llvm::AggressiveAntiDepBreaker Class Reference

#include "CodeGen/AggressiveAntiDepBreaker.h"

Inheritance diagram for llvm::AggressiveAntiDepBreaker:

Public Member Functions
	AggressiveAntiDepBreaker (MachineFunction &MFi, const RegisterClassInfo &RCI, TargetSubtargetInfo::RegClassVector &CriticalPathRCs)
AggressiveAntiDepBreaker &	operator= (const AggressiveAntiDepBreaker &other)=delete
	AggressiveAntiDepBreaker (const AggressiveAntiDepBreaker &other)=delete
	~AggressiveAntiDepBreaker () 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 116 of file AggressiveAntiDepBreaker.h.

Constructor & Destructor Documentation

AggressiveAntiDepBreaker() [1/2]

AggressiveAntiDepBreaker::AggressiveAntiDepBreaker	(	MachineFunction &	MFi,
		const RegisterClassInfo &	RCI,
		TargetSubtargetInfo::RegClassVector &	CriticalPathRCs
	)

Definition at line 120 of file AggressiveAntiDepBreaker.cpp.

References llvm::dbgs(), llvm::TargetRegisterInfo::getAllocatableSet(), LLVM_DEBUG, llvm::BitVector::none(), llvm::printReg(), and llvm::BitVector::set_bits().

AggressiveAntiDepBreaker() [2/2]

llvm::AggressiveAntiDepBreaker::AggressiveAntiDepBreaker ( const AggressiveAntiDepBreaker &  other )

delete

~AggressiveAntiDepBreaker()

AggressiveAntiDepBreaker::~AggressiveAntiDepBreaker ( )

override

Definition at line 142 of file AggressiveAntiDepBreaker.cpp.

Member Function Documentation

BreakAntiDependencies()

unsigned AggressiveAntiDepBreaker::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.

BreakAntiDependencies - Identifiy anti-dependencies within the ScheduleDAG and break them by renaming registers.

Implements llvm::AntiDepBreaker.

Definition at line 729 of file AggressiveAntiDepBreaker.cpp.

References llvm::SDep::Anti, AntiDepEdges(), llvm::BitVector::any(), assert(), CriticalPathStep(), llvm::SDep::Data, llvm::dbgs(), llvm::Pass::dump(), End, llvm::AggressiveAntiDepState::GetDefIndices(), llvm::SUnit::getDepth(), llvm::AggressiveAntiDepState::GetGroup(), llvm::SUnit::getInstr(), llvm::AggressiveAntiDepState::GetKillIndices(), llvm::SDep::getKind(), llvm::MCRegisterInfo::getNumRegs(), llvm::SDep::getReg(), llvm::AggressiveAntiDepState::GetRegRefs(), llvm::SDep::getSUnit(), I, llvm::MachineRegisterInfo::isAllocatable(), llvm::MachineOperand::isImplicit(), llvm::AggressiveAntiDepState::IsLive(), llvm::SUnit::Latency, LLVM_DEBUG, llvm::make_range(), MI, llvm::SDep::Output, P, llvm::SUnit::Preds, llvm::printReg(), llvm::BitVector::test(), llvm::AggressiveAntiDepState::UnionGroups(), and llvm::AntiDepBreaker::UpdateDbgValues().

FinishBlock()

void AggressiveAntiDepBreaker::FinishBlock ( )

overridevirtual

Finish anti-dep breaking for a basic block.

Implements llvm::AntiDepBreaker.

Definition at line 184 of file AggressiveAntiDepBreaker.cpp.

Observe()

void AggressiveAntiDepBreaker::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 189 of file AggressiveAntiDepBreaker.cpp.

References assert(), llvm::dbgs(), llvm::Pass::dump(), llvm::AggressiveAntiDepState::GetDefIndices(), llvm::AggressiveAntiDepState::GetGroup(), llvm::MCRegisterInfo::getNumRegs(), llvm::AggressiveAntiDepState::IsLive(), LLVM_DEBUG, MI, llvm::printReg(), and llvm::AggressiveAntiDepState::UnionGroups().

operator=()

AggressiveAntiDepBreaker & llvm::AggressiveAntiDepBreaker::operator= ( const AggressiveAntiDepBreaker &  other )

delete

StartBlock()

void AggressiveAntiDepBreaker::StartBlock ( MachineBasicBlock *  BB )

overridevirtual

Initialize anti-dep breaking for a new basic block.

Implements llvm::AntiDepBreaker.

Definition at line 146 of file AggressiveAntiDepBreaker.cpp.

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

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

• lib/CodeGen/AggressiveAntiDepBreaker.h
• lib/CodeGen/AggressiveAntiDepBreaker.cpp