LLVM  14.0.0git
Public Types | Public Member Functions | Static Public Member Functions | Protected Attributes | List of all members
llvm::AMDGPUSubtarget Class Referenceabstract

#include "Target/AMDGPU/AMDGPUSubtarget.h"

Inheritance diagram for llvm::AMDGPUSubtarget:
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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
}
 

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
 
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 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 ()
 

Static Public Member Functions

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

Protected Attributes

bool GCN3Encoding
 
bool Has16BitInsts
 
bool HasMadMixInsts
 
bool HasMadMacF32Insts
 
bool HasDsSrc2Insts
 
bool HasSDWA
 
bool HasVOP3PInsts
 
bool HasMulI24
 
bool HasMulU24
 
bool HasSMulHi
 
bool HasInv2PiInlineImm
 
bool HasFminFmaxLegacy
 
bool EnablePromoteAlloca
 
bool HasTrigReducedRange
 
unsigned MaxWavesPerEU
 
unsigned LocalMemorySize
 
char WavefrontSizeLog2
 

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 

Definition at line 31 of file AMDGPUSubtarget.h.

Constructor & Destructor Documentation

◆ AMDGPUSubtarget()

AMDGPUSubtarget::AMDGPUSubtarget ( const Triple TT)

Definition at line 178 of file AMDGPUSubtarget.cpp.

◆ ~AMDGPUSubtarget()

virtual llvm::AMDGPUSubtarget::~AMDGPUSubtarget ( )
inlinevirtual

Definition at line 247 of file AMDGPUSubtarget.h.

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 1146 of file AMDGPUSubtarget.cpp.

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

◆ getAlignmentForImplicitArgPtr()

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

Definition at line 197 of file AMDGPUSubtarget.h.

References Align, and isAmdHsaOS().

Referenced by getKernArgSegmentSize().

◆ getAMDGPUDwarfFlavour()

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

Definition at line 719 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 203 of file AMDGPUSubtarget.h.

References F, and isAmdHsaOrMesa().

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 528 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 672 of file AMDGPUSubtarget.cpp.

References F, llvm::AMDGPU::getIntegerAttribute(), 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 193 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 458 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 228 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 602 of file AMDGPUSubtarget.cpp.

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

◆ 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 471 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()

std::pair< unsigned, unsigned > AMDGPUSubtarget::getWavesPerEU ( const Function F) const
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 551 of file AMDGPUSubtarget.cpp.

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

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

◆ 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 145 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 137 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 177 of file AMDGPUSubtarget.h.

References HasTrigReducedRange.

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

◆ hasVOP3PInsts()

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

◆ isAmdHsaOrMesa()

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

Definition at line 121 of file AMDGPUSubtarget.h.

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

Referenced by getExplicitKernelArgOffset().

◆ isAmdHsaOS()

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

◆ isAmdPalOS()

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

◆ isGCN()

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

Definition at line 125 of file AMDGPUSubtarget.h.

References llvm::Triple::amdgcn, and llvm::Triple::getArch().

Referenced by hasMadMacF32Insts().

◆ isGCN3Encoding()

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

Definition at line 129 of file AMDGPUSubtarget.h.

References GCN3Encoding.

◆ isMesa3DOS()

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

◆ isMesaKernel()

bool AMDGPUSubtarget::isMesaKernel ( const Function F) const

Definition at line 598 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 181 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 610 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
protected

Definition at line 60 of file AMDGPUSubtarget.h.

Referenced by isPromoteAllocaEnabled().

◆ GCN3Encoding

bool llvm::AMDGPUSubtarget::GCN3Encoding
protected

Definition at line 48 of file AMDGPUSubtarget.h.

Referenced by isGCN3Encoding().

◆ Has16BitInsts

bool llvm::AMDGPUSubtarget::Has16BitInsts
protected

Definition at line 49 of file AMDGPUSubtarget.h.

Referenced by has16BitInsts().

◆ HasDsSrc2Insts

bool llvm::AMDGPUSubtarget::HasDsSrc2Insts
protected

Definition at line 52 of file AMDGPUSubtarget.h.

Referenced by hasDsSrc2Insts().

◆ HasFminFmaxLegacy

bool llvm::AMDGPUSubtarget::HasFminFmaxLegacy
protected

◆ HasInv2PiInlineImm

bool llvm::AMDGPUSubtarget::HasInv2PiInlineImm
protected

Definition at line 58 of file AMDGPUSubtarget.h.

Referenced by hasInv2PiInlineImm().

◆ HasMadMacF32Insts

bool llvm::AMDGPUSubtarget::HasMadMacF32Insts
protected

Definition at line 51 of file AMDGPUSubtarget.h.

Referenced by hasMadMacF32Insts().

◆ HasMadMixInsts

bool llvm::AMDGPUSubtarget::HasMadMixInsts
protected

Definition at line 50 of file AMDGPUSubtarget.h.

Referenced by hasMadMixInsts().

◆ HasMulI24

bool llvm::AMDGPUSubtarget::HasMulI24
protected

◆ HasMulU24

bool llvm::AMDGPUSubtarget::HasMulU24
protected

◆ HasSDWA

bool llvm::AMDGPUSubtarget::HasSDWA
protected

Definition at line 53 of file AMDGPUSubtarget.h.

Referenced by hasSDWA().

◆ HasSMulHi

bool llvm::AMDGPUSubtarget::HasSMulHi
protected

◆ HasTrigReducedRange

bool llvm::AMDGPUSubtarget::HasTrigReducedRange
protected

Definition at line 61 of file AMDGPUSubtarget.h.

Referenced by hasTrigReducedRange().

◆ HasVOP3PInsts

bool llvm::AMDGPUSubtarget::HasVOP3PInsts
protected

Definition at line 54 of file AMDGPUSubtarget.h.

Referenced by hasVOP3PInsts().

◆ LocalMemorySize

unsigned llvm::AMDGPUSubtarget::LocalMemorySize
protected

◆ MaxWavesPerEU

unsigned llvm::AMDGPUSubtarget::MaxWavesPerEU
protected

Definition at line 62 of file AMDGPUSubtarget.h.

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

◆ WavefrontSizeLog2

char llvm::AMDGPUSubtarget::WavefrontSizeLog2
protected

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