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Public Types | Public Member Functions | Static Public Member Functions | Protected Attributes | List of all members
llvm::AMDGPUSubtarget Class Referenceabstract

#include "Target/AMDGPU/AMDGPUSubtarget.h"

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Public Types

enum  Generation {
  INVALID = 0, R600 = 1, R700 = 2, EVERGREEN = 3,
  NORTHERN_ISLANDS = 4, SOUTHERN_ISLANDS = 5, SEA_ISLANDS = 6, VOLCANIC_ISLANDS = 7,
  GFX9 = 8, GFX10 = 9, GFX11 = 10
}
 

Public Member Functions

 AMDGPUSubtarget (const Triple &TT)
 
std::pair< unsigned, unsigned > getDefaultFlatWorkGroupSize (CallingConv::ID CC) const
 
std::pair< unsigned, unsigned > getFlatWorkGroupSizes (const Function &F) const
 
std::pair< unsigned, unsigned > getWavesPerEU (const Function &F) const
 
std::pair< unsigned, unsigned > getWavesPerEU (const Function &F, std::pair< unsigned, unsigned > FlatWorkGroupSizes) const
 Overload which uses the specified values for the flat work group sizes, rather than querying the function itself. More...
 
unsigned getMaxLocalMemSizeWithWaveCount (unsigned WaveCount, const Function &) const
 Return the amount of LDS that can be used that will not restrict the occupancy lower than WaveCount. More...
 
unsigned getOccupancyWithLocalMemSize (uint32_t Bytes, const Function &) const
 Inverse of getMaxLocalMemWithWaveCount. More...
 
unsigned getOccupancyWithLocalMemSize (const MachineFunction &MF) const
 
bool isAmdHsaOS () const
 
bool isAmdPalOS () const
 
bool isMesa3DOS () const
 
bool isMesaKernel (const Function &F) const
 
bool isAmdHsaOrMesa (const Function &F) const
 
bool isGCN () const
 
bool isGCN3Encoding () const
 
bool has16BitInsts () const
 
bool hasTrue16BitInsts () const
 
bool hasMadMixInsts () const
 
bool hasMadMacF32Insts () const
 
bool hasDsSrc2Insts () const
 
bool hasSDWA () const
 
bool hasVOP3PInsts () const
 
bool hasMulI24 () const
 
bool hasMulU24 () const
 
bool hasSMulHi () const
 
bool hasInv2PiInlineImm () const
 
bool hasFminFmaxLegacy () const
 
bool hasTrigReducedRange () const
 
bool isPromoteAllocaEnabled () const
 
unsigned getWavefrontSize () const
 
unsigned getWavefrontSizeLog2 () const
 
unsigned getLocalMemorySize () const
 
Align getAlignmentForImplicitArgPtr () const
 
unsigned getExplicitKernelArgOffset (const Function &F) const
 Returns the offset in bytes from the start of the input buffer of the first explicit kernel argument. More...
 
virtual unsigned getMaxWorkGroupsPerCU (unsigned FlatWorkGroupSize) const =0
 
virtual unsigned getMinFlatWorkGroupSize () const =0
 
virtual unsigned getMaxFlatWorkGroupSize () const =0
 
virtual unsigned getWavesPerEUForWorkGroup (unsigned FlatWorkGroupSize) const =0
 
virtual unsigned getMinWavesPerEU () const =0
 
unsigned getMaxWavesPerEU () const
 
unsigned getMaxWorkitemID (const Function &Kernel, unsigned Dimension) const
 Return the maximum workitem ID value in the function, for the given (0, 1, 2) dimension. More...
 
bool makeLIDRangeMetadata (Instruction *I) const
 Creates value range metadata on an workitemid.* intrinsic call or load. More...
 
unsigned getImplicitArgNumBytes (const Function &F) const
 
uint64_t getExplicitKernArgSize (const Function &F, Align &MaxAlign) const
 
unsigned getKernArgSegmentSize (const Function &F, Align &MaxAlign) const
 
AMDGPUDwarfFlavour getAMDGPUDwarfFlavour () const
 
virtual ~AMDGPUSubtarget ()=default
 

Static Public Member Functions

static const AMDGPUSubtargetget (const MachineFunction &MF)
 
static const AMDGPUSubtargetget (const TargetMachine &TM, const Function &F)
 

Protected Attributes

bool GCN3Encoding = false
 
bool Has16BitInsts = false
 
bool HasTrue16BitInsts = false
 
bool HasMadMixInsts = false
 
bool HasMadMacF32Insts = false
 
bool HasDsSrc2Insts = false
 
bool HasSDWA = false
 
bool HasVOP3PInsts = false
 
bool HasMulI24 = true
 
bool HasMulU24 = true
 
bool HasSMulHi = false
 
bool HasInv2PiInlineImm = false
 
bool HasFminFmaxLegacy = true
 
bool EnablePromoteAlloca = false
 
bool HasTrigReducedRange = false
 
unsigned MaxWavesPerEU = 10
 
unsigned LocalMemorySize = 0
 
char WavefrontSizeLog2 = 0
 

Detailed Description

Definition at line 29 of file AMDGPUSubtarget.h.

Member Enumeration Documentation

◆ Generation

Enumerator
INVALID 
R600 
R700 
EVERGREEN 
NORTHERN_ISLANDS 
SOUTHERN_ISLANDS 
SEA_ISLANDS 
VOLCANIC_ISLANDS 
GFX9 
GFX10 
GFX11 

Definition at line 31 of file AMDGPUSubtarget.h.

Constructor & Destructor Documentation

◆ AMDGPUSubtarget()

AMDGPUSubtarget::AMDGPUSubtarget ( const Triple TT)

Definition at line 157 of file AMDGPUSubtarget.cpp.

◆ ~AMDGPUSubtarget()

virtual llvm::AMDGPUSubtarget::~AMDGPUSubtarget ( )
virtualdefault

Member Function Documentation

◆ get() [1/2]

const AMDGPUSubtarget & AMDGPUSubtarget::get ( const MachineFunction MF)
static

◆ get() [2/2]

const AMDGPUSubtarget & AMDGPUSubtarget::get ( const TargetMachine TM,
const Function F 
)
static

Definition at line 979 of file AMDGPUSubtarget.cpp.

References llvm::Triple::amdgcn, F, and TM.

◆ getAlignmentForImplicitArgPtr()

Align llvm::AMDGPUSubtarget::getAlignmentForImplicitArgPtr ( ) const
inline

Definition at line 212 of file AMDGPUSubtarget.h.

References Align, and isAmdHsaOS().

Referenced by getKernArgSegmentSize().

◆ getAMDGPUDwarfFlavour()

AMDGPUDwarfFlavour AMDGPUSubtarget::getAMDGPUDwarfFlavour ( ) const
Returns
Corresponding DWARF register number mapping flavour for the WavefrontSize.

Definition at line 566 of file AMDGPUSubtarget.cpp.

References getWavefrontSize(), llvm::Wave32, and llvm::Wave64.

◆ getDefaultFlatWorkGroupSize()

std::pair< unsigned, unsigned > AMDGPUSubtarget::getDefaultFlatWorkGroupSize ( CallingConv::ID  CC) const

◆ getExplicitKernArgSize()

uint64_t AMDGPUSubtarget::getExplicitKernArgSize ( const Function F,
Align MaxAlign 
) const

◆ getExplicitKernelArgOffset()

unsigned llvm::AMDGPUSubtarget::getExplicitKernelArgOffset ( const Function F) const
inline

Returns the offset in bytes from the start of the input buffer of the first explicit kernel argument.

Definition at line 218 of file AMDGPUSubtarget.h.

References llvm::Triple::AMDHSA, llvm::Triple::AMDPAL, llvm::Triple::getOS(), llvm_unreachable, llvm::Triple::Mesa3D, and llvm::Triple::UnknownOS.

Referenced by getKernArgSegmentSize(), and llvm::AMDGPUCallLowering::lowerFormalArgumentsKernel().

◆ getFlatWorkGroupSizes()

std::pair< unsigned, unsigned > AMDGPUSubtarget::getFlatWorkGroupSizes ( const Function F) const
Returns
Subtarget's default pair of minimum/maximum flat work group sizes for function F, or minimum/maximum flat work group sizes explicitly requested using "amdgpu-flat-work-group-size" attribute attached to function F.
Subtarget's default values if explicitly requested values cannot be converted to integer, or violate subtarget's specifications.

Definition at line 372 of file AMDGPUSubtarget.cpp.

References F, getDefaultFlatWorkGroupSize(), llvm::AMDGPU::getIntegerPairAttribute(), getMaxFlatWorkGroupSize(), and getMinFlatWorkGroupSize().

Referenced by getMaxLocalMemSizeWithWaveCount(), getMaxWorkitemID(), getOccupancyWithLocalMemSize(), getWavesPerEU(), and makeLIDRangeMetadata().

◆ getImplicitArgNumBytes()

unsigned AMDGPUSubtarget::getImplicitArgNumBytes ( const Function F) const
Returns
Number of bytes of arguments that are passed to a shader or kernel in addition to the explicit ones declared for the function.

Definition at line 510 of file AMDGPUSubtarget.cpp.

References assert(), F, llvm::AMDGPU::getAmdhsaCodeObjectVersion(), llvm::AMDGPU::getIntegerAttribute(), llvm::AMDGPU::isKernel(), and isMesaKernel().

Referenced by getKernArgSegmentSize().

◆ getKernArgSegmentSize()

unsigned AMDGPUSubtarget::getKernArgSegmentSize ( const Function F,
Align MaxAlign 
) const

◆ getLocalMemorySize()

unsigned llvm::AMDGPUSubtarget::getLocalMemorySize ( ) const
inline

Definition at line 208 of file AMDGPUSubtarget.h.

References LocalMemorySize.

Referenced by getMaxLocalMemSizeWithWaveCount(), and getOccupancyWithLocalMemSize().

◆ getMaxFlatWorkGroupSize()

virtual unsigned llvm::AMDGPUSubtarget::getMaxFlatWorkGroupSize ( ) const
pure virtual
Returns
Maximum flat work group size supported by the subtarget.

Implemented in llvm::GCNSubtarget, and llvm::R600Subtarget.

Referenced by getDefaultFlatWorkGroupSize(), and getFlatWorkGroupSizes().

◆ getMaxLocalMemSizeWithWaveCount()

unsigned AMDGPUSubtarget::getMaxLocalMemSizeWithWaveCount ( unsigned  WaveCount,
const Function F 
) const

Return the amount of LDS that can be used that will not restrict the occupancy lower than WaveCount.

Definition at line 302 of file AMDGPUSubtarget.cpp.

References F, getFlatWorkGroupSizes(), getLocalMemorySize(), getMaxWavesPerEU(), and getMaxWorkGroupsPerCU().

◆ getMaxWavesPerEU()

unsigned llvm::AMDGPUSubtarget::getMaxWavesPerEU ( ) const
inline
Returns
Maximum number of waves per execution unit supported by the subtarget without any kind of limitation.

Definition at line 255 of file AMDGPUSubtarget.h.

References MaxWavesPerEU.

Referenced by llvm::GCNSubtarget::computeOccupancy(), getMaxLocalMemSizeWithWaveCount(), getOccupancyWithLocalMemSize(), llvm::GCNSubtarget::getOccupancyWithNumSGPRs(), llvm::GCNSubtarget::getOccupancyWithNumVGPRs(), and getWavesPerEU().

◆ getMaxWorkGroupsPerCU()

virtual unsigned llvm::AMDGPUSubtarget::getMaxWorkGroupsPerCU ( unsigned  FlatWorkGroupSize) const
pure virtual
Returns
Maximum number of work groups per compute unit supported by the subtarget and limited by given FlatWorkGroupSize.

Implemented in llvm::GCNSubtarget, and llvm::R600Subtarget.

Referenced by getMaxLocalMemSizeWithWaveCount(), and getOccupancyWithLocalMemSize().

◆ getMaxWorkitemID()

unsigned AMDGPUSubtarget::getMaxWorkitemID ( const Function Kernel,
unsigned  Dimension 
) const

Return the maximum workitem ID value in the function, for the given (0, 1, 2) dimension.

Definition at line 440 of file AMDGPUSubtarget.cpp.

References getFlatWorkGroupSizes(), getReqdWorkGroupSize(), and llvm::max().

Referenced by llvm::AMDGPUTargetLowering::computeKnownBitsForTargetNode(), llvm::AMDGPULegalizerInfo::legalizeWorkitemIDIntrinsic(), and llvm::SITargetLowering::passSpecialInputs().

◆ getMinFlatWorkGroupSize()

virtual unsigned llvm::AMDGPUSubtarget::getMinFlatWorkGroupSize ( ) const
pure virtual
Returns
Minimum flat work group size supported by the subtarget.

Implemented in llvm::GCNSubtarget, and llvm::R600Subtarget.

Referenced by getFlatWorkGroupSizes().

◆ getMinWavesPerEU()

virtual unsigned llvm::AMDGPUSubtarget::getMinWavesPerEU ( ) const
pure virtual
Returns
Minimum number of waves per execution unit supported by the subtarget.

Implemented in llvm::GCNSubtarget, and llvm::R600Subtarget.

Referenced by getWavesPerEU().

◆ getOccupancyWithLocalMemSize() [1/2]

unsigned AMDGPUSubtarget::getOccupancyWithLocalMemSize ( const MachineFunction MF) const

◆ getOccupancyWithLocalMemSize() [2/2]

unsigned AMDGPUSubtarget::getOccupancyWithLocalMemSize ( uint32_t  Bytes,
const Function F 
) const

Inverse of getMaxLocalMemWithWaveCount.

Return the maximum wavecount if the given LDS memory size is the only constraint.

Definition at line 315 of file AMDGPUSubtarget.cpp.

References assert(), F, getFlatWorkGroupSizes(), getLocalMemorySize(), getMaxWavesPerEU(), getMaxWorkGroupsPerCU(), getWavefrontSize(), and llvm::min().

Referenced by llvm::GCNSubtarget::computeOccupancy(), getOccupancyWithLocalMemSize(), and llvm::SIRegisterInfo::getRegPressureLimit().

◆ getWavefrontSize()

unsigned llvm::AMDGPUSubtarget::getWavefrontSize ( ) const
inline

◆ getWavefrontSizeLog2()

unsigned llvm::AMDGPUSubtarget::getWavefrontSizeLog2 ( ) const
inline

◆ getWavesPerEU() [1/2]

std::pair<unsigned, unsigned> llvm::AMDGPUSubtarget::getWavesPerEU ( const Function F) const
inline
Returns
Subtarget's default pair of minimum/maximum number of waves per execution unit for function F, or minimum/maximum number of waves per execution unit explicitly requested using "amdgpu-waves-per-eu" attribute attached to function F.
Subtarget's default values if explicitly requested values cannot be converted to integer, violate subtarget's specifications, or are not compatible with minimum/maximum number of waves limited by flat work group size, register usage, and/or lds usage.

Definition at line 96 of file AMDGPUSubtarget.h.

References F, and getFlatWorkGroupSizes().

Referenced by llvm::GCNSubtarget::getMaxNumSGPRs(), and llvm::GCNSubtarget::getMaxNumVGPRs().

◆ getWavesPerEU() [2/2]

std::pair< unsigned, unsigned > AMDGPUSubtarget::getWavesPerEU ( const Function F,
std::pair< unsigned, unsigned >  FlatWorkGroupSizes 
) const

Overload which uses the specified values for the flat work group sizes, rather than querying the function itself.

FlatWorkGroupSizes Should correspond to the function's value for getFlatWorkGroupSizes.

Definition at line 395 of file AMDGPUSubtarget.cpp.

References F, llvm::AMDGPU::getIntegerPairAttribute(), getMaxWavesPerEU(), getMinWavesPerEU(), and getWavesPerEUForWorkGroup().

◆ getWavesPerEUForWorkGroup()

virtual unsigned llvm::AMDGPUSubtarget::getWavesPerEUForWorkGroup ( unsigned  FlatWorkGroupSize) const
pure virtual
Returns
Number of waves per execution unit required to support the given FlatWorkGroupSize.

Implemented in llvm::GCNSubtarget, and llvm::R600Subtarget.

Referenced by getWavesPerEU().

◆ has16BitInsts()

bool llvm::AMDGPUSubtarget::has16BitInsts ( ) const
inline

◆ hasDsSrc2Insts()

bool llvm::AMDGPUSubtarget::hasDsSrc2Insts ( ) const
inline

Definition at line 160 of file AMDGPUSubtarget.h.

References HasDsSrc2Insts.

◆ hasFminFmaxLegacy()

bool llvm::AMDGPUSubtarget::hasFminFmaxLegacy ( ) const
inline

◆ hasInv2PiInlineImm()

bool llvm::AMDGPUSubtarget::hasInv2PiInlineImm ( ) const
inline

◆ hasMadMacF32Insts()

bool llvm::AMDGPUSubtarget::hasMadMacF32Insts ( ) const
inline

◆ hasMadMixInsts()

bool llvm::AMDGPUSubtarget::hasMadMixInsts ( ) const
inline

Definition at line 152 of file AMDGPUSubtarget.h.

References HasMadMixInsts.

Referenced by llvm::SITargetLowering::isFPExtFoldable().

◆ hasMulI24()

bool llvm::AMDGPUSubtarget::hasMulI24 ( ) const
inline

◆ hasMulU24()

bool llvm::AMDGPUSubtarget::hasMulU24 ( ) const
inline

◆ hasSDWA()

bool llvm::AMDGPUSubtarget::hasSDWA ( ) const
inline

◆ hasSMulHi()

bool llvm::AMDGPUSubtarget::hasSMulHi ( ) const
inline

◆ hasTrigReducedRange()

bool llvm::AMDGPUSubtarget::hasTrigReducedRange ( ) const
inline

Definition at line 192 of file AMDGPUSubtarget.h.

References HasTrigReducedRange.

Referenced by llvm::AMDGPULegalizerInfo::legalizeSinCos().

◆ hasTrue16BitInsts()

bool llvm::AMDGPUSubtarget::hasTrue16BitInsts ( ) const
inline

Definition at line 150 of file AMDGPUSubtarget.h.

References HasTrue16BitInsts.

◆ hasVOP3PInsts()

bool llvm::AMDGPUSubtarget::hasVOP3PInsts ( ) const
inline

◆ isAmdHsaOrMesa()

bool llvm::AMDGPUSubtarget::isAmdHsaOrMesa ( const Function F) const
inline

Definition at line 134 of file AMDGPUSubtarget.h.

References F, isAmdHsaOS(), and isMesaKernel().

◆ isAmdHsaOS()

bool llvm::AMDGPUSubtarget::isAmdHsaOS ( ) const
inline

◆ isAmdPalOS()

bool llvm::AMDGPUSubtarget::isAmdPalOS ( ) const
inline

◆ isGCN()

bool llvm::AMDGPUSubtarget::isGCN ( ) const
inline

◆ isGCN3Encoding()

bool llvm::AMDGPUSubtarget::isGCN3Encoding ( ) const
inline

Definition at line 142 of file AMDGPUSubtarget.h.

References GCN3Encoding.

◆ isMesa3DOS()

bool llvm::AMDGPUSubtarget::isMesa3DOS ( ) const
inline

◆ isMesaKernel()

bool AMDGPUSubtarget::isMesaKernel ( const Function F) const

Definition at line 436 of file AMDGPUSubtarget.cpp.

References F, isMesa3DOS(), and llvm::AMDGPU::isShader().

Referenced by getImplicitArgNumBytes(), and isAmdHsaOrMesa().

◆ isPromoteAllocaEnabled()

bool llvm::AMDGPUSubtarget::isPromoteAllocaEnabled ( ) const
inline

Definition at line 196 of file AMDGPUSubtarget.h.

References EnablePromoteAlloca.

◆ makeLIDRangeMetadata()

bool AMDGPUSubtarget::makeLIDRangeMetadata ( Instruction I) const

Creates value range metadata on an workitemid.* intrinsic call or load.

Definition at line 448 of file AMDGPUSubtarget.cpp.

References llvm::MDBuilder::createRange(), F, getFlatWorkGroupSizes(), getReqdWorkGroupSize(), I, if(), LLVM_FALLTHROUGH, and llvm::max().

Member Data Documentation

◆ EnablePromoteAlloca

bool llvm::AMDGPUSubtarget::EnablePromoteAlloca = false
protected

Definition at line 62 of file AMDGPUSubtarget.h.

Referenced by isPromoteAllocaEnabled().

◆ GCN3Encoding

bool llvm::AMDGPUSubtarget::GCN3Encoding = false
protected

Definition at line 49 of file AMDGPUSubtarget.h.

Referenced by isGCN3Encoding().

◆ Has16BitInsts

bool llvm::AMDGPUSubtarget::Has16BitInsts = false
protected

Definition at line 50 of file AMDGPUSubtarget.h.

Referenced by has16BitInsts().

◆ HasDsSrc2Insts

bool llvm::AMDGPUSubtarget::HasDsSrc2Insts = false
protected

Definition at line 54 of file AMDGPUSubtarget.h.

Referenced by hasDsSrc2Insts().

◆ HasFminFmaxLegacy

bool llvm::AMDGPUSubtarget::HasFminFmaxLegacy = true
protected

◆ HasInv2PiInlineImm

bool llvm::AMDGPUSubtarget::HasInv2PiInlineImm = false
protected

Definition at line 60 of file AMDGPUSubtarget.h.

Referenced by hasInv2PiInlineImm().

◆ HasMadMacF32Insts

bool llvm::AMDGPUSubtarget::HasMadMacF32Insts = false
protected

Definition at line 53 of file AMDGPUSubtarget.h.

Referenced by hasMadMacF32Insts().

◆ HasMadMixInsts

bool llvm::AMDGPUSubtarget::HasMadMixInsts = false
protected

Definition at line 52 of file AMDGPUSubtarget.h.

Referenced by hasMadMixInsts().

◆ HasMulI24

bool llvm::AMDGPUSubtarget::HasMulI24 = true
protected

◆ HasMulU24

bool llvm::AMDGPUSubtarget::HasMulU24 = true
protected

◆ HasSDWA

bool llvm::AMDGPUSubtarget::HasSDWA = false
protected

Definition at line 55 of file AMDGPUSubtarget.h.

Referenced by hasSDWA().

◆ HasSMulHi

bool llvm::AMDGPUSubtarget::HasSMulHi = false
protected

◆ HasTrigReducedRange

bool llvm::AMDGPUSubtarget::HasTrigReducedRange = false
protected

Definition at line 63 of file AMDGPUSubtarget.h.

Referenced by hasTrigReducedRange().

◆ HasTrue16BitInsts

bool llvm::AMDGPUSubtarget::HasTrue16BitInsts = false
protected

Definition at line 51 of file AMDGPUSubtarget.h.

Referenced by hasTrue16BitInsts().

◆ HasVOP3PInsts

bool llvm::AMDGPUSubtarget::HasVOP3PInsts = false
protected

Definition at line 56 of file AMDGPUSubtarget.h.

Referenced by hasVOP3PInsts().

◆ LocalMemorySize

unsigned llvm::AMDGPUSubtarget::LocalMemorySize = 0
protected

◆ MaxWavesPerEU

unsigned llvm::AMDGPUSubtarget::MaxWavesPerEU = 10
protected

Definition at line 64 of file AMDGPUSubtarget.h.

Referenced by llvm::GCNSubtarget::GCNSubtarget(), and getMaxWavesPerEU().

◆ WavefrontSizeLog2

char llvm::AMDGPUSubtarget::WavefrontSizeLog2 = 0
protected

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