llvm::CriticalAntiDepBreaker Class Reference

#include "CodeGen/CriticalAntiDepBreaker.h"

Inheritance diagram for llvm::CriticalAntiDepBreaker:

Public Member Functions
	CriticalAntiDepBreaker (MachineFunction &MFi, const RegisterClassInfo &RCI)
	~CriticalAntiDepBreaker () override
void	StartBlock (MachineBasicBlock *BB) override
	Initialize anti-dep breaking for a new basic block.
unsigned	BreakAntiDependencies (const std::vector< SUnit > &SUnits, MachineBasicBlock::iterator Begin, MachineBasicBlock::iterator End, unsigned InsertPosIndex, DbgValueVector &DbgValues) override
	Identifiy anti-dependencies along the critical path of the ScheduleDAG and break them by renaming registers.
void	Observe (MachineInstr &MI, unsigned Count, unsigned InsertPosIndex) override
	Update liveness information to account for the current instruction, which will not be scheduled.
void	FinishBlock () override
	Finish anti-dep breaking for a basic block.
Public Member Functions inherited from llvm::AntiDepBreaker
virtual	~AntiDepBreaker ()
virtual void	StartBlock (MachineBasicBlock *BB)=0
	Initialize anti-dep breaking for a new basic block.
virtual unsigned	BreakAntiDependencies (const std::vector< SUnit > &SUnits, MachineBasicBlock::iterator Begin, MachineBasicBlock::iterator End, unsigned InsertPosIndex, DbgValueVector &DbgValues)=0
	Identifiy anti-dependencies within a basic-block region and break them by renaming registers.
virtual void	Observe (MachineInstr &MI, unsigned Count, unsigned InsertPosIndex)=0
	Update liveness information to account for the current instruction, which will not be scheduled.
virtual void	FinishBlock ()=0
	Finish anti-dep breaking for a basic block.
void	UpdateDbgValue (MachineInstr &MI, unsigned OldReg, unsigned NewReg)
	Update DBG_VALUE or DBG_PHI if dependency breaker is updating other machine instruction to use NewReg.
void	UpdateDbgValues (const DbgValueVector &DbgValues, MachineInstr *ParentMI, unsigned OldReg, unsigned NewReg)
	Update all DBG_VALUE instructions that may be affected by the dependency breaker's update of ParentMI to use NewReg.

Additional Inherited Members
Public Types inherited from llvm::AntiDepBreaker
using	DbgValueVector = std::vector< std::pair< MachineInstr *, MachineInstr * > >

Detailed Description

Definition at line 36 of file CriticalAntiDepBreaker.h.

Constructor & Destructor Documentation

CriticalAntiDepBreaker()

CriticalAntiDepBreaker::CriticalAntiDepBreaker	(	MachineFunction &	MFi,
		const RegisterClassInfo &	RCI
	)

Definition at line 41 of file CriticalAntiDepBreaker.cpp.

~CriticalAntiDepBreaker()

CriticalAntiDepBreaker::~CriticalAntiDepBreaker ( )

overridedefault

Member Function Documentation

BreakAntiDependencies()

unsigned CriticalAntiDepBreaker::BreakAntiDependencies ( const std::vector< SUnit > &  SUnits, MachineBasicBlock::iterator  Begin, MachineBasicBlock::iterator  End, unsigned  InsertPosIndex, DbgValueVector &  DbgValues  )

overridevirtual

Identifiy anti-dependencies along the critical path of the ScheduleDAG and break them by renaming registers.

Implements llvm::AntiDepBreaker.

Definition at line 436 of file CriticalAntiDepBreaker.cpp.

References llvm::SDep::Anti, assert(), CriticalPathStep(), llvm::SDep::Data, llvm::dbgs(), End, llvm::SUnit::getInstr(), llvm::MachineOperand::getReg(), I, llvm::MachineRegisterInfo::isAllocatable(), llvm::MachineOperand::isDef(), llvm::TargetInstrInfo::isPredicated(), llvm::MachineOperand::isReg(), llvm::MachineOperand::isUse(), LLVM_DEBUG, MI, P, llvm::SUnit::Preds, llvm::printReg(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), Range, llvm::BitVector::test(), TRI, and llvm::AntiDepBreaker::UpdateDbgValues().

FinishBlock()

void CriticalAntiDepBreaker::FinishBlock ( )

overridevirtual

Finish anti-dep breaking for a basic block.

Implements llvm::AntiDepBreaker.

Definition at line 96 of file CriticalAntiDepBreaker.cpp.

References llvm::BitVector::reset().

Observe()

void CriticalAntiDepBreaker::Observe ( MachineInstr &  MI, unsigned  Count, unsigned  InsertPosIndex  )

overridevirtual

Update liveness information to account for the current instruction, which will not be scheduled.

Implements llvm::AntiDepBreaker.

Definition at line 101 of file CriticalAntiDepBreaker.cpp.

References assert(), llvm::MCRegisterInfo::getNumRegs(), and MI.

StartBlock()

void CriticalAntiDepBreaker::StartBlock ( MachineBasicBlock *  BB )

overridevirtual

Initialize anti-dep breaking for a new basic block.

Implements llvm::AntiDepBreaker.

Definition at line 50 of file CriticalAntiDepBreaker.cpp.

References llvm::MachineRegisterInfo::getCalleeSavedRegs(), llvm::MachineFunction::getFrameInfo(), llvm::MCRegisterInfo::getNumRegs(), llvm::MachineFrameInfo::getPristineRegs(), llvm::MachineFunction::getRegInfo(), I, llvm::MachineBasicBlock::isReturnBlock(), llvm::MCRegAliasIterator::isValid(), llvm::BitVector::reset(), llvm::MachineBasicBlock::size(), llvm::MachineBasicBlock::successors(), and llvm::BitVector::test().

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

• lib/CodeGen/CriticalAntiDepBreaker.h
• lib/CodeGen/CriticalAntiDepBreaker.cpp