This is a 'bitvector' (really, a variable-sized bit array), optimized for the case when the array is small. More...

#include "llvm/ADT/SmallBitVector.h"

Classes
class	reference

Public Types
using	size_type = unsigned

using	const_set_bits_iterator = const_set_bits_iterator_impl< SmallBitVector >

using	set_iterator = const_set_bits_iterator

Public Member Functions
	SmallBitVector ()=default
	Creates an empty bitvector. More...

	SmallBitVector (unsigned s, bool t=false)
	Creates a bitvector of specified number of bits. More...

	SmallBitVector (const SmallBitVector &RHS)
	SmallBitVector copy ctor. More...

	SmallBitVector (SmallBitVector &&RHS)

	~SmallBitVector ()

const_set_bits_iterator	set_bits_begin () const

const_set_bits_iterator	set_bits_end () const

iterator_range< const_set_bits_iterator >	set_bits () const

bool	isSmall () const

bool	empty () const
	Tests whether there are no bits in this bitvector. More...

size_t	size () const
	Returns the number of bits in this bitvector. More...

size_type	count () const
	Returns the number of bits which are set. More...

bool	any () const
	Returns true if any bit is set. More...

bool	all () const
	Returns true if all bits are set. More...

bool	none () const
	Returns true if none of the bits are set. More...

int	find_first () const
	Returns the index of the first set bit, -1 if none of the bits are set. More...

int	find_last () const

int	find_first_unset () const
	Returns the index of the first unset bit, -1 if all of the bits are set. More...

int	find_last_unset () const

int	find_next (unsigned Prev) const
	Returns the index of the next set bit following the "Prev" bit. More...

int	find_next_unset (unsigned Prev) const
	Returns the index of the next unset bit following the "Prev" bit. More...

int	find_prev (unsigned PriorTo) const
	find_prev - Returns the index of the first set bit that precedes the the bit at `PriorTo`. More...

void	clear ()
	Clear all bits. More...

void	resize (unsigned N, bool t=false)
	Grow or shrink the bitvector. More...

void	reserve (unsigned N)

SmallBitVector &	set ()

SmallBitVector &	set (unsigned Idx)

SmallBitVector &	set (unsigned I, unsigned E)
	Efficiently set a range of bits in [I, E) More...

SmallBitVector &	reset ()

SmallBitVector &	reset (unsigned Idx)

SmallBitVector &	reset (unsigned I, unsigned E)
	Efficiently reset a range of bits in [I, E) More...

SmallBitVector &	flip ()

SmallBitVector &	flip (unsigned Idx)

SmallBitVector	operator~ () const

reference	operator[] (unsigned Idx)

bool	operator[] (unsigned Idx) const

bool	test (unsigned Idx) const

void	push_back (bool Val)

bool	anyCommon (const SmallBitVector &RHS) const
	Test if any common bits are set. More...

bool	operator== (const SmallBitVector &RHS) const

bool	operator!= (const SmallBitVector &RHS) const

SmallBitVector &	operator &= (const SmallBitVector &RHS)

SmallBitVector &	reset (const SmallBitVector &RHS)
	Reset bits that are set in RHS. Same as *this &= ~RHS. More...

bool	test (const SmallBitVector &RHS) const
	Check if (This - RHS) is zero. This is the same as reset(RHS) and any(). More...

SmallBitVector &	operator\|= (const SmallBitVector &RHS)

SmallBitVector &	operator^= (const SmallBitVector &RHS)

SmallBitVector &	operator<<= (unsigned N)

SmallBitVector &	operator>>= (unsigned N)

const SmallBitVector &	operator= (const SmallBitVector &RHS)

const SmallBitVector &	operator= (SmallBitVector &&RHS)

void	swap (SmallBitVector &RHS)

void	setBitsInMask (const uint32_t *Mask, unsigned MaskWords=~0u)
	Add '1' bits from Mask to this vector. More...

void	clearBitsInMask (const uint32_t *Mask, unsigned MaskWords=~0u)
	Clear any bits in this vector that are set in Mask. More...

void	setBitsNotInMask (const uint32_t *Mask, unsigned MaskWords=~0u)
	Add a bit to this vector for every '0' bit in Mask. More...

void	clearBitsNotInMask (const uint32_t *Mask, unsigned MaskWords=~0u)
	Clear a bit in this vector for every '0' bit in Mask. More...

Detailed Description

This is a 'bitvector' (really, a variable-sized bit array), optimized for the case when the array is small.

It contains one pointer-sized field, which is directly used as a plain collection of bits when possible, or as a pointer to a larger heap-allocated array when necessary. This allows normal "small" cases to be fast without losing generality for large inputs.

Definition at line 35 of file SmallBitVector.h.

Member Typedef Documentation

◆ const_set_bits_iterator

using llvm::SmallBitVector::const_set_bits_iterator = const_set_bits_iterator_impl<SmallBitVector>

Definition at line 170 of file SmallBitVector.h.

◆ set_iterator

using llvm::SmallBitVector::set_iterator = const_set_bits_iterator

Definition at line 171 of file SmallBitVector.h.

◆ size_type

using llvm::SmallBitVector::size_type = unsigned

Definition at line 64 of file SmallBitVector.h.

Constructor & Destructor Documentation

◆ SmallBitVector() [1/4]

llvm::SmallBitVector::SmallBitVector ( )

default

Creates an empty bitvector.

Referenced by llvm::SmallBitVector::reference::operator bool(), and operator~().

◆ SmallBitVector() [2/4]

llvm::SmallBitVector::SmallBitVector	(	unsigned	s,
		bool	t = `false`
	)

inlineexplicit

Creates a bitvector of specified number of bits.

All bits are initialized to the specified value.

Definition at line 146 of file SmallBitVector.h.

◆ SmallBitVector() [3/4]

llvm::SmallBitVector::SmallBitVector ( const SmallBitVector & RHS )

inline

SmallBitVector copy ctor.

Definition at line 154 of file SmallBitVector.h.

References isSmall().

◆ SmallBitVector() [4/4]

llvm::SmallBitVector::SmallBitVector ( SmallBitVector && RHS )

inline

Definition at line 161 of file SmallBitVector.h.

◆ ~SmallBitVector()

llvm::SmallBitVector::~SmallBitVector ( )

inline

Definition at line 165 of file SmallBitVector.h.

References isSmall().

Member Function Documentation

◆ all()

bool llvm::SmallBitVector::all ( ) const

inline

Returns true if all bits are set.

Definition at line 214 of file SmallBitVector.h.

References isSmall().

◆ any()

bool llvm::SmallBitVector::any ( ) const

inline

Returns true if any bit is set.

Definition at line 207 of file SmallBitVector.h.

References isSmall().

Referenced by llvm::DependenceInfo::depends(), and llvm::DependenceInfo::getSplitIteration().

◆ anyCommon()

bool llvm::SmallBitVector::anyCommon ( const SmallBitVector & RHS ) const

inline

Test if any common bits are set.

Definition at line 474 of file SmallBitVector.h.

References isSmall(), size(), and test().

◆ clear()

void llvm::SmallBitVector::clear ( )

inline

Clear all bits.

Definition at line 323 of file SmallBitVector.h.

References isSmall().

Referenced by llvm::StatepointLoweringState::clear(), operator=(), and llvm::StatepointLoweringState::startNewStatepoint().

◆ clearBitsInMask()

void llvm::SmallBitVector::clearBitsInMask	(	const uint32_t *	Mask,
		unsigned	MaskWords = `~0u`
	)

inline

Clear any bits in this vector that are set in Mask.

Don't resize. This computes "*this &= ~Mask".

Definition at line 641 of file SmallBitVector.h.

References isSmall(), and llvm::BitmaskEnumDetail::Mask().

◆ clearBitsNotInMask()

void llvm::SmallBitVector::clearBitsNotInMask	(	const uint32_t *	Mask,
		unsigned	MaskWords = `~0u`
	)

inline

Clear a bit in this vector for every '0' bit in Mask.

Don't resize. This computes "*this &= Mask".

Definition at line 659 of file SmallBitVector.h.

References assert(), isSmall(), and llvm::BitmaskEnumDetail::Mask().

◆ count()

size_type llvm::SmallBitVector::count ( ) const

inline

Returns the number of bits which are set.

Definition at line 198 of file SmallBitVector.h.

References llvm::tgtok::Bits, llvm::countPopulation(), and isSmall().

Referenced by llvm::DependenceInfo::depends(), EltsFromConsecutiveLoads(), find_first_unset(), find_last_unset(), llvm::DependenceInfo::getSplitIteration(), lowerVectorShuffleAsSplitOrBlend(), and mayUsePostIncMode().

◆ empty()

bool llvm::SmallBitVector::empty ( ) const

inline

Tests whether there are no bits in this bitvector.

Definition at line 188 of file SmallBitVector.h.

References isSmall().

◆ find_first()

int llvm::SmallBitVector::find_first ( ) const

inline

Returns the index of the first set bit, -1 if none of the bits are set.

Definition at line 228 of file SmallBitVector.h.

References llvm::tgtok::Bits, llvm::countTrailingZeros(), and isSmall().

Referenced by EltsFromConsecutiveLoads().

◆ find_first_unset()

int llvm::SmallBitVector::find_first_unset ( ) const

inline

Returns the index of the first unset bit, -1 if all of the bits are set.

Definition at line 249 of file SmallBitVector.h.

References llvm::tgtok::Bits, count(), llvm::countTrailingOnes(), and isSmall().

◆ find_last()

int llvm::SmallBitVector::find_last ( ) const

inline

Definition at line 238 of file SmallBitVector.h.

References llvm::tgtok::Bits, llvm::countLeadingZeros(), and isSmall().

◆ find_last_unset()

int llvm::SmallBitVector::find_last_unset ( ) const

inline

Definition at line 260 of file SmallBitVector.h.

References llvm::tgtok::Bits, count(), llvm::countLeadingOnes(), and isSmall().

◆ find_next()

int llvm::SmallBitVector::find_next ( unsigned Prev ) const

inline

Returns the index of the next set bit following the "Prev" bit.

Returns -1 if the next set bit is not found.

Definition at line 275 of file SmallBitVector.h.

References llvm::tgtok::Bits, llvm::countTrailingZeros(), and isSmall().

Referenced by dumpSmallBitVector().

◆ find_next_unset()

int llvm::SmallBitVector::find_next_unset ( unsigned Prev ) const

inline

Returns the index of the next unset bit following the "Prev" bit.

Returns -1 if the next unset bit is not found.

Definition at line 289 of file SmallBitVector.h.

References llvm::tgtok::Bits, llvm::countTrailingOnes(), isSmall(), and llvm::BitmaskEnumDetail::Mask().

◆ find_prev()

int llvm::SmallBitVector::find_prev ( unsigned PriorTo ) const

inline

find_prev - Returns the index of the first set bit that precedes the the bit at PriorTo.

Returns -1 if all previous bits are unset.

Definition at line 306 of file SmallBitVector.h.

References llvm::tgtok::Bits, llvm::countLeadingZeros(), and isSmall().

◆ flip() [1/2]

SmallBitVector& llvm::SmallBitVector::flip ( )

inline

Definition at line 430 of file SmallBitVector.h.

References isSmall().

◆ flip() [2/2]

SmallBitVector& llvm::SmallBitVector::flip ( unsigned Idx )

inline

Definition at line 438 of file SmallBitVector.h.

References isSmall().

◆ isSmall()

bool llvm::SmallBitVector::isSmall ( ) const

inline

Definition at line 185 of file SmallBitVector.h.

Referenced by all(), any(), anyCommon(), clear(), clearBitsInMask(), clearBitsNotInMask(), count(), empty(), find_first(), find_first_unset(), find_last(), find_last_unset(), find_next(), find_next_unset(), find_prev(), flip(), none(), operator &=(), llvm::SmallBitVector::reference::operator bool(), operator<<=(), operator=(), operator==(), operator>>=(), operator[](), operator^=(), operator|=(), reserve(), reset(), resize(), set(), setBitsInMask(), setBitsNotInMask(), size(), SmallBitVector(), test(), and ~SmallBitVector().

◆ none()

bool llvm::SmallBitVector::none ( ) const

inline

Returns true if none of the bits are set.

Definition at line 221 of file SmallBitVector.h.

References isSmall().

◆ operator &=()

SmallBitVector& llvm::SmallBitVector::operator&= ( const SmallBitVector & RHS )

inline

Definition at line 509 of file SmallBitVector.h.

References isSmall(), llvm::max(), reset(), resize(), size(), and test().

◆ operator!=()

bool llvm::SmallBitVector::operator!= ( const SmallBitVector & RHS ) const

inline

Definition at line 503 of file SmallBitVector.h.

◆ operator<<=()

SmallBitVector& llvm::SmallBitVector::operator<<= ( unsigned N )

inline

Definition at line 584 of file SmallBitVector.h.

References isSmall(), and N.

◆ operator=() [1/2]

const SmallBitVector& llvm::SmallBitVector::operator= ( const SmallBitVector & RHS )

inline

Definition at line 601 of file SmallBitVector.h.

References isSmall().

◆ operator=() [2/2]

const SmallBitVector& llvm::SmallBitVector::operator= ( SmallBitVector && RHS )

inline

Definition at line 618 of file SmallBitVector.h.

References clear(), and swap().

◆ operator==()

bool llvm::SmallBitVector::operator== ( const SmallBitVector & RHS ) const

inline

Definition at line 487 of file SmallBitVector.h.

References isSmall(), and size().

◆ operator>>=()

SmallBitVector& llvm::SmallBitVector::operator>>= ( unsigned N )

inline

Definition at line 592 of file SmallBitVector.h.

References isSmall(), and N.

◆ operator[]() [1/2]

reference llvm::SmallBitVector::operator[] ( unsigned Idx )

inline

Definition at line 452 of file SmallBitVector.h.

References assert(), llvm::SmallBitVector::reference::reference(), and size().

◆ operator[]() [2/2]

bool llvm::SmallBitVector::operator[] ( unsigned Idx ) const

inline

Definition at line 457 of file SmallBitVector.h.

References assert(), isSmall(), and size().

◆ operator^=()

SmallBitVector& llvm::SmallBitVector::operator^= ( const SmallBitVector & RHS )

inline

Definition at line 571 of file SmallBitVector.h.

References isSmall(), llvm::max(), resize(), size(), and test().

◆ operator|=()

SmallBitVector& llvm::SmallBitVector::operator|= ( const SmallBitVector & RHS )

inline

Definition at line 558 of file SmallBitVector.h.

References isSmall(), llvm::max(), resize(), size(), and test().

◆ operator~()

SmallBitVector llvm::SmallBitVector::operator~ ( ) const

inline

Definition at line 447 of file SmallBitVector.h.

References SmallBitVector().

◆ push_back()

void llvm::SmallBitVector::push_back ( bool Val )

inline

Definition at line 469 of file SmallBitVector.h.

References resize(), and size().

◆ reserve()

void llvm::SmallBitVector::reserve ( unsigned N )

inline

Definition at line 346 of file SmallBitVector.h.

References isSmall(), llvm::BitVector::reserve(), and llvm::BitVector::set().

◆ reset() [1/4]

SmallBitVector& llvm::SmallBitVector::reset ( )

inline

Definition at line 399 of file SmallBitVector.h.

References isSmall().

Referenced by llvm::DependenceInfo::depends(), llvm::DependenceInfo::getSplitIteration(), getTypePartition(), operator &=(), llvm::SmallBitVector::reference::operator=(), and reset().

◆ reset() [2/4]

SmallBitVector& llvm::SmallBitVector::reset ( unsigned Idx )

inline

Definition at line 407 of file SmallBitVector.h.

References isSmall().

◆ reset() [3/4]

SmallBitVector& llvm::SmallBitVector::reset	(	unsigned	I,
		unsigned	E
	)

inline

Efficiently reset a range of bits in [I, E)

Definition at line 416 of file SmallBitVector.h.

References assert(), E, I, isSmall(), llvm::BitmaskEnumDetail::Mask(), and size().

◆ reset() [4/4]

SmallBitVector& llvm::SmallBitVector::reset ( const SmallBitVector & RHS )

inline

Reset bits that are set in RHS. Same as *this &= ~RHS.

Definition at line 526 of file SmallBitVector.h.

References isSmall(), reset(), size(), and test().

◆ resize()

void llvm::SmallBitVector::resize	(	unsigned	N,
		bool	t = `false`
	)

inline

Grow or shrink the bitvector.

Definition at line 330 of file SmallBitVector.h.

References isSmall().

Referenced by llvm::StatepointLoweringState::allocateStackSlot(), lowerVectorShuffleAsSplitOrBlend(), operator &=(), operator^=(), operator|=(), push_back(), and llvm::StatepointLoweringState::startNewStatepoint().

◆ set() [1/3]

SmallBitVector& llvm::SmallBitVector::set ( )

inline

Definition at line 364 of file SmallBitVector.h.

References isSmall(), and set().

Referenced by llvm::DwarfExpression::addMachineReg(), llvm::StatepointLoweringState::allocateStackSlot(), llvm::DependenceInfo::depends(), llvm::LegalizerInfo::getAction(), llvm::DependenceInfo::getSplitIteration(), llvm::MachineInstr::getTypeToPrint(), isLoadOrStore(), llvm::SmallBitVector::reference::operator=(), llvm::StatepointLoweringState::reserveStackSlot(), and set().

◆ set() [2/3]

SmallBitVector& llvm::SmallBitVector::set ( unsigned Idx )

inline

Definition at line 372 of file SmallBitVector.h.

References assert(), and isSmall().

◆ set() [3/3]

SmallBitVector& llvm::SmallBitVector::set	(	unsigned	I,
		unsigned	E
	)

inline

Efficiently set a range of bits in [I, E)

Definition at line 385 of file SmallBitVector.h.

References assert(), E, I, isSmall(), llvm::BitmaskEnumDetail::Mask(), and size().

◆ set_bits()

iterator_range<const_set_bits_iterator> llvm::SmallBitVector::set_bits ( ) const

inline

Definition at line 181 of file SmallBitVector.h.

References llvm::make_range(), set_bits_begin(), and set_bits_end().

Referenced by llvm::DependenceInfo::depends(), dumpSmallBitVector(), getConstantPart(), llvm::DependenceInfo::getSplitIteration(), and mayUsePostIncMode().

◆ set_bits_begin()

const_set_bits_iterator llvm::SmallBitVector::set_bits_begin ( ) const

inline

Definition at line 173 of file SmallBitVector.h.

Referenced by set_bits().

◆ set_bits_end()

const_set_bits_iterator llvm::SmallBitVector::set_bits_end ( ) const

inline

Definition at line 177 of file SmallBitVector.h.

Referenced by set_bits().

◆ setBitsInMask()

void llvm::SmallBitVector::setBitsInMask	(	const uint32_t *	Mask,
		unsigned	MaskWords = `~0u`
	)

inline

Add '1' bits from Mask to this vector.

Don't resize. This computes "*this |= Mask".

Definition at line 632 of file SmallBitVector.h.

References isSmall(), and llvm::BitmaskEnumDetail::Mask().

◆ setBitsNotInMask()

void llvm::SmallBitVector::setBitsNotInMask	(	const uint32_t *	Mask,
		unsigned	MaskWords = `~0u`
	)

inline

Add a bit to this vector for every '0' bit in Mask.

Don't resize. This computes "*this |= ~Mask".

Definition at line 650 of file SmallBitVector.h.

References isSmall(), and llvm::BitmaskEnumDetail::Mask().

◆ size()

size_t llvm::SmallBitVector::size ( ) const

inline

Returns the number of bits in this bitvector.

Definition at line 193 of file SmallBitVector.h.

References isSmall().

Referenced by llvm::StatepointLoweringState::allocateStackSlot(), anyCommon(), llvm::StatepointLoweringState::isStackSlotAllocated(), operator &=(), operator==(), operator[](), operator^=(), operator|=(), push_back(), llvm::StatepointLoweringState::reserveStackSlot(), reset(), set(), and test().

◆ swap()

void llvm::SmallBitVector::swap ( SmallBitVector & RHS )

inline

Definition at line 626 of file SmallBitVector.h.

References std::swap().

Referenced by operator=(), and std::swap().

◆ test() [1/2]

bool llvm::SmallBitVector::test ( unsigned Idx ) const

inline

Definition at line 464 of file SmallBitVector.h.

Referenced by llvm::DwarfExpression::addMachineReg(), llvm::StatepointLoweringState::allocateStackSlot(), anyCommon(), llvm::StatepointLoweringState::isStackSlotAllocated(), operator &=(), operator^=(), operator|=(), llvm::StatepointLoweringState::reserveStackSlot(), reset(), and test().

◆ test() [2/2]

bool llvm::SmallBitVector::test ( const SmallBitVector & RHS ) const

inline

Check if (This - RHS) is zero. This is the same as reset(RHS) and any().

Definition at line 540 of file SmallBitVector.h.

References isSmall(), size(), and test().

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

include/llvm/ADT/SmallBitVector.h

Classes

Public Types

Public Member Functions

Detailed Description

Member Typedef Documentation

◆ const_set_bits_iterator

◆ set_iterator

◆ size_type

Constructor & Destructor Documentation

◆ SmallBitVector() [1/4]

◆ SmallBitVector() [2/4]

◆ SmallBitVector() [3/4]

◆ SmallBitVector() [4/4]

◆ ~SmallBitVector()

Member Function Documentation

◆ all()

◆ any()

◆ anyCommon()

◆ clear()

◆ clearBitsInMask()

◆ clearBitsNotInMask()

◆ count()

◆ empty()

◆ find_first()

◆ find_first_unset()

◆ find_last()

◆ find_last_unset()

◆ find_next()

◆ find_next_unset()

◆ find_prev()

◆ flip() [1/2]

◆ flip() [2/2]

◆ isSmall()

◆ none()

◆ operator &=()

◆ operator!=()

◆ operator<<=()

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ operator==()

◆ operator>>=()

◆ operator[]() [1/2]

◆ operator[]() [2/2]

◆ operator^=()

◆ operator|=()

◆ operator~()

◆ push_back()

◆ reserve()

◆ reset() [1/4]

◆ reset() [2/4]

◆ reset() [3/4]

◆ reset() [4/4]

◆ resize()

◆ set() [1/3]

◆ set() [2/3]

◆ set() [3/3]

◆ set_bits()

◆ set_bits_begin()

◆ set_bits_end()

◆ setBitsInMask()

◆ setBitsNotInMask()

◆ size()

◆ swap()

◆ test() [1/2]

◆ test() [2/2]