaNs()

void llvm::FastMathFlags::setNoNaNs ( bool  B = true )

inline

Definition at line 79 of file FMF.h.

References B, and NoNaNs.

Referenced by getDecodedFastMathFlags(), llvm::VPRecipeWithIRFlags::getFastMathFlags(), llvm::RecurrenceDescriptor::isReductionPHI(), and mapFromLLVMFastMathFlags().

setNoSignedZeros()

void llvm::FastMathFlags::setNoSignedZeros ( bool  B = true )

inline

Definition at line 85 of file FMF.h.

References B, and NoSignedZeros.

Referenced by getDecodedFastMathFlags(), llvm::VPRecipeWithIRFlags::getFastMathFlags(), llvm::RecurrenceDescriptor::isReductionPHI(), mapFromLLVMFastMathFlags(), llvm::matchDecomposedSelectPattern(), and llvm::InstCombinerImpl::visitCallInst().

unionValue()

static FastMathFlags llvm::FastMathFlags::unionValue ( FastMathFlags  LHS, FastMathFlags  RHS  )

inlinestatic

Union value flags.

Definition at line 121 of file FMF.h.

References FastMathFlags(), LHS, NoInfs, NoNaNs, NoSignedZeros, and RHS.

Referenced by convertFSqrtDivIntoFMul().

Friends And Related Function Documentation

FPMathOperator

friend class FPMathOperator

friend

Definition at line 22 of file FMF.h.

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

• include/llvm/IR/FMF.h
• lib/IR/Operator.cpp