llvm::CriticalAntiDepBreaker Class Reference

#include "CodeGen/CriticalAntiDepBreaker.h"

Inheritance diagram for llvm::CriticalAntiDepBreaker:

Collaboration 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. More...
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. More...
void	Observe (MachineInstr &MI, unsigned Count, unsigned InsertPosIndex) override
	Update liveness information to account for the current instruction, which will not be scheduled. More...
void	FinishBlock () override
	Finish anti-dep breaking for a basic block. More...
Public Member Functions inherited from llvm::AntiDepBreaker
virtual	~AntiDepBreaker ()
void	UpdateDbgValue (MachineInstr &MI, unsigned OldReg, unsigned NewReg)
	Update DBG_VALUE if dependency breaker is updating other machine instruction to use NewReg. More...
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. More...

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

Detailed Description

Definition at line 37 of file CriticalAntiDepBreaker.h.

Constructor & Destructor Documentation

CriticalAntiDepBreaker()

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

Definition at line 45 of file CriticalAntiDepBreaker.cpp.

References ~CriticalAntiDepBreaker().

~CriticalAntiDepBreaker()

CriticalAntiDepBreaker::~CriticalAntiDepBreaker ( )

overridedefault

Referenced by CriticalAntiDepBreaker().

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 438 of file CriticalAntiDepBreaker.cpp.

Referenced by CriticalPathStep().

FinishBlock()

void CriticalAntiDepBreaker::FinishBlock ( )

overridevirtual

Finish anti-dep breaking for a basic block.

Implements llvm::AntiDepBreaker.

Definition at line 102 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 107 of file CriticalAntiDepBreaker.cpp.

References assert(), llvm::MCRegisterInfo::getNumRegs(), llvm::MachineInstr::isDebugInstr(), llvm::MachineInstr::isKill(), and Reg.

StartBlock()

void CriticalAntiDepBreaker::StartBlock ( MachineBasicBlock *  BB )

overridevirtual

Initialize anti-dep breaking for a new basic block.

Implements llvm::AntiDepBreaker.

Definition at line 55 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(), Reg, llvm::BitVector::reset(), SI, llvm::MachineBasicBlock::size(), llvm::MachineBasicBlock::succ_begin(), llvm::MachineBasicBlock::succ_end(), 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