LLVM  6.0.0svn
Public Member Functions | List of all members
llvm::SIRegisterInfo Class Referencefinal

#include "Target/AMDGPU/SIRegisterInfo.h"

Inheritance diagram for llvm::SIRegisterInfo:
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Collaboration diagram for llvm::SIRegisterInfo:
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Public Member Functions

 SIRegisterInfo (const SISubtarget &ST)
 
bool spillSGPRToVGPR () const
 
bool spillSGPRToSMEM () const
 
unsigned reservedPrivateSegmentBufferReg (const MachineFunction &MF) const
 Return the end register initially reserved for the scratch buffer in case spilling is needed. More...
 
unsigned reservedPrivateSegmentWaveByteOffsetReg (const MachineFunction &MF) const
 Return the end register initially reserved for the scratch wave offset in case spilling is needed. More...
 
unsigned reservedStackPtrOffsetReg (const MachineFunction &MF) const
 
BitVector getReservedRegs (const MachineFunction &MF) const override
 
const MCPhysReggetCalleeSavedRegs (const MachineFunction *MF) const override
 
const MCPhysReggetCalleeSavedRegsViaCopy (const MachineFunction *MF) const
 
const uint32_tgetCallPreservedMask (const MachineFunction &MF, CallingConv::ID) const override
 
unsigned getCSRFirstUseCost () const override
 
unsigned getFrameRegister (const MachineFunction &MF) const override
 
bool requiresRegisterScavenging (const MachineFunction &Fn) const override
 
bool requiresFrameIndexScavenging (const MachineFunction &MF) const override
 
bool requiresFrameIndexReplacementScavenging (const MachineFunction &MF) const override
 
bool requiresVirtualBaseRegisters (const MachineFunction &Fn) const override
 
bool trackLivenessAfterRegAlloc (const MachineFunction &MF) const override
 
int64_t getMUBUFInstrOffset (const MachineInstr *MI) const
 
int64_t getFrameIndexInstrOffset (const MachineInstr *MI, int Idx) const override
 
bool needsFrameBaseReg (MachineInstr *MI, int64_t Offset) const override
 
void materializeFrameBaseRegister (MachineBasicBlock *MBB, unsigned BaseReg, int FrameIdx, int64_t Offset) const override
 
void resolveFrameIndex (MachineInstr &MI, unsigned BaseReg, int64_t Offset) const override
 
bool isFrameOffsetLegal (const MachineInstr *MI, unsigned BaseReg, int64_t Offset) const override
 
const TargetRegisterClassgetPointerRegClass (const MachineFunction &MF, unsigned Kind=0) const override
 
bool spillSGPR (MachineBasicBlock::iterator MI, int FI, RegScavenger *RS, bool OnlyToVGPR=false) const
 If OnlyToVGPR is true, this will only succeed if this. More...
 
bool restoreSGPR (MachineBasicBlock::iterator MI, int FI, RegScavenger *RS, bool OnlyToVGPR=false) const
 
void eliminateFrameIndex (MachineBasicBlock::iterator MI, int SPAdj, unsigned FIOperandNum, RegScavenger *RS) const override
 
bool eliminateSGPRToVGPRSpillFrameIndex (MachineBasicBlock::iterator MI, int FI, RegScavenger *RS) const
 Special case of eliminateFrameIndex. More...
 
StringRef getRegAsmName (unsigned Reg) const override
 
unsigned getHWRegIndex (unsigned Reg) const
 
const TargetRegisterClassgetPhysRegClass (unsigned Reg) const
 Return the 'base' register class for this register. More...
 
bool isSGPRClass (const TargetRegisterClass *RC) const
 
bool isSGPRClassID (unsigned RCID) const
 
bool isSGPRReg (const MachineRegisterInfo &MRI, unsigned Reg) const
 
bool hasVGPRs (const TargetRegisterClass *RC) const
 
const TargetRegisterClassgetEquivalentVGPRClass (const TargetRegisterClass *SRC) const
 
const TargetRegisterClassgetEquivalentSGPRClass (const TargetRegisterClass *VRC) const
 
const TargetRegisterClassgetSubRegClass (const TargetRegisterClass *RC, unsigned SubIdx) const
 
bool shouldRewriteCopySrc (const TargetRegisterClass *DefRC, unsigned DefSubReg, const TargetRegisterClass *SrcRC, unsigned SrcSubReg) const override
 
bool opCanUseLiteralConstant (unsigned OpType) const
 
bool opCanUseInlineConstant (unsigned OpType) const
 
unsigned findUnusedRegister (const MachineRegisterInfo &MRI, const TargetRegisterClass *RC, const MachineFunction &MF) const
 Returns a register that is not used at any point in the function. More...
 
unsigned getSGPRPressureSet () const
 
unsigned getVGPRPressureSet () const
 
const TargetRegisterClassgetRegClassForReg (const MachineRegisterInfo &MRI, unsigned Reg) const
 
bool isVGPR (const MachineRegisterInfo &MRI, unsigned Reg) const
 
bool isSGPRPressureSet (unsigned SetID) const
 
bool isVGPRPressureSet (unsigned SetID) const
 
ArrayRef< int16_t > getRegSplitParts (const TargetRegisterClass *RC, unsigned EltSize) const
 
bool shouldCoalesce (MachineInstr *MI, const TargetRegisterClass *SrcRC, unsigned SubReg, const TargetRegisterClass *DstRC, unsigned DstSubReg, const TargetRegisterClass *NewRC, LiveIntervals &LIS) const override
 
unsigned getRegPressureLimit (const TargetRegisterClass *RC, MachineFunction &MF) const override
 
unsigned getRegPressureSetLimit (const MachineFunction &MF, unsigned Idx) const override
 
const int * getRegUnitPressureSets (unsigned RegUnit) const override
 
unsigned getReturnAddressReg (const MachineFunction &MF) const
 
- Public Member Functions inherited from llvm::AMDGPURegisterInfo
 AMDGPURegisterInfo ()
 
unsigned getSubRegFromChannel (unsigned Channel) const
 

Detailed Description

Definition at line 30 of file SIRegisterInfo.h.

Constructor & Destructor Documentation

◆ SIRegisterInfo()

SIRegisterInfo::SIRegisterInfo ( const SISubtarget ST)

Member Function Documentation

◆ eliminateFrameIndex()

void SIRegisterInfo::eliminateFrameIndex ( MachineBasicBlock::iterator  MI,
int  SPAdj,
unsigned  FIOperandNum,
RegScavenger RS 
) const
override

◆ eliminateSGPRToVGPRSpillFrameIndex()

bool SIRegisterInfo::eliminateSGPRToVGPRSpillFrameIndex ( MachineBasicBlock::iterator  MI,
int  FI,
RegScavenger RS 
) const

Special case of eliminateFrameIndex.

Returns true if the SGPR was spilled to a VGPR and the stack slot can be safely eliminated when all other users are handled.

Definition at line 922 of file SIRegisterInfo.cpp.

References llvm_unreachable, restoreSGPR(), and spillSGPR().

Referenced by getCSRFirstUseCost(), and llvm::SIFrameLowering::processFunctionBeforeFrameFinalized().

◆ findUnusedRegister()

unsigned SIRegisterInfo::findUnusedRegister ( const MachineRegisterInfo MRI,
const TargetRegisterClass RC,
const MachineFunction MF 
) const

Returns a register that is not used at any point in the function.

If all registers are used, then this function will return

Definition at line 1345 of file SIRegisterInfo.cpp.

References llvm::MachineRegisterInfo::isAllocatable(), and llvm::MachineRegisterInfo::isPhysRegUsed().

Referenced by llvm::SIInstrInfo::calculateLDSSpillAddress(), and opCanUseInlineConstant().

◆ getCalleeSavedRegs()

const MCPhysReg * SIRegisterInfo::getCalleeSavedRegs ( const MachineFunction MF) const
override

◆ getCalleeSavedRegsViaCopy()

const MCPhysReg * SIRegisterInfo::getCalleeSavedRegsViaCopy ( const MachineFunction MF) const

◆ getCallPreservedMask()

const uint32_t * SIRegisterInfo::getCallPreservedMask ( const MachineFunction MF,
CallingConv::ID  CC 
) const
override

◆ getCSRFirstUseCost()

unsigned llvm::SIRegisterInfo::getCSRFirstUseCost ( ) const
inlineoverride

◆ getEquivalentSGPRClass()

const TargetRegisterClass * SIRegisterInfo::getEquivalentSGPRClass ( const TargetRegisterClass VRC) const
Returns
A SGPR reg class with the same width as SRC

Definition at line 1259 of file SIRegisterInfo.cpp.

References llvm_unreachable.

Referenced by isSGPRReg(), llvm::SIInstrInfo::readlaneVGPRToSGPR(), and tryChangeVGPRtoSGPRinCopy().

◆ getEquivalentVGPRClass()

const TargetRegisterClass * SIRegisterInfo::getEquivalentVGPRClass ( const TargetRegisterClass SRC) const

◆ getFrameIndexInstrOffset()

int64_t SIRegisterInfo::getFrameIndexInstrOffset ( const MachineInstr MI,
int  Idx 
) const
override

◆ getFrameRegister()

unsigned SIRegisterInfo::getFrameRegister ( const MachineFunction MF) const
override

◆ getHWRegIndex()

unsigned llvm::SIRegisterInfo::getHWRegIndex ( unsigned  Reg) const
inline

Definition at line 125 of file SIRegisterInfo.h.

References getPhysRegClass().

Referenced by llvm::SIInstrInfo::copyPhysReg(), and getNumExtraSGPRs().

◆ getMUBUFInstrOffset()

int64_t SIRegisterInfo::getMUBUFInstrOffset ( const MachineInstr MI) const

◆ getPhysRegClass()

const TargetRegisterClass * SIRegisterInfo::getPhysRegClass ( unsigned  Reg) const

Return the 'base' register class for this register.

e.g. SGPR0 => SReg_32, VGPR => VGPR_32 SGPR0_SGPR1 -> SReg_32, etc.

Definition at line 1189 of file SIRegisterInfo.cpp.

References assert(), and llvm::TargetRegisterInfo::isVirtualRegister().

Referenced by llvm::SIInstrInfo::copyPhysReg(), llvm::createR600ISelDag(), getCopyRegClasses(), getHWRegIndex(), llvm::SIInstrInfo::getOpRegClass(), getRegClassForReg(), llvm::SIInstrInfo::isLegalRegOperand(), isSGPRReg(), isVGPR(), restoreSGPR(), and spillSGPR().

◆ getPointerRegClass()

const TargetRegisterClass * SIRegisterInfo::getPointerRegClass ( const MachineFunction MF,
unsigned  Kind = 0 
) const
override

Definition at line 383 of file SIRegisterInfo.cpp.

Referenced by getCSRFirstUseCost().

◆ getRegAsmName()

StringRef SIRegisterInfo::getRegAsmName ( unsigned  Reg) const
override

Definition at line 1127 of file SIRegisterInfo.cpp.

References llvm::TargetRegisterInfo::getRegAsmName(), and REG_RANGE.

Referenced by getCSRFirstUseCost().

◆ getRegClassForReg()

const TargetRegisterClass * SIRegisterInfo::getRegClassForReg ( const MachineRegisterInfo MRI,
unsigned  Reg 
) const

◆ getRegPressureLimit()

unsigned SIRegisterInfo::getRegPressureLimit ( const TargetRegisterClass RC,
MachineFunction MF 
) const
override

◆ getRegPressureSetLimit()

unsigned SIRegisterInfo::getRegPressureSetLimit ( const MachineFunction MF,
unsigned  Idx 
) const
override

◆ getRegSplitParts()

ArrayRef< int16_t > SIRegisterInfo::getRegSplitParts ( const TargetRegisterClass RC,
unsigned  EltSize 
) const

◆ getRegUnitPressureSets()

const int * SIRegisterInfo::getRegUnitPressureSets ( unsigned  RegUnit) const
override

Definition at line 1524 of file SIRegisterInfo.cpp.

References llvm::Empty.

Referenced by hasPressureSet(), isVGPRPressureSet(), and SIRegisterInfo().

◆ getReservedRegs()

BitVector SIRegisterInfo::getReservedRegs ( const MachineFunction MF) const
override

◆ getReturnAddressReg()

unsigned llvm::SIRegisterInfo::getReturnAddressReg ( const MachineFunction MF) const
inline

◆ getSGPRPressureSet()

unsigned llvm::SIRegisterInfo::getSGPRPressureSet ( ) const
inline

◆ getSubRegClass()

const TargetRegisterClass * SIRegisterInfo::getSubRegClass ( const TargetRegisterClass RC,
unsigned  SubIdx 
) const
Returns
The register class that is used for a sub-register of RC for the given SubIdx. If SubIdx equals NoSubRegister, RC will be returned.

Definition at line 1277 of file SIRegisterInfo.cpp.

References isSGPRClass(), and llvm_unreachable.

Referenced by foldVGPRCopyIntoRegSequence(), llvm::SIInstrInfo::isLegalRegOperand(), isSGPRReg(), and llvm::SIInstrInfo::moveToVALU().

◆ getVGPRPressureSet()

unsigned llvm::SIRegisterInfo::getVGPRPressureSet ( ) const
inline

◆ hasVGPRs()

bool SIRegisterInfo::hasVGPRs ( const TargetRegisterClass RC) const

◆ isFrameOffsetLegal()

bool SIRegisterInfo::isFrameOffsetLegal ( const MachineInstr MI,
unsigned  BaseReg,
int64_t  Offset 
) const
override

Definition at line 372 of file SIRegisterInfo.cpp.

References getMUBUFInstrOffset(), and llvm::SIInstrInfo::isMUBUF().

Referenced by getCSRFirstUseCost().

◆ isSGPRClass()

bool llvm::SIRegisterInfo::isSGPRClass ( const TargetRegisterClass RC) const
inline

◆ isSGPRClassID()

bool llvm::SIRegisterInfo::isSGPRClassID ( unsigned  RCID) const
inline
Returns
true if this class ID contains only SGPR registers

Definition at line 139 of file SIRegisterInfo.h.

References getRegClass(), and isSGPRClass().

◆ isSGPRPressureSet()

bool llvm::SIRegisterInfo::isSGPRPressureSet ( unsigned  SetID) const
inline

Definition at line 201 of file SIRegisterInfo.h.

References llvm::BitVector::test().

Referenced by SIRegisterInfo().

◆ isSGPRReg()

bool llvm::SIRegisterInfo::isSGPRReg ( const MachineRegisterInfo MRI,
unsigned  Reg 
) const
inline

◆ isVGPR()

bool SIRegisterInfo::isVGPR ( const MachineRegisterInfo MRI,
unsigned  Reg 
) const

◆ isVGPRPressureSet()

bool llvm::SIRegisterInfo::isVGPRPressureSet ( unsigned  SetID) const
inline

◆ materializeFrameBaseRegister()

void SIRegisterInfo::materializeFrameBaseRegister ( MachineBasicBlock MBB,
unsigned  BaseReg,
int  FrameIdx,
int64_t  Offset 
) const
override

◆ needsFrameBaseReg()

bool SIRegisterInfo::needsFrameBaseReg ( MachineInstr MI,
int64_t  Offset 
) const
override

Definition at line 291 of file SIRegisterInfo.cpp.

References getMUBUFInstrOffset(), and llvm::MachineInstr::mayLoadOrStore().

Referenced by getCSRFirstUseCost().

◆ opCanUseInlineConstant()

bool llvm::SIRegisterInfo::opCanUseInlineConstant ( unsigned  OpType) const
inline
Returns
True if operands defined with this operand type can accept an inline constant. i.e. An integer value in the range (-16, 64) or -4.0f, -2.0f, -1.0f, -0.5f, 0.0f, 0.5f, 1.0f, 2.0f, 4.0f.

Definition at line 185 of file SIRegisterInfo.h.

References findUnusedRegister(), MRI, llvm::AMDGPU::OPERAND_SRC_FIRST, and llvm::AMDGPU::OPERAND_SRC_LAST.

Referenced by llvm::SIInstrInfo::isImmOperandLegal().

◆ opCanUseLiteralConstant()

bool llvm::SIRegisterInfo::opCanUseLiteralConstant ( unsigned  OpType) const
inline
Returns
True if operands defined with this operand type can accept a literal constant (i.e. any 32-bit immediate).

Definition at line 176 of file SIRegisterInfo.h.

References llvm::AMDGPU::OPERAND_REG_IMM_FIRST, and llvm::AMDGPU::OPERAND_REG_IMM_LAST.

Referenced by llvm::SIInstrInfo::isImmOperandLegal().

◆ requiresFrameIndexReplacementScavenging()

bool SIRegisterInfo::requiresFrameIndexReplacementScavenging ( const MachineFunction MF) const
override

◆ requiresFrameIndexScavenging()

bool SIRegisterInfo::requiresFrameIndexScavenging ( const MachineFunction MF) const
override

◆ requiresRegisterScavenging()

bool SIRegisterInfo::requiresRegisterScavenging ( const MachineFunction Fn) const
override

◆ requiresVirtualBaseRegisters()

bool SIRegisterInfo::requiresVirtualBaseRegisters ( const MachineFunction Fn) const
override

Definition at line 260 of file SIRegisterInfo.cpp.

Referenced by getCSRFirstUseCost().

◆ reservedPrivateSegmentBufferReg()

unsigned SIRegisterInfo::reservedPrivateSegmentBufferReg ( const MachineFunction MF) const

Return the end register initially reserved for the scratch buffer in case spilling is needed.

Definition at line 111 of file SIRegisterInfo.cpp.

References llvm::alignDown(), llvm::SISubtarget::getMaxNumSGPRs(), llvm::MachineFunction::getSubtarget(), and llvm::ARM_MB::ST.

Referenced by getAllSGPRs(), reservePrivateMemoryRegs(), and spillSGPRToSMEM().

◆ reservedPrivateSegmentWaveByteOffsetReg()

unsigned SIRegisterInfo::reservedPrivateSegmentWaveByteOffsetReg ( const MachineFunction MF) const

Return the end register initially reserved for the scratch wave offset in case spilling is needed.

Definition at line 137 of file SIRegisterInfo.cpp.

References findPrivateSegmentWaveByteOffsetRegIndex(), llvm::SISubtarget::getMaxNumSGPRs(), llvm::MachineFunction::getSubtarget(), and llvm::ARM_MB::ST.

Referenced by getAllSGPRs(), reservePrivateMemoryRegs(), and spillSGPRToSMEM().

◆ reservedStackPtrOffsetReg()

unsigned SIRegisterInfo::reservedStackPtrOffsetReg ( const MachineFunction MF) const

Definition at line 144 of file SIRegisterInfo.cpp.

Referenced by spillSGPRToSMEM().

◆ resolveFrameIndex()

void SIRegisterInfo::resolveFrameIndex ( MachineInstr MI,
unsigned  BaseReg,
int64_t  Offset 
) const
override

◆ restoreSGPR()

bool SIRegisterInfo::restoreSGPR ( MachineBasicBlock::iterator  MI,
int  FI,
RegScavenger RS,
bool  OnlyToVGPR = false 
) const

◆ shouldCoalesce()

bool SIRegisterInfo::shouldCoalesce ( MachineInstr MI,
const TargetRegisterClass SrcRC,
unsigned  SubReg,
const TargetRegisterClass DstRC,
unsigned  DstSubReg,
const TargetRegisterClass NewRC,
LiveIntervals LIS 
) const
override

Definition at line 1472 of file SIRegisterInfo.cpp.

Referenced by isVGPRPressureSet().

◆ shouldRewriteCopySrc()

bool SIRegisterInfo::shouldRewriteCopySrc ( const TargetRegisterClass DefRC,
unsigned  DefSubReg,
const TargetRegisterClass SrcRC,
unsigned  SrcSubReg 
) const
override

Definition at line 1317 of file SIRegisterInfo.cpp.

Referenced by isSGPRReg().

◆ spillSGPR()

bool SIRegisterInfo::spillSGPR ( MachineBasicBlock::iterator  MI,
int  FI,
RegScavenger RS,
bool  OnlyToVGPR = false 
) const

If OnlyToVGPR is true, this will only succeed if this.

Definition at line 613 of file SIRegisterInfo.cpp.

References llvm::MachineInstrBuilder::addFrameIndex(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addMemOperand(), llvm::MachineInstrBuilder::addReg(), llvm::SIMachineFunctionInfo::addToSpilledSGPRs(), llvm::AMDGPU::HSAMD::Kernel::Arg::Key::Align, assert(), llvm::BuildMI(), llvm::MachineRegisterInfo::createVirtualRegister(), llvm::ArrayRef< T >::empty(), llvm::MDNode::get(), llvm::MachinePointerInfo::getFixedStack(), llvm::MachineFunction::getFrameInfo(), llvm::SIMachineFunctionInfo::getFrameOffsetReg(), llvm::MachineFunction::getInfo(), llvm::SISubtarget::getInstrInfo(), llvm::getKillRegState(), llvm::MachineFunction::getMachineMemOperand(), llvm::MachineFrameInfo::getObjectAlignment(), llvm::MachineFrameInfo::getObjectOffset(), llvm::MachineBasicBlock::getParent(), getPhysRegClass(), llvm::MachineFunction::getRegInfo(), getRegSplitParts(), llvm::SIMachineFunctionInfo::getScratchRSrcReg(), llvm::SIMachineFunctionInfo::getSGPRToVGPRSpills(), getSpillEltSize(), llvm::MachineFunction::getSubtarget(), llvm::AMDGPUSubtarget::getWavefrontSize(), llvm::RegState::Implicit, llvm::RegScavenger::isRegUsed(), isSGPRClass(), llvm::RegState::Kill, llvm::SIMachineFunctionInfo::SpilledReg::Lane, llvm::MinAlign(), llvm::MachineMemOperand::MOStore, MRI, llvm::ArrayRef< T >::size(), spillSGPRToSMEM(), llvm::ARM_MB::ST, SubReg, TII, and llvm::SIMachineFunctionInfo::SpilledReg::VGPR.

Referenced by eliminateFrameIndex(), eliminateSGPRToVGPRSpillFrameIndex(), and getCSRFirstUseCost().

◆ spillSGPRToSMEM()

bool llvm::SIRegisterInfo::spillSGPRToSMEM ( ) const
inline

◆ spillSGPRToVGPR()

bool llvm::SIRegisterInfo::spillSGPRToVGPR ( ) const
inline

◆ trackLivenessAfterRegAlloc()

bool SIRegisterInfo::trackLivenessAfterRegAlloc ( const MachineFunction MF) const
override

Definition at line 266 of file SIRegisterInfo.cpp.

Referenced by getCSRFirstUseCost().


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