llvm::GenericUniformityAnalysisImpl< ContextT > Class Template Reference

Analysis that identifies uniform values in a data-parallel execution. More...

#include "llvm/ADT/GenericUniformityImpl.h"

Classes
struct	PhiInput
	Value/block pair representing a single phi input. More...

Public Types
using	BlockT = typename ContextT::BlockT
using	FunctionT = typename ContextT::FunctionT
using	ValueRefT = typename ContextT::ValueRefT
using	ConstValueRefT = typename ContextT::ConstValueRefT
using	UseT = typename ContextT::UseT
using	InstructionT = typename ContextT::InstructionT
using	DominatorTreeT = typename ContextT::DominatorTreeT
using	CycleInfoT = GenericCycleInfo< ContextT >
using	CycleT = typename CycleInfoT::CycleT
using	SyncDependenceAnalysisT = GenericSyncDependenceAnalysis< ContextT >
using	DivergenceDescriptorT = typename SyncDependenceAnalysisT::DivergenceDescriptor
using	BlockLabelMapT = typename SyncDependenceAnalysisT::BlockLabelMap

Public Member Functions
	GenericUniformityAnalysisImpl (const DominatorTreeT &DT, const CycleInfoT &CI, const TargetTransformInfo *TTI)
void	initialize ()
const FunctionT &	getFunction () const
void	addUniformOverride (const InstructionT &Instr)
	Mark UniVal as a value that is always uniform.
void	markDivergent (const InstructionT &I)
	Examine I for divergent outputs and add to the worklist.
bool	markDivergent (ConstValueRefT DivVal)
	Mark DivVal as a divergent value.
bool	markDefsDivergent (const InstructionT &Instr)
	Mark outputs of Instr as divergent.
void	compute ()
	Propagate divergence to all instructions in the region.
bool	hasDivergence () const
	Whether any value was marked or analyzed to be divergent.
bool	isAlwaysUniform (const InstructionT &Instr) const
	Whether Val will always return a uniform value regardless of its operands.
bool	hasDivergentDefs (const InstructionT &I) const
bool	isDivergent (const InstructionT &I) const
bool	isDivergent (ConstValueRefT V) const
	Whether Val is divergent at its definition.
bool	isDivergentUse (const UseT &U) const
bool	hasDivergentTerminator (const BlockT &B) const
void	print (raw_ostream &out) const
bool	hasDivergentDefs (const Instruction &I) const
bool	markDefsDivergent (const Instruction &Instr)
void	initialize ()
bool	isDivergentUse (const Use &U) const
bool	hasDivergentDefs (const MachineInstr &I) const
bool	markDefsDivergent (const MachineInstr &Instr)
void	initialize ()
bool	isDivergentUse (const MachineOperand &U) const

Protected Member Functions
void	analyzeControlDivergence (const InstructionT &Term)
	Mark Term as divergent and push all Instructions that become divergent as a result on the worklist.

Protected Attributes
const ContextT &	Context
const FunctionT &	F
const CycleInfoT &	CI
const TargetTransformInfo *	TTI = nullptr
DenseSet< ConstValueRefT >	DivergentValues
SmallPtrSet< const BlockT *, 32 >	DivergentTermBlocks
std::vector< const InstructionT * >	Worklist

Detailed Description

template<typename ContextT>
class llvm::GenericUniformityAnalysisImpl< ContextT >

Analysis that identifies uniform values in a data-parallel execution.

This analysis propagates divergence in a data-parallel context from sources of divergence to all users. It can be instantiated for an IR that provides a suitable SSAContext.

Definition at line 327 of file GenericUniformityImpl.h.

Member Typedef Documentation

BlockLabelMapT

template<typename ContextT >

using llvm::GenericUniformityAnalysisImpl< ContextT >::BlockLabelMapT = typename SyncDependenceAnalysisT::BlockLabelMap

Definition at line 343 of file GenericUniformityImpl.h.

BlockT

template<typename ContextT >

using llvm::GenericUniformityAnalysisImpl< ContextT >::BlockT = typename ContextT::BlockT

Definition at line 329 of file GenericUniformityImpl.h.

ConstValueRefT

template<typename ContextT >

using llvm::GenericUniformityAnalysisImpl< ContextT >::ConstValueRefT = typename ContextT::ConstValueRefT

Definition at line 332 of file GenericUniformityImpl.h.

CycleInfoT

template<typename ContextT >

using llvm::GenericUniformityAnalysisImpl< ContextT >::CycleInfoT = GenericCycleInfo<ContextT>

Definition at line 337 of file GenericUniformityImpl.h.

CycleT

template<typename ContextT >

using llvm::GenericUniformityAnalysisImpl< ContextT >::CycleT = typename CycleInfoT::CycleT

Definition at line 338 of file GenericUniformityImpl.h.

DivergenceDescriptorT

template<typename ContextT >

using llvm::GenericUniformityAnalysisImpl< ContextT >::DivergenceDescriptorT = typename SyncDependenceAnalysisT::DivergenceDescriptor

Definition at line 341 of file GenericUniformityImpl.h.

DominatorTreeT

template<typename ContextT >

using llvm::GenericUniformityAnalysisImpl< ContextT >::DominatorTreeT = typename ContextT::DominatorTreeT

Definition at line 335 of file GenericUniformityImpl.h.

FunctionT

template<typename ContextT >

using llvm::GenericUniformityAnalysisImpl< ContextT >::FunctionT = typename ContextT::FunctionT

Definition at line 330 of file GenericUniformityImpl.h.

InstructionT

template<typename ContextT >

using llvm::GenericUniformityAnalysisImpl< ContextT >::InstructionT = typename ContextT::InstructionT

Definition at line 334 of file GenericUniformityImpl.h.

SyncDependenceAnalysisT

template<typename ContextT >

using llvm::GenericUniformityAnalysisImpl< ContextT >::SyncDependenceAnalysisT = GenericSyncDependenceAnalysis<ContextT>

Definition at line 340 of file GenericUniformityImpl.h.

UseT

template<typename ContextT >

using llvm::GenericUniformityAnalysisImpl< ContextT >::UseT = typename ContextT::UseT

Definition at line 333 of file GenericUniformityImpl.h.

ValueRefT

template<typename ContextT >

using llvm::GenericUniformityAnalysisImpl< ContextT >::ValueRefT = typename ContextT::ValueRefT

Definition at line 331 of file GenericUniformityImpl.h.

Constructor & Destructor Documentation

GenericUniformityAnalysisImpl()

template<typename ContextT >

llvm::GenericUniformityAnalysisImpl< ContextT >::GenericUniformityAnalysisImpl ( const DominatorTreeT &  DT, const CycleInfoT &  CI, const TargetTransformInfo *  TTI  )

inline

Definition at line 345 of file GenericUniformityImpl.h.

Member Function Documentation

addUniformOverride()

template<typename ContextT >

void llvm::GenericUniformityAnalysisImpl< ContextT >::addUniformOverride

(

const InstructionT &

Instr

)

Mark UniVal as a value that is always uniform.

Definition at line 811 of file GenericUniformityImpl.h.

analyzeControlDivergence()

template<typename ContextT >

void llvm::GenericUniformityAnalysisImpl< ContextT >::analyzeControlDivergence ( const InstructionT &  Term )

protected

Mark Term as divergent and push all Instructions that become divergent as a result on the worklist.

Definition at line 1049 of file GenericUniformityImpl.h.

References A, assert(), B, llvm::CallingConv::C, llvm::dbgs(), llvm::getOutermostDivergentCycle(), llvm::insertIfNotContained(), LLVM_DEBUG, llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::sort().

compute()

template<typename ContextT >

void llvm::GenericUniformityAnalysisImpl< ContextT >::compute

Propagate divergence to all instructions in the region.

Divergence is seeded by calls to markDivergent.

Definition at line 1105 of file GenericUniformityImpl.h.

References assert(), llvm::dbgs(), I, and LLVM_DEBUG.

getFunction()

template<typename ContextT >

const FunctionT & llvm::GenericUniformityAnalysisImpl< ContextT >::getFunction ( ) const

inline

Definition at line 352 of file GenericUniformityImpl.h.

References llvm::GenericUniformityAnalysisImpl< ContextT >::F.

hasDivergence()

template<typename ContextT >

bool llvm::GenericUniformityAnalysisImpl< ContextT >::hasDivergence ( ) const

inline

Whether any value was marked or analyzed to be divergent.

Definition at line 373 of file GenericUniformityImpl.h.

References llvm::GenericUniformityAnalysisImpl< ContextT >::DivergentValues, and llvm::detail::DenseSetImpl< ValueT, MapTy, ValueInfoT >::empty().

hasDivergentDefs() [1/3]

bool llvm::GenericUniformityAnalysisImpl< SSAContext >::hasDivergentDefs

(

const Instruction &

I

)

const

Definition at line 22 of file UniformityAnalysis.cpp.

References I.

hasDivergentDefs() [2/3]

template<typename ContextT >

bool llvm::GenericUniformityAnalysisImpl< ContextT >::hasDivergentDefs

(

const InstructionT &

I

)

const

Referenced by llvm::GenericUniformityAnalysisImpl< ContextT >::isDivergent().

hasDivergentDefs() [3/3]

bool llvm::GenericUniformityAnalysisImpl< MachineSSAContext >::hasDivergentDefs

(

const MachineInstr &

I

)

const

Definition at line 21 of file MachineUniformityAnalysis.cpp.

References I, and op.

hasDivergentTerminator()

template<typename ContextT >

bool llvm::GenericUniformityAnalysisImpl< ContextT >::hasDivergentTerminator ( const BlockT &  B ) const

inline

Definition at line 393 of file GenericUniformityImpl.h.

References B, llvm::SmallPtrSetImpl< PtrType >::contains(), and llvm::GenericUniformityAnalysisImpl< ContextT >::DivergentTermBlocks.

initialize() [1/3]

template<typename ContextT >

void llvm::GenericUniformityAnalysisImpl< ContextT >::initialize

(

)

initialize() [2/3]

void llvm::GenericUniformityAnalysisImpl< SSAContext >::initialize

(

)

Definition at line 33 of file UniformityAnalysis.cpp.

References F, I, instructions, llvm::TargetTransformInfo::isAlwaysUniform(), and llvm::TargetTransformInfo::isSourceOfDivergence().

initialize() [3/3]

void llvm::GenericUniformityAnalysisImpl< MachineSSAContext >::initialize

(

)

Definition at line 49 of file MachineUniformityAnalysis.cpp.

References block, F, instr, and uniformity.

isAlwaysUniform()

template<typename ContextT >

bool llvm::GenericUniformityAnalysisImpl< ContextT >::isAlwaysUniform

(

const InstructionT &

Instr

)

const

Whether Val will always return a uniform value regardless of its operands.

Definition at line 1133 of file GenericUniformityImpl.h.

isDivergent() [1/2]

template<typename ContextT >

bool llvm::GenericUniformityAnalysisImpl< ContextT >::isDivergent ( const InstructionT &  I ) const

inline

Definition at line 381 of file GenericUniformityImpl.h.

References llvm::SmallPtrSetImpl< PtrType >::contains(), llvm::GenericUniformityAnalysisImpl< ContextT >::DivergentTermBlocks, llvm::GenericUniformityAnalysisImpl< ContextT >::hasDivergentDefs(), and I.

isDivergent() [2/2]

template<typename ContextT >

bool llvm::GenericUniformityAnalysisImpl< ContextT >::isDivergent ( ConstValueRefT  V ) const

inline

Whether Val is divergent at its definition.

Definition at line 389 of file GenericUniformityImpl.h.

References llvm::detail::DenseSetImpl< ValueT, MapTy, ValueInfoT >::count(), and llvm::GenericUniformityAnalysisImpl< ContextT >::DivergentValues.

isDivergentUse() [1/3]

bool llvm::GenericUniformityAnalysisImpl< MachineSSAContext >::isDivergentUse

(

const MachineOperand &

U

)

const

Definition at line 131 of file MachineUniformityAnalysis.cpp.

References F.

isDivergentUse() [2/3]

bool llvm::GenericUniformityAnalysisImpl< SSAContext >::isDivergentUse

(

const Use &

U

)

const

Definition at line 94 of file UniformityAnalysis.cpp.

isDivergentUse() [3/3]

template<typename ContextT >

bool llvm::GenericUniformityAnalysisImpl< ContextT >::isDivergentUse

(

const UseT &

U

)

const

markDefsDivergent() [1/3]

bool llvm::GenericUniformityAnalysisImpl< SSAContext >::markDefsDivergent

(

const Instruction &

Instr

)

Definition at line 28 of file UniformityAnalysis.cpp.

markDefsDivergent() [2/3]

template<typename ContextT >

bool llvm::GenericUniformityAnalysisImpl< ContextT >::markDefsDivergent

(

const InstructionT &

Instr

)

Mark outputs of Instr as divergent.

Returns

Whether the tracked divergence state of any output has changed.

markDefsDivergent() [3/3]

bool llvm::GenericUniformityAnalysisImpl< MachineSSAContext >::markDefsDivergent

(

const MachineInstr &

Instr

)

Definition at line 31 of file MachineUniformityAnalysis.cpp.

References assert(), F, MRI, op, and TRI.

markDivergent() [1/2]

template<typename ContextT >

void llvm::GenericUniformityAnalysisImpl< ContextT >::markDivergent

(

const InstructionT &

I

)

Examine I for divergent outputs and add to the worklist.

Definition at line 781 of file GenericUniformityImpl.h.

References llvm::dbgs(), I, and LLVM_DEBUG.

markDivergent() [2/2]

template<typename ContextT >

bool llvm::GenericUniformityAnalysisImpl< ContextT >::markDivergent

(

ConstValueRefT

DivVal

)

Mark DivVal as a divergent value.

Returns

Whether the tracked divergence state of DivVal changed.

Definition at line 801 of file GenericUniformityImpl.h.

References llvm::dbgs(), and LLVM_DEBUG.

print()

template<typename ContextT >

void llvm::GenericUniformityAnalysisImpl< ContextT >::print

(

raw_ostream &

out

)

const

Definition at line 1146 of file GenericUniformityImpl.h.

References block, F, OS, and value.

Member Data Documentation

CI

template<typename ContextT >

const CycleInfoT& llvm::GenericUniformityAnalysisImpl< ContextT >::CI

protected

Definition at line 411 of file GenericUniformityImpl.h.

Context

template<typename ContextT >

const ContextT& llvm::GenericUniformityAnalysisImpl< ContextT >::Context

protected

Definition at line 409 of file GenericUniformityImpl.h.

DivergentTermBlocks

template<typename ContextT >

SmallPtrSet<const BlockT *, 32> llvm::GenericUniformityAnalysisImpl< ContextT >::DivergentTermBlocks

protected

Definition at line 416 of file GenericUniformityImpl.h.

Referenced by llvm::GenericUniformityAnalysisImpl< ContextT >::hasDivergentTerminator(), and llvm::GenericUniformityAnalysisImpl< ContextT >::isDivergent().

DivergentValues

template<typename ContextT >

DenseSet<ConstValueRefT> llvm::GenericUniformityAnalysisImpl< ContextT >::DivergentValues

protected

Definition at line 415 of file GenericUniformityImpl.h.

Referenced by llvm::GenericUniformityAnalysisImpl< ContextT >::hasDivergence(), and llvm::GenericUniformityAnalysisImpl< ContextT >::isDivergent().

F

template<typename ContextT >

const FunctionT& llvm::GenericUniformityAnalysisImpl< ContextT >::F

protected

Definition at line 410 of file GenericUniformityImpl.h.

Referenced by llvm::GenericUniformityAnalysisImpl< ContextT >::getFunction().

TTI

template<typename ContextT >

const TargetTransformInfo* llvm::GenericUniformityAnalysisImpl< ContextT >::TTI = nullptr

protected

Definition at line 412 of file GenericUniformityImpl.h.

Worklist

template<typename ContextT >

std::vector<const InstructionT *> llvm::GenericUniformityAnalysisImpl< ContextT >::Worklist

protected

Definition at line 419 of file GenericUniformityImpl.h.

---

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

• include/llvm/ADT/GenericUniformityImpl.h