llvm::RegisterPressure Struct Reference

Base class for register pressure results. More...

#include <RegisterPressure.h>

Inheritance diagram for llvm::RegisterPressure:

Collaboration diagram for llvm::RegisterPressure:

List of all members.

Public Member Functions
void	increase (unsigned Reg, const TargetRegisterInfo *TRI, const MachineRegisterInfo *MRI)
	Directly increase pressure only within this RegisterPressure result.
void	decrease (unsigned Reg, const TargetRegisterInfo *TRI, const MachineRegisterInfo *MRI)
	Directly decrease pressure only within this RegisterPressure result.
void	dump (const TargetRegisterInfo *TRI) const
Public Attributes
std::vector< unsigned >	MaxSetPressure
	Map of max reg pressure indexed by pressure set ID, not class ID.
SmallVector< unsigned, 8 >	LiveInRegs
	List of live in virtual registers or physical register units.
SmallVector< unsigned, 8 >	LiveOutRegs

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Detailed Description

Base class for register pressure results.

Definition at line 30 of file RegisterPressure.h.

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Member Function Documentation

void RegisterPressure::decrease	(	unsigned	Reg,
		const TargetRegisterInfo *	TRI,
		const MachineRegisterInfo *	MRI
	)

Directly decrease pressure only within this RegisterPressure result.

Decrease register pressure for each pressure set impacted by this register class. This is only useful to account for spilling or rematerialization.

Parameters:

Reg	is either a virtual register number or register unit number.

Definition at line 65 of file RegisterPressure.cpp.

References decreaseSetPressure(), llvm::MachineRegisterInfo::getRegClass(), llvm::TargetRegisterInfo::getRegClassPressureSets(), llvm::TargetRegisterInfo::getRegClassWeight(), llvm::TargetRegisterInfo::getRegUnitPressureSets(), llvm::TargetRegisterInfo::getRegUnitWeight(), llvm::TargetRegisterInfo::isVirtualRegister(), MaxSetPressure, and llvm::RegClassWeight::RegWeight.

void RegisterPressure::dump

(

const TargetRegisterInfo *

TRI

)

const

Definition at line 87 of file RegisterPressure.cpp.

References llvm::dbgs(), dumpSetPressure(), LiveInRegs, LiveOutRegs, MaxSetPressure, and llvm::SmallVectorTemplateCommon< T, typename >::size().

Referenced by llvm::RegPressureTracker::dump(), and llvm::ScheduleDAGMI::initRegPressure().

void RegisterPressure::increase	(	unsigned	Reg,
		const TargetRegisterInfo *	TRI,
		const MachineRegisterInfo *	MRI
	)

Directly increase pressure only within this RegisterPressure result.

Increase register pressure for each pressure set impacted by this register class. Normally called by RegPressureTracker, but may be called manually to account for live through (global liveness).

Parameters:

Reg	is either a virtual register number or register unit number.

Definition at line 49 of file RegisterPressure.cpp.

References llvm::MachineRegisterInfo::getRegClass(), llvm::TargetRegisterInfo::getRegClassPressureSets(), llvm::TargetRegisterInfo::getRegClassWeight(), llvm::TargetRegisterInfo::getRegUnitPressureSets(), llvm::TargetRegisterInfo::getRegUnitWeight(), increaseSetPressure(), llvm::TargetRegisterInfo::isVirtualRegister(), MaxSetPressure, and llvm::RegClassWeight::RegWeight.

Referenced by llvm::RegPressureTracker::discoverLiveIn(), and llvm::RegPressureTracker::discoverLiveOut().

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Member Data Documentation

SmallVector<unsigned,8> llvm::RegisterPressure::LiveInRegs

List of live in virtual registers or physical register units.

Definition at line 35 of file RegisterPressure.h.

Referenced by llvm::RegPressureTracker::closeTop(), llvm::RegPressureTracker::discoverLiveIn(), dump(), llvm::ScheduleDAGMI::initRegPressure(), llvm::IntervalPressure::openBottom(), llvm::RegionPressure::openBottom(), llvm::IntervalPressure::openTop(), llvm::RegionPressure::openTop(), llvm::IntervalPressure::reset(), and llvm::RegionPressure::reset().

SmallVector<unsigned,8> llvm::RegisterPressure::LiveOutRegs

Definition at line 36 of file RegisterPressure.h.

Referenced by llvm::RegPressureTracker::closeBottom(), llvm::RegPressureTracker::discoverLiveOut(), dump(), llvm::ScheduleDAGMI::initRegPressure(), llvm::IntervalPressure::reset(), and llvm::RegionPressure::reset().

std::vector<unsigned> llvm::RegisterPressure::MaxSetPressure

Map of max reg pressure indexed by pressure set ID, not class ID.

Definition at line 32 of file RegisterPressure.h.

Referenced by decrease(), dump(), llvm::RegPressureTracker::getDownwardPressure(), llvm::RegPressureTracker::getMaxDownwardPressureDelta(), llvm::RegPressureTracker::getMaxUpwardPressureDelta(), llvm::RegPressureTracker::getUpwardPressure(), increase(), llvm::RegPressureTracker::increaseRegPressure(), llvm::RegPressureTracker::init(), llvm::ScheduleDAGMI::initRegPressure(), llvm::ConvergingVLIWScheduler::pickNodeFromQueue(), llvm::IntervalPressure::reset(), llvm::RegionPressure::reset(), and llvm::ScheduleDAGMI::scheduleMI().

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

• RegisterPressure.h
• RegisterPressure.cpp