Integer representation type. More...

#include <DerivedTypes.h>

Inheritance diagram for llvm::IntegerType:

Collaboration diagram for llvm::IntegerType:

Public Types
enum	{ MIN_INT_BITS = 1, MAX_INT_BITS = (1<<23)-1 }
	This enum is just used to hold constants we need for IntegerType. More...
Public Member Functions
unsigned	getBitWidth () const
	Get the number of bits in this IntegerType.
uint64_t	getBitMask () const
uint64_t	getSignBit () const
APInt	getMask () const
	Get a bit mask for this type.
bool	isPowerOf2ByteWidth () const
	Is this a power-of-2 byte-width IntegerType ?
Static Public Member Functions
static IntegerType *	get (LLVMContext &C, unsigned NumBits)
	Get or create an IntegerType instance.
static bool	classof (const Type *T)
	Methods for support type inquiry through isa, cast, and dyn_cast.
Protected Member Functions
	IntegerType (LLVMContext &C, unsigned NumBits)
Friends
class	LLVMContextImpl

Detailed Description

Integer representation type.

Class to represent integer types. Note that this class is also used to represent the built-in integer types: Int1Ty, Int8Ty, Int16Ty, Int32Ty and Int64Ty.

Definition at line 37 of file DerivedTypes.h.

Member Enumeration Documentation

anonymous enum

This enum is just used to hold constants we need for IntegerType.

Enumerator:

MIN_INT_BITS	Minimum number of bits that can be specified.
MAX_INT_BITS	Maximum number of bits that can be specified Note that bit width is stored in the Type classes SubclassData field which has 23 bits. This yields a maximum bit width of 8,388,607 bits.

Definition at line 46 of file DerivedTypes.h.

Constructor & Destructor Documentation

llvm::IntegerType::IntegerType	(	LLVMContext &	C,
		unsigned	NumBits
	)		`[inline, explicit, protected]`

Definition at line 41 of file DerivedTypes.h.

References llvm::Type::setSubclassData().

Referenced by get().

Member Function Documentation

static bool llvm::IntegerType::classof ( const Type * T ) [inline, static]

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

Definition at line 88 of file DerivedTypes.h.

References llvm::Type::getTypeID(), and llvm::Type::IntegerTyID.

IntegerType * IntegerType::get	(	LLVMContext &	C,
		unsigned	NumBits
	)		`[static]`

Get or create an IntegerType instance.

This static method is the primary way of constructing an IntegerType. If an IntegerType with the same NumBits value was previously instantiated, that instance will be returned. Otherwise a new one will be created. Only one instance with a given NumBits value is ever created.

Definition at line 303 of file Type.cpp.

References llvm::Type::getInt16Ty(), llvm::Type::getInt1Ty(), llvm::Type::getInt32Ty(), llvm::Type::getInt64Ty(), llvm::Type::getInt8Ty(), IntegerType(), llvm::LLVMContextImpl::IntegerTypes, MAX_INT_BITS, MIN_INT_BITS, llvm::LLVMContext::pImpl, and llvm::LLVMContextImpl::TypeAllocator.

Referenced by BinomialCoefficient(), BitCastConstantVector(), llvm::bypassSlowDivision(), CanShareConstantPoolEntry(), CoerceAvailableValueToLoadType(), CollectInsertionElements(), llvm::ConstantFoldBinaryInstruction(), llvm::ConstantFoldCastInstruction(), llvm::ConstantFoldCompareInstruction(), llvm::ConstantFoldInsertElementInstruction(), llvm::ConstantFoldSelectInstruction(), llvm::ConstantFoldShuffleVectorInstruction(), llvm::MDBuilder::createRange(), DecodeFixedType(), ExtractConstantBytes(), llvm::FastISel::fastEmit_ri_(), FoldBitCast(), llvm::TypeBuilder< types::i< num_bits >, cross >::get(), getAccessType(), llvm::VectorType::getDoubleElementsVectorType(), llvm::VectorType::getExtendedElementVectorType(), getFoldedAlignOf(), getFoldedSizeOf(), llvm::VectorType::getHalfElementsVectorType(), llvm::VectorType::getInteger(), llvm::Type::getIntNTy(), llvm::DataLayout::getIntPtrType(), GetLoadValueForLoad(), GetMemInstValueForLoad(), getPreStartForSignExtend(), llvm::ScalarEvolution::getSignExtendExpr(), GetStoreValueForLoad(), llvm::VectorType::getTruncatedElementVectorType(), llvm::EVT::getTypeForEVT(), llvm::ScalarEvolution::getUDivExpr(), llvm::PointerType::getUnqual(), llvm::ScalarEvolution::getZeroExtendExpr(), isAddRecSExtable(), isAddSExtable(), isMulSExtable(), LLVMIntTypeInContext(), llvm::TargetLowering::ParseConstraints(), ProcessUGT_ADDCST_ADD(), stripAndComputeConstantOffsets(), and llvm::InstCombiner::visitICmpInstWithInstAndIntCst().

uint64_t llvm::IntegerType::getBitMask ( ) const [inline]

getBitMask - Return a bitmask with ones set for all of the bits that can be set by an unsigned version of this type. This is 0xFF for i8, 0xFFFF for i16, etc.

Definition at line 66 of file DerivedTypes.h.

References getBitWidth().

Referenced by insertFastDiv().

unsigned llvm::IntegerType::getBitWidth ( ) const [inline]