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llvm::BlockFrequencyInfoImplBase Class Reference

Base class for BlockFrequencyInfoImpl. More...

#include "llvm/Analysis/BlockFrequencyInfoImpl.h"

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Classes

struct  BlockNode
 Representative of a block. More...
 
struct  Distribution
 Distribution of unscaled probability weight. More...
 
struct  FrequencyData
 Stats about a block itself. More...
 
struct  LoopData
 Data about a loop. More...
 
struct  Weight
 Unscaled probability weight. More...
 
struct  WorkingData
 Index of loop information. More...
 

Public Types

using Scaled64 = ScaledNumber< uint64_t >
 
using BlockMass = bfi_detail::BlockMass
 

Public Member Functions

virtual ~BlockFrequencyInfoImplBase ()=default
 Virtual destructor. More...
 
bool addLoopSuccessorsToDist (const LoopData *OuterLoop, LoopData &Loop, Distribution &Dist)
 Add all edges out of a packaged loop to the distribution. More...
 
bool addToDist (Distribution &Dist, const LoopData *OuterLoop, const BlockNode &Pred, const BlockNode &Succ, uint64_t Weight)
 Add an edge to the distribution. More...
 
LoopDatagetLoopPackage (const BlockNode &Head)
 
iterator_range< std::list< LoopData >::iterator > analyzeIrreducible (const bfi_detail::IrreducibleGraph &G, LoopData *OuterLoop, std::list< LoopData >::iterator Insert)
 Analyze irreducible SCCs. More...
 
void updateLoopWithIrreducible (LoopData &OuterLoop)
 Update a loop after packaging irreducible SCCs inside of it. More...
 
void distributeMass (const BlockNode &Source, LoopData *OuterLoop, Distribution &Dist)
 Distribute mass according to a distribution. More...
 
void computeLoopScale (LoopData &Loop)
 Compute the loop scale for a loop. More...
 
void adjustLoopHeaderMass (LoopData &Loop)
 Adjust the mass of all headers in an irreducible loop. More...
 
void distributeIrrLoopHeaderMass (Distribution &Dist)
 
void packageLoop (LoopData &Loop)
 Package up a loop. More...
 
void unwrapLoops ()
 Unwrap loops. More...
 
void finalizeMetrics ()
 Finalize frequency metrics. More...
 
void clear ()
 Clear all memory. More...
 
virtual std::string getBlockName (const BlockNode &Node) const
 
std::string getLoopName (const LoopData &Loop) const
 
virtual raw_ostreamprint (raw_ostream &OS) const
 
void dump () const
 
Scaled64 getFloatingBlockFreq (const BlockNode &Node) const
 
BlockFrequency getBlockFreq (const BlockNode &Node) const
 
Optional< uint64_t > getBlockProfileCount (const Function &F, const BlockNode &Node) const
 
Optional< uint64_t > getProfileCountFromFreq (const Function &F, uint64_t Freq) const
 
bool isIrrLoopHeader (const BlockNode &Node)
 
void setBlockFreq (const BlockNode &Node, uint64_t Freq)
 
raw_ostreamprintBlockFreq (raw_ostream &OS, const BlockNode &Node) const
 
raw_ostreamprintBlockFreq (raw_ostream &OS, const BlockFrequency &Freq) const
 
uint64_t getEntryFreq () const
 

Public Attributes

std::vector< FrequencyDataFreqs
 Data about each block. This is used downstream. More...
 
SparseBitVector IsIrrLoopHeader
 Whether each block is an irreducible loop header. More...
 
std::vector< WorkingDataWorking
 Loop data: see initializeLoops(). More...
 
std::list< LoopDataLoops
 Indexed information about loops. More...
 

Detailed Description

Base class for BlockFrequencyInfoImpl.

BlockFrequencyInfoImplBase has supporting data structures and some algorithms for BlockFrequencyInfoImplBase. Only algorithms that depend on the block type (or that call such algorithms) are skipped here.

Nevertheless, the majority of the overall algorithm documention lives with BlockFrequencyInfoImpl. See there for details.

Definition at line 175 of file BlockFrequencyInfoImpl.h.

Member Typedef Documentation

◆ BlockMass

Definition at line 178 of file BlockFrequencyInfoImpl.h.

◆ Scaled64

Definition at line 177 of file BlockFrequencyInfoImpl.h.

Constructor & Destructor Documentation

◆ ~BlockFrequencyInfoImplBase()

virtual llvm::BlockFrequencyInfoImplBase::~BlockFrequencyInfoImplBase ( )
virtualdefault

Virtual destructor.

Need a virtual destructor to mask the compiler warning about getBlockName().

Member Function Documentation

◆ addLoopSuccessorsToDist()

bool BlockFrequencyInfoImplBase::addLoopSuccessorsToDist ( const LoopData OuterLoop,
LoopData Loop,
Distribution Dist 
)

Add all edges out of a packaged loop to the distribution.

Adds all edges from LocalLoopHead to Dist. Calls addToDist() to add each successor edge.

Returns
true unless there's an irreducible backedge.

Definition at line 352 of file BlockFrequencyInfoImpl.cpp.

References llvm::BlockFrequencyInfoImplBase::LoopData::Exits, llvm::BlockFrequencyInfoImplBase::LoopData::getHeader(), and I.

◆ addToDist()

bool BlockFrequencyInfoImplBase::addToDist ( Distribution Dist,
const LoopData OuterLoop,
const BlockNode Pred,
const BlockNode Succ,
uint64_t  Weight 
)

Add an edge to the distribution.

Adds an edge to Succ to Dist. If LoopHead.isValid(), then whether the edge is local/exit/backedge is in the context of LoopHead. Otherwise, every edge should be a local edge (since all the loops are packaged up).

Returns
true unless aborted due to an irreducible backedge.

Definition at line 290 of file BlockFrequencyInfoImpl.cpp.

References llvm::BlockFrequencyInfoImplBase::Distribution::addBackedge(), llvm::BlockFrequencyInfoImplBase::Distribution::addExit(), llvm::BlockFrequencyInfoImplBase::Distribution::addLocal(), assert(), llvm::dbgs(), DEBUG, llvm::bfi_detail::getBlockName(), llvm::BlockFrequencyInfoImplBase::BlockNode::Index, llvm::BlockFrequencyInfoImplBase::LoopData::isHeader(), and llvm::BlockFrequencyInfoImplBase::LoopData::isIrreducible().

◆ adjustLoopHeaderMass()

void BlockFrequencyInfoImplBase::adjustLoopHeaderMass ( LoopData Loop)

◆ analyzeIrreducible()

iterator_range< std::list< LoopData >::iterator > BlockFrequencyInfoImplBase::analyzeIrreducible ( const bfi_detail::IrreducibleGraph G,
LoopData OuterLoop,
std::list< LoopData >::iterator  Insert 
)

Analyze irreducible SCCs.

Separate irreducible SCCs from G, which is an explict graph of OuterLoop (or the top-level function, if OuterLoop is nullptr). Insert them into Loops before Insert.

Returns
the LoopData nodes representing the irreducible SCCs.

Definition at line 766 of file BlockFrequencyInfoImpl.cpp.

References assert(), createIrreducibleLoop(), I, Loops, llvm::make_range(), and llvm::scc_begin().

◆ clear()

void BlockFrequencyInfoImplBase::clear ( )

Clear all memory.

Definition at line 270 of file BlockFrequencyInfoImpl.cpp.

References Loops, and std::swap().

Referenced by llvm::BlockFrequencyInfoImpl< llvm::BitTracker >::calculate(), and cleanup().

◆ computeLoopScale()

void BlockFrequencyInfoImplBase::computeLoopScale ( LoopData Loop)

◆ distributeIrrLoopHeaderMass()

void BlockFrequencyInfoImplBase::distributeIrrLoopHeaderMass ( Distribution Dist)

◆ distributeMass()

void BlockFrequencyInfoImplBase::distributeMass ( const BlockNode Source,
LoopData OuterLoop,
Distribution Dist 
)

◆ dump()

void llvm::BlockFrequencyInfoImplBase::dump ( ) const
inline

◆ finalizeMetrics()

void BlockFrequencyInfoImplBase::finalizeMetrics ( )

Finalize frequency metrics.

Calculates final frequencies and cleans up no-longer-needed data structures.

Definition at line 529 of file BlockFrequencyInfoImpl.cpp.

References cleanup(), convertFloatingToInteger(), DEBUG, llvm::bfi_detail::BlockMass::dump(), and llvm::max().

◆ getBlockFreq()

BlockFrequency BlockFrequencyInfoImplBase::getBlockFreq ( const BlockNode Node) const

◆ getBlockName()

std::string BlockFrequencyInfoImplBase::getBlockName ( const BlockNode Node) const
virtual

◆ getBlockProfileCount()

Optional< uint64_t > BlockFrequencyInfoImplBase::getBlockProfileCount ( const Function F,
const BlockNode Node 
) const

◆ getEntryFreq()

uint64_t llvm::BlockFrequencyInfoImplBase::getEntryFreq ( ) const
inline

◆ getFloatingBlockFreq()

Scaled64 BlockFrequencyInfoImplBase::getFloatingBlockFreq ( const BlockNode Node) const

◆ getLoopName()

std::string BlockFrequencyInfoImplBase::getLoopName ( const LoopData Loop) const

◆ getLoopPackage()

LoopData& llvm::BlockFrequencyInfoImplBase::getLoopPackage ( const BlockNode Head)
inline

◆ getProfileCountFromFreq()

Optional< uint64_t > BlockFrequencyInfoImplBase::getProfileCountFromFreq ( const Function F,
uint64_t  Freq 
) const

◆ isIrrLoopHeader()

bool BlockFrequencyInfoImplBase::isIrrLoopHeader ( const BlockNode Node)

◆ packageLoop()

void BlockFrequencyInfoImplBase::packageLoop ( LoopData Loop)

◆ print()

virtual raw_ostream& llvm::BlockFrequencyInfoImplBase::print ( raw_ostream OS) const
inlinevirtual

◆ printBlockFreq() [1/2]

raw_ostream & BlockFrequencyInfoImplBase::printBlockFreq ( raw_ostream OS,
const BlockNode Node 
) const

◆ printBlockFreq() [2/2]

raw_ostream & BlockFrequencyInfoImplBase::printBlockFreq ( raw_ostream OS,
const BlockFrequency Freq 
) const

Definition at line 616 of file BlockFrequencyInfoImpl.cpp.

References llvm::BlockFrequency::getFrequency().

◆ setBlockFreq()

void BlockFrequencyInfoImplBase::setBlockFreq ( const BlockNode Node,
uint64_t  Freq 
)

◆ unwrapLoops()

void BlockFrequencyInfoImplBase::unwrapLoops ( )

Unwrap loops.

Definition at line 520 of file BlockFrequencyInfoImpl.cpp.

References Loops, llvm::bfi_detail::BlockMass::toScaled(), and unwrapLoop().

◆ updateLoopWithIrreducible()

void BlockFrequencyInfoImplBase::updateLoopWithIrreducible ( LoopData OuterLoop)

Update a loop after packaging irreducible SCCs inside of it.

Update OuterLoop. Before finding irreducible control flow, it was partway through computeMassInLoop(), so LoopData::Exits and LoopData::BackedgeMass need to be reset. Also, nodes that were packaged up need to be removed from OuterLoop::Nodes.

Definition at line 786 of file BlockFrequencyInfoImpl.cpp.

References llvm::BlockFrequencyInfoImplBase::LoopData::BackedgeMass, llvm::SmallVectorTemplateCommon< T, typename >::begin(), llvm::SmallVectorImpl< T >::clear(), E, llvm::SmallVectorTemplateCommon< T, typename >::end(), llvm::SmallVectorImpl< T >::erase(), llvm::BlockFrequencyInfoImplBase::LoopData::Exits, llvm::bfi_detail::BlockMass::getEmpty(), I, llvm::BlockFrequencyInfoImplBase::LoopData::Nodes, and llvm::RISCVFenceField::O.

Member Data Documentation

◆ Freqs

std::vector<FrequencyData> llvm::BlockFrequencyInfoImplBase::Freqs

Data about each block. This is used downstream.

Definition at line 417 of file BlockFrequencyInfoImpl.h.

Referenced by cleanup(), convertFloatingToInteger(), and unwrapLoop().

◆ IsIrrLoopHeader

SparseBitVector llvm::BlockFrequencyInfoImplBase::IsIrrLoopHeader

Whether each block is an irreducible loop header.

This is used downstream.

Definition at line 421 of file BlockFrequencyInfoImpl.h.

Referenced by cleanup().

◆ Loops

std::list<LoopData> llvm::BlockFrequencyInfoImplBase::Loops

Indexed information about loops.

Definition at line 427 of file BlockFrequencyInfoImpl.h.

Referenced by createIrreducibleLoop().

◆ Working

std::vector<WorkingData> llvm::BlockFrequencyInfoImplBase::Working

Loop data: see initializeLoops().

Definition at line 424 of file BlockFrequencyInfoImpl.h.

Referenced by llvm::bfi_detail::IrreducibleGraph::addNode(), createIrreducibleLoop(), and unwrapLoop().


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