llvm::GCNRPTarget Class Reference

Models a register pressure target, allowing to evaluate and track register savings against that target from a starting GCNRegPressure. More...

#include "Target/AMDGPU/GCNRegPressure.h"

Public Member Functions
	GCNRPTarget (const MachineFunction &MF, const GCNRegPressure &RP)
	Sets up the target such that the register pressure starting at RP does not show register spilling on function MF (w.r.t.
	GCNRPTarget (unsigned NumSGPRs, unsigned NumVGPRs, const MachineFunction &MF, const GCNRegPressure &RP)
	Sets up the target such that the register pressure starting at RP does not use more than NumSGPRs SGPRs and NumVGPRs VGPRs on function MF.
	GCNRPTarget (unsigned Occupancy, const MachineFunction &MF, const GCNRegPressure &RP)
	Sets up the target such that the register pressure starting at RP does not prevent achieving an occupancy of at least Occupancy on function MF.
void	setTarget (unsigned NumSGPRs, unsigned NumVGPRs)
	Changes the target (same semantics as constructor).
const GCNRegPressure &	getCurrentRP () const
void	setRP (const GCNRegPressure &NewRP)
bool	isSaveBeneficial (Register Reg) const
	Determines whether saving virtual register Reg will be beneficial towards achieving the RP target.
void	saveReg (Register Reg, LaneBitmask Mask, const MachineRegisterInfo &MRI)
	Saves virtual register Reg with lanemask Mask.
bool	satisfied () const
	Whether the current RP is at or below the defined pressure target.

Friends
raw_ostream &	operator<< (raw_ostream &OS, const GCNRPTarget &Target)

Detailed Description

Models a register pressure target, allowing to evaluate and track register savings against that target from a starting GCNRegPressure.

Definition at line 184 of file GCNRegPressure.h.

Constructor & Destructor Documentation

GCNRPTarget() [1/3]

GCNRPTarget::GCNRPTarget	(	const MachineFunction &	MF,
		const GCNRegPressure &	RP )

Sets up the target such that the register pressure starting at RP does not show register spilling on function MF (w.r.t.

the function's mininum target occupancy).

Definition at line 371 of file GCNRegPressure.cpp.

References F, GCNRPTarget(), and setTarget().

Referenced by GCNRPTarget(), GCNRPTarget(), GCNRPTarget(), and operator<<.

GCNRPTarget() [2/3]

GCNRPTarget::GCNRPTarget	(	unsigned	NumSGPRs,
		unsigned	NumVGPRs,
		const MachineFunction &	MF,
		const GCNRegPressure &	RP )

Sets up the target such that the register pressure starting at RP does not use more than NumSGPRs SGPRs and NumVGPRs VGPRs on function MF.

Definition at line 378 of file GCNRegPressure.cpp.

References GCNRPTarget(), and setTarget().

GCNRPTarget() [3/3]

GCNRPTarget::GCNRPTarget	(	unsigned	Occupancy,
		const MachineFunction &	MF,
		const GCNRegPressure &	RP )

Sets up the target such that the register pressure starting at RP does not prevent achieving an occupancy of at least Occupancy on function MF.

Definition at line 384 of file GCNRegPressure.cpp.

References GCNRPTarget(), llvm::SIMachineFunctionInfo::getDynamicVGPRBlockSize(), and setTarget().

Member Function Documentation

getCurrentRP()

const GCNRegPressure & llvm::GCNRPTarget::getCurrentRP ( ) const

inline

Definition at line 206 of file GCNRegPressure.h.

isSaveBeneficial()

bool GCNRPTarget::isSaveBeneficial

(

Register

Reg

)

const

Determines whether saving virtual register Reg will be beneficial towards achieving the RP target.

Definition at line 408 of file GCNRegPressure.cpp.

References llvm::SIRegisterInfo::isAGPRClass(), llvm::SIRegisterInfo::isSGPRClass(), MRI, and TRI.

satisfied()

bool GCNRPTarget::satisfied

(

)

const

Whether the current RP is at or below the defined pressure target.

Definition at line 425 of file GCNRegPressure.cpp.

saveReg()

void llvm::GCNRPTarget::saveReg ( Register Reg, LaneBitmask Mask, const MachineRegisterInfo & MRI )

inline

Saves virtual register Reg with lanemask Mask.

Definition at line 215 of file GCNRegPressure.h.

References llvm::LaneBitmask::getNone(), MRI, and Reg.

setRP()

void llvm::GCNRPTarget::setRP ( const GCNRegPressure & NewRP )

inline

Definition at line 208 of file GCNRegPressure.h.

setTarget()

void GCNRPTarget::setTarget	(	unsigned	NumSGPRs,
		unsigned	NumVGPRs )

Changes the target (same semantics as constructor).

Definition at line 394 of file GCNRegPressure.cpp.

Referenced by GCNRPTarget(), GCNRPTarget(), and GCNRPTarget().

Friends And Related Symbol Documentation

operator<<

raw_ostream & operator<< ( raw_ostream & OS, const GCNRPTarget & Target )

friend

Definition at line 223 of file GCNRegPressure.h.

References GCNRPTarget().

---

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

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