llvm::GCNManualDownwardRPTracker Class Reference

Downward RP tracker that relies on the user to provide the next instruction down the instruction stream. More...

#include "Target/AMDGPU/GCNRegPressure.h"

Inheritance diagram for llvm::GCNManualDownwardRPTracker:

Public Member Functions
	GCNManualDownwardRPTracker (LiveIntervals &LIS)
void	advance (const MachineInstr &MI)
	Advances to the state after MI.
void	reset (const MachineInstr &MI, bool After)
	Resets tracker before or After the provided MI, which can be a debug instruction.
void	reset (const MachineBasicBlock &MBB, bool End)
	Resets tracker at the start or End of the MBB.
void	reset (const MachineRegisterInfo &MRI, SlotIndex SI)
	Resets tracker at the specified slot index SI.
void	reset (const MachineRegisterInfo &MRI, const LiveRegSet &LiveRegs)
	Resets tracker with the provided LiveRegs.
Public Member Functions inherited from llvm::GCNDownwardRPTrackerBase
GCNRegPressure	bumpDownwardPressure (const MachineInstr *MI, const SIRegisterInfo *TRI) const
	Mostly copy/paste from CodeGen/RegisterPressure.cpp Calculate the impact MI will have on CurPressure and.
Public Member Functions inherited from llvm::GCNRPTracker
void	reset (const MachineRegisterInfo &MRI, const LiveRegSet &LiveRegs)
	Resets tracker with the provided LiveRegs.
const decltype(LiveRegs) &	getLiveRegs () const
const MachineInstr *	getLastTrackedMI () const
void	clearMaxPressure ()
const GCNRegPressure &	getMaxPressure () const
void	resetMaxPressure ()
void	setPressureCallback (std::function< void(const GCNRegPressure &)> CB)
	Sets a function that the tracker calls with the pressure of every program point that it folds into the maximum pressure.
GCNRegPressure	getPressure () const
decltype(LiveRegs)	moveLiveRegs ()

Additional Inherited Members
Public Types inherited from llvm::GCNRPTracker
using	LiveRegSet = DenseMap<unsigned, LaneBitmask>
Protected Member Functions inherited from llvm::GCNDownwardRPTrackerBase
	GCNDownwardRPTrackerBase (LiveIntervals &LIS)
void	retireDeadUses (const MachineInstr &MI)
	Retires the lanes of MI's used registers that die at MI, mirroring RegPressureTracker::advance().
void	retireDeadDefs (const MachineInstr &MI, SlotIndex SI)
	Retires the lanes defined by MI that are dead at SI, according to LIS.
void	addDefs (const MachineInstr &MI)
	Adds all lanes (dead or not) defined by MI's register operands to CurPressure.
Protected Member Functions inherited from llvm::GCNRPTracker
	GCNRPTracker (LiveIntervals &LIS_)
void	updateMaxPressure (const GCNRegPressure &RP)
	Folds the pressure RP of one program point into MaxPressure and passes it to the pressure callback.
void	reset (const MachineInstr &MI, bool After)
	Resets tracker before or After the provided MI, which can be a debug instruction.
void	reset (const MachineBasicBlock &MBB, bool End)
	Resets tracker at the start or End of the MBB.
void	reset (const MachineRegisterInfo &MRI, SlotIndex SI)
	Resets tracker at the specified slot index SI.
LaneBitmask	getLastUsedLanes (Register Reg, SlotIndex Pos) const
	Mostly copy/paste from CodeGen/RegisterPressure.cpp.
Protected Attributes inherited from llvm::GCNRPTracker
LiveIntervals &	LIS
LiveRegSet	LiveRegs
GCNRegPressure	CurPressure
GCNRegPressure	MaxPressure
MachineBasicBlock::const_iterator	LastTrackedMI
const MachineRegisterInfo *	MRI = nullptr
std::function< void(const GCNRegPressure &)>	PressureCallback

Detailed Description

Downward RP tracker that relies on the user to provide the next instruction down the instruction stream.

It still uses LIS for liveness queries.

Definition at line 528 of file GCNRegPressure.h.

Constructor & Destructor Documentation

GCNManualDownwardRPTracker()

llvm::GCNManualDownwardRPTracker::GCNManualDownwardRPTracker ( LiveIntervals & LIS )

inline

Definition at line 530 of file GCNRegPressure.h.

References llvm::GCNDownwardRPTrackerBase::GCNDownwardRPTrackerBase(), and llvm::GCNRPTracker::LIS.

Member Function Documentation

advance()

void GCNManualDownwardRPTracker::advance

(

const MachineInstr &

MI

)

Advances to the state after MI.

Definition at line 802 of file GCNRegPressure.cpp.

References llvm::GCNDownwardRPTrackerBase::addDefs(), llvm::GCNRPTracker::LastTrackedMI, llvm::GCNRPTracker::LIS, MI, llvm::GCNDownwardRPTrackerBase::retireDeadDefs(), and llvm::GCNDownwardRPTrackerBase::retireDeadUses().

reset() [1/4]

void GCNRPTracker::reset	(	const MachineBasicBlock &	MBB,
		bool	End )

Resets tracker at the start or End of the MBB.

Definition at line 359 of file GCNRegPressure.cpp.

reset() [2/4]

void GCNRPTracker::reset	(	const MachineInstr &	MI,
		bool	After )

Resets tracker before or After the provided MI, which can be a debug instruction.

Definition at line 356 of file GCNRegPressure.cpp.

reset() [3/4]

void GCNRPTracker::reset	(	const MachineRegisterInfo &	MRI,
		const LiveRegSet &	LiveRegs )

Resets tracker with the provided LiveRegs.

Definition at line 368 of file GCNRegPressure.cpp.

reset() [4/4]

void GCNRPTracker::reset	(	const MachineRegisterInfo &	MRI,
		SlotIndex	SI )

Resets tracker at the specified slot index SI.

Definition at line 362 of file GCNRegPressure.cpp.

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

• lib/Target/AMDGPU/GCNRegPressure.h
• lib/Target/AMDGPU/GCNRegPressure.cpp