llvm::ConstantFP Class Reference

#include <Constants.h>

Inheritance diagram for llvm::ConstantFP:

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Collaboration diagram for llvm::ConstantFP:

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List of all members.

Public Member Functions
const APFloat &	getValueAPF () const
virtual bool	isNullValue () const
bool	isExactlyValue (const APFloat &V) const
bool	isExactlyValue (double V) const
Static Public Member Functions
static ConstantFP *	get (const APFloat &V)
	get() - Static factory methods - Return objects of the specified value
static ConstantFP *	get (const Type *Ty, double V)
static bool	isValueValidForType (const Type *Ty, const APFloat &V)
	isValueValidForType - return true if Ty is big enough to represent V.
static ConstantFP *	getNegativeZero (const Type *Ty)
static bool	classof (const ConstantFP *)
	Methods for support type inquiry through isa, cast, and dyn_cast:.
static bool	classof (const Value *V)
Protected Member Functions
	ConstantFP (const Type *Ty, const APFloat &V)
void *	operator new (size_t s)

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Detailed Description

ConstantFP - Floating Point Values [float, double]

Definition at line 226 of file Constants.h.

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Constructor & Destructor Documentation

ConstantFP::ConstantFP	(	const Type *	Ty,
		const APFloat &	V
	)			[protected]

Definition at line 293 of file Constants.cpp.

References llvm::APFloat::getSemantics(), and TypeToFloatSemantics().

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Member Function Documentation

void* llvm::ConstantFP::operator new

(

size_t

s

)

[inline, protected]

Reimplemented from llvm::User.

Definition at line 234 of file Constants.h.

ConstantFP * ConstantFP::get

(

const APFloat &

V

)

[static]

get() - Static factory methods - Return objects of the specified value

Definition at line 349 of file Constants.cpp.

References llvm::Type::DoubleTy, llvm::Type::FloatTy, llvm::Type::FP128Ty, llvm::APFloat::getSemantics(), llvm::APFloat::IEEEdouble, llvm::APFloat::IEEEquad, llvm::APFloat::IEEEsingle, llvm::Type::PPC_FP128Ty, llvm::APFloat::PPCDoubleDouble, llvm::Type::X86_FP80Ty, and llvm::APFloat::x87DoubleExtended.

Referenced by ConstantFoldBinaryFP(), llvm::ConstantFoldBinaryInstruction(), llvm::ConstantFoldCall(), llvm::ConstantFoldCastInstruction(), ConstantFoldFP(), llvm::SelectionDAG::getConstantFP(), llvm::ScalarEvolution::getIntegerSCEV(), getNegativeZero(), llvm::Constant::getNullValue(), and llvm::JIT::runFunction().

ConstantFP * ConstantFP::get	(	const Type *	Ty,
		double	V
	)			[static]

get() - This returns a constant fp for the specified value in the specified type. This should only be used for simple constant values like 2.0/1.0 etc, that are known-valid both as double and as the target format.

get() - This returns a constant fp for the specified value in the specified type. This should only be used for simple constant values like 2.0/1.0 etc, that are known-valid both as double and as the target format.

Definition at line 374 of file Constants.cpp.

References llvm::APFloat::convert(), llvm::APFloat::rmNearestTiesToEven, and TypeToFloatSemantics().

bool ConstantFP::isValueValidForType	(	const Type *	Ty,
		const APFloat &	V
	)			[static]

isValueValidForType - return true if Ty is big enough to represent V.

Definition at line 956 of file Constants.cpp.

References llvm::lltok::APFloat, llvm::APFloat::convert(), llvm::Type::DoubleTyID, llvm::Type::FloatTyID, llvm::Type::FP128TyID, llvm::APFloat::getSemantics(), llvm::Type::getTypeID(), llvm::APFloat::IEEEdouble, llvm::APFloat::IEEEquad, llvm::APFloat::IEEEsingle, llvm::Type::PPC_FP128TyID, llvm::APFloat::PPCDoubleDouble, llvm::APFloat::rmNearestTiesToEven, llvm::Type::X86_FP80TyID, and llvm::APFloat::x87DoubleExtended.

const APFloat& llvm::ConstantFP::getValueAPF

(

)

const [inline]

Definition at line 248 of file Constants.h.

Referenced by ExpandConstantFP(), llvm::FastISel::FastEmit_rf_(), FitsInFPType(), getNegativeZero(), isFPCSafeToPrint(), llvm::MachineOperand::print(), and useSIToFPInst().

bool ConstantFP::isNullValue

(

)

const [virtual]

isNullValue - Return true if this is the value that would be returned by getNullValue. Don't depend on == for doubles to tell us it's zero, it considers -0.0 to be null as well as 0.0. :(

Implements llvm::Constant.

Definition at line 299 of file Constants.cpp.

References llvm::APFloat::isNegative(), and llvm::APFloat::isZero().

ConstantFP * ConstantFP::getNegativeZero

(

const Type *

Ty

)

[static]

Definition at line 303 of file Constants.cpp.

References llvm::APFloat::changeSign(), get(), llvm::Constant::getNullValue(), and getValueAPF().

Referenced by llvm::ConstantExpr::getZeroValueForNegationExpr().

bool ConstantFP::isExactlyValue

(

const APFloat &

V

)

const

isExactlyValue - We don't rely on operator== working on double values, as it returns true for things that are clearly not equal, like -0.0 and 0.0. As such, this method can be used to do an exact bit-for-bit comparison of two floating point values. The version with a double operand is retained because it's so convenient to write isExactlyValue(2.0), but please use it only for simple constants.

Definition at line 309 of file Constants.cpp.

References llvm::APFloat::bitwiseIsEqual().

Referenced by isExactlyValue().

bool llvm::ConstantFP::isExactlyValue

(

double

V

)

const [inline]

Definition at line 266 of file Constants.h.

References llvm::APFloat::convert(), llvm::APFloat::getSemantics(), isExactlyValue(), llvm::APFloat::PPCDoubleDouble, and llvm::APFloat::rmNearestTiesToEven.

static bool llvm::ConstantFP::classof

(

const ConstantFP *

)

[inline, static]

Methods for support type inquiry through isa, cast, and dyn_cast:.

Definition at line 276 of file Constants.h.

static bool llvm::ConstantFP::classof

(

const Value *

V

)

[inline, static]

Reimplemented from llvm::Constant.

Definition at line 277 of file Constants.h.

References llvm::Value::ConstantFPVal, and llvm::Value::getValueID().

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

• Constants.h
• Constants.cpp