llvm::GFConstant Class Reference

An floating-point-like constant. More...

#include "llvm/CodeGen/GlobalISel/Utils.h"

Public Types
enum class	GFConstantKind { Scalar , FixedVector , ScalableVector }

Public Member Functions
	GFConstant (ArrayRef< APFloat > Values)
	GFConstant (const APFloat &Value, GFConstantKind Kind)
GFConstantKind	getKind () const
	Returns the kind of of this constant, e.g, Scalar.
const_iterator	begin () const
const_iterator	end () const
size_t	size () const
LLVM_ABI APFloat	getScalarValue () const
	Returns the value, if this constant is a scalar.

Static Public Member Functions
static LLVM_ABI std::optional< GFConstant >	getConstant (Register Const, const MachineRegisterInfo &MRI)

Detailed Description

An floating-point-like constant.

It abstracts over scalar, fixed-length vectors, and scalable vectors. In the common case, it provides a common API and feels like an APFloat, while still providing low-level access. It can be used for constant-folding.

bool isZero() abstracts over the kind.

switch(const.getKind()) { } provides low-level access.

Definition at line 691 of file Utils.h.

Member Enumeration Documentation

GFConstantKind

enum class llvm::GFConstant::GFConstantKind

strong

Enumerator
Scalar
FixedVector
ScalableVector

Definition at line 696 of file Utils.h.

Constructor & Destructor Documentation

GFConstant() [1/2]

llvm::GFConstant::GFConstant ( ArrayRef< APFloat > Values )

inline

Definition at line 703 of file Utils.h.

References FixedVector.

Referenced by getConstant().

GFConstant() [2/2]

llvm::GFConstant::GFConstant ( const APFloat & Value, GFConstantKind Kind )

inline

Definition at line 705 of file Utils.h.

Member Function Documentation

begin()

const_iterator llvm::GFConstant::begin ( ) const

inline

Definition at line 712 of file Utils.h.

References assert(), and ScalableVector.

end()

const_iterator llvm::GFConstant::end ( ) const

inline

Definition at line 718 of file Utils.h.

References assert(), and ScalableVector.

getConstant()

std::optional< GFConstant > llvm::GFConstant::getConstant ( Register Const, const MachineRegisterInfo & MRI )

static

Definition at line 2098 of file Utils.cpp.

References llvm::dyn_cast(), llvm::getDefIgnoringCopies(), llvm::getFConstantVRegValWithLookThrough(), GFConstant(), I, MRI, ScalableVector, Scalar, and llvm::Splat.

Referenced by llvm::CombinerHelper::matchCanonicalizeFCmp().

getKind()

GFConstantKind llvm::GFConstant::getKind ( ) const

inline

Returns the kind of of this constant, e.g, Scalar.

Definition at line 710 of file Utils.h.

getScalarValue()

APFloat llvm::GFConstant::getScalarValue

(

)

const

Returns the value, if this constant is a scalar.

Definition at line 2091 of file Utils.cpp.

References assert(), and Scalar.

size()

size_t llvm::GFConstant::size ( ) const

inline

Definition at line 724 of file Utils.h.

References assert(), and FixedVector.

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

• include/llvm/CodeGen/GlobalISel/Utils.h
• lib/CodeGen/GlobalISel/Utils.cpp