llvm::PressureChange Class Reference

#include <RegisterPressure.h>

Public Member Functions
	PressureChange ()
	PressureChange (unsigned id)
bool	isValid () const
unsigned	getPSet () const
unsigned	getPSetOrMax () const
int	getUnitInc () const
void	setUnitInc (int Inc)
bool	operator== (const PressureChange &RHS) const

Detailed Description

Capture a change in pressure for a single pressure set. UnitInc may be expressed in terms of upward or downward pressure depending on the client and will be dynamically adjusted for current liveness.

Pressure increments are tiny, typically 1-2 units, and this is only for heuristics, so we don't check UnitInc overflow. Instead, we may have a higher level assert that pressure is consistent within a region. We also effectively ignore dead defs which don't affect heuristics much.

Definition at line 100 of file RegisterPressure.h.

Constructor & Destructor Documentation

llvm::PressureChange::PressureChange ( )

inline

Definition at line 104 of file RegisterPressure.h.

llvm::PressureChange::PressureChange ( unsigned  id )

inline

Definition at line 105 of file RegisterPressure.h.

Member Function Documentation

unsigned llvm::PressureChange::getPSet ( ) const

inline

Definition at line 111 of file RegisterPressure.h.

References isValid().

Referenced by llvm::PressureDiff::addPressureChange(), llvm::RegPressureTracker::getMaxUpwardPressureDelta(), and llvm::ConvergingVLIWScheduler::traceCandidate().

unsigned llvm::PressureChange::getPSetOrMax ( ) const

inline

Definition at line 116 of file RegisterPressure.h.

Referenced by tryPressure().

int llvm::PressureChange::getUnitInc ( ) const

inline

Definition at line 118 of file RegisterPressure.h.

Referenced by llvm::PressureDiff::addPressureChange(), llvm::RegPressureTracker::getMaxDownwardPressureDelta(), llvm::RegPressureTracker::getMaxUpwardPressureDelta(), llvm::ConvergingVLIWScheduler::SchedulingCost(), llvm::ConvergingVLIWScheduler::traceCandidate(), and tryPressure().

bool llvm::PressureChange::isValid ( ) const

inline

Definition at line 109 of file RegisterPressure.h.

Referenced by llvm::PressureDiff::addPressureChange(), collectPDiff(), computeMaxPressureDelta(), llvm::RegPressureTracker::getMaxUpwardPressureDelta(), getPSet(), llvm::RegPressureTracker::getUpwardPressureDelta(), and llvm::ConvergingVLIWScheduler::traceCandidate().

bool llvm::PressureChange::operator== ( const PressureChange &  RHS ) const

inline

Definition at line 122 of file RegisterPressure.h.

void llvm::PressureChange::setUnitInc ( int  Inc )

inline

Definition at line 120 of file RegisterPressure.h.

Referenced by llvm::PressureDiff::addPressureChange(), computeExcessPressureDelta(), computeMaxPressureDelta(), and llvm::RegPressureTracker::getUpwardPressureDelta().

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

• RegisterPressure.h