#include "Target/AMDGPU/GCNRegPressure.h"

Inheritance diagram for llvm::GCNDownwardRPTracker:

Public Member Functions
	GCNDownwardRPTracker (const LiveIntervals &LIS_)
MachineBasicBlock::const_iterator	getNext () const
GCNRegPressure	moveMaxPressure ()
	`return` MaxPressure and clear it.
bool	reset (const MachineInstr &MI, const LiveRegSet *LiveRegs=nullptr)
	Reset tracker to the point before the `MI` filling `LiveRegs` upon this point using LIS.
bool	advanceBeforeNext (MachineInstr *MI=nullptr, bool UseInternalIterator=true)
	Move to the state right before the next MI or after the end of MBB.
void	advanceToNext (MachineInstr *MI=nullptr, bool UseInternalIterator=true)
	Move to the state at the MI, advanceBeforeNext has to be called first.
bool	advance (MachineInstr *MI=nullptr, bool UseInternalIterator=true)
	Move to the state at the next MI.
bool	advance (MachineBasicBlock::const_iterator End)
	Advance instructions until before `End`.
bool	advance (MachineBasicBlock::const_iterator Begin, MachineBasicBlock::const_iterator End, const LiveRegSet *LiveRegsCopy=nullptr)
	Reset to `Begin` and advance to `End`.
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.
void	reset (const MachineInstr &MI, const LiveRegSet *LiveRegsCopy, bool After)
void	reset (const MachineRegisterInfo &MRI_, const LiveRegSet &LiveRegs_)
Public Member Functions inherited from llvm::GCNRPTracker
void	reset (const MachineRegisterInfo &MRI_, const LiveRegSet &LiveRegs_)
const decltype(LiveRegs) &	getLiveRegs () const
const MachineInstr *	getLastTrackedMI () const
void	clearMaxPressure ()
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::GCNRPTracker
	GCNRPTracker (const LiveIntervals &LIS_)
void	reset (const MachineInstr &MI, const LiveRegSet *LiveRegsCopy, bool After)
void	bumpDeadDefs (ArrayRef< VRegMaskOrUnit > DeadDefs)
	Mostly copy/paste from CodeGen/RegisterPressure.cpp.
LaneBitmask	getLastUsedLanes (Register RegUnit, SlotIndex Pos) const
	Mostly copy/paste from CodeGen/RegisterPressure.cpp.
Protected Attributes inherited from llvm::GCNRPTracker
const LiveIntervals &	LIS
LiveRegSet	LiveRegs
GCNRegPressure	CurPressure
GCNRegPressure	MaxPressure
const MachineInstr *	LastTrackedMI = nullptr
const MachineRegisterInfo *	MRI = nullptr

Detailed Description

Definition at line 348 of file GCNRegPressure.h.

Constructor & Destructor Documentation

◆ GCNDownwardRPTracker()

llvm::GCNDownwardRPTracker::GCNDownwardRPTracker ( const LiveIntervals & LIS_ )

inline

Definition at line 355 of file GCNRegPressure.h.

References llvm::GCNRPTracker::GCNRPTracker().

Member Function Documentation

◆ advance() [1/3]

bool GCNDownwardRPTracker::advance	(	MachineBasicBlock::const_iterator	Begin,
		MachineBasicBlock::const_iterator	End,
		const LiveRegSet *	LiveRegsCopy = nullptr )

Reset to Begin and advance to End.

Definition at line 699 of file GCNRegPressure.cpp.

References advance(), and reset().

◆ advance() [2/3]

bool GCNDownwardRPTracker::advance ( MachineBasicBlock::const_iterator End )

Advance instructions until before End.

Definition at line 693 of file GCNRegPressure.cpp.

References advance().

◆ advance() [3/3]

bool GCNDownwardRPTracker::advance	(	MachineInstr *	MI = nullptr,
		bool	UseInternalIterator = true )

Move to the state at the next MI.

returns false if reached end of block. If UseInternalIterator is true, then internal iterators are used and set to process in program order. If UseInternalIterator is false, then it is assumed that the tracker is using an externally managed iterator, and advance* calls will not update the state of the iterator. In such cases, the tracker will move to the state right before the provided MI and use LIS for RP calculations.

Definition at line 680 of file GCNRegPressure.cpp.

References advanceBeforeNext(), advanceToNext(), and MI.

Referenced by advance(), and advance().

◆ advanceBeforeNext()

bool GCNDownwardRPTracker::advanceBeforeNext	(	MachineInstr *	MI = nullptr,
		bool	UseInternalIterator = true )

Move to the state right before the next MI or after the end of MBB.

returns false if reached end of the block. If UseInternalIterator is true, then internal iterators are used and set to process in program order. If UseInternalIterator is false, then it is assumed that the tracker is using an externally managed iterator, and advance* calls will not update the state of the iterator. In such cases, the tracker will move to the state right before the provided MI and use LIS for RP calculations.

UseInternalIterator

Definition at line 589 of file GCNRegPressure.cpp.

References assert(), llvm::GCNRPTracker::CurPressure, llvm::LaneBitmask::getNone(), llvm::LiveInterval::hasSubRanges(), llvm::SmallSet< T, N, C >::insert(), llvm::GCNRPTracker::LastTrackedMI, llvm::GCNRPTracker::LIS, llvm::LiveRange::liveAt(), llvm::GCNRPTracker::LiveRegs, llvm_unreachable, llvm::max(), llvm::GCNRPTracker::MaxPressure, MI, llvm::GCNRPTracker::MRI, llvm::MachineInstr::operands(), and llvm::LiveInterval::subranges().

Referenced by advance(), and llvm::GCNRegPressurePrinter::runOnMachineFunction().

◆ advanceToNext()

void GCNDownwardRPTracker::advanceToNext	(	MachineInstr *	MI = nullptr,
		bool	UseInternalIterator = true )

Move to the state at the MI, advanceBeforeNext has to be called first.

If UseInternalIterator is true, then internal iterators are used and set to process in program order. If UseInternalIterator is false, then it is assumed that the tracker is using an externally managed iterator, and advance* calls will not update the state of the iterator. In such cases, the tracker will move to the state at the provided MI .

Definition at line 655 of file GCNRegPressure.cpp.

References llvm::MachineInstr::all_defs(), llvm::GCNRPTracker::CurPressure, getDefRegMask(), llvm::GCNRPTracker::LastTrackedMI, llvm::GCNRPTracker::LiveRegs, llvm::max(), llvm::GCNRPTracker::MaxPressure, MI, llvm::GCNRPTracker::MRI, and llvm::skipDebugInstructionsForward().

Referenced by advance(), and llvm::GCNRegPressurePrinter::runOnMachineFunction().

◆ bumpDownwardPressure()

GCNRegPressure GCNDownwardRPTracker::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 732 of file GCNRegPressure.cpp.

References llvm::RegisterOperands::adjustLaneLiveness(), assert(), llvm::RegisterOperands::collect(), llvm::GCNRPTracker::CurPressure, llvm::RegisterOperands::Defs, 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.

Referenced by getRegisterPressures().

◆ getNext()

MachineBasicBlock::const_iterator llvm::GCNDownwardRPTracker::getNext ( ) const

inline

Definition at line 359 of file GCNRegPressure.h.

◆ moveMaxPressure()

GCNRegPressure llvm::GCNDownwardRPTracker::moveMaxPressure ( )

inline

return MaxPressure and clear it.

Definition at line 362 of file GCNRegPressure.h.

References llvm::GCNRPTracker::MaxPressure.

◆ reset() [1/3]

bool GCNDownwardRPTracker::reset	(	const MachineInstr &	MI,
		const LiveRegSet *	LiveRegs = nullptr )

Reset tracker to the point before the MI filling LiveRegs upon this point using LIS.

returns false if block is empty except debug values.

Definition at line 576 of file GCNRegPressure.cpp.

References llvm::GCNRPTracker::LastTrackedMI, MI, llvm::GCNRPTracker::MRI, llvm::GCNRPTracker::reset(), and llvm::skipDebugInstructionsForward().

Referenced by advance(), and llvm::GCNRegPressurePrinter::runOnMachineFunction().

◆ reset() [2/3]

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

Definition at line 273 of file GCNRegPressure.cpp.

◆ reset() [3/3]

void GCNRPTracker::reset	(	const MachineRegisterInfo &	MRI_,
		const LiveRegSet &	LiveRegs_ )

Definition at line 283 of file GCNRegPressure.cpp.

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

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

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ GCNDownwardRPTracker()

Member Function Documentation

◆ advance() [1/3]

◆ advance() [2/3]

◆ advance() [3/3]

◆ advanceBeforeNext()

◆ advanceToNext()

◆ bumpDownwardPressure()

◆ getNext()

◆ moveMaxPressure()

◆ reset() [1/3]

◆ reset() [2/3]

◆ reset() [3/3]