GCNHazardRecognizer.cpp File Reference

#include "GCNHazardRecognizer.h"
#include "GCNSubtarget.h"
#include "MCTargetDesc/AMDGPUMCTargetDesc.h"
#include "SIMachineFunctionInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/ScheduleDAG.h"
#include "llvm/TargetParser/TargetParser.h"

Include dependency graph for GCNHazardRecognizer.cpp:

Go to the source code of this file.

Typedefs
typedef function_ref< bool(const MachineInstr &, int WaitStates)>	IsExpiredFn
typedef function_ref< unsigned int(const MachineInstr &)>	GetNumWaitStatesFn

Enumerations
enum	HazardFnResult { HazardFound , HazardExpired , NoHazardFound }

Functions
static bool	shouldRunLdsBranchVmemWARHazardFixup (const MachineFunction &MF, const GCNSubtarget &ST)
static bool	isDivFMas (unsigned Opcode)
static bool	isSGetReg (unsigned Opcode)
static bool	isSSetReg (unsigned Opcode)
static bool	isRWLane (unsigned Opcode)
static bool	isRFE (unsigned Opcode)
static bool	isSMovRel (unsigned Opcode)
static bool	isDGEMM (unsigned Opcode)
static bool	isXDL (const GCNSubtarget &ST, const MachineInstr &MI)
static bool	isSendMsgTraceDataOrGDS (const SIInstrInfo &TII, const MachineInstr &MI)
static bool	isPermlane (const MachineInstr &MI)
static bool	isLdsDma (const MachineInstr &MI)
static unsigned	getHWReg (const SIInstrInfo *TII, const MachineInstr &RegInstr)
static void	insertNoopsInBundle (MachineInstr *MI, const SIInstrInfo &TII, unsigned Quantity)
template<typename StateT >
static bool	hasHazard (StateT State, function_ref< HazardFnResult(StateT &, const MachineInstr &)> IsHazard, function_ref< void(StateT &, const MachineInstr &)> UpdateState, const MachineBasicBlock *MBB, MachineBasicBlock::const_reverse_instr_iterator I, DenseSet< const MachineBasicBlock * > &Visited)
static int	getWaitStatesSince (GCNHazardRecognizer::IsHazardFn IsHazard, const MachineBasicBlock *MBB, MachineBasicBlock::const_reverse_instr_iterator I, int WaitStates, IsExpiredFn IsExpired, DenseSet< const MachineBasicBlock * > &Visited, GetNumWaitStatesFn GetNumWaitStates=SIInstrInfo::getNumWaitStates)
static int	getWaitStatesSince (GCNHazardRecognizer::IsHazardFn IsHazard, const MachineInstr *MI, IsExpiredFn IsExpired)
static void	addRegUnits (const SIRegisterInfo &TRI, BitVector &BV, MCRegister Reg)
static void	addRegsToSet (const SIRegisterInfo &TRI, iterator_range< MachineInstr::const_mop_iterator > Ops, BitVector &Set)
static bool	breaksSMEMSoftClause (MachineInstr *MI)
static bool	breaksVMEMSoftClause (MachineInstr *MI)
static bool	isStoreCountWaitZero (const MachineInstr &I)

Variables
static cl::opt< unsigned, false, MFMAPaddingRatioParser >	MFMAPaddingRatio ("amdgpu-mfma-padding-ratio", cl::init(0), cl::Hidden, cl::desc("Fill a percentage of the latency between " "neighboring MFMA with s_nops."))

Typedef Documentation

GetNumWaitStatesFn

typedef function_ref<unsigned int(const MachineInstr &)> GetNumWaitStatesFn

Definition at line 448 of file GCNHazardRecognizer.cpp.

IsExpiredFn

typedef function_ref<bool(const MachineInstr &, int WaitStates)> IsExpiredFn

Definition at line 447 of file GCNHazardRecognizer.cpp.

Enumeration Type Documentation

HazardFnResult

enum HazardFnResult

Enumerator
HazardFound
HazardExpired
NoHazardFound

Definition at line 445 of file GCNHazardRecognizer.cpp.

Function Documentation

addRegsToSet()

static void addRegsToSet ( const SIRegisterInfo &  TRI, iterator_range< MachineInstr::const_mop_iterator >  Ops, BitVector &  Set  )

static

Definition at line 595 of file GCNHazardRecognizer.cpp.

References addRegUnits(), and TRI.

addRegUnits()

static void addRegUnits ( const SIRegisterInfo &  TRI, BitVector &  BV, MCRegister  Reg  )

static

Definition at line 589 of file GCNHazardRecognizer.cpp.

References llvm::MCRegisterInfo::DiffListIterator::isValid(), llvm::BitVector::set(), and TRI.

Referenced by addRegsToSet().

breaksSMEMSoftClause()

static bool breaksSMEMSoftClause ( MachineInstr *  MI )

static

Definition at line 610 of file GCNHazardRecognizer.cpp.

References llvm::SIInstrInfo::isSMRD(), and MI.

breaksVMEMSoftClause()

static bool breaksVMEMSoftClause ( MachineInstr *  MI )

static

Definition at line 614 of file GCNHazardRecognizer.cpp.

References llvm::SIInstrInfo::isFLAT(), llvm::SIInstrInfo::isVMEM(), and MI.

getHWReg()

static unsigned getHWReg ( const SIInstrInfo *  TII, const MachineInstr &  RegInstr  )

static

Definition at line 174 of file GCNHazardRecognizer.cpp.

References llvm::MachineOperand::getImm(), llvm::AMDGPU::Hwreg::ID_MASK_, and TII.

getWaitStatesSince() [1/2]

static int getWaitStatesSince ( GCNHazardRecognizer::IsHazardFn  IsHazard, const MachineBasicBlock *  MBB, MachineBasicBlock::const_reverse_instr_iterator  I, int  WaitStates, IsExpiredFn  IsExpired, DenseSet< const MachineBasicBlock * > &  Visited, GetNumWaitStatesFn  GetNumWaitStates = SIInstrInfo::getNumWaitStates  )

static

Definition at line 495 of file GCNHazardRecognizer.cpp.

References E, getWaitStatesSince(), I, llvm::detail::DenseSetImpl< ValueT, MapTy, ValueInfoT >::insert(), llvm::MachineBasicBlock::instr_rend(), MBB, and llvm::MachineBasicBlock::predecessors().

Referenced by getWaitStatesSince().

getWaitStatesSince() [2/2]

static int getWaitStatesSince ( GCNHazardRecognizer::IsHazardFn  IsHazard, const MachineInstr *  MI, IsExpiredFn  IsExpired  )

static

Definition at line 531 of file GCNHazardRecognizer.cpp.

References getWaitStatesSince(), and MI.

hasHazard()

template<typename StateT >

static bool hasHazard ( StateT  State, function_ref< HazardFnResult(StateT &, const MachineInstr &)>  IsHazard, function_ref< void(StateT &, const MachineInstr &)>  UpdateState, const MachineBasicBlock *  MBB, MachineBasicBlock::const_reverse_instr_iterator  I, DenseSet< const MachineBasicBlock * > &  Visited  )

static

Definition at line 453 of file GCNHazardRecognizer.cpp.

References E, hasHazard(), HazardExpired, HazardFound, I, llvm::detail::DenseSetImpl< ValueT, MapTy, ValueInfoT >::insert(), llvm::MachineBasicBlock::instr_rend(), MBB, and llvm::MachineBasicBlock::predecessors().

Referenced by hasHazard().

insertNoopsInBundle()

static void insertNoopsInBundle ( MachineInstr *  MI, const SIInstrInfo &  TII, unsigned  Quantity  )

static

Definition at line 259 of file GCNHazardRecognizer.cpp.

References llvm::MachineInstrBuilder::addImm(), Arg, llvm::BuildMI(), MI, and TII.

isDGEMM()

static bool isDGEMM ( unsigned  Opcode )

static

Definition at line 118 of file GCNHazardRecognizer.cpp.

References llvm::AMDGPU::getMAIIsDGEMM().

Referenced by isXDL().

isDivFMas()

static bool isDivFMas ( unsigned  Opcode )

static

Definition at line 79 of file GCNHazardRecognizer.cpp.

Referenced by llvm::GCNHazardRecognizer::getHazardType(), and llvm::GCNHazardRecognizer::PreEmitNoopsCommon().

isLdsDma()

static bool isLdsDma ( const MachineInstr &  MI )

static

Definition at line 169 of file GCNHazardRecognizer.cpp.

References llvm::SIInstrInfo::isFLAT(), llvm::SIInstrInfo::isMUBUF(), llvm::SIInstrInfo::isVALU(), and MI.

Referenced by llvm::GCNHazardRecognizer::getHazardType(), and llvm::GCNHazardRecognizer::PreEmitNoopsCommon().

isPermlane()

static bool isPermlane ( const MachineInstr &  MI )

static

Definition at line 163 of file GCNHazardRecognizer.cpp.

References MI.

isRFE()

static bool isRFE ( unsigned  Opcode )

static

Definition at line 102 of file GCNHazardRecognizer.cpp.

Referenced by llvm::GCNHazardRecognizer::getHazardType(), and llvm::GCNHazardRecognizer::PreEmitNoopsCommon().

isRWLane()

static bool isRWLane ( unsigned  Opcode )

static

Definition at line 98 of file GCNHazardRecognizer.cpp.

Referenced by llvm::GCNHazardRecognizer::getHazardType(), and llvm::GCNHazardRecognizer::PreEmitNoopsCommon().

isSendMsgTraceDataOrGDS()

static bool isSendMsgTraceDataOrGDS ( const SIInstrInfo &  TII, const MachineInstr &  MI  )

static

Definition at line 137 of file GCNHazardRecognizer.cpp.

References llvm::AMDGPU::getNamedOperandIdx(), MI, and TII.

Referenced by llvm::GCNHazardRecognizer::getHazardType(), and llvm::GCNHazardRecognizer::PreEmitNoopsCommon().

isSGetReg()

static bool isSGetReg ( unsigned  Opcode )

static

Definition at line 83 of file GCNHazardRecognizer.cpp.

Referenced by llvm::GCNHazardRecognizer::getHazardType(), and llvm::GCNHazardRecognizer::PreEmitNoopsCommon().

isSMovRel()

static bool isSMovRel ( unsigned  Opcode )

static

Definition at line 106 of file GCNHazardRecognizer.cpp.

Referenced by llvm::GCNHazardRecognizer::getHazardType(), and llvm::GCNHazardRecognizer::PreEmitNoopsCommon().

isSSetReg()

static bool isSSetReg ( unsigned  Opcode )

static

Definition at line 87 of file GCNHazardRecognizer.cpp.

Referenced by llvm::GCNHazardRecognizer::getHazardType(), and llvm::GCNHazardRecognizer::PreEmitNoopsCommon().

isStoreCountWaitZero()

static bool isStoreCountWaitZero ( const MachineInstr &  I )

static

Definition at line 1334 of file GCNHazardRecognizer.cpp.

References I.

isXDL()

static bool isXDL ( const GCNSubtarget &  ST, const MachineInstr &  MI  )

static

Definition at line 122 of file GCNHazardRecognizer.cpp.

References llvm::AMDGPU::getMAIIsGFX940XDL(), isDGEMM(), llvm::SIInstrInfo::isMAI(), and MI.

shouldRunLdsBranchVmemWARHazardFixup()

static bool shouldRunLdsBranchVmemWARHazardFixup ( const MachineFunction &  MF, const GCNSubtarget &  ST  )

static

Definition at line 1313 of file GCNHazardRecognizer.cpp.

References llvm::SIInstrInfo::isDS(), llvm::SIInstrInfo::isSegmentSpecificFLAT(), llvm::SIInstrInfo::isVMEM(), MBB, and MI.

Referenced by llvm::GCNHazardRecognizer::GCNHazardRecognizer().

Variable Documentation

MFMAPaddingRatio

cl::opt< unsigned, false, MFMAPaddingRatioParser > MFMAPaddingRatio("amdgpu-mfma-padding-ratio", cl::init(0), cl::Hidden, cl::desc("Fill a percentage of the latency between " "neighboring MFMA with s_nops.")) ( "amdgpu-mfma-padding-ratio"  , cl::init(0)  , cl::Hidden  , cl::desc("Fill a percentage of the latency between " "neighboring MFMA with s_nops.")    )

static