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 ()
void	UpdateDbgValue (MachineInstr &MI, MCRegister OldReg, MCRegister 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, MCRegister OldReg, MCRegister 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

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

References BreakAntiDependencies(), llvm::Count, FinishBlock(), MI, Observe(), and StartBlock().

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 437 of file CriticalAntiDepBreaker.cpp.

References llvm::SDep::Anti, assert(), llvm::Count, CriticalPathStep(), llvm::SDep::Data, llvm::dbgs(), llvm::SUnit::getInstr(), llvm::MachineOperand::getReg(), I, llvm::MCRegister::id(), llvm::MachineOperand::isDef(), llvm::MachineOperand::isReg(), llvm::MachineOperand::isUse(), LLVM_DEBUG, MI, P, llvm::SUnit::Preds, llvm::printReg(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), Range, and llvm::AntiDepBreaker::UpdateDbgValues().

Referenced by ~CriticalAntiDepBreaker().

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::clear().

Referenced by ~CriticalAntiDepBreaker().

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::Count, and MI.

Referenced by ~CriticalAntiDepBreaker().

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::MachineFrameInfo::getPristineRegs(), I, llvm::MachineBasicBlock::isReturnBlock(), llvm::MCRegAliasIterator::isValid(), llvm::MachineBasicBlock::size(), llvm::MachineBasicBlock::successors(), and llvm::BitVector::test().

Referenced by ~CriticalAntiDepBreaker().

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

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