llvm::PhiLoweringHelper Class Reference

#include "Target/AMDGPU/SILowerI1Copies.h"

Public Member Functions
	PhiLoweringHelper (MachineFunction *MF, MachineDominatorTree *DT, MachinePostDominatorTree *PDT)
virtual	~PhiLoweringHelper ()=default
bool	lowerPhis ()
bool	isConstantLaneMask (Register Reg, bool &Val) const
MachineBasicBlock::iterator	getSaluInsertionAtEnd (MachineBasicBlock &MBB) const
	Return a point at the end of the given MBB to insert SALU instructions for lane mask calculation.
void	initializeLaneMaskRegisterAttributes (Register LaneMask)
void	initializeLaneMaskRegisterAttributes (MachineRegisterInfo::VRegAttrs Attrs)
bool	isLaneMaskReg (Register Reg) const
virtual void	markAsLaneMask (Register DstReg) const =0
virtual void	getCandidatesForLowering (SmallVectorImpl< MachineInstr * > &Vreg1Phis) const =0
virtual void	collectIncomingValuesFromPhi (const MachineInstr *MI, SmallVectorImpl< Incoming > &Incomings) const =0
virtual void	replaceDstReg (Register NewReg, Register OldReg, MachineBasicBlock *MBB)=0
virtual void	buildMergeLaneMasks (MachineBasicBlock &MBB, MachineBasicBlock::iterator I, const DebugLoc &DL, Register DstReg, Register PrevReg, Register CurReg)=0
virtual void	constrainAsLaneMask (Incoming &In)=0

Protected Attributes
bool	IsWave32 = false
MachineFunction *	MF = nullptr
MachineDominatorTree *	DT = nullptr
MachinePostDominatorTree *	PDT = nullptr
MachineRegisterInfo *	MRI = nullptr
const GCNSubtarget *	ST = nullptr
const SIInstrInfo *	TII = nullptr
MachineRegisterInfo::VRegAttrs	LaneMaskRegAttrs
const AMDGPU::LaneMaskConstants *	LMC = nullptr
DenseSet< Register >	PhiRegisters

Detailed Description

Definition at line 39 of file SILowerI1Copies.h.

Constructor & Destructor Documentation

PhiLoweringHelper()

PhiLoweringHelper::PhiLoweringHelper	(	MachineFunction *	MF,
		MachineDominatorTree *	DT,
		MachinePostDominatorTree *	PDT )

Definition at line 442 of file SILowerI1Copies.cpp.

References DT, llvm::get(), LMC, MF, MRI, PDT, ST, and TII.

~PhiLoweringHelper()

virtual llvm::PhiLoweringHelper::~PhiLoweringHelper ( )

virtualdefault

Member Function Documentation

buildMergeLaneMasks()

virtual void llvm::PhiLoweringHelper::buildMergeLaneMasks ( MachineBasicBlock & MBB, MachineBasicBlock::iterator I, const DebugLoc & DL, Register DstReg, Register PrevReg, Register CurReg )

pure virtual

References DL, I, and MBB.

Referenced by lowerPhis().

collectIncomingValuesFromPhi()

virtual void llvm::PhiLoweringHelper::collectIncomingValuesFromPhi ( const MachineInstr * MI, SmallVectorImpl< Incoming > & Incomings ) const

pure virtual

References MI.

Referenced by lowerPhis().

constrainAsLaneMask()

virtual void llvm::PhiLoweringHelper::constrainAsLaneMask ( Incoming & In )

pure virtual

Referenced by lowerPhis().

getCandidatesForLowering()

virtual void llvm::PhiLoweringHelper::getCandidatesForLowering ( SmallVectorImpl< MachineInstr * > & Vreg1Phis ) const

pure virtual

Referenced by lowerPhis().

getSaluInsertionAtEnd()

MachineBasicBlock::iterator PhiLoweringHelper::getSaluInsertionAtEnd

(

MachineBasicBlock &

MBB

)

const

Return a point at the end of the given MBB to insert SALU instructions for lane mask calculation.

Take terminators and SCC into account.

Definition at line 697 of file SILowerI1Copies.cpp.

References I, instrDefsUsesSCC(), llvm_unreachable, and MBB.

Referenced by lowerPhis().

initializeLaneMaskRegisterAttributes() [1/2]

void llvm::PhiLoweringHelper::initializeLaneMaskRegisterAttributes ( MachineRegisterInfo::VRegAttrs Attrs )

inline

Definition at line 71 of file SILowerI1Copies.h.

References LaneMaskRegAttrs.

initializeLaneMaskRegisterAttributes() [2/2]

void llvm::PhiLoweringHelper::initializeLaneMaskRegisterAttributes ( Register LaneMask )

inline

Definition at line 66 of file SILowerI1Copies.h.

References LaneMaskRegAttrs, and MRI.

Referenced by lowerPhis().

isConstantLaneMask()

bool PhiLoweringHelper::isConstantLaneMask	(	Register	Reg,
		bool &	Val ) const

Definition at line 644 of file SILowerI1Copies.cpp.

References isLaneMaskReg(), LMC, MI, and MRI.

isLaneMaskReg()

bool llvm::PhiLoweringHelper::isLaneMaskReg ( Register Reg ) const

inline

Definition at line 75 of file SILowerI1Copies.h.

References MRI, Reg, ST, and TII.

Referenced by isConstantLaneMask().

lowerPhis()

bool PhiLoweringHelper::lowerPhis

(

)

Definition at line 452 of file SILowerI1Copies.cpp.

References llvm::SSAUpdater::AddAvailableValue(), llvm::Incoming::Block, buildMergeLaneMasks(), llvm::SmallVectorImpl< T >::clear(), collectIncomingValuesFromPhi(), constrainAsLaneMask(), llvm::createLaneMaskReg(), llvm::dbgs(), DT, llvm::SmallVectorTemplateCommon< T, typename >::empty(), getCandidatesForLowering(), getSaluInsertionAtEnd(), llvm::SSAUpdater::GetValueInMiddleOfBlock(), llvm::SSAUpdater::Initialize(), initializeLaneMaskRegisterAttributes(), insertUndefLaneMask(), llvm::Register::isValid(), LaneMaskRegAttrs, LLVM_DEBUG, markAsLaneMask(), MBB, MF, MI, MRI, PDT, PhiRegisters, llvm::Incoming::Reg, replaceDstReg(), llvm::sort(), TII, and llvm::Incoming::UpdatedReg.

markAsLaneMask()

virtual void llvm::PhiLoweringHelper::markAsLaneMask ( Register DstReg ) const

pure virtual

Referenced by lowerPhis().

replaceDstReg()

virtual void llvm::PhiLoweringHelper::replaceDstReg ( Register NewReg, Register OldReg, MachineBasicBlock * MBB )

pure virtual

References MBB.

Referenced by lowerPhis().

Member Data Documentation

DT

MachineDominatorTree* llvm::PhiLoweringHelper::DT = nullptr

protected

Definition at line 48 of file SILowerI1Copies.h.

Referenced by lowerPhis(), and PhiLoweringHelper().

IsWave32

bool llvm::PhiLoweringHelper::IsWave32 = false

protected

Definition at line 46 of file SILowerI1Copies.h.

LaneMaskRegAttrs

MachineRegisterInfo::VRegAttrs llvm::PhiLoweringHelper::LaneMaskRegAttrs

protected

Definition at line 53 of file SILowerI1Copies.h.

Referenced by initializeLaneMaskRegisterAttributes(), initializeLaneMaskRegisterAttributes(), and lowerPhis().

LMC

const AMDGPU::LaneMaskConstants* llvm::PhiLoweringHelper::LMC = nullptr

protected

Definition at line 54 of file SILowerI1Copies.h.

Referenced by isConstantLaneMask(), and PhiLoweringHelper().

MF

MachineFunction* llvm::PhiLoweringHelper::MF = nullptr

protected

Definition at line 47 of file SILowerI1Copies.h.

Referenced by lowerPhis(), and PhiLoweringHelper().

MRI

MachineRegisterInfo* llvm::PhiLoweringHelper::MRI = nullptr

protected

Definition at line 50 of file SILowerI1Copies.h.

Referenced by initializeLaneMaskRegisterAttributes(), isConstantLaneMask(), isLaneMaskReg(), lowerPhis(), and PhiLoweringHelper().

PDT

MachinePostDominatorTree* llvm::PhiLoweringHelper::PDT = nullptr

protected

Definition at line 49 of file SILowerI1Copies.h.

Referenced by lowerPhis(), and PhiLoweringHelper().

PhiRegisters

DenseSet<Register> llvm::PhiLoweringHelper::PhiRegisters

protected

Definition at line 57 of file SILowerI1Copies.h.

Referenced by lowerPhis().

ST

const GCNSubtarget* llvm::PhiLoweringHelper::ST = nullptr

protected

Definition at line 51 of file SILowerI1Copies.h.

Referenced by isLaneMaskReg(), and PhiLoweringHelper().

TII

const SIInstrInfo* llvm::PhiLoweringHelper::TII = nullptr

protected

Definition at line 52 of file SILowerI1Copies.h.

Referenced by isLaneMaskReg(), lowerPhis(), and PhiLoweringHelper().

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

• lib/Target/AMDGPU/SILowerI1Copies.h
• lib/Target/AMDGPU/SILowerI1Copies.cpp