LLVM: llvm::SplitAnalysis Class Reference (original) (raw)

SplitAnalysis - Analyze a LiveInterval, looking for live range splitting opportunities. More...

#include "[CodeGen/SplitKit.h](SplitKit%5F8h%5Fsource.html)"

Classes
struct	BlockInfo
	Additional information about basic blocks where the current variable is live. More...

Public Member Functions
	SplitAnalysis (const VirtRegMap &vrm, const LiveIntervals &lis, const MachineLoopInfo &mli)
void	analyze (const LiveInterval *li)
	analyze - set CurLI to the specified interval, and analyze how it may be split.
void	clear ()
	clear - clear all data structures so SplitAnalysis is ready to analyze a new interval.
const LiveInterval &	getParent () const
	getParent - Return the last analyzed interval.
bool	isOriginalEndpoint (SlotIndex Idx) const
	isOriginalEndpoint - Return true if the original live range was killed or (re-)defined at Idx.
ArrayRef< SlotIndex >	getUseSlots () const
	getUseSlots - Return an array of SlotIndexes of instructions using CurLI.
ArrayRef< BlockInfo >	getUseBlocks () const
	getUseBlocks - Return an array of BlockInfo objects for the basic blocks where CurLI has uses.
unsigned	getNumThroughBlocks () const
	getNumThroughBlocks - Return the number of through blocks.
bool	isThroughBlock (unsigned MBB) const
	isThroughBlock - Return true if CurLI is live through MBB without uses.
const BitVector &	getThroughBlocks () const
	getThroughBlocks - Return the set of through blocks.
unsigned	getNumLiveBlocks () const
	getNumLiveBlocks - Return the number of blocks where CurLI is live.
bool	looksLikeLoopIV () const
unsigned	countLiveBlocks (const LiveInterval *li) const
	countLiveBlocks - Return the number of blocks where li is live.
bool	shouldSplitSingleBlock (const BlockInfo &BI, bool SingleInstrs) const
	shouldSplitSingleBlock - Returns true if it would help to create a local live range for the instructions in BI.
SlotIndex	getLastSplitPoint (unsigned Num)
SlotIndex	getLastSplitPoint (MachineBasicBlock *BB)
MachineBasicBlock::iterator	getLastSplitPointIter (MachineBasicBlock *BB)
SlotIndex	getFirstSplitPoint (unsigned Num)

Public Attributes
const MachineFunction &	MF
const VirtRegMap &	VRM
const LiveIntervals &	LIS
const MachineLoopInfo &	Loops
const TargetInstrInfo &	TII

SplitAnalysis - Analyze a LiveInterval, looking for live range splitting opportunities.

Definition at line 96 of file SplitKit.h.

◆ BlockPtrSet

◆ analyze()

analyze - set CurLI to the specified interval, and analyze how it may be split.

Definition at line 347 of file SplitKit.cpp.

References clear().

◆ clear()

void SplitAnalysis::clear	(	)

◆ countLiveBlocks()

◆ getFirstSplitPoint()

◆ getLastSplitPoint() [1/2]

◆ getLastSplitPoint() [2/2]

◆ getLastSplitPointIter()

◆ getNumLiveBlocks()

unsigned llvm::SplitAnalysis::getNumLiveBlocks ( ) const	inline

◆ getNumThroughBlocks()

unsigned llvm::SplitAnalysis::getNumThroughBlocks ( ) const	inline

◆ getParent()

getParent - Return the last analyzed interval.

Definition at line 185 of file SplitKit.h.

◆ getThroughBlocks()

const BitVector & llvm::SplitAnalysis::getThroughBlocks ( ) const	inline

getThroughBlocks - Return the set of through blocks.

Definition at line 209 of file SplitKit.h.

◆ getUseBlocks()

◆ getUseSlots()

getUseSlots - Return an array of SlotIndexes of instructions using CurLI.

This include both use and def operands, at most one entry per instruction.

Definition at line 196 of file SplitKit.h.

◆ isOriginalEndpoint()

◆ isThroughBlock()

bool llvm::SplitAnalysis::isThroughBlock ( unsigned MBB) const	inline

isThroughBlock - Return true if CurLI is live through MBB without uses.

Definition at line 206 of file SplitKit.h.

References MBB.

◆ looksLikeLoopIV()

bool llvm::SplitAnalysis::looksLikeLoopIV ( ) const	inline