llvm::GCNDownwardRPTrackerBase Class Reference

Common behavior for downward RP trackers. Unconstructible directly. More...

#include "Target/AMDGPU/GCNRegPressure.h"

Inheritance diagram for llvm::GCNDownwardRPTrackerBase:

Public Member Functions
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 ()
GCNRegPressure	getPressure () const
decltype(LiveRegs)	moveLiveRegs ()

Protected Member Functions
	GCNDownwardRPTrackerBase (LiveIntervals &LIS)
void	retireDeadOperands (const MachineInstr &MI, SlotIndex SI)
	Retires all lanes of MI's register operands 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	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.

Additional Inherited Members
Public Types inherited from llvm::GCNRPTracker
using	LiveRegSet = DenseMap<unsigned, LaneBitmask>
Protected Attributes inherited from llvm::GCNRPTracker
LiveIntervals &	LIS
LiveRegSet	LiveRegs
GCNRegPressure	CurPressure
GCNRegPressure	MaxPressure
const MachineInstr *	LastTrackedMI = nullptr
const MachineRegisterInfo *	MRI = nullptr

Detailed Description

Common behavior for downward RP trackers. Unconstructible directly.

Definition at line 390 of file GCNRegPressure.h.

Constructor & Destructor Documentation

GCNDownwardRPTrackerBase()

llvm::GCNDownwardRPTrackerBase::GCNDownwardRPTrackerBase ( LiveIntervals & LIS )

inlineprotected

Definition at line 400 of file GCNRegPressure.h.

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

Referenced by llvm::GCNDownwardRPTracker::GCNDownwardRPTracker(), and llvm::GCNManualDownwardRPTracker::GCNManualDownwardRPTracker().

Member Function Documentation

addDefs()

void GCNDownwardRPTrackerBase::addDefs ( const MachineInstr & MI )

protected

Adds all lanes (dead or not) defined by MI's register operands to CurPressure.

Definition at line 722 of file GCNRegPressure.cpp.

References assert(), llvm::GCNRPTracker::CurPressure, getDefRegMask(), llvm::GCNRPTracker::LiveRegs, llvm::max(), llvm::GCNRPTracker::MaxPressure, MI, and llvm::GCNRPTracker::MRI.

Referenced by llvm::GCNManualDownwardRPTracker::advance(), and llvm::GCNDownwardRPTracker::advanceToNext().

bumpDownwardPressure()

GCNRegPressure GCNDownwardRPTrackerBase::bumpDownwardPressure	(	const MachineInstr *	MI,
		const SIRegisterInfo *	TRI ) const

Mostly copy/paste from CodeGen/RegisterPressure.cpp Calculate the impact MI will have on CurPressure and.

Returns

the speculated pressure. In order to support RP Speculation, this does not rely on the implicit program ordering in the LiveIntervals.

Definition at line 817 of file GCNRegPressure.cpp.

References llvm::RegisterOperands::adjustLaneLiveness(), assert(), llvm::RegisterOperands::collect(), llvm::GCNRPTracker::CurPressure, llvm::RegisterOperands::Defs, llvm::DenseMapBase< StorageT, KeyT, ValueT, KeyInfoT, BucketT >::end(), llvm::DenseMapBase< StorageT, KeyT, ValueT, KeyInfoT, BucketT >::find(), findUseBetween(), llvm::GCNRPTracker::getLastUsedLanes(), llvm::GCNRegPressure::inc(), llvm::GCNRPTracker::LastTrackedMI, llvm::GCNRPTracker::LIS, llvm::GCNRPTracker::LiveRegs, MBB, MI, llvm::GCNRPTracker::MRI, llvm::LaneBitmask::none(), llvm::skipDebugInstructionsForward(), TRI, and llvm::RegisterOperands::Uses.

retireDeadOperands()

void GCNDownwardRPTrackerBase::retireDeadOperands ( const MachineInstr & MI, SlotIndex SI )

protected

Retires all lanes of MI's register operands that are dead at SI, according to LIS.

Definition at line 701 of file GCNRegPressure.cpp.

References assert(), llvm::GCNRPTracker::CurPressure, llvm::SmallSet< T, N, C >::insert(), llvm::max(), llvm::GCNRPTracker::MaxPressure, MI, and llvm::GCNRPTracker::MRI.

Referenced by llvm::GCNManualDownwardRPTracker::advance(), and llvm::GCNDownwardRPTracker::advanceBeforeNext().

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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