#include "Target/AMDGPU/GCNRegPressure.h"

Public Types
enum	RegKind { SGPR , VGPR , AGPR , AVGPR , TOTAL_KINDS }

Public Member Functions
	GCNRegPressure ()
bool	empty () const
void	clear ()
unsigned	getSGPRNum () const
unsigned	getVGPRNum (bool UnifiedVGPRFile) const
unsigned	getArchVGPRNum () const
unsigned	getAGPRNum () const
unsigned	getAVGPRNum () const
unsigned	getVGPRTuplesWeight () const
unsigned	getSGPRTuplesWeight () const
unsigned	getOccupancy (const GCNSubtarget &ST, unsigned DynamicVGPRBlockSize) const
void	inc (unsigned Reg, LaneBitmask PrevMask, LaneBitmask NewMask, const MachineRegisterInfo &MRI)
bool	higherOccupancy (const GCNSubtarget &ST, const GCNRegPressure &O, unsigned DynamicVGPRBlockSize) const
bool	less (const MachineFunction &MF, const GCNRegPressure &O, unsigned MaxOccupancy=std::numeric_limits< unsigned >::max()) const
	Compares `this` GCNRegpressure to `O`, returning true if `this` is less.
bool	operator== (const GCNRegPressure &O) const
bool	operator!= (const GCNRegPressure &O) const
GCNRegPressure &	operator+= (const GCNRegPressure &RHS)
GCNRegPressure &	operator-= (const GCNRegPressure &RHS)
void	dump () const

Static Public Member Functions
static unsigned	getUnifiedVGPRNum (unsigned NumArchVGPRs, unsigned NumAGPRs, unsigned NumAVGPRs)
	Returns the aggregated VGPR pressure, assuming `NumArchVGPRs` ArchVGPRs `NumAGPRs` AGPRS, and `NumAVGPRs` AVGPRs for a target with a unified VGPR file.

Friends
GCNRegPressure	max (const GCNRegPressure &P1, const GCNRegPressure &P2)
Printable	print (const GCNRegPressure &RP, const GCNSubtarget *ST=nullptr, unsigned DynamicVGPRBlockSize=0)

Detailed Description

Definition at line 31 of file GCNRegPressure.h.

Member Enumeration Documentation

◆ RegKind

enum llvm::GCNRegPressure::RegKind

Enumerator
SGPR
VGPR
AGPR
AVGPR
TOTAL_KINDS

Definition at line 32 of file GCNRegPressure.h.

Constructor & Destructor Documentation

◆ GCNRegPressure()

llvm::GCNRegPressure::GCNRegPressure ( )

inline

Definition at line 34 of file GCNRegPressure.h.

References clear().

Referenced by higherOccupancy(), less(), max, operator!=(), operator+=(), operator-=(), operator==(), and print.

Member Function Documentation

◆ clear()

void llvm::GCNRegPressure::clear ( )

inline

Definition at line 42 of file GCNRegPressure.h.

Referenced by GCNRegPressure().

◆ dump()

void GCNRegPressure::dump ( ) const

Definition at line 829 of file GCNRegPressure.cpp.

References llvm::dbgs(), and print.

◆ empty()

bool llvm::GCNRegPressure::empty ( ) const

inline

Definition at line 38 of file GCNRegPressure.h.

References AGPR, AVGPR, SGPR, and VGPR.

Referenced by llvm::GCNIterativeScheduler::scheduleRegion().

◆ getAGPRNum()

unsigned llvm::GCNRegPressure::getAGPRNum ( ) const

inline

Returns: the AccVGPR32 pressure

Definition at line 76 of file GCNRegPressure.h.

References AGPR.

Referenced by getRegisterPressures(), and less().

◆ getArchVGPRNum()

unsigned llvm::GCNRegPressure::getArchVGPRNum ( ) const

inline

Returns: the ArchVGPR32 pressure, plus the AVGPRS which we assume will be allocated as VGPR

Definition at line 74 of file GCNRegPressure.h.

References AVGPR, and VGPR.

Referenced by getRegisterPressures().

◆ getAVGPRNum()

unsigned llvm::GCNRegPressure::getAVGPRNum ( ) const

inline

Returns: the AVGPR32 pressure

Definition at line 78 of file GCNRegPressure.h.

References AVGPR.

◆ getOccupancy()

unsigned llvm::GCNRegPressure::getOccupancy	(	const GCNSubtarget &	ST,
		unsigned	DynamicVGPRBlockSize ) const

inline

Definition at line 86 of file GCNRegPressure.h.

References getSGPRNum(), and getVGPRNum().

Referenced by higherOccupancy().

◆ getSGPRNum()

unsigned llvm::GCNRegPressure::getSGPRNum ( ) const

inline

Returns: the SGPR32 pressure

Definition at line 45 of file GCNRegPressure.h.

References SGPR.

Referenced by getOccupancy(), getRegisterPressures(), and less().

◆ getSGPRTuplesWeight()

unsigned llvm::GCNRegPressure::getSGPRTuplesWeight ( ) const

inline

Definition at line 84 of file GCNRegPressure.h.

References SGPR, and TOTAL_KINDS.

Referenced by less().

◆ getUnifiedVGPRNum()

unsigned llvm::GCNRegPressure::getUnifiedVGPRNum	(	unsigned	NumArchVGPRs,
		unsigned	NumAGPRs,
		unsigned	NumAVGPRs )

inlinestatic

Returns the aggregated VGPR pressure, assuming NumArchVGPRs ArchVGPRs NumAGPRs AGPRS, and NumAVGPRs AVGPRs for a target with a unified VGPR file.

Definition at line 62 of file GCNRegPressure.h.

References llvm::alignTo(), and llvm::AMDGPU::IsaInfo::getArchVGPRAllocGranule().

Referenced by getVGPRNum().

◆ getVGPRNum()

unsigned llvm::GCNRegPressure::getVGPRNum ( bool UnifiedVGPRFile ) const

inline

Returns: the aggregated ArchVGPR32, AccVGPR32, and Pseudo AVGPR pressure dependent upon UnifiedVGPRFile

Definition at line 48 of file GCNRegPressure.h.

References AGPR, AVGPR, getUnifiedVGPRNum(), and VGPR.

Referenced by getOccupancy(), and less().

◆ getVGPRTuplesWeight()

unsigned llvm::GCNRegPressure::getVGPRTuplesWeight ( ) const

inline

Definition at line 80 of file GCNRegPressure.h.

References AGPR, AVGPR, TOTAL_KINDS, and VGPR.

Referenced by less().

◆ higherOccupancy()

bool llvm::GCNRegPressure::higherOccupancy	(	const GCNSubtarget &	ST,
		const GCNRegPressure &	O,
		unsigned	DynamicVGPRBlockSize ) const

inline

Definition at line 98 of file GCNRegPressure.h.

References GCNRegPressure(), and getOccupancy().

◆ inc()

void GCNRegPressure::inc	(	unsigned	Reg,
		LaneBitmask	PrevMask,
		LaneBitmask	NewMask,
		const MachineRegisterInfo &	MRI )

Definition at line 48 of file GCNRegPressure.cpp.

References assert(), llvm::SIRegisterInfo::getNumCoveredRegs(), MRI, llvm::LaneBitmask::none(), std::swap(), TOTAL_KINDS, and TRI.

Referenced by llvm::GCNDownwardRPTracker::bumpDownwardPressure(), llvm::getRegPressure(), and llvm::GCNUpwardRPTracker::recede().

◆ less()

bool GCNRegPressure::less	(	const MachineFunction &	MF,
		const GCNRegPressure &	O,
		unsigned	MaxOccupancy = std::numeric_limits<unsigned>::max() ) const

Compares this GCNRegpressure to O, returning true if this is less.

Since GCNRegpressure contains different types of pressures, and due to target-specific pecularities (e.g. we care about occupancy rather than raw register usage), we determine if this GCNRegPressure is less than O based on the following tiered comparisons (in order order of precedence):

Better occupancy
Less spilling (first preference to VGPR spills, then to SGPR spills)
Less tuple register pressure (first preference to VGPR tuples if we determine that SGPR pressure is not important)
Less raw register pressure (first preference to VGPR tuples if we determine that SGPR pressure is not important)

Definition at line 99 of file GCNRegPressure.cpp.

References GCNRegPressure(), getAGPRNum(), llvm::MachineFunction::getInfo(), getSGPRNum(), getSGPRTuplesWeight(), llvm::MachineFunction::getSubtarget(), getVGPRNum(), getVGPRTuplesWeight(), and I.

◆ operator!=()

bool llvm::GCNRegPressure::operator!= ( const GCNRegPressure & O ) const

inline

Definition at line 123 of file GCNRegPressure.h.

References GCNRegPressure().

◆ operator+=()

GCNRegPressure & llvm::GCNRegPressure::operator+= ( const GCNRegPressure & RHS )

inline

Definition at line 127 of file GCNRegPressure.h.

References GCNRegPressure(), I, and RHS.

◆ operator-=()

GCNRegPressure & llvm::GCNRegPressure::operator-= ( const GCNRegPressure & RHS )

inline

Definition at line 133 of file GCNRegPressure.h.

References GCNRegPressure(), I, and RHS.

◆ operator==()

bool llvm::GCNRegPressure::operator== ( const GCNRegPressure & O ) const

inline

Definition at line 119 of file GCNRegPressure.h.

References GCNRegPressure().

◆ max

GCNRegPressure max	(	const GCNRegPressure &	P1,
		const GCNRegPressure &	P2 )

friend

Definition at line 158 of file GCNRegPressure.h.

References GCNRegPressure(), and I.

◆ print

Printable print	(	const GCNRegPressure &	RP,
		const GCNSubtarget *	ST = nullptr,
		unsigned	DynamicVGPRBlockSize = 0 )

friend

References GCNRegPressure().

Referenced by dump().

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

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

Public Types

Public Member Functions

Static Public Member Functions

Friends

Detailed Description

Member Enumeration Documentation

◆ RegKind

Constructor & Destructor Documentation

◆ GCNRegPressure()

Member Function Documentation

◆ clear()

◆ dump()

◆ empty()

◆ getAGPRNum()

◆ getArchVGPRNum()

◆ getAVGPRNum()

◆ getOccupancy()

◆ getSGPRNum()

◆ getSGPRTuplesWeight()

◆ getUnifiedVGPRNum()

◆ getVGPRNum()

◆ getVGPRTuplesWeight()

◆ higherOccupancy()

◆ inc()

◆ less()

◆ operator!=()

◆ operator+=()

◆ operator-=()

◆ operator==()

Friends And Related Symbol Documentation

◆ max

◆ print