FunctionSpecialization.cpp File Reference

#include "llvm/Transforms/IPO/FunctionSpecialization.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/CodeMetrics.h"
#include "llvm/Analysis/InlineCost.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/Analysis/ValueLattice.h"
#include "llvm/Analysis/ValueLatticeUtils.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/Transforms/Scalar/SCCP.h"
#include "llvm/Transforms/Utils/Cloning.h"
#include "llvm/Transforms/Utils/SCCPSolver.h"
#include "llvm/Transforms/Utils/SizeOpts.h"
#include <cmath>

Include dependency graph for FunctionSpecialization.cpp:

Go to the source code of this file.

Classes
struct	llvm::DenseMapInfo< SpecSig >

Macros
#define	DEBUG_TYPE   "function-specialization"

Functions
	STATISTIC (NumSpecsCreated, "Number of specializations created")
static void	removeSSACopy (Function &F)
static Function *	cloneCandidateFunction (Function *F)
	Clone the function F and remove the ssa_copy intrinsics added by the SCCPSolver in the cloned version.
static InstructionCost	getUserBonus (User *U, llvm::TargetTransformInfo &TTI, const LoopInfo &LI)

Variables
static cl::opt< bool >	ForceSpecialization ("force-specialization", cl::init(false), cl::Hidden, cl::desc("Force function specialization for every call site with a constant " "argument"))
static cl::opt< unsigned >	MaxClones ("funcspec-max-clones", cl::init(3), cl::Hidden, cl::desc("The maximum number of clones allowed for a single function " "specialization"))
static cl::opt< unsigned >	MinFunctionSize ("funcspec-min-function-size", cl::init(100), cl::Hidden, cl::desc("Don't specialize functions that have less than this number of " "instructions"))
static cl::opt< unsigned >	AvgLoopIters ("funcspec-avg-loop-iters", cl::init(10), cl::Hidden, cl::desc("Average loop iteration count"))
static cl::opt< bool >	SpecializeOnAddress ("funcspec-on-address", cl::init(false), cl::Hidden, cl::desc("Enable function specialization on the address of global values"))
static cl::opt< bool >	SpecializeLiteralConstant ("funcspec-for-literal-constant", cl::init(false), cl::Hidden, cl::desc("Enable specialization of functions that take a literal constant as an " "argument"))

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "function-specialization"

Definition at line 65 of file FunctionSpecialization.cpp.

Function Documentation

cloneCandidateFunction()

static Function * cloneCandidateFunction ( Function *  F )

static

Clone the function F and remove the ssa_copy intrinsics added by the SCCPSolver in the cloned version.

Definition at line 402 of file FunctionSpecialization.cpp.

References llvm::CloneFunction(), F, Mappings, and removeSSACopy().

getUserBonus()

static InstructionCost getUserBonus ( User *  U, llvm::TargetTransformInfo &  TTI, const LoopInfo &  LI  )

static

Definition at line 568 of file FunctionSpecialization.cpp.

References AvgLoopIters, Cost, llvm::TargetTransformInfo::getInstructionCost(), llvm::LoopInfoBase< BlockT, LoopT >::getLoopDepth(), getUserBonus(), I, and llvm::TargetTransformInfo::TCK_SizeAndLatency.

Referenced by getUserBonus().

removeSSACopy()

static void removeSSACopy ( Function &  F )

static

Definition at line 218 of file FunctionSpecialization.cpp.

References F, and llvm::make_early_inc_range().

Referenced by cloneCandidateFunction().

STATISTIC()

STATISTIC	(	NumSpecsCreated	,
		"Number of specializations created"
	)

Variable Documentation

AvgLoopIters

cl::opt< unsigned > AvgLoopIters("funcspec-avg-loop-iters", cl::init(10), cl::Hidden, cl::desc( "Average loop iteration count")) ( "funcspec-avg-loop-iters"  , cl::init(10)  , cl::Hidden  , cl::desc( "Average loop iteration count")    )

static

Referenced by getUserBonus().

ForceSpecialization

cl::opt< bool > ForceSpecialization("force-specialization", cl::init(false), cl::Hidden, cl::desc( "Force function specialization for every call site with a constant " "argument")) ( "force-specialization"  , cl::init(false)  , cl::Hidden  , cl::desc( "Force function specialization for every call site with a constant " "argument")    )

static

MaxClones

cl::opt< unsigned > MaxClones("funcspec-max-clones", cl::init(3), cl::Hidden, cl::desc( "The maximum number of clones allowed for a single function " "specialization")) ( "funcspec-max-clones"  , cl::init(3)  , cl::Hidden  , cl::desc( "The maximum number of clones allowed for a single function " "specialization")    )

static

Referenced by llvm::FunctionSpecializer::run().

MinFunctionSize

cl::opt< unsigned > MinFunctionSize("funcspec-min-function-size", cl::init(100), cl::Hidden, cl::desc( "Don't specialize functions that have less than this number of " "instructions")) ( "funcspec-min-function-size"  , cl::init(100)  , cl::Hidden  , cl::desc( "Don't specialize functions that have less than this number of " "instructions")    )

static

SpecializeLiteralConstant

cl::opt< bool > SpecializeLiteralConstant("funcspec-for-literal-constant", cl::init(false), cl::Hidden, cl::desc( "Enable specialization of functions that take a literal constant as an " "argument")) ( "funcspec-for-literal-constant"  , cl::init(false)  , cl::Hidden  , cl::desc( "Enable specialization of functions that take a literal constant as an " "argument")    )

static

SpecializeOnAddress

cl::opt< bool > SpecializeOnAddress("funcspec-on-address", cl::init(false), cl::Hidden, cl::desc( "Enable function specialization on the address of global values")) ( "funcspec-on-address"  , cl::init(false)  , cl::Hidden  , cl::desc( "Enable function specialization on the address of global values")    )

static