llvm::LiveRangeUpdater Class Reference

#include <LiveInterval.h>

List of all members.

Public Member Functions
	LiveRangeUpdater (LiveRange *lr=nullptr)
	~LiveRangeUpdater ()
void	add (LiveRange::Segment)
void	add (SlotIndex Start, SlotIndex End, VNInfo *VNI)
bool	isDirty () const
void	flush ()
void	setDest (LiveRange *lr)
	Select a different destination live range.
LiveRange *	getDest () const
	Get the current destination live range.
void	dump () const
void	print (raw_ostream &) const

---

Detailed Description

Helper class for performant LiveRange bulk updates.

Calling LiveRange::addSegment() repeatedly can be expensive on large live ranges because segments after the insertion point may need to be shifted. The LiveRangeUpdater class can defer the shifting when adding many segments in order.

The LiveRange will be in an invalid state until flush() is called.

Definition at line 589 of file LiveInterval.h.

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Constructor & Destructor Documentation

llvm::LiveRangeUpdater::LiveRangeUpdater

(

LiveRange *

lr = nullptr

)

[inline]

Create a LiveRangeUpdater for adding segments to LR. LR will temporarily be in an invalid state until flush() is called.

Definition at line 600 of file LiveInterval.h.

llvm::LiveRangeUpdater::~LiveRangeUpdater

(

)

[inline]

Definition at line 602 of file LiveInterval.h.

References flush().

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Member Function Documentation

void LiveRangeUpdater::add

(

LiveRange::Segment

Seg

)

Add a segment to LR and coalesce when possible, just like LR.addSegment(). Segments should be added in increasing start order for best performance.

Definition at line 723 of file LiveInterval.cpp.

References coalescable(), llvm::LiveRange::Segment::end, llvm::LiveRange::end(), llvm::LiveRange::Segment::start, and llvm::LiveRange::Segment::valno.

Referenced by add(), llvm::LiveRange::join(), llvm::LiveRange::MergeSegmentsInAsValue(), and llvm::LiveRange::MergeValueInAsValue().

void llvm::LiveRangeUpdater::add	(	SlotIndex	Start,
		SlotIndex	End,
		VNInfo *	VNI
	)		[inline]

Definition at line 609 of file LiveInterval.h.

References add().

void LiveRangeUpdater::dump

(

)

const

Definition at line 706 of file LiveInterval.cpp.

References llvm::errs(), and llvm::LiveRange::print().

void LiveRangeUpdater::flush

(

)

Flush the updater state to LR so it is valid and contains all added segments.

Definition at line 823 of file LiveInterval.cpp.

Referenced by setDest(), and ~LiveRangeUpdater().

LiveRange* llvm::LiveRangeUpdater::getDest

(

)

const [inline]

Get the current destination live range.

Definition at line 629 of file LiveInterval.h.

bool llvm::LiveRangeUpdater::isDirty

(

)

const [inline]

Return true if the LR is currently in an invalid state, and flush() needs to be called.

Definition at line 615 of file LiveInterval.h.

References llvm::SlotIndex::isValid().

Referenced by setDest().

void LiveRangeUpdater::print

(

raw_ostream &

OS

)

const

Definition at line 683 of file LiveInterval.cpp.

References I.

Referenced by llvm::operator<<().

void llvm::LiveRangeUpdater::setDest

(

LiveRange *

lr

)

[inline]

Select a different destination live range.

Definition at line 622 of file LiveInterval.h.

References flush(), and isDirty().

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

• LiveInterval.h
• LiveInterval.cpp