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. More...
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. More...
void	setAllowReassoc (bool B=true)
	Flag setters. More...
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. More...

Static Public Member Functions
static FastMathFlags	getFast ()

Friends
class	FPMathOperator

Detailed Description

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

Definition at line 21 of file FMF.h.

Member Enumeration Documentation

anonymous enum

anonymous enum

Enumerator
AllowReassoc
NoNaNs
NoInfs
NoSignedZeros
AllowReciprocal
AllowContract
ApproxFunc

Definition at line 40 of file FMF.h.

Constructor & Destructor Documentation

FastMathFlags()

llvm::FastMathFlags::FastMathFlags ( )

default

Member Function Documentation

all()

bool llvm::FastMathFlags::all ( ) const

inline

Definition at line 60 of file FMF.h.

Referenced by isFast(), and print().

allowContract()

bool llvm::FastMathFlags::allowContract ( ) const

inline

Definition at line 71 of file FMF.h.

References AllowContract.

Referenced by llvm::MachineInstr::copyFlagsFromInstruction(), instCombineSVEVectorFMLA(), and print().

allowReassoc()

bool llvm::FastMathFlags::allowReassoc ( ) const

inline

Flag queries.

Definition at line 66 of file FMF.h.

References AllowReassoc.

Referenced by llvm::MachineInstr::copyFlagsFromInstruction(), getISDForVPIntrinsic(), print(), simplifyFAddInst(), simplifyFDivInst(), simplifyFMAFMul(), and simplifyFSubInst().

allowReciprocal()

bool llvm::FastMathFlags::allowReciprocal ( ) const

inline

Definition at line 70 of file FMF.h.

References AllowReciprocal.

Referenced by llvm::MachineInstr::copyFlagsFromInstruction(), and print().

any()

bool llvm::FastMathFlags::any ( ) const

inline

Definition at line 58 of file FMF.h.

approxFunc()

bool llvm::FastMathFlags::approxFunc ( ) const

inline

Definition at line 72 of file FMF.h.

References ApproxFunc.

Referenced by llvm::MachineInstr::copyFlagsFromInstruction(), and print().

clear()

void llvm::FastMathFlags::clear ( )

inline

Definition at line 62 of file FMF.h.

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

getFast()

static FastMathFlags llvm::FastMathFlags::getFast ( )

inlinestatic

Definition at line 52 of file FMF.h.

References setFast().

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

isFast()

bool llvm::FastMathFlags::isFast ( ) const

inline

'Fast' means all bits are set.

Definition at line 74 of file FMF.h.

References all().

noInfs()

bool llvm::FastMathFlags::noInfs ( ) const

inline

Definition at line 68 of file FMF.h.

References NoInfs.

Referenced by llvm::MachineInstr::copyFlagsFromInstruction(), foldFNegIntoConstant(), print(), and simplifyFPOp().

noNaNs()

bool llvm::FastMathFlags::noNaNs ( ) const

inline

Definition at line 67 of file FMF.h.

References NoNaNs.

Referenced by llvm::canIgnoreSNaN(), llvm::MachineInstr::copyFlagsFromInstruction(), isKnownNonNaN(), llvm::RecurrenceDescriptor::isRecurrenceInstr(), print(), simplifyFAddInst(), simplifyFCmpInst(), simplifyFDivInst(), simplifyFMAFMul(), simplifyFPOp(), simplifyFRemInst(), and simplifyFSubInst().

none()

bool llvm::FastMathFlags::none ( ) const

inline

Definition at line 59 of file FMF.h.

noSignedZeros()

bool llvm::FastMathFlags::noSignedZeros ( ) const

inline

Definition at line 69 of file FMF.h.

References NoSignedZeros.

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

operator!=()

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

inline

Definition at line 106 of file FMF.h.

operator&=()

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

inline

Definition at line 100 of file FMF.h.

operator|=()

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

inline

Definition at line 103 of file FMF.h.

print()

void llvm::FastMathFlags::print

(

raw_ostream &

O

)

const

Print fast-math flags to O.

Definition at line 230 of file Operator.cpp.

References all(), allowContract(), allowReassoc(), allowReciprocal(), approxFunc(), noInfs(), noNaNs(), noSignedZeros(), and llvm::RISCVFenceField::O.

Referenced by llvm::operator<<().

set()

void llvm::FastMathFlags::set ( )

inline

Definition at line 63 of file FMF.h.

Referenced by setFast().

setAllowContract()

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

inline

Definition at line 92 of file FMF.h.

References AllowContract, and B.

Referenced by getDecodedFastMathFlags().

setAllowReassoc()

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

inline

Flag setters.

Definition at line 77 of file FMF.h.

References AllowReassoc, and B.

Referenced by getDecodedFastMathFlags().

setAllowReciprocal()

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

inline

Definition at line 89 of file FMF.h.

References AllowReciprocal, and B.

Referenced by getDecodedFastMathFlags().

setApproxFunc()

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

inline

Definition at line 95 of file FMF.h.

References ApproxFunc, and B.

Referenced by getDecodedFastMathFlags().

setFast()

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

inline

Definition at line 98 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 83 of file FMF.h.

References B, and NoInfs.

Referenced by getDecodedFastMathFlags().

setNoNaNs()

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

inline

Definition at line 80 of file FMF.h.

References B, and NoNaNs.

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

setNoSignedZeros()

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

inline

Definition at line 86 of file FMF.h.

References B, and NoSignedZeros.

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

Friends And Related Function Documentation

FPMathOperator

friend class FPMathOperator

friend

Definition at line 23 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