#include "llvm/Analysis/BlockFrequencyInfoImpl.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SCCIterator.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/IR/Function.h"
#include "llvm/Support/BlockFrequency.h"
#include "llvm/Support/BranchProbability.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/ScaledNumber.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <iterator>
#include <list>
#include <numeric>
#include <optional>
#include <utility>
#include <vector>

Classes
struct	llvm::GraphTraits< IrreducibleGraph >

Namespaces
namespace	llvm
	This is an optimization pass for GlobalISel generic memory operations.

Macros
#define	DEBUG_TYPE "block-freq"

Functions
cl::opt< bool >	llvm::CheckBFIUnknownBlockQueries ("check-bfi-unknown-block-queries", cl::init(false), cl::Hidden, cl::desc("Check if block frequency is queried for an unknown block " "for debugging missed BFI updates"))

cl::opt< bool >	llvm::UseIterativeBFIInference ("use-iterative-bfi-inference", cl::Hidden, cl::desc("Apply an iterative post-processing to infer correct BFI counts"))

cl::opt< unsigned >	llvm::IterativeBFIMaxIterationsPerBlock ("iterative-bfi-max-iterations-per-block", cl::init(1000), cl::Hidden, cl::desc("Iterative inference: maximum number of update iterations " "per block"))

cl::opt< double >	llvm::IterativeBFIPrecision ("iterative-bfi-precision", cl::init(1e-12), cl::Hidden, cl::desc("Iterative inference: delta convergence precision; smaller values " "typically lead to better results at the cost of worsen runtime"))

static char	getHexDigit (int N)

static void	combineWeight (Weight &W, const Weight &OtherW)

static void	combineWeightsBySorting (WeightList &Weights)

static void	combineWeightsByHashing (WeightList &Weights)

static void	combineWeights (WeightList &Weights)

static uint64_t	shiftRightAndRound (uint64_t N, int Shift)

static void	cleanup (BlockFrequencyInfoImplBase &BFI)
	Clear all memory not needed downstream.

static void	debugAssign (const BlockFrequencyInfoImplBase &BFI, const DitheringDistributer &D, const BlockNode &T, const BlockMass &M, const char *Desc)

static void	convertFloatingToInteger (BlockFrequencyInfoImplBase &BFI, const Scaled64 &Min, const Scaled64 &Max)

static void	unwrapLoop (BlockFrequencyInfoImplBase &BFI, LoopData &Loop)
	Unwrap a loop package.

static void	findIrreducibleHeaders (const BlockFrequencyInfoImplBase &BFI, const IrreducibleGraph &G, const std::vector< const IrreducibleGraph::IrrNode * > &SCC, LoopData::NodeList &Headers, LoopData::NodeList &Others)
	Find extra irreducible headers.

static void	createIrreducibleLoop (BlockFrequencyInfoImplBase &BFI, const IrreducibleGraph &G, LoopData OuterLoop, std::list< LoopData >::iterator Insert, const std::vector< const IrreducibleGraph::IrrNode > &SCC)

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "block-freq"

Definition at line 41 of file BlockFrequencyInfoImpl.cpp.

Function Documentation

◆ cleanup()

static void cleanup ( BlockFrequencyInfoImplBase & BFI )

static

Clear all memory not needed downstream.

Releases all memory not used downstream. In particular, saves Freqs.

Definition at line 304 of file BlockFrequencyInfoImpl.cpp.

Referenced by llvm::BlockFrequencyInfoImplBase::finalizeMetrics(), llvm::CrashRecoveryContext::registerCleanup(), and llvm::CrashRecoveryContext::unregisterCleanup().

◆ combineWeight()

static void combineWeight	(	Weight &	W,
		const Weight &	OtherW
	)

static

Definition at line 162 of file BlockFrequencyInfoImpl.cpp.

References assert(), and UINT64_MAX.

Referenced by combineWeightsByHashing(), and combineWeightsBySorting().

◆ combineWeights()

static void combineWeights ( WeightList & Weights )

static

Definition at line 218 of file BlockFrequencyInfoImpl.cpp.

References combineWeightsByHashing(), and combineWeightsBySorting().

Referenced by llvm::BlockFrequencyInfoImplBase::Distribution::normalize().

◆ combineWeightsByHashing()

static void combineWeightsByHashing ( WeightList & Weights )

static

Definition at line 199 of file BlockFrequencyInfoImpl.cpp.

References combineWeight(), I, and llvm::NextPowerOf2().

Referenced by combineWeights().

◆ combineWeightsBySorting()

static void combineWeightsBySorting ( WeightList & Weights )

static

Definition at line 178 of file BlockFrequencyInfoImpl.cpp.

References combineWeight(), I, and llvm::sort().

Referenced by combineWeights().

◆ convertFloatingToInteger()

static void convertFloatingToInteger	(	BlockFrequencyInfoImplBase &	BFI,
		const Scaled64 &	Min,
		const Scaled64 &	Max
	)

static

Definition at line 482 of file BlockFrequencyInfoImpl.cpp.

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

Referenced by llvm::BlockFrequencyInfoImplBase::finalizeMetrics().

◆ createIrreducibleLoop()

static void createIrreducibleLoop	(	BlockFrequencyInfoImplBase &	BFI,
		const IrreducibleGraph &	G,
		LoopData *	OuterLoop,
		std::list< LoopData >::iterator	Insert,
		const std::vector< const IrreducibleGraph::IrrNode * > &	SCC
	)

static

Definition at line 758 of file BlockFrequencyInfoImpl.cpp.

References llvm::dbgs(), findIrreducibleHeaders(), G, LLVM_DEBUG, and N.

Referenced by llvm::BlockFrequencyInfoImplBase::analyzeIrreducible().

◆ debugAssign()

static void debugAssign	(	const BlockFrequencyInfoImplBase &	BFI,
		const DitheringDistributer &	D,
		const BlockNode &	T,
		const BlockMass &	M,
		const char *	Desc
	)

static

Definition at line 435 of file BlockFrequencyInfoImpl.cpp.

References D, and llvm::dbgs().

Referenced by llvm::BlockFrequencyInfoImplBase::adjustLoopHeaderMass(), llvm::BlockFrequencyInfoImplBase::distributeIrrLoopHeaderMass(), and llvm::BlockFrequencyInfoImplBase::distributeMass().

◆ findIrreducibleHeaders()

static void findIrreducibleHeaders	(	const BlockFrequencyInfoImplBase &	BFI,
		const IrreducibleGraph &	G,
		const std::vector< const IrreducibleGraph::IrrNode * > &	SCC,
		LoopData::NodeList &	Headers,
		LoopData::NodeList &	Others
	)