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) , FlagEnd = (1 << 7) }

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
LLVM_ABI 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.

Static Public Attributes
static constexpr unsigned	AllFlagsMask = FlagEnd - 1

Friends
class	FPMathOperator

Detailed Description

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

Definition at line 22 of file FMF.h.

Member Enumeration Documentation

anonymous enum

anonymous enum

Enumerator
AllowReassoc
NoNaNs
NoInfs
NoSignedZeros
AllowReciprocal
AllowContract
ApproxFunc
FlagEnd

Definition at line 35 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 58 of file FMF.h.

References AllFlagsMask.

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

allowContract()

bool llvm::FastMathFlags::allowContract ( ) const

inline

Definition at line 69 of file FMF.h.

References AllowContract.

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

allowReassoc()

bool llvm::FastMathFlags::allowReassoc ( ) const

inline

Flag queries.

Definition at line 64 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 68 of file FMF.h.

References AllowReciprocal.

Referenced by mapToLLVMFastMathFlags(), and print().

any()

bool llvm::FastMathFlags::any ( ) const

inline

Definition at line 56 of file FMF.h.

approxFunc()

bool llvm::FastMathFlags::approxFunc ( ) const

inline

Definition at line 70 of file FMF.h.

References ApproxFunc.

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

clear()

void llvm::FastMathFlags::clear ( )

inline

Definition at line 60 of file FMF.h.

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

getFast()

static FastMathFlags llvm::FastMathFlags::getFast ( )

inlinestatic

Definition at line 50 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 112 of file FMF.h.

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

Referenced by convertFSqrtDivIntoFMul(), and foldFNegIntoConstant().

isFast()

bool llvm::FastMathFlags::isFast ( ) const

inline

'Fast' means all bits are set.

Definition at line 72 of file FMF.h.

References all().

noInfs()

bool llvm::FastMathFlags::noInfs ( ) const

inline

Definition at line 66 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 65 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 57 of file FMF.h.

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

noSignedZeros()

bool llvm::FastMathFlags::noSignedZeros ( ) const

inline

Definition at line 67 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 104 of file FMF.h.

operator&=()

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

inline

Definition at line 98 of file FMF.h.

operator|=()

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

inline

Definition at line 101 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::VPIRFlags::printFlags().

set()

void llvm::FastMathFlags::set ( )

inline

Definition at line 61 of file FMF.h.

References AllFlagsMask.

Referenced by canConvertToFMA(), and setFast().

setAllowContract()

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

inline

Definition at line 90 of file FMF.h.

References AllowContract, and B.

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

setAllowReassoc()

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

inline

Flag setters.

Definition at line 75 of file FMF.h.

References AllowReassoc, and B.

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

setAllowReciprocal()

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

inline

Definition at line 87 of file FMF.h.

References AllowReciprocal, and B.

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

setApproxFunc()

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

inline

Definition at line 93 of file FMF.h.

References ApproxFunc, and B.

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

setFast()

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

inline

Definition at line 96 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 81 of file FMF.h.

References B, and NoInfs.

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

setNoNaNs()

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

inline

Definition at line 78 of file FMF.h.

References B, and NoNaNs.

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

setNoSignedZeros()

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

inline

Definition at line 84 of file FMF.h.

References B, and NoSignedZeros.

Referenced by getDecodedFastMathFlags(), llvm::VPIRFlags::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 120 of file FMF.h.

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

Referenced by convertFSqrtDivIntoFMul(), and foldFNegIntoConstant().

Friends And Related Function Documentation

FPMathOperator

friend class FPMathOperator

friend

Definition at line 24 of file FMF.h.

Member Data Documentation

AllFlagsMask

constexpr unsigned llvm::FastMathFlags::AllFlagsMask = FlagEnd - 1

staticconstexpr

Definition at line 46 of file FMF.h.

Referenced by all(), and set().

---

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

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