LLVM 24.0.0git
Public Types | Public Member Functions | Static Public Member Functions | Public Attributes | Static Public Attributes | List of all members
llvm::KnownFPClass Struct Reference

#include "llvm/Support/KnownFPClass.h"

Public Types

enum class  MinMaxKind {
  minimum , maximum , minimumnum , maximumnum ,
  minnum , maxnum
}

Public Member Functions

FPClassTest getKnownFPClasses () const
 Floating-point classes the value could be one of.
void setKnownFPClasses (FPClassTest Classes)
std::optional< bool > getSignBit () const
 std::nullopt if the sign bit is unknown, true if the sign bit is definitely set or false if the sign bit is definitely unset.
void setSignBit (std::optional< bool > Sign)
 KnownFPClass (FPClassTest Known=fcAllFlags, std::optional< bool > Sign={})
LLVM_ABI KnownFPClass (const APFloat &C)
bool operator== (KnownFPClass Other) const
bool isKnownNever (FPClassTest Mask) const
 Return true if it's known this can never be one of the mask entries.
bool isKnownAlways (FPClassTest Mask) const
bool isUnknown () const
bool isKnownNeverNaN () const
 Return true if it's known this can never be a nan.
bool isKnownAlwaysNaN () const
 Return true if it's known this must always be a nan.
bool isKnownNeverInfinity () const
 Return true if it's known this can never be an infinity.
bool isKnownNeverInfOrNaN () const
 Return true if it's known this can never be an infinity or nan.
bool isKnownNeverPosInfinity () const
 Return true if it's known this can never be +infinity.
bool isKnownNeverNegInfinity () const
 Return true if it's known this can never be -infinity.
bool isKnownNeverSubnormal () const
 Return true if it's known this can never be a subnormal.
bool isKnownNeverPosSubnormal () const
 Return true if it's known this can never be a positive subnormal.
bool isKnownNeverNegSubnormal () const
 Return true if it's known this can never be a negative subnormal.
bool isKnownNeverZero () const
 Return true if it's known this can never be a zero.
bool isKnownNeverPosZero () const
 Return true if it's known this can never be a literal positive zero.
bool isKnownNeverNegZero () const
 Return true if it's known this can never be a negative zero.
LLVM_ABI bool isKnownNeverLogicalZero (DenormalMode Mode) const
 Return true if it's known this can never be interpreted as a zero.
LLVM_ABI bool isKnownNeverLogicalNegZero (DenormalMode Mode) const
 Return true if it's known this can never be interpreted as a negative zero.
LLVM_ABI bool isKnownNeverLogicalPosZero (DenormalMode Mode) const
 Return true if it's known this can never be interpreted as a positive zero.
bool cannotBeOrderedLessThanZero () const
 Return true if we can prove that the analyzed floating-point value is either NaN or never less than -0.0.
bool cannotBeOrderedGreaterThanZero () const
 Return true if we can prove that the analyzed floating-point value is either NaN or never greater than -0.0.
bool cannotBeOrderedLessEqZero (DenormalMode Mode) const
 Return true if it's known this can never be a positive value or a logical 0.
bool cannotBeOrderedGreaterEqZero (DenormalMode Mode) const
 Return true if it's know this can never be a negative value or a logical 0.
KnownFPClass intersectWith (const KnownFPClass &RHS) const
KnownFPClass unionWith (const KnownFPClass &RHS) const
KnownFPClass & operator|= (const KnownFPClass &RHS)
void knownNot (FPClassTest RuleOut)
void fneg ()
void fabs ()
LLVM_ABI KnownBits toKnownBits (const fltSemantics &FltSemantics) const
 Report known bits for a float with provided semantics.
bool signBitIsZeroOrNaN () const
 Return true if the sign bit must be 0, ignoring the sign of nans.
void signBitMustBeZero ()
 Assume the sign bit is zero.
void signBitMustBeOne ()
 Assume the sign bit is one.
void copysign (const KnownFPClass &Sign)
void propagateNonSNaN (const KnownFPClass &Src)
void propagateNonSNaN (const KnownFPClass &LHS, const KnownFPClass &RHS)
void propagateNonNaN (const KnownFPClass &Src)
void propagateNonNaN (const KnownFPClass &LHS, const KnownFPClass &RHS)
void propagateXorSign (const KnownFPClass &LHS, const KnownFPClass &RHS, DenormalMode Mode)
LLVM_ABI void propagateDenormal (const KnownFPClass &Src, DenormalMode Mode)
 Propagate knowledge from a source value that could be a denormal or zero.
LLVM_ABI void propagateCanonicalizingSrc (const KnownFPClass &Src, DenormalMode Mode)
 Report known classes if Src is evaluated through a potentially canonicalizing operation.
void resetAll ()

Static Public Member Functions

static LLVM_ABI KnownFPClass applyInputDenormalMode (const KnownFPClass &Src, DenormalMode Mode)
 Return the known classes of Src after passing through an input that may flush subnormals to zero according to Mode.
static LLVM_ABI KnownFPClass applyOutputDenormalMode (const KnownFPClass &Src, DenormalMode Mode)
 Return the known classes of Src after producing an output that may flush subnormals to zero according to Mode.
static KnownFPClass fneg (const KnownFPClass &Src)
static KnownFPClass fabs (const KnownFPClass &Src)
static LLVM_ABI KnownFPClass minMaxLike (const KnownFPClass &LHS, const KnownFPClass &RHS, MinMaxKind Kind, DenormalMode DenormMode=DenormalMode::getDynamic())
static LLVM_ABI KnownFPClass canonicalize (const KnownFPClass &Src, DenormalMode DenormMode=DenormalMode::getDynamic())
 Apply the canonicalize intrinsic to this value.
static LLVM_ABI KnownFPClass bitcast (const fltSemantics &FltSemantics, const KnownBits &Bits)
 Report known values for a bitcast into a float with provided semantics.
static LLVM_ABI KnownFPClass fadd (const KnownFPClass &LHS, const KnownFPClass &RHS, DenormalMode Mode=DenormalMode::getDynamic())
 Report known values for fadd.
static LLVM_ABI KnownFPClass fadd_self (const KnownFPClass &Src, DenormalMode Mode=DenormalMode::getDynamic())
 Report known values for fadd x, x.
static LLVM_ABI KnownFPClass fsub (const KnownFPClass &LHS, const KnownFPClass &RHS, DenormalMode Mode=DenormalMode::getDynamic())
 Report known values for fsub.
static LLVM_ABI KnownFPClass fmul (const KnownFPClass &LHS, const KnownFPClass &RHS, DenormalMode Mode=DenormalMode::getDynamic())
 Report known values for fmul.
static KnownFPClass square (const KnownFPClass &Src, DenormalMode Mode=DenormalMode::getDynamic())
static LLVM_ABI KnownFPClass fmul (const KnownFPClass &LHS, const APFloat &RHS, DenormalMode Mode=DenormalMode::getDynamic())
static LLVM_ABI KnownFPClass fdiv (const KnownFPClass &LHS, const KnownFPClass &RHS, DenormalMode Mode=DenormalMode::getDynamic())
 Report known values for fdiv.
static LLVM_ABI KnownFPClass fdiv_self (const KnownFPClass &Src, DenormalMode Mode=DenormalMode::getDynamic())
 Report known values for fdiv x, x.
static LLVM_ABI KnownFPClass frem (const KnownFPClass &LHS, const KnownFPClass &RHS, DenormalMode Mode=DenormalMode::getDynamic())
 Report known values for frem.
static LLVM_ABI KnownFPClass frem_self (const KnownFPClass &Src, DenormalMode Mode=DenormalMode::getDynamic())
 Report known values for frem x, x.
static LLVM_ABI KnownFPClass fma (const KnownFPClass &LHS, const KnownFPClass &RHS, const KnownFPClass &Addend, DenormalMode Mode=DenormalMode::getDynamic())
 Report known values for fma.
static LLVM_ABI KnownFPClass fma_square (const KnownFPClass &Squared, const KnownFPClass &Addend, DenormalMode Mode=DenormalMode::getDynamic())
 Report known values for fma squared, squared, addend.
static LLVM_ABI KnownFPClass sqrt (const KnownFPClass &Src, DenormalMode Mode=DenormalMode::getDynamic())
 Propagate known class for sqrt.
static LLVM_ABI KnownFPClass log (const KnownFPClass &Src, DenormalMode Mode=DenormalMode::getDynamic())
 Propagate known class for log/log2/log10.
static LLVM_ABI KnownFPClass exp (const KnownFPClass &Src)
 Report known values for exp, exp2 and exp10.
static LLVM_ABI KnownFPClass sin (const KnownFPClass &Src)
 Report known values for sin.
static LLVM_ABI KnownFPClass cos (const KnownFPClass &Src)
 Report known values for cos.
static LLVM_ABI KnownFPClass tan (const KnownFPClass &Src)
 Report known values for tan.
static LLVM_ABI KnownFPClass sinh (const KnownFPClass &Src)
 Report known values for sinh.
static LLVM_ABI KnownFPClass cosh (const KnownFPClass &Src)
 Report known values for cosh.
static LLVM_ABI KnownFPClass tanh (const KnownFPClass &Src)
 Report known values for tanh.
static LLVM_ABI KnownFPClass asin (const KnownFPClass &Src)
 Report known values for asin.
static LLVM_ABI KnownFPClass acos (const KnownFPClass &Src)
 Report known values for acos.
static LLVM_ABI KnownFPClass atan (const KnownFPClass &Src)
 Report known values for atan.
static LLVM_ABI KnownFPClass atan2 (const KnownFPClass &LHS, const KnownFPClass &RHS, DenormalMode Mode=DenormalMode::getDynamic())
 Report known values for atan2.
static KnownFPClass copysign (const KnownFPClass &KnownMag, const KnownFPClass &KnownSign)
static LLVM_ABI KnownFPClass fpext (const KnownFPClass &KnownSrc, const fltSemantics &DstTy, const fltSemantics &SrcTy)
 Propagate known class for fpext.
static LLVM_ABI KnownFPClass fptrunc (const KnownFPClass &KnownSrc)
 Propagate known class for fptrunc.
static LLVM_ABI KnownFPClass roundToIntegral (const KnownFPClass &Src, bool IsTrunc, bool IsMultiUnitFPType, DenormalMode Mode=DenormalMode::getDynamic())
 Propagate known class for rounding intrinsics (trunc, floor, ceil, rint, nearbyint, round, roundeven).
static LLVM_ABI KnownFPClass frexp_mant (const KnownFPClass &Src, DenormalMode Mode=DenormalMode::getDynamic())
 Propagate known class for mantissa component of frexp.
static LLVM_ABI KnownFPClass ldexp (const KnownFPClass &Src, const APInt &ConstantRangeMin, const APInt &ConstantRangeMax, const fltSemantics &Flt, DenormalMode Mode=DenormalMode::getDynamic())
 Propagate known class for ldexp, assuming the exponent is known to be within [ConstantRangeMin, ConstantRangeMax].
static LLVM_ABI KnownFPClass ldexp (const KnownFPClass &Src, const KnownBits &ExpBits, const fltSemantics &Flt, DenormalMode Mode=DenormalMode::getDynamic())
static LLVM_ABI KnownFPClass pow (const KnownFPClass &LHS, const KnownFPClass &RHS)
 Propagate known class for pow.
static LLVM_ABI KnownFPClass powi (const KnownFPClass &Src, const KnownBits &N)
 Propagate known class for powi.

Public Attributes

FPClassTest KnownFPClassesValue = fcAllFlags
std::optional< bool > SignBitValue

Static Public Attributes

static constexpr FPClassTest OrderedLessThanZeroMask
static constexpr FPClassTest OrderedGreaterThanZeroMask

Detailed Description

Definition at line 27 of file KnownFPClass.h.

Member Enumeration Documentation

◆ MinMaxKind

enum class llvm::KnownFPClass::MinMaxKind
strong
Enumerator
minimum 
maximum 
minimumnum 
maximumnum 
minnum 
maxnum 

Definition at line 243 of file KnownFPClass.h.

Constructor & Destructor Documentation

◆ KnownFPClass() [1/2]

llvm::KnownFPClass::KnownFPClass ( FPClassTest Known = fcAllFlags,
std::optional< bool > Sign = {} )
inline

Definition at line 42 of file KnownFPClass.h.

References llvm::fcAllFlags, and llvm::Known.

Referenced by acos(), applyInputDenormalMode(), applyOutputDenormalMode(), asin(), atan(), atan2(), bitcast(), canonicalize(), copysign(), copysign(), cos(), cosh(), exp(), fabs(), fadd(), fadd_self(), fdiv(), fdiv_self(), fma(), fma_square(), fmul(), fmul(), fneg(), fpext(), fptrunc(), frem(), frem_self(), frexp_mant(), fsub(), intersectWith(), ldexp(), ldexp(), log(), minMaxLike(), operator==(), operator|=(), pow(), powi(), propagateCanonicalizingSrc(), propagateDenormal(), propagateNonNaN(), propagateNonNaN(), propagateNonSNaN(), propagateNonSNaN(), propagateXorSign(), resetAll(), roundToIntegral(), sin(), sinh(), sqrt(), square(), tan(), tanh(), and unionWith().

◆ KnownFPClass() [2/2]

KnownFPClass::KnownFPClass ( const APFloat & C)

Definition at line 21 of file KnownFPClass.cpp.

References C(), KnownFPClassesValue, and setSignBit().

Member Function Documentation

◆ acos()

KnownFPClass KnownFPClass::acos ( const KnownFPClass & Src)
static

Report known values for acos.

Definition at line 921 of file KnownFPClass.cpp.

References llvm::fcInf, llvm::fcNegative, llvm::fcPosNormal, llvm::fcSubnormal, llvm::fcZero, isKnownNever(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass().

◆ applyInputDenormalMode()

KnownFPClass KnownFPClass::applyInputDenormalMode ( const KnownFPClass & Src,
DenormalMode Mode )
static

Return the known classes of Src after passing through an input that may flush subnormals to zero according to Mode.

Definition at line 26 of file KnownFPClass.cpp.

References llvm::fcNegSubnormal, llvm::fcNegZero, llvm::fcPosSubnormal, llvm::fcPosZero, llvm::fcSubnormal, getKnownFPClasses(), llvm::DenormalMode::IEEE, llvm::Known, KnownFPClass(), llvm_unreachable, llvm::DenormalMode::PositiveZero, and llvm::DenormalMode::PreserveSign.

Referenced by atan2(), isKnownNeverLogicalNegZero(), isKnownNeverLogicalPosZero(), isKnownNeverLogicalZero(), and ldexp().

◆ applyOutputDenormalMode()

KnownFPClass KnownFPClass::applyOutputDenormalMode ( const KnownFPClass & Src,
DenormalMode Mode )
static

Return the known classes of Src after producing an output that may flush subnormals to zero according to Mode.

Definition at line 59 of file KnownFPClass.cpp.

References llvm::fcNegSubnormal, llvm::fcNegZero, llvm::fcPosSubnormal, llvm::fcPosZero, llvm::fcSubnormal, getKnownFPClasses(), llvm::DenormalMode::IEEE, llvm::Known, KnownFPClass(), llvm_unreachable, llvm::DenormalMode::PositiveZero, and llvm::DenormalMode::PreserveSign.

Referenced by atan2(), and ldexp().

◆ asin()

KnownFPClass KnownFPClass::asin ( const KnownFPClass & Src)
static

Report known values for asin.

Definition at line 904 of file KnownFPClass.cpp.

References llvm::fcInf, llvm::fcNegFinite, isKnownNever(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass().

◆ atan()

KnownFPClass KnownFPClass::atan ( const KnownFPClass & Src)
static

Report known values for atan.

Definition at line 942 of file KnownFPClass.cpp.

References llvm::fcInf, llvm::fcNegative, isKnownNever(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass().

◆ atan2()

KnownFPClass KnownFPClass::atan2 ( const KnownFPClass & LHS,
const KnownFPClass & RHS,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Report known values for atan2.

Definition at line 957 of file KnownFPClass.cpp.

References applyInputDenormalMode(), applyOutputDenormalMode(), llvm::fcInf, llvm::fcNegative, llvm::fcPositive, llvm::fcSubnormal, llvm::fcZero, isKnownNever(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass().

◆ bitcast()

KnownFPClass KnownFPClass::bitcast ( const fltSemantics & FltSemantics,
const KnownBits & Bits )
static

Report known values for a bitcast into a float with provided semantics.

Definition at line 268 of file KnownFPClass.cpp.

References assert(), llvm::fcInf, llvm::fcNan, llvm::fcNormal, llvm::fcQNan, llvm::fcSNan, llvm::fcSubnormal, llvm::fcZero, llvm::APInt::getBitsSet(), llvm::APInt::getLowBitsSet(), llvm::APFloatBase::isIEEELikeFP(), isZero(), llvm::Known, KnownFPClass(), llvm::fltSemantics::precision, llvm::APFloatBase::S_BFloat, llvm::APFloatBase::S_IEEEdouble, llvm::APFloatBase::S_IEEEhalf, llvm::APFloatBase::S_IEEEquad, llvm::APFloatBase::S_IEEEsingle, llvm::APFloatBase::S_x87DoubleExtended, llvm::APFloatBase::SemanticsToEnum(), and llvm::fltSemantics::sizeInBits.

Referenced by computeKnownFPClass(), llvm::SelectionDAG::computeKnownFPClass(), and tryReduceF64CompareToHiHalf().

◆ cannotBeOrderedGreaterEqZero()

bool llvm::KnownFPClass::cannotBeOrderedGreaterEqZero ( DenormalMode Mode) const
inline

Return true if it's know this can never be a negative value or a logical 0. 

 NaN --> true

x >= -0 --> false nsub --> true if mode is ieee, false otherwise. x < -0 --> true

Definition at line 159 of file KnownFPClass.h.

References llvm::fcPositive, isKnownNever(), isKnownNeverLogicalNegZero(), and Mode.

Referenced by llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ cannotBeOrderedGreaterThanZero()

bool llvm::KnownFPClass::cannotBeOrderedGreaterThanZero ( ) const
inline

Return true if we can prove that the analyzed floating-point value is either NaN or never greater than -0.0.

NaN --> true +0 --> true -0 --> true x > +0 --> false x < -0 --> true

Definition at line 137 of file KnownFPClass.h.

References isKnownNever(), and OrderedGreaterThanZeroMask.

Referenced by fadd_impl(), and ldexp().

◆ cannotBeOrderedLessEqZero()

bool llvm::KnownFPClass::cannotBeOrderedLessEqZero ( DenormalMode Mode) const
inline

Return true if it's known this can never be a positive value or a logical 0. 

 NaN --> true

x <= +0 --> false psub --> true if mode is ieee, false otherwise. x > +0 --> true

Definition at line 148 of file KnownFPClass.h.

References llvm::fcNegative, isKnownNever(), isKnownNeverLogicalPosZero(), and Mode.

◆ cannotBeOrderedLessThanZero()

bool llvm::KnownFPClass::cannotBeOrderedLessThanZero ( ) const
inline

Return true if we can prove that the analyzed floating-point value is either NaN or never less than -0.0. 

 NaN --> true
  +0 --> true
  -0 --> true

x > +0 --> true x < -0 --> false

Definition at line 126 of file KnownFPClass.h.

References isKnownNever(), and OrderedLessThanZeroMask.

Referenced by computeKnownFPClass(), fadd_impl(), fptrunc(), ldexp(), log(), simplifyFCmpInst(), simplifyUnaryIntrinsic(), and sqrt().

◆ canonicalize()

KnownFPClass KnownFPClass::canonicalize ( const KnownFPClass & Src,
DenormalMode DenormMode = DenormalMode::getDynamic() )
static

Apply the canonicalize intrinsic to this value.

This is essentially a stronger form of propagateCanonicalizingSrc.

Definition at line 212 of file KnownFPClass.cpp.

References llvm::fcNan, llvm::fcNegSubnormal, llvm::fcNegZero, llvm::fcPosSubnormal, llvm::fcPosZero, llvm::fcQNan, llvm::fcSNan, llvm::fcSubnormal, llvm::fcZero, llvm::DenormalMode::getIEEE(), getKnownFPClasses(), llvm::DenormalMode::getPreserveSign(), llvm::DenormalMode::IEEE, llvm::DenormalMode::Input, llvm::DenormalMode::inputsAreZero(), isKnownNever(), isKnownNeverNaN(), llvm::Known, KnownFPClass(), llvm::DenormalMode::Output, llvm::DenormalMode::outputsAreZero(), and llvm::DenormalMode::PositiveZero.

Referenced by computeKnownFPClass(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ copysign() [1/2]

KnownFPClass llvm::KnownFPClass::copysign ( const KnownFPClass & KnownMag,
const KnownFPClass & KnownSign )
inlinestatic

Definition at line 420 of file KnownFPClass.h.

References llvm::Known, and KnownFPClass().

◆ copysign() [2/2]

void llvm::KnownFPClass::copysign ( const KnownFPClass & Sign)
inline

Definition at line 396 of file KnownFPClass.h.

References llvm::fcInf, llvm::fcNan, llvm::fcNegative, llvm::fcNormal, llvm::fcPositive, llvm::fcSubnormal, llvm::fcZero, getKnownFPClasses(), getSignBit(), isKnownNever(), KnownFPClass(), setKnownFPClasses(), and setSignBit().

Referenced by llvm::InstCombinerImpl::SimplifyDemandedUseFPClass(), and llvm::InstCombinerImpl::SimplifyMultipleUseDemandedFPClass().

◆ cos()

KnownFPClass KnownFPClass::cos ( const KnownFPClass & Src)
static

Report known values for cos.

Definition at line 846 of file KnownFPClass.cpp.

References KnownFPClass(), and sin().

Referenced by computeKnownFPClass().

◆ cosh()

KnownFPClass KnownFPClass::cosh ( const KnownFPClass & Src)
static

Report known values for cosh.

Definition at line 877 of file KnownFPClass.cpp.

References llvm::fcNegative, llvm::fcSubnormal, llvm::fcZero, llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass().

◆ exp()

KnownFPClass KnownFPClass::exp ( const KnownFPClass & Src)
static

Report known values for exp, exp2 and exp10.

This function assumes that exp10(-1.0) = +0.1 and exp10(+1.0) = +10.0 are both finite normal values, which holds for formats with a corresponding LLVM IR type (e.g. does not hold for Float4E2M1FN).

Definition at line 759 of file KnownFPClass.cpp.

References llvm::fcNegative, llvm::fcNegInf, llvm::fcNegNormal, llvm::fcPosInf, llvm::fcPosNormal, llvm::fcPosSubnormal, llvm::fcPosZero, isKnownNever(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ fabs() [1/2]

void llvm::KnownFPClass::fabs ( )
inline

Definition at line 220 of file KnownFPClass.h.

References llvm::fcNegInf, llvm::fcNegNormal, llvm::fcNegSubnormal, llvm::fcNegZero, llvm::fcPosInf, llvm::fcPosNormal, llvm::fcPosSubnormal, llvm::fcPosZero, getKnownFPClasses(), setKnownFPClasses(), and signBitMustBeZero().

Referenced by simplifyDemandedFPClassFabs(), and simplifyDemandedFPClassFnegFabs().

◆ fabs() [2/2]

KnownFPClass llvm::KnownFPClass::fabs ( const KnownFPClass & Src)
inlinestatic

Definition at line 236 of file KnownFPClass.h.

References llvm::Known, and KnownFPClass().

◆ fadd()

KnownFPClass KnownFPClass::fadd ( const KnownFPClass & LHS,
const KnownFPClass & RHS,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Report known values for fadd.

Definition at line 500 of file KnownFPClass.cpp.

References fadd_impl(), llvm::fcNegZero, llvm::DenormalMode::IEEE, isKnownNeverLogicalNegZero(), llvm::Known, KnownFPClass(), and llvm::DenormalMode::PositiveZero.

Referenced by computeKnownFPClass(), fadd_self(), fsub(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ fadd_self()

KnownFPClass KnownFPClass::fadd_self ( const KnownFPClass & Src,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Report known values for fadd x, x.

Definition at line 518 of file KnownFPClass.cpp.

References fadd(), llvm::fcPosZero, llvm::DenormalMode::IEEE, isKnownNeverLogicalPosZero(), isKnownNeverPosSubnormal(), isKnownNeverSubnormal(), llvm::Known, KnownFPClass(), llvm::DenormalMode::PositiveZero, and llvm::DenormalMode::PreserveSign.

Referenced by computeKnownFPClass(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ fdiv()

KnownFPClass KnownFPClass::fdiv ( const KnownFPClass & LHS,
const KnownFPClass & RHS,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Report known values for fdiv.

Definition at line 603 of file KnownFPClass.cpp.

References llvm::fcFinite, llvm::fcInf, llvm::fcNan, llvm::fcNegNormal, llvm::fcNegSubnormal, llvm::fcNormal, llvm::fcPosNormal, llvm::fcPosSubnormal, llvm::fcSubnormal, llvm::fcZero, isKnownAlways(), isKnownNever(), isKnownNeverInfinity(), isKnownNeverLogicalZero(), isKnownNeverNaN(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ fdiv_self()

KnownFPClass KnownFPClass::fdiv_self ( const KnownFPClass & Src,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Report known values for fdiv x, x.

Definition at line 646 of file KnownFPClass.cpp.

References llvm::fcNan, llvm::fcPosNormal, isKnownNeverInfOrNaN(), isKnownNeverLogicalZero(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass().

◆ fma()

KnownFPClass KnownFPClass::fma ( const KnownFPClass & LHS,
const KnownFPClass & RHS,
const KnownFPClass & Addend,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Report known values for fma.

Definition at line 718 of file KnownFPClass.cpp.

References fadd_impl(), llvm::fcSNan, fmul(), isKnownNever(), llvm::Known, KnownFPClass(), and llvm::Mul.

Referenced by computeKnownFPClass(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ fma_square()

KnownFPClass KnownFPClass::fma_square ( const KnownFPClass & Squared,
const KnownFPClass & Addend,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Report known values for fma squared, squared, addend.

Definition at line 739 of file KnownFPClass.cpp.

References fadd_impl(), llvm::fcNan, llvm::fcNegInf, isKnownNever(), llvm::Known, KnownFPClass(), and square().

Referenced by computeKnownFPClass(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ fmul() [1/2]

KnownFPClass KnownFPClass::fmul ( const KnownFPClass & LHS,
const APFloat & RHS,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Definition at line 575 of file KnownFPClass.cpp.

References llvm::APFloatBase::cmpEqual, llvm::APFloat::compareAbsoluteValue(), llvm::fcInf, llvm::fcSubnormal, fmul(), llvm::APFloat::getOne(), llvm::APFloat::getSemantics(), llvm::ilogb(), isKnownNever(), llvm::Known, KnownFPClass(), and llvm::APFloatBase::semanticsPrecision().

◆ fmul() [2/2]

KnownFPClass KnownFPClass::fmul ( const KnownFPClass & LHS,
const KnownFPClass & RHS,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Report known values for fmul.

Definition at line 540 of file KnownFPClass.cpp.

References llvm::fcInf, llvm::fcNan, llvm::fcNormal, llvm::fcSubnormal, llvm::fcZero, isKnownAlways(), isKnownNeverInfinity(), isKnownNeverLogicalZero(), isKnownNeverNaN(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass(), fma(), fmul(), llvm::InstCombinerImpl::SimplifyDemandedUseFPClass(), and square().

◆ fneg() [1/2]

void llvm::KnownFPClass::fneg ( )
inline

Definition at line 208 of file KnownFPClass.h.

References llvm::fneg(), getKnownFPClasses(), getSignBit(), setKnownFPClasses(), and setSignBit().

Referenced by fsub(), and simplifyDemandedFPClassFnegFabs().

◆ fneg() [2/2]

KnownFPClass llvm::KnownFPClass::fneg ( const KnownFPClass & Src)
inlinestatic

Definition at line 214 of file KnownFPClass.h.

References llvm::Known, and KnownFPClass().

◆ fpext()

KnownFPClass KnownFPClass::fpext ( const KnownFPClass & KnownSrc,
const fltSemantics & DstTy,
const fltSemantics & SrcTy )
static

Propagate known class for fpext.

Definition at line 989 of file KnownFPClass.cpp.

References llvm::fcNegNormal, llvm::fcNegSubnormal, llvm::fcPosNormal, llvm::fcPosSubnormal, llvm::fcSubnormal, llvm::APFloatBase::isRepresentableAsNormalIn(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ fptrunc()

KnownFPClass KnownFPClass::fptrunc ( const KnownFPClass & KnownSrc)
static

Propagate known class for fptrunc.

Definition at line 1011 of file KnownFPClass.cpp.

References cannotBeOrderedLessThanZero(), llvm::Known, KnownFPClass(), and OrderedLessThanZeroMask.

Referenced by computeKnownFPClassForFPTrunc(), and simplifyDemandedUseFPClassFPTrunc().

◆ frem()

KnownFPClass KnownFPClass::frem ( const KnownFPClass & LHS,
const KnownFPClass & RHS,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Report known values for frem.

Definition at line 659 of file KnownFPClass.cpp.

References llvm::fcInf, llvm::fcNan, llvm::fcNegFinite, llvm::fcNegNormal, llvm::fcNegSubnormal, llvm::fcNegZero, llvm::fcPosFinite, llvm::fcPosNormal, llvm::fcPosSubnormal, llvm::fcPosZero, isKnownNever(), isKnownNeverInfOrNaN(), isKnownNeverLogicalPosZero(), isKnownNeverLogicalZero(), isKnownNeverNaN(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass().

◆ frem_self()

KnownFPClass KnownFPClass::frem_self ( const KnownFPClass & Src,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Report known values for frem x, x.

Definition at line 697 of file KnownFPClass.cpp.

References llvm::fcNan, llvm::fcNegNormal, llvm::fcNegSubnormal, llvm::fcNegZero, llvm::fcPosNormal, llvm::fcPosSubnormal, llvm::fcPosZero, llvm::fcZero, isKnownNever(), isKnownNeverInfOrNaN(), isKnownNeverLogicalZero(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass().

◆ frexp_mant()

KnownFPClass KnownFPClass::frexp_mant ( const KnownFPClass & Src,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Propagate known class for mantissa component of frexp.

Definition at line 1063 of file KnownFPClass.cpp.

References llvm::fcNegInf, llvm::fcNegNormal, llvm::fcNegSubnormal, llvm::fcNegZero, llvm::fcPosInf, llvm::fcPosNormal, llvm::fcPosSubnormal, llvm::fcPosZero, llvm::fcSubnormal, isKnownNever(), isKnownNeverLogicalNegZero(), isKnownNeverLogicalPosZero(), isKnownNeverNegInfinity(), isKnownNeverPosInfinity(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ fsub()

KnownFPClass KnownFPClass::fsub ( const KnownFPClass & LHS,
const KnownFPClass & RHS,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Report known values for fsub.

Definition at line 534 of file KnownFPClass.cpp.

References fadd(), fneg(), and KnownFPClass().

Referenced by computeKnownFPClass(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ getKnownFPClasses()

FPClassTest llvm::KnownFPClass::getKnownFPClasses ( ) const
inline

Floating-point classes the value could be one of.

Definition at line 32 of file KnownFPClass.h.

References KnownFPClassesValue.

Referenced by applyInputDenormalMode(), applyOutputDenormalMode(), canonicalize(), computeKnownFPClass(), copysign(), fabs(), fneg(), intersectWith(), isKnownNever(), isUnknown(), knownNot(), ldexp(), minMaxLike(), operator==(), operator|=(), printGISelValueTracking(), propagateDenormal(), signBitMustBeOne(), signBitMustBeZero(), simplifyDemandedFPClassMinMax(), toKnownBits(), and unionWith().

◆ getSignBit()

std::optional< bool > llvm::KnownFPClass::getSignBit ( ) const
inline

std::nullopt if the sign bit is unknown, true if the sign bit is definitely set or false if the sign bit is definitely unset.

Definition at line 38 of file KnownFPClass.h.

References SignBitValue.

Referenced by computeKnownFPClass(), copysign(), fneg(), intersectWith(), isUnknown(), knownNot(), minMaxLike(), operator==(), operator|=(), printGISelValueTracking(), simplifyDemandedFPClassCopysignMag(), simplifyDemandedFPClassFabs(), simplifyDemandedFPClassFnegFabs(), llvm::InstCombinerImpl::SimplifyDemandedUseFPClass(), llvm::InstCombinerImpl::SimplifyMultipleUseDemandedFPClass(), simplifyUnaryIntrinsic(), toKnownBits(), and unionWith().

◆ intersectWith()

KnownFPClass llvm::KnownFPClass::intersectWith ( const KnownFPClass & RHS) const
inline

Definition at line 173 of file KnownFPClass.h.

References getKnownFPClasses(), getSignBit(), KnownFPClass(), and RHS.

Referenced by llvm::SelectionDAG::computeKnownFPClass(), llvm::InstCombinerImpl::SimplifyDemandedUseFPClass(), and llvm::InstCombinerImpl::SimplifyMultipleUseDemandedFPClass().

◆ isKnownAlways()

bool llvm::KnownFPClass::isKnownAlways ( FPClassTest Mask) const
inline

Definition at line 56 of file KnownFPClass.h.

References isKnownNever().

Referenced by fdiv(), fmul(), isKnownAlwaysNaN(), simplifyDemandedFPClassCopysignMag(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ isKnownAlwaysNaN()

bool llvm::KnownFPClass::isKnownAlwaysNaN ( ) const
inline

Return true if it's known this must always be a nan.

Definition at line 66 of file KnownFPClass.h.

References llvm::fcNan, and isKnownAlways().

Referenced by simplifyFCmpInst().

◆ isKnownNever()

bool llvm::KnownFPClass::isKnownNever ( FPClassTest Mask) const
inline

Return true if it's known this can never be one of the mask entries.

Definition at line 52 of file KnownFPClass.h.

References llvm::fcNone, and getKnownFPClasses().

Referenced by acos(), addNoUndefAttrs(), asin(), atan(), atan2(), cannotBeOrderedGreaterEqZero(), cannotBeOrderedGreaterThanZero(), cannotBeOrderedLessEqZero(), cannotBeOrderedLessThanZero(), canonicalize(), computeKnownBitsFromOperator(), computeKnownFPClass(), copysign(), exp(), fadd_impl(), fdiv(), fma(), fma_square(), fmul(), foldFPtoI(), frem(), frem_self(), frexp_mant(), isKnownAlways(), isKnownNeverInfinity(), isKnownNeverInfOrNaN(), llvm::GISelValueTracking::isKnownNeverNaN(), isKnownNeverNaN(), isKnownNeverNegInfinity(), isKnownNeverNegSubnormal(), isKnownNeverNegZero(), isKnownNeverPosInfinity(), isKnownNeverPosSubnormal(), isKnownNeverPosZero(), isKnownNeverSubnormal(), isKnownNeverZero(), knownNot(), ldexp(), pow(), powi(), roundToIntegral(), signBitIsZeroOrNaN(), simplifyDemandedFPClassFabs(), simplifyDemandedFPClassFnegFabs(), simplifyDemandedFPClassMinMax(), llvm::InstCombinerImpl::SimplifyDemandedUseFPClass(), llvm::InstCombinerImpl::SimplifyMultipleUseDemandedFPClass(), simplifyX86FPMaxMin(), sinh(), tanh(), and toKnownBits().

◆ isKnownNeverInfinity()

bool llvm::KnownFPClass::isKnownNeverInfinity ( ) const
inline

Return true if it's known this can never be an infinity.

Definition at line 69 of file KnownFPClass.h.

References llvm::fcInf, and isKnownNever().

Referenced by fdiv(), fmul(), inferFastMathValueFlags(), sin(), and tan().

◆ isKnownNeverInfOrNaN()

bool llvm::KnownFPClass::isKnownNeverInfOrNaN ( ) const
inline

Return true if it's known this can never be an infinity or nan.

Definition at line 72 of file KnownFPClass.h.

References llvm::fcInf, llvm::fcNan, and isKnownNever().

Referenced by llvm::GCNTTIImpl::canSimplifyLegacyMulToMul(), llvm::computeConstantRange(), computeKnownFPClass(), fdiv_self(), frem(), frem_self(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ isKnownNeverLogicalNegZero()

bool KnownFPClass::isKnownNeverLogicalNegZero ( DenormalMode Mode) const

Return true if it's known this can never be interpreted as a negative zero.

Definition at line 96 of file KnownFPClass.cpp.

References applyInputDenormalMode(), and isKnownNeverNegZero().

Referenced by cannotBeOrderedGreaterEqZero(), computeKnownFPClass(), fadd(), frexp_mant(), llvm::InstCombinerImpl::SimplifyDemandedUseFPClass(), and sqrt().

◆ isKnownNeverLogicalPosZero()

bool KnownFPClass::isKnownNeverLogicalPosZero ( DenormalMode Mode) const

Return true if it's known this can never be interpreted as a positive zero.

Definition at line 100 of file KnownFPClass.cpp.

References applyInputDenormalMode(), and isKnownNeverPosZero().

Referenced by cannotBeOrderedLessEqZero(), computeKnownFPClass(), fadd_self(), frem(), frexp_mant(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ isKnownNeverLogicalZero()

bool KnownFPClass::isKnownNeverLogicalZero ( DenormalMode Mode) const

Return true if it's known this can never be interpreted as a zero.

This extends isKnownNeverZero to cover the case where the assumed floating-point mode for the function interprets denormals as zero.

Definition at line 92 of file KnownFPClass.cpp.

References applyInputDenormalMode(), and isKnownNeverZero().

Referenced by llvm::GCNTTIImpl::canSimplifyLegacyMulToMul(), llvm::computeConstantRange(), fdiv(), fdiv_self(), fmul(), frem(), frem_self(), log(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ isKnownNeverNaN()

bool llvm::KnownFPClass::isKnownNeverNaN ( ) const
inline

Return true if it's known this can never be a nan.

Definition at line 63 of file KnownFPClass.h.

References llvm::fcNan, and isKnownNever().

Referenced by canonicalize(), computeKnownFPClass(), fadd_impl(), fdiv(), fmul(), llvm::InstCombinerImpl::foldSelectIntoOp(), frem(), inferFastMathValueFlags(), llvm::GISelValueTracking::isKnownNeverNaN(), log(), minMaxLike(), pow(), llvm::InstCombinerImpl::SimplifyDemandedUseFPClass(), simplifyFCmpInst(), simplifyUnaryIntrinsic(), sin(), sqrt(), tan(), and tryReduceF64CompareToHiHalf().

◆ isKnownNeverNegInfinity()

bool llvm::KnownFPClass::isKnownNeverNegInfinity ( ) const
inline

Return true if it's known this can never be -infinity.

Definition at line 78 of file KnownFPClass.h.

References llvm::fcNegInf, and isKnownNever().

Referenced by frexp_mant(), ldexp(), and roundToIntegral().

◆ isKnownNeverNegSubnormal()

bool llvm::KnownFPClass::isKnownNeverNegSubnormal ( ) const
inline

Return true if it's known this can never be a negative subnormal.

Definition at line 87 of file KnownFPClass.h.

References llvm::fcNegSubnormal, and isKnownNever().

Referenced by ldexp().

◆ isKnownNeverNegZero()

bool llvm::KnownFPClass::isKnownNeverNegZero ( ) const
inline

Return true if it's known this can never be a negative zero.

This means a literal -0 and does not include denormal inputs implicitly treated as -0.

Definition at line 98 of file KnownFPClass.h.

References llvm::fcNegZero, and isKnownNever().

Referenced by isKnownNeverLogicalNegZero(), ldexp(), and minMaxLike().

◆ isKnownNeverPosInfinity()

bool llvm::KnownFPClass::isKnownNeverPosInfinity ( ) const
inline

Return true if it's known this can never be +infinity.

Definition at line 75 of file KnownFPClass.h.

References llvm::fcPosInf, and isKnownNever().

Referenced by computeKnownFPClass(), frexp_mant(), ldexp(), log(), roundToIntegral(), and sqrt().

◆ isKnownNeverPosSubnormal()

bool llvm::KnownFPClass::isKnownNeverPosSubnormal ( ) const
inline

Return true if it's known this can never be a positive subnormal.

Definition at line 84 of file KnownFPClass.h.

References llvm::fcPosSubnormal, and isKnownNever().

Referenced by fadd_self(), and ldexp().

◆ isKnownNeverPosZero()

bool llvm::KnownFPClass::isKnownNeverPosZero ( ) const
inline

Return true if it's known this can never be a literal positive zero.

Definition at line 94 of file KnownFPClass.h.

References llvm::fcPosZero, and isKnownNever().

Referenced by isKnownNeverLogicalPosZero(), ldexp(), and minMaxLike().

◆ isKnownNeverSubnormal()

bool llvm::KnownFPClass::isKnownNeverSubnormal ( ) const
inline

Return true if it's known this can never be a subnormal.

Definition at line 81 of file KnownFPClass.h.

References llvm::fcSubnormal, and isKnownNever().

Referenced by llvm::computeConstantRange(), fadd_self(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ isKnownNeverZero()

bool llvm::KnownFPClass::isKnownNeverZero ( ) const
inline

Return true if it's known this can never be a zero.

This means a literal [+-]0, and does not include denormal inputs implicitly treated as [+-]0.

Definition at line 91 of file KnownFPClass.h.

References llvm::fcZero, and isKnownNever().

Referenced by isKnownNeverLogicalZero(), and llvm::LegalizerHelper::lowerFMinimumMaximum().

◆ isUnknown()

bool llvm::KnownFPClass::isUnknown ( ) const
inline

Definition at line 58 of file KnownFPClass.h.

References llvm::fcAllFlags, getKnownFPClasses(), and getSignBit().

Referenced by llvm::adjustKnownFPClassForSelectArm(), computeKnownFPClass(), llvm::SelectionDAG::computeKnownFPClass(), and llvm::InstCombinerImpl::SimplifyMultipleUseDemandedFPClass().

◆ knownNot()

void llvm::KnownFPClass::knownNot ( FPClassTest RuleOut)
inline

Definition at line 198 of file KnownFPClass.h.

References llvm::fcNan, llvm::fcNegative, llvm::fcPositive, getKnownFPClasses(), getSignBit(), isKnownNever(), setKnownFPClasses(), and setSignBit().

Referenced by computeKnownFPClass(), computeKnownFPClassFromCond(), propagateNonNaN(), propagateNonNaN(), propagateNonSNaN(), propagateNonSNaN(), propagateXorSign(), simplifyDemandedFPClassFabs(), simplifyDemandedFPClassFnegFabs(), llvm::InstCombinerImpl::SimplifyDemandedUseFPClass(), and llvm::InstCombinerImpl::SimplifyMultipleUseDemandedFPClass().

◆ ldexp() [1/2]

KnownFPClass KnownFPClass::ldexp ( const KnownFPClass & Src,
const APInt & ConstantRangeMin,
const APInt & ConstantRangeMax,
const fltSemantics & Flt,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Propagate known class for ldexp, assuming the exponent is known to be within [ConstantRangeMin, ConstantRangeMax].

Definition at line 1094 of file KnownFPClass.cpp.

References applyInputDenormalMode(), applyOutputDenormalMode(), cannotBeOrderedGreaterThanZero(), cannotBeOrderedLessThanZero(), llvm::fcNan, llvm::fcNegative, llvm::fcNegInf, llvm::fcNegSubnormal, llvm::fcNegZero, llvm::fcPosInf, llvm::fcPositive, llvm::fcPosSubnormal, llvm::fcPosZero, llvm::fcSubnormal, getKnownFPClasses(), isKnownNever(), isKnownNeverNegInfinity(), isKnownNeverNegSubnormal(), isKnownNeverNegZero(), isKnownNeverPosInfinity(), isKnownNeverPosSubnormal(), isKnownNeverPosZero(), llvm::APInt::isNonNegative(), llvm::APInt::isNonPositive(), llvm::APInt::isZero(), llvm::Known, KnownFPClass(), OrderedGreaterThanZeroMask, OrderedLessThanZeroMask, llvm::APFloatBase::PPCDoubleDouble(), llvm::APFloatBase::semanticsPrecision(), and llvm::APInt::sge().

Referenced by computeKnownFPClass(), ldexp(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ ldexp() [2/2]

KnownFPClass KnownFPClass::ldexp ( const KnownFPClass & Src,
const KnownBits & ExpBits,
const fltSemantics & Flt,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Definition at line 1152 of file KnownFPClass.cpp.

References llvm::KnownBits::getSignedMaxValue(), llvm::KnownBits::getSignedMinValue(), KnownFPClass(), and ldexp().

◆ log()

KnownFPClass KnownFPClass::log ( const KnownFPClass & Src,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Propagate known class for log/log2/log10.

Definition at line 789 of file KnownFPClass.cpp.

References cannotBeOrderedLessThanZero(), llvm::fcNan, llvm::fcNegInf, llvm::fcNegZero, llvm::fcPosInf, llvm::fcSubnormal, isKnownNeverLogicalZero(), isKnownNeverNaN(), isKnownNeverPosInfinity(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ minMaxLike()

KnownFPClass KnownFPClass::minMaxLike ( const KnownFPClass & LHS,
const KnownFPClass & RHS,
MinMaxKind Kind,
DenormalMode DenormMode = DenormalMode::getDynamic() )
static

Definition at line 131 of file KnownFPClass.cpp.

References llvm::fcNan, llvm::fcNone, llvm::fcZero, llvm::DenormalMode::getIEEE(), getKnownFPClasses(), getSignBit(), isKnownNeverNaN(), isKnownNeverNegZero(), isKnownNeverPosZero(), llvm::Known, KnownFPClass(), llvm_unreachable, maximum, maximumnum, maxnum, minimum, minimumnum, minnum, llvm::orderedStrictlyGreater(), llvm::orderedStrictlyLess(), and setSignBit().

Referenced by computeKnownFPClass(), and simplifyDemandedFPClassMinMax().

◆ operator==()

bool llvm::KnownFPClass::operator== ( KnownFPClass Other) const
inline

Definition at line 46 of file KnownFPClass.h.

References getKnownFPClasses(), getSignBit(), KnownFPClass(), and llvm::Other.

◆ operator|=()

KnownFPClass & llvm::KnownFPClass::operator|= ( const KnownFPClass & RHS)
inline

Definition at line 190 of file KnownFPClass.h.

References getKnownFPClasses(), getSignBit(), KnownFPClass(), RHS, setKnownFPClasses(), and setSignBit().

◆ pow()

KnownFPClass KnownFPClass::pow ( const KnownFPClass & LHS,
const KnownFPClass & RHS )
static

Propagate known class for pow.

Definition at line 1159 of file KnownFPClass.cpp.

References llvm::fcNan, llvm::fcNegative, llvm::fcNegInf, llvm::fcNegNormal, llvm::fcNegSubnormal, llvm::fcNegZero, llvm::fcPosNormal, isKnownNever(), isKnownNeverNaN(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass().

◆ powi()

KnownFPClass KnownFPClass::powi ( const KnownFPClass & Src,
const KnownBits & N )
static

Propagate known class for powi.

Definition at line 1201 of file KnownFPClass.cpp.

References llvm::fcInf, llvm::fcNan, llvm::fcNegative, llvm::fcNegInf, llvm::fcNegNormal, llvm::fcNegSubnormal, llvm::fcNegZero, llvm::fcNormal, llvm::fcPosNormal, llvm::fcSNan, llvm::fcSubnormal, llvm::fcZero, llvm::KnownBits::getSignedMaxValue(), llvm::KnownBits::getSignedMinValue(), llvm::KnownBits::isEven(), isKnownNever(), llvm::APInt::isNegative(), llvm::KnownBits::isNegative(), llvm::KnownBits::isNonNegative(), llvm::APInt::isStrictlyPositive(), llvm::APInt::isZero(), llvm::KnownBits::isZero(), llvm::Known, KnownFPClass(), llvm::APInt::sgt(), llvm::APInt::slt(), and llvm::KnownBits::Zero.

Referenced by computeKnownFPClass().

◆ propagateCanonicalizingSrc()

void KnownFPClass::propagateCanonicalizingSrc ( const KnownFPClass & Src,
DenormalMode Mode )

Report known classes if Src is evaluated through a potentially canonicalizing operation.

We can assume signaling nans will not be introduced, but cannot assume a denormal will be flushed under FTZ/DAZ.

This assumes a copy-like operation and will replace any currently known information.

Definition at line 783 of file KnownFPClass.cpp.

References KnownFPClass(), propagateDenormal(), and propagateNonNaN().

◆ propagateDenormal()

void KnownFPClass::propagateDenormal ( const KnownFPClass & Src,
DenormalMode Mode )

Propagate knowledge from a source value that could be a denormal or zero.

We have to be conservative since output flushing is not guaranteed, so known-never-zero may not hold.

This assumes a copy-like operation and will replace any currently known information.

Definition at line 104 of file KnownFPClass.cpp.

References llvm::DenormalMode::Dynamic, llvm::fcNegZero, llvm::fcPosZero, llvm::DenormalMode::getIEEE(), getKnownFPClasses(), llvm::DenormalMode::getPositiveZero(), KnownFPClass(), llvm::DenormalMode::PositiveZero, and setKnownFPClasses().

Referenced by propagateCanonicalizingSrc().

◆ propagateNonNaN() [1/2]

void llvm::KnownFPClass::propagateNonNaN ( const KnownFPClass & LHS,
const KnownFPClass & RHS )
inline

Definition at line 448 of file KnownFPClass.h.

References llvm::fcNan, KnownFPClass(), knownNot(), LHS, propagateNonSNaN(), and RHS.

◆ propagateNonNaN() [2/2]

void llvm::KnownFPClass::propagateNonNaN ( const KnownFPClass & Src)
inline

Definition at line 442 of file KnownFPClass.h.

References llvm::fcNan, KnownFPClass(), knownNot(), and propagateNonSNaN().

Referenced by propagateCanonicalizingSrc().

◆ propagateNonSNaN() [1/2]

void llvm::KnownFPClass::propagateNonSNaN ( const KnownFPClass & LHS,
const KnownFPClass & RHS )
inline

Definition at line 434 of file KnownFPClass.h.

References llvm::fcSNan, KnownFPClass(), knownNot(), LHS, and RHS.

◆ propagateNonSNaN() [2/2]

void llvm::KnownFPClass::propagateNonSNaN ( const KnownFPClass & Src)
inline

Definition at line 428 of file KnownFPClass.h.

References llvm::fcSNan, KnownFPClass(), and knownNot().

Referenced by propagateNonNaN(), and propagateNonNaN().

◆ propagateXorSign()

void llvm::KnownFPClass::propagateXorSign ( const KnownFPClass & LHS,
const KnownFPClass & RHS,
DenormalMode Mode )
inline

Definition at line 457 of file KnownFPClass.h.

References llvm::fcNegative, llvm::fcPosInf, llvm::fcPositive, llvm::fcPosNormal, llvm::fcPosSubnormal, llvm::fcPosZero, KnownFPClass(), knownNot(), LHS, Mode, and RHS.

◆ resetAll()

void llvm::KnownFPClass::resetAll ( )
inline

Definition at line 533 of file KnownFPClass.h.

References KnownFPClass().

◆ roundToIntegral()

KnownFPClass KnownFPClass::roundToIntegral ( const KnownFPClass & Src,
bool IsTrunc,
bool IsMultiUnitFPType,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Propagate known class for rounding intrinsics (trunc, floor, ceil, rint, nearbyint, round, roundeven).

This is trunc if IsTrunc. IsMultiUnitFPType if this is for a multi-unit floating-point type.

Definition at line 1025 of file KnownFPClass.cpp.

References llvm::fcNegFinite, llvm::fcNegInf, llvm::fcNegNormal, llvm::fcNegSubnormal, llvm::fcNegZero, llvm::fcPosFinite, llvm::fcPosInf, llvm::fcPosNormal, llvm::fcPosSubnormal, llvm::fcPosZero, llvm::fcSubnormal, isKnownNever(), isKnownNeverNegInfinity(), isKnownNeverPosInfinity(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ setKnownFPClasses()

void llvm::KnownFPClass::setKnownFPClasses ( FPClassTest Classes)
inline

Definition at line 34 of file KnownFPClass.h.

References KnownFPClassesValue.

Referenced by copysign(), fabs(), fneg(), knownNot(), operator|=(), propagateDenormal(), signBitMustBeOne(), and signBitMustBeZero().

◆ setSignBit()

void llvm::KnownFPClass::setSignBit ( std::optional< bool > Sign)
inline

Definition at line 40 of file KnownFPClass.h.

References SignBitValue.

Referenced by copysign(), fneg(), KnownFPClass(), knownNot(), minMaxLike(), operator|=(), signBitMustBeOne(), and signBitMustBeZero().

◆ signBitIsZeroOrNaN()

bool llvm::KnownFPClass::signBitIsZeroOrNaN ( ) const
inline

Return true if the sign bit must be 0, ignoring the sign of nans.

Definition at line 382 of file KnownFPClass.h.

References llvm::fcNegative, and isKnownNever().

Referenced by llvm::AMDGPUTargetLowering::lowerFPOW().

◆ signBitMustBeOne()

void llvm::KnownFPClass::signBitMustBeOne ( )
inline

Assume the sign bit is one.

Definition at line 391 of file KnownFPClass.h.

References llvm::fcNan, llvm::fcNegative, getKnownFPClasses(), setKnownFPClasses(), and setSignBit().

Referenced by computeKnownFPClassFromCond().

◆ signBitMustBeZero()

void llvm::KnownFPClass::signBitMustBeZero ( )
inline

Assume the sign bit is zero.

Definition at line 385 of file KnownFPClass.h.

References llvm::fcNan, llvm::fcPositive, getKnownFPClasses(), setKnownFPClasses(), and setSignBit().

Referenced by computeKnownFPClassFromCond(), and fabs().

◆ sin()

KnownFPClass KnownFPClass::sin ( const KnownFPClass & Src)
static

Report known values for sin.

Definition at line 833 of file KnownFPClass.cpp.

References llvm::fcInf, llvm::fcNan, isKnownNeverInfinity(), isKnownNeverNaN(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass(), and cos().

◆ sinh()

KnownFPClass KnownFPClass::sinh ( const KnownFPClass & Src)
static

Report known values for sinh.

Definition at line 865 of file KnownFPClass.cpp.

References llvm::fcNegative, isKnownNever(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass().

◆ sqrt()

KnownFPClass KnownFPClass::sqrt ( const KnownFPClass & Src,
DenormalMode Mode = DenormalMode::getDynamic() )
static

Propagate known class for sqrt.

Definition at line 808 of file KnownFPClass.cpp.

References cannotBeOrderedLessThanZero(), llvm::fcNan, llvm::fcNegInf, llvm::fcNegNormal, llvm::fcNegSubnormal, llvm::fcNegZero, llvm::fcPosInf, llvm::fcPosSubnormal, isKnownNeverLogicalNegZero(), isKnownNeverNaN(), isKnownNeverPosInfinity(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ square()

KnownFPClass llvm::KnownFPClass::square ( const KnownFPClass & Src,
DenormalMode Mode = DenormalMode::getDynamic() )
inlinestatic

Definition at line 290 of file KnownFPClass.h.

References llvm::fcNegative, fmul(), llvm::DenormalMode::getDynamic(), llvm::Known, KnownFPClass(), and Mode.

Referenced by computeKnownFPClass(), fma_square(), and llvm::InstCombinerImpl::SimplifyDemandedUseFPClass().

◆ tan()

KnownFPClass KnownFPClass::tan ( const KnownFPClass & Src)
static

Report known values for tan.

Definition at line 850 of file KnownFPClass.cpp.

References llvm::fcInf, llvm::fcNan, isKnownNeverInfinity(), isKnownNeverNaN(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass().

◆ tanh()

KnownFPClass KnownFPClass::tanh ( const KnownFPClass & Src)
static

Report known values for tanh.

Definition at line 889 of file KnownFPClass.cpp.

References llvm::fcInf, llvm::fcNegative, isKnownNever(), llvm::Known, and KnownFPClass().

Referenced by computeKnownFPClass().

◆ toKnownBits()

KnownBits KnownFPClass::toKnownBits ( const fltSemantics & FltSemantics) const

Report known bits for a float with provided semantics.

Definition at line 350 of file KnownFPClass.cpp.

References llvm::BitWidth, llvm::APInt::clearBit(), llvm::fcInf, llvm::fcNan, llvm::fcNone, llvm::fcNormal, llvm::fcQNan, llvm::fcSNan, llvm::fcSubnormal, llvm::fcZero, llvm::APInt::getBitsSet(), llvm::APFloat::getInf(), getKnownFPClasses(), llvm::APInt::getLowBitsSet(), getSignBit(), llvm::APInt::getZero(), isKnownNever(), llvm::Known, llvm_unreachable, llvm::KnownBits::makeConstant(), llvm::fltSemantics::precision, llvm::APFloatBase::S_BFloat, llvm::APFloatBase::S_IEEEdouble, llvm::APFloatBase::S_IEEEhalf, llvm::APFloatBase::S_IEEEquad, llvm::APFloatBase::S_IEEEsingle, llvm::APFloatBase::S_x87DoubleExtended, llvm::APFloatBase::SemanticsToEnum(), and llvm::fltSemantics::sizeInBits.

◆ unionWith()

KnownFPClass llvm::KnownFPClass::unionWith ( const KnownFPClass & RHS) const
inline

Definition at line 179 of file KnownFPClass.h.

References getKnownFPClasses(), getSignBit(), KnownFPClass(), and RHS.

Referenced by llvm::adjustKnownFPClassForSelectArm().

Member Data Documentation

◆ KnownFPClassesValue

FPClassTest llvm::KnownFPClass::KnownFPClassesValue = fcAllFlags

Definition at line 28 of file KnownFPClass.h.

Referenced by getKnownFPClasses(), KnownFPClass(), and setKnownFPClasses().

◆ OrderedGreaterThanZeroMask

FPClassTest llvm::KnownFPClass::OrderedGreaterThanZeroMask
staticconstexpr
Initial value:
=
fcPosSubnormal | fcPosNormal | fcPosInf

Definition at line 115 of file KnownFPClass.h.

Referenced by cannotBeOrderedGreaterThanZero(), fadd_impl(), ldexp(), and simplifyDemandedFPClassFnegFabs().

◆ OrderedLessThanZeroMask

FPClassTest llvm::KnownFPClass::OrderedLessThanZeroMask
staticconstexpr
Initial value:
=
fcNegSubnormal | fcNegNormal | fcNegInf

Definition at line 113 of file KnownFPClass.h.

Referenced by llvm::cannotBeOrderedLessThanZero(), cannotBeOrderedLessThanZero(), computeKnownFPClass(), computeKnownFPClassForFPTrunc(), fadd_impl(), fptrunc(), ldexp(), simplifyDemandedFPClassFabs(), llvm::InstCombinerImpl::SimplifyDemandedUseFPClass(), and simplifyFCmpInst().

◆ SignBitValue

std::optional<bool> llvm::KnownFPClass::SignBitValue

Definition at line 29 of file KnownFPClass.h.

Referenced by getSignBit(), and setSignBit().

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