SlotIndexes pass. More...

#include "llvm/CodeGen/SlotIndexes.h"

Public Types
using	MBBIndexIterator = SmallVectorImpl<IdxMBBPair>::const_iterator
	Iterator over the idx2MBBMap (sorted pairs of slot index of basic block begin and basic block)

Public Member Functions
	SlotIndexes (SlotIndexes &&)=default
	SlotIndexes (MachineFunction &MF)
LLVM_ABI	~SlotIndexes ()
void	reanalyze (MachineFunction &MF)
LLVM_ABI void	print (raw_ostream &OS) const
LLVM_ABI void	dump () const
	Dump the indexes.
LLVM_ABI void	repairIndexesInRange (MachineBasicBlock *MBB, MachineBasicBlock::iterator Begin, MachineBasicBlock::iterator End)
	Repair indexes after adding and removing instructions.
SlotIndex	getZeroIndex ()
	Returns the zero index for this analysis.
SlotIndex	getLastIndex ()
	Returns the base index of the last slot in this analysis.
bool	hasIndex (const MachineInstr &instr) const
	Returns true if the given machine instr is mapped to an index, otherwise returns false.
SlotIndex	getInstructionIndex (const MachineInstr &MI, bool IgnoreBundle=false) const
	Returns the base index for the given instruction.
MachineInstr *	getInstructionFromIndex (SlotIndex index) const
	Returns the instruction for the given index, or null if the given index has no instruction associated with it.
SlotIndex	getNextNonNullIndex (SlotIndex Index)
	Returns the next non-null index, if one exists.
SlotIndex	getIndexBefore (const MachineInstr &MI) const
	getIndexBefore - Returns the index of the last indexed instruction before MI, or the start index of its basic block.
SlotIndex	getIndexAfter (const MachineInstr &MI) const
	getIndexAfter - Returns the index of the first indexed instruction after MI, or the end index of its basic block.
const std::pair< SlotIndex, SlotIndex > &	getMBBRange (unsigned Num) const
	Return the (start,end) range of the given basic block number.
const std::pair< SlotIndex, SlotIndex > &	getMBBRange (const MachineBasicBlock *MBB) const
	Return the (start,end) range of the given basic block.
SlotIndex	getMBBStartIdx (unsigned Num) const
	Returns the first index in the given basic block number.
SlotIndex	getMBBStartIdx (const MachineBasicBlock *mbb) const
	Returns the first index in the given basic block.
SlotIndex	getMBBEndIdx (unsigned Num) const
	Returns the last index in the given basic block number.
SlotIndex	getMBBEndIdx (const MachineBasicBlock *mbb) const
	Returns the last index in the given basic block.
MBBIndexIterator	getMBBLowerBound (MBBIndexIterator Start, SlotIndex Idx) const
	Get an iterator pointing to the first IdxMBBPair with SlotIndex greater than or equal to `Idx`.
MBBIndexIterator	getMBBLowerBound (SlotIndex Idx) const
MBBIndexIterator	getMBBUpperBound (SlotIndex Idx) const
	Get an iterator pointing to the first IdxMBBPair with SlotIndex greater than `Idx`.
MBBIndexIterator	MBBIndexBegin () const
	Returns an iterator for the begin of the idx2MBBMap.
MBBIndexIterator	MBBIndexEnd () const
	Return an iterator for the end of the idx2MBBMap.
MachineBasicBlock *	getMBBFromIndex (SlotIndex index) const
	Returns the basic block which the given index falls in.
SlotIndex	insertMachineInstrInMaps (MachineInstr &MI, bool Late=false)
	Insert the given machine instruction into the mapping.
LLVM_ABI void	removeMachineInstrFromMaps (MachineInstr &MI, bool AllowBundled=false)
	Removes machine instruction (bundle) `MI` from the mapping.
LLVM_ABI void	removeSingleMachineInstrFromMaps (MachineInstr &MI)
	Removes a single machine instruction `MI` from the mapping.
SlotIndex	replaceMachineInstrInMaps (MachineInstr &MI, MachineInstr &NewMI)
	ReplaceMachineInstrInMaps - Replacing a machine instr with a new one in maps used by register allocator.
void	insertMBBInMaps (MachineBasicBlock *mbb)
	Add the given MachineBasicBlock into the maps.
LLVM_ABI void	packIndexes ()
	Renumber all indexes using the default instruction distance.

Friends
class	SlotIndexesWrapperPass

Detailed Description

SlotIndexes pass.

This pass assigns indexes to each instruction.

Definition at line 298 of file SlotIndexes.h.

Member Typedef Documentation

◆ MBBIndexIterator

using llvm::SlotIndexes::MBBIndexIterator = SmallVectorImpl<IdxMBBPair>::const_iterator

Iterator over the idx2MBBMap (sorted pairs of slot index of basic block begin and basic block)

Definition at line 482 of file SlotIndexes.h.

Constructor & Destructor Documentation

◆ SlotIndexes() [1/2]

llvm::SlotIndexes::SlotIndexes ( SlotIndexes && )

default

◆ SlotIndexes() [2/2]

llvm::SlotIndexes::SlotIndexes ( MachineFunction & MF )

inline

Definition at line 343 of file SlotIndexes.h.

◆ ~SlotIndexes()

SlotIndexes::~SlotIndexes ( )

Definition at line 42 of file SlotIndexes.cpp.

Member Function Documentation

◆ dump()

LLVM_DUMP_METHOD void SlotIndexes::dump ( ) const

Dump the indexes.

Definition at line 282 of file SlotIndexes.cpp.

References llvm::dbgs(), LLVM_DUMP_METHOD, and print().

◆ getIndexAfter()

SlotIndex llvm::SlotIndexes::getIndexAfter ( const MachineInstr & MI ) const

inline

getIndexAfter - Returns the index of the first indexed instruction after MI, or the end index of its basic block.

MI is not required to have an index.

Definition at line 434 of file SlotIndexes.h.

References assert(), E(), getMBBEndIdx(), I, MBB, and MI.

Referenced by insertMachineInstrInMaps().

◆ getIndexBefore()

SlotIndex llvm::SlotIndexes::getIndexBefore ( const MachineInstr & MI ) const

inline

getIndexBefore - Returns the index of the last indexed instruction before MI, or the start index of its basic block.

MI is not required to have an index.

Definition at line 417 of file SlotIndexes.h.

References assert(), B(), getMBBStartIdx(), I, MBB, and MI.

Referenced by insertMachineInstrInMaps().

◆ getInstructionFromIndex()

MachineInstr * llvm::SlotIndexes::getInstructionFromIndex ( SlotIndex index ) const

inline

Returns the instruction for the given index, or null if the given index has no instruction associated with it.

Definition at line 398 of file SlotIndexes.h.

References llvm::IndexListEntry::getInstr().

Referenced by getMBBFromIndex(), llvm::LiveRange::overlaps(), llvm::HexagonRegisterInfo::shouldCoalesce(), and stripValuesNotDefiningMask().

◆ getInstructionIndex()

SlotIndex llvm::SlotIndexes::getInstructionIndex	(	const MachineInstr &	MI,
		bool	IgnoreBundle = false ) const

inline

Returns the base index for the given instruction.

Definition at line 380 of file SlotIndexes.h.

References assert(), llvm::getBundleEnd(), llvm::getBundleStart(), llvm::MachineInstr::isDebugInstr(), MI, and llvm::skipDebugInstructionsForward().

Referenced by buildVRegToDbgValueMap(), llvm::LiveInterval::computeSubRangeUndefs(), createDeadDef(), llvm::SystemZInstrInfo::foldMemoryOperandImpl(), insertMBBInMaps(), llvm::MachineBasicBlock::print(), and repairIndexesInRange().

◆ getLastIndex()

SlotIndex llvm::SlotIndexes::getLastIndex ( )

inline

Returns the base index of the last slot in this analysis.

Definition at line 369 of file SlotIndexes.h.

Referenced by getNextNonNullIndex().

◆ getMBBEndIdx() [1/2]

SlotIndex llvm::SlotIndexes::getMBBEndIdx ( const MachineBasicBlock * mbb ) const

inline

Returns the last index in the given basic block.

Definition at line 476 of file SlotIndexes.h.

References getMBBRange().

◆ getMBBEndIdx() [2/2]

SlotIndex llvm::SlotIndexes::getMBBEndIdx ( unsigned Num ) const

inline

Returns the last index in the given basic block number.

Definition at line 471 of file SlotIndexes.h.

References getMBBRange().

Referenced by buildVRegToDbgValueMap(), getIndexAfter(), getMBBFromIndex(), insertMBBInMaps(), repairIndexesInRange(), and llvm::GCNRegPressurePrinter::runOnMachineFunction().

◆ getMBBFromIndex()

MachineBasicBlock * llvm::SlotIndexes::getMBBFromIndex ( SlotIndex index ) const

inline

Returns the basic block which the given index falls in.

Definition at line 516 of file SlotIndexes.h.

References assert(), getInstructionFromIndex(), getMBBEndIdx(), getMBBUpperBound(), I, MBBIndexEnd(), and MI.

◆ getMBBLowerBound() [1/2]

MBBIndexIterator llvm::SlotIndexes::getMBBLowerBound	(	MBBIndexIterator	Start,
		SlotIndex	Idx ) const

inline

Get an iterator pointing to the first IdxMBBPair with SlotIndex greater than or equal to Idx.

If Start is provided, only search the range from Start to the end of the function.

Definition at line 487 of file SlotIndexes.h.

References MBBIndexEnd().

Referenced by getMBBLowerBound().

◆ getMBBLowerBound() [2/2]

MBBIndexIterator llvm::SlotIndexes::getMBBLowerBound ( SlotIndex Idx ) const

inline

Definition at line 493 of file SlotIndexes.h.

References getMBBLowerBound(), and MBBIndexBegin().

◆ getMBBRange() [1/2]

const std::pair< SlotIndex, SlotIndex > & llvm::SlotIndexes::getMBBRange ( const MachineBasicBlock * MBB ) const

inline

Return the (start,end) range of the given basic block.

Definition at line 456 of file SlotIndexes.h.

References getMBBRange(), and MBB.

◆ getMBBRange() [2/2]

const std::pair< SlotIndex, SlotIndex > & llvm::SlotIndexes::getMBBRange ( unsigned Num ) const

inline

Return the (start,end) range of the given basic block number.

Definition at line 450 of file SlotIndexes.h.

Referenced by getMBBEndIdx(), getMBBEndIdx(), getMBBRange(), getMBBStartIdx(), and getMBBStartIdx().

◆ getMBBStartIdx() [1/2]

SlotIndex llvm::SlotIndexes::getMBBStartIdx ( const MachineBasicBlock * mbb ) const

inline

Returns the first index in the given basic block.

Definition at line 466 of file SlotIndexes.h.

References getMBBRange().

◆ getMBBStartIdx() [2/2]

SlotIndex llvm::SlotIndexes::getMBBStartIdx ( unsigned Num ) const

inline

Returns the first index in the given basic block number.

Definition at line 461 of file SlotIndexes.h.

References getMBBRange().

Referenced by buildVRegToDbgValueMap(), getIndexBefore(), llvm::MachineBasicBlock::print(), repairIndexesInRange(), llvm::GCNRegPressurePrinter::runOnMachineFunction(), and llvm::LiveDebugVariables::LDVImpl::runOnMachineFunction().

◆ getMBBUpperBound()

MBBIndexIterator llvm::SlotIndexes::getMBBUpperBound ( SlotIndex Idx ) const

inline

Get an iterator pointing to the first IdxMBBPair with SlotIndex greater than Idx.

Definition at line 499 of file SlotIndexes.h.

References MBBIndexBegin(), and MBBIndexEnd().

Referenced by getMBBFromIndex().

◆ getNextNonNullIndex()

SlotIndex llvm::SlotIndexes::getNextNonNullIndex ( SlotIndex Index )

inline

Returns the next non-null index, if one exists.

Otherwise returns getLastIndex().

Definition at line 404 of file SlotIndexes.h.

References E(), getLastIndex(), and I.

Referenced by llvm::LiveRange::isZeroLength().

◆ getZeroIndex()

SlotIndex llvm::SlotIndexes::getZeroIndex ( )

inline

Returns the zero index for this analysis.

Definition at line 363 of file SlotIndexes.h.

References assert().

◆ hasIndex()

bool llvm::SlotIndexes::hasIndex ( const MachineInstr & instr ) const

inline

Returns true if the given machine instr is mapped to an index, otherwise returns false.

Definition at line 375 of file SlotIndexes.h.

References instr.

Referenced by llvm::MachineBasicBlock::print().

◆ insertMachineInstrInMaps()

SlotIndex llvm::SlotIndexes::insertMachineInstrInMaps	(	MachineInstr &	MI,
		bool	Late = false )

inline

Insert the given machine instruction into the mapping.

Returns the assigned index. If Late is set and there are null indexes between mi's neighboring instructions, create the new index after the null indexes instead of before them.

Definition at line 532 of file SlotIndexes.h.

References assert(), getIndexAfter(), getIndexBefore(), llvm::ilist_node_impl< OptionsT >::getIterator(), and MI.

Referenced by insertCSRRestores(), insertCSRSaves(), llvm::SIInstrInfo::insertScratchExecCopy(), repairIndexesInRange(), llvm::SIInstrInfo::restoreExec(), llvm::SIRegisterInfo::restoreSGPR(), and llvm::SIRegisterInfo::spillSGPR().

◆ insertMBBInMaps()

void llvm::SlotIndexes::insertMBBInMaps ( MachineBasicBlock * mbb )

inline

Add the given MachineBasicBlock into the maps.

If it contains any instructions then they must already be in the maps. This is used after a block has been split by moving some suffix of its instructions into a newly created block.

Definition at line 607 of file SlotIndexes.h.

References assert(), llvm::MachineBasicBlock::empty(), llvm::MachineBasicBlock::front(), llvm::MachineFunction::front(), getInstructionIndex(), llvm::ilist_node_impl< OptionsT >::getIterator(), getMBBEndIdx(), llvm::MachineBasicBlock::getNumber(), llvm::MachineBasicBlock::getParent(), and llvm::sort().

Referenced by llvm::MachineBasicBlock::SplitCriticalEdge().

◆ MBBIndexBegin()

MBBIndexIterator llvm::SlotIndexes::MBBIndexBegin ( ) const

inline

Returns an iterator for the begin of the idx2MBBMap.

Definition at line 506 of file SlotIndexes.h.

Referenced by getMBBLowerBound(), and getMBBUpperBound().

◆ MBBIndexEnd()

MBBIndexIterator llvm::SlotIndexes::MBBIndexEnd ( ) const

inline

Return an iterator for the end of the idx2MBBMap.

Definition at line 511 of file SlotIndexes.h.

Referenced by getMBBFromIndex(), getMBBLowerBound(), and getMBBUpperBound().

◆ packIndexes()

void SlotIndexes::packIndexes ( )

Renumber all indexes using the default instruction distance.

Definition at line 261 of file SlotIndexes.cpp.

References llvm::enumerate(), and llvm::SlotIndex::InstrDist.

◆ print()

void SlotIndexes::print ( raw_ostream & OS ) const

Definition at line 266 of file SlotIndexes.cpp.

Referenced by dump().

◆ reanalyze()

void llvm::SlotIndexes::reanalyze ( MachineFunction & MF )

inline

Definition at line 347 of file SlotIndexes.h.

◆ removeMachineInstrFromMaps()

void SlotIndexes::removeMachineInstrFromMaps	(	MachineInstr &	MI,
		bool	AllowBundled = false )

Removes machine instruction (bundle) MI from the mapping.

This should be called before MachineInstr::eraseFromParent() is used to remove a whole bundle or an unbundled instruction. If AllowBundled is set then this can be used on a bundled instruction; however, this exists to support handleMoveIntoBundle, and in general removeSingleMachineInstrFromMaps should be used instead.

Definition at line 127 of file SlotIndexes.cpp.

References assert(), llvm::IndexListEntry::getInstr(), MI, and llvm::IndexListEntry::setInstr().

Referenced by repairIndexesInRange().

◆ removeSingleMachineInstrFromMaps()

void SlotIndexes::removeSingleMachineInstrFromMaps ( MachineInstr & MI )

Removes a single machine instruction MI from the mapping.

This should be called before MachineInstr::eraseFromBundle() is used to remove a single instruction (out of a bundle).

Definition at line 143 of file SlotIndexes.cpp.

References assert(), llvm::IndexListEntry::getInstr(), MI, llvm::Next, and llvm::IndexListEntry::setInstr().

◆ repairIndexesInRange()

void SlotIndexes::repairIndexesInRange	(	MachineBasicBlock *	MBB,
		MachineBasicBlock::iterator	Begin,
		MachineBasicBlock::iterator	End )

Repair indexes after adding and removing instructions.

Definition at line 191 of file SlotIndexes.cpp.

References assert(), getInstructionIndex(), llvm::ilist_node_impl< OptionsT >::getIterator(), getMBBEndIdx(), getMBBStartIdx(), llvm::MachineInstr::getParent(), insertMachineInstrInMaps(), llvm::MachineInstr::isDebugOrPseudoInstr(), MBB, MBBI, MI, and removeMachineInstrFromMaps().

Referenced by insertCSRRestores(), and insertCSRSaves().

◆ replaceMachineInstrInMaps()

SlotIndex llvm::SlotIndexes::replaceMachineInstrInMaps	(	MachineInstr &	MI,
		MachineInstr &	NewMI )

inline

ReplaceMachineInstrInMaps - Replacing a machine instr with a new one in maps used by register allocator.

Returns: the index where the new instruction was inserted.

Definition at line 589 of file SlotIndexes.h.

References assert(), llvm::IndexListEntry::getInstr(), MI, and llvm::IndexListEntry::setInstr().

Referenced by llvm::SIRegisterInfo::restoreSGPR(), and llvm::SIRegisterInfo::spillSGPR().

◆ SlotIndexesWrapperPass

friend class SlotIndexesWrapperPass

friend

Definition at line 299 of file SlotIndexes.h.

References LLVM_ABI, and SlotIndexesWrapperPass.

Referenced by SlotIndexesWrapperPass.

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

include/llvm/CodeGen/SlotIndexes.h
lib/CodeGen/SlotIndexes.cpp

Public Types

Public Member Functions

Friends

Detailed Description

Member Typedef Documentation

◆ MBBIndexIterator

Constructor & Destructor Documentation

◆ SlotIndexes() [1/2]

◆ SlotIndexes() [2/2]

◆ ~SlotIndexes()

Member Function Documentation

◆ dump()

◆ getIndexAfter()

◆ getIndexBefore()

◆ getInstructionFromIndex()

◆ getInstructionIndex()

◆ getLastIndex()

◆ getMBBEndIdx() [1/2]

◆ getMBBEndIdx() [2/2]

◆ getMBBFromIndex()

◆ getMBBLowerBound() [1/2]

◆ getMBBLowerBound() [2/2]

◆ getMBBRange() [1/2]

◆ getMBBRange() [2/2]

◆ getMBBStartIdx() [1/2]

◆ getMBBStartIdx() [2/2]

◆ getMBBUpperBound()

◆ getNextNonNullIndex()

◆ getZeroIndex()

◆ hasIndex()

◆ insertMachineInstrInMaps()

◆ insertMBBInMaps()

◆ MBBIndexBegin()

◆ MBBIndexEnd()

◆ packIndexes()

◆ print()

◆ reanalyze()

◆ removeMachineInstrFromMaps()

◆ removeSingleMachineInstrFromMaps()

◆ repairIndexesInRange()

◆ replaceMachineInstrInMaps()

Friends And Related Symbol Documentation

◆ SlotIndexesWrapperPass