llvm::LivenessInfo Class Reference

Class to track incremental liveness update. More...

#include "Target/Hexagon/HexagonGlobalRegion.h"

Public Member Functions
	LivenessInfo (const TargetInstrInfo *TII, const TargetRegisterInfo *TRI, MachineBasicBlock *MBB)
	~LivenessInfo ()
void	parseOperands (MachineInstr *MI, BitVector &Gen, BitVector &Kill, BitVector &Use)
	Determine def/use set for MI.
void	parseOperandsWithReset (MachineInstr *MI, BitVector &Gen, BitVector &Kill, BitVector &Use)
void	setUsed (BitVector &Set, unsigned Reg)
	setUsed - Set the register and its sub-registers as being used.
void	UpdateLiveness (MachineBasicBlock *MBB)
void	dump ()

Detailed Description

Class to track incremental liveness update.

Definition at line 29 of file HexagonGlobalRegion.h.

Constructor & Destructor Documentation

LivenessInfo()

LivenessInfo::LivenessInfo	(	const TargetInstrInfo *	TII,
		const TargetRegisterInfo *	TRI,
		MachineBasicBlock *	MBB )

Definition at line 22 of file HexagonGlobalRegion.cpp.

References for(), MBB, and setUsed().

~LivenessInfo()

llvm::LivenessInfo::~LivenessInfo ( )

inline

Definition at line 38 of file HexagonGlobalRegion.h.

Member Function Documentation

dump()

void LivenessInfo::dump

(

)

Definition at line 210 of file HexagonGlobalRegion.cpp.

References llvm::dbgs(), LLVM_DEBUG, and llvm::printReg().

parseOperands()

void LivenessInfo::parseOperands	(	MachineInstr *	MI,
		BitVector &	Gen,
		BitVector &	Kill,
		BitVector &	Use )

Determine def/use set for MI.

Beware, if def is conditional, like here: BUNDLE PC<imp-def>, R0<imp-def>, P0<imp-use,kill>, R16<imp-use>

• R0<def> = LDriuh_cdnNotPt P0<kill,internal>, R16, 0;
• P0<def> = C2_cmpeqi R16, 0; It is not a statefull definition of R0.

Definition at line 78 of file HexagonGlobalRegion.cpp.

References llvm::dbgs(), llvm::MachineOperand::getReg(), llvm::MachineOperand::isDead(), llvm::MachineOperand::isDef(), llvm::MachineOperand::isKill(), isPredicatedDef(), llvm::MachineOperand::isReg(), llvm::MachineOperand::isUse(), llvm::Kill, LLVM_DEBUG, MI, llvm::printReg(), and setUsed().

Referenced by parseOperandsWithReset().

parseOperandsWithReset()

void LivenessInfo::parseOperandsWithReset	(	MachineInstr *	MI,
		BitVector &	Gen,
		BitVector &	Kill,
		BitVector &	Use )

Definition at line 104 of file HexagonGlobalRegion.cpp.

References llvm::Kill, MI, parseOperands(), and llvm::BitVector::reset().

Referenced by UpdateLiveness().

setUsed()

void LivenessInfo::setUsed	(	BitVector &	Set,
		unsigned	Reg )

setUsed - Set the register and its sub-registers as being used.

Taken from RegScavenger::setUsed().

Definition at line 114 of file HexagonGlobalRegion.cpp.

References llvm::MCSubRegIterator::isValid().

Referenced by LivenessInfo(), parseOperands(), and UpdateLiveness().

UpdateLiveness()

void LivenessInfo::UpdateLiveness

(

MachineBasicBlock *

MBB

)

Definition at line 132 of file HexagonGlobalRegion.cpp.

References llvm::dbgs(), dumpRI(), LLVM_DEBUG, MBB, MI, parseOperandsWithReset(), llvm::printReg(), llvm::BitVector::reset(), setUsed(), and llvm::BitVector::test().

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

• lib/Target/Hexagon/HexagonGlobalRegion.h
• lib/Target/Hexagon/HexagonGlobalRegion.cpp