llvm::sroa::AllocaSlices Class Reference

Representation of the alloca slices. More...

Public Member Functions
	AllocaSlices (const DataLayout &DL, AllocaInst &AI)
	Construct the slices of a particular alloca.
bool	isEscaped () const
	Test whether a pointer to the allocation escapes our analysis.
void	erase (iterator Start, iterator Stop)
	Erase a range of slices.
void	insert (ArrayRef< Slice > NewSlices)
	Insert new slices for this alloca.
iterator_range< partition_iterator >	partitions ()
ArrayRef< Instruction * >	getDeadUsers () const
	Access the dead users for this alloca.
ArrayRef< Use * >	getDeadUsesIfPromotable () const
	Access Uses that should be dropped if the alloca is promotable.
ArrayRef< Use * >	getDeadOperands () const
	Access the dead operands referring to this alloca.
void	print (raw_ostream &OS, const_iterator I, StringRef Indent=" ") const
void	printSlice (raw_ostream &OS, const_iterator I, StringRef Indent=" ") const
void	printUse (raw_ostream &OS, const_iterator I, StringRef Indent=" ") const
void	print (raw_ostream &OS) const
void	dump (const_iterator I) const
void	dump () const

Friends
class	AllocaSlices::SliceBuilder
using	iterator = SmallVectorImpl< Slice >::iterator
	Support for iterating over the slices.
using	range = iterator_range< iterator >
using	const_iterator = SmallVectorImpl< Slice >::const_iterator
using	const_range = iterator_range< const_iterator >
iterator	begin ()
iterator	end ()
const_iterator	begin () const
const_iterator	end () const

Detailed Description

Representation of the alloca slices.

This class represents the slices of an alloca which are formed by its various uses. If a pointer escapes, we can't fully build a representation for the slices used and we reflect that in this structure. The uses are stored, sorted by increasing beginning offset and with unsplittable slices starting at a particular offset before splittable slices.

Definition at line 434 of file SROA.cpp.

Member Typedef Documentation

const_iterator

using llvm::sroa::AllocaSlices::const_iterator = SmallVectorImpl<Slice>::const_iterator

Definition at line 453 of file SROA.cpp.

const_range

using llvm::sroa::AllocaSlices::const_range = iterator_range<const_iterator>

Definition at line 454 of file SROA.cpp.

iterator

using llvm::sroa::AllocaSlices::iterator = SmallVectorImpl<Slice>::iterator

Support for iterating over the slices.

Definition at line 447 of file SROA.cpp.

range

using llvm::sroa::AllocaSlices::range = iterator_range<iterator>

Definition at line 448 of file SROA.cpp.

Constructor & Destructor Documentation

AllocaSlices()

llvm::sroa::AllocaSlices::AllocaSlices	(	const DataLayout &	DL,
		AllocaInst &	AI
	)

Construct the slices of a particular alloca.

Member Function Documentation

begin() [1/2]

iterator llvm::sroa::AllocaSlices::begin ( )

inline

Definition at line 450 of file SROA.cpp.

References llvm::SmallVectorTemplateCommon< T, typename >::begin().

begin() [2/2]

const_iterator llvm::sroa::AllocaSlices::begin ( ) const

inline

Definition at line 456 of file SROA.cpp.

References llvm::SmallVectorTemplateCommon< T, typename >::begin().

dump() [1/2]

void llvm::sroa::AllocaSlices::dump

(

)

const

dump() [2/2]

void llvm::sroa::AllocaSlices::dump

(

const_iterator

I

)

const

end() [1/2]

iterator llvm::sroa::AllocaSlices::end ( )

inline

Definition at line 451 of file SROA.cpp.

References llvm::SmallVectorTemplateCommon< T, typename >::end().

end() [2/2]

const_iterator llvm::sroa::AllocaSlices::end ( ) const

inline

Definition at line 457 of file SROA.cpp.

References llvm::SmallVectorTemplateCommon< T, typename >::end().

erase()

void llvm::sroa::AllocaSlices::erase ( iterator  Start, iterator  Stop  )

inline

Erase a range of slices.

Definition at line 461 of file SROA.cpp.

References llvm::SmallVectorImpl< T >::erase().

getDeadOperands()

ArrayRef< Use * > llvm::sroa::AllocaSlices::getDeadOperands ( ) const

inline

Access the dead operands referring to this alloca.

These are operands which have cannot actually be used to refer to the alloca as they are outside its range and the user doesn't correct for that. These mostly consist of PHI node inputs and the like which we just need to replace with undef.

Definition at line 495 of file SROA.cpp.

getDeadUsers()

ArrayRef< Instruction * > llvm::sroa::AllocaSlices::getDeadUsers ( ) const

inline

Access the dead users for this alloca.

Definition at line 482 of file SROA.cpp.

getDeadUsesIfPromotable()

ArrayRef< Use * > llvm::sroa::AllocaSlices::getDeadUsesIfPromotable ( ) const

inline

Access Uses that should be dropped if the alloca is promotable.

Definition at line 485 of file SROA.cpp.

insert()

void llvm::sroa::AllocaSlices::insert ( ArrayRef< Slice >  NewSlices )

inline

Insert new slices for this alloca.

This moves the slices into the alloca's slices collection, and re-sorts everything so that the usual ordering properties of the alloca's slices hold.

Definition at line 468 of file SROA.cpp.

References llvm::SmallVectorImpl< T >::append(), llvm::SmallVectorTemplateCommon< T, typename >::begin(), llvm::ArrayRef< T >::begin(), llvm::SmallVectorTemplateCommon< T, typename >::end(), llvm::ArrayRef< T >::end(), llvm::SmallVectorBase< Size_T >::size(), and llvm::sort().

isEscaped()

bool llvm::sroa::AllocaSlices::isEscaped ( ) const

inline

Test whether a pointer to the allocation escapes our analysis.

If this is true, the slices are never fully built and should be ignored.

Definition at line 443 of file SROA.cpp.

partitions()

iterator_range< partition_iterator > llvm::sroa::AllocaSlices::partitions

(

)

print() [1/2]

void llvm::sroa::AllocaSlices::print

(

raw_ostream &

OS

)

const

print() [2/2]

void llvm::sroa::AllocaSlices::print	(	raw_ostream &	OS,
		const_iterator	I,
		StringRef	Indent = "  "
	)		const

printSlice()

void llvm::sroa::AllocaSlices::printSlice	(	raw_ostream &	OS,
		const_iterator	I,
		StringRef	Indent = "  "
	)		const

Referenced by llvm::sroa::AllocaSliceRewriter::visit().

printUse()

void llvm::sroa::AllocaSlices::printUse	(	raw_ostream &	OS,
		const_iterator	I,
		StringRef	Indent = "  "
	)		const

Friends And Related Function Documentation

AllocaSlices::SliceBuilder

friend class AllocaSlices::SliceBuilder

friend

Definition at line 512 of file SROA.cpp.

---

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

• lib/Transforms/Scalar/SROA.cpp