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.
APFloat	getScalarValue () const
	Returns the value, if this constant is a scalar.

Static Public Member Functions
static 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 645 of file Utils.h.

Member Enumeration Documentation

GFConstantKind

enum class llvm::GFConstant::GFConstantKind

strong

Enumerator
Scalar
FixedVector
ScalableVector

Definition at line 647 of file Utils.h.

Constructor & Destructor Documentation

GFConstant() [1/2]

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

inline

Definition at line 654 of file Utils.h.

GFConstant() [2/2]

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

inline

Definition at line 656 of file Utils.h.

References llvm::SmallVectorTemplateBase< T, bool >::push_back().

Member Function Documentation

getConstant()

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

static

Definition at line 2014 of file Utils.cpp.

References llvm::getDefIgnoringCopies(), llvm::getFConstantVRegValWithLookThrough(), I, MRI, llvm::SmallVectorTemplateBase< T, bool >::push_back(), 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 661 of file Utils.h.

getScalarValue()

APFloat llvm::GFConstant::getScalarValue

(

)

const

Returns the value, if this constant is a scalar.

Definition at line 2007 of file Utils.cpp.

References assert(), and Scalar.

---

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

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