DFAJumpThreading.cpp File Reference

#include "llvm/Transforms/Scalar/DFAJumpThreading.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/AssumptionCache.h"
#include "llvm/Analysis/CodeMetrics.h"
#include "llvm/Analysis/DomTreeUpdater.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/OptimizationRemarkEmitter.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/IR/CFG.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Transforms/Utils/Cloning.h"
#include "llvm/Transforms/Utils/SSAUpdaterBulk.h"
#include "llvm/Transforms/Utils/ValueMapper.h"
#include <deque>

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "dfa-jump-threading"

Functions
	STATISTIC (NumTransforms, "Number of transformations done")
	STATISTIC (NumCloned, "Number of blocks cloned")
	STATISTIC (NumPaths, "Number of individual paths threaded")

Variables
static cl::opt< bool >	ClViewCfgBefore ("dfa-jump-view-cfg-before", cl::desc("View the CFG before DFA Jump Threading"), cl::Hidden, cl::init(false))
static cl::opt< bool >	EarlyExitHeuristic ("dfa-early-exit-heuristic", cl::desc("Exit early if an unpredictable value come from the same loop"), cl::Hidden, cl::init(true))
static cl::opt< unsigned >	MaxPathLength ("dfa-max-path-length", cl::desc("Max number of blocks searched to find a threading path"), cl::Hidden, cl::init(20))
static cl::opt< unsigned >	MaxNumVisitiedPaths ("dfa-max-num-visited-paths", cl::desc("Max number of blocks visited while enumerating paths around a switch"), cl::Hidden, cl::init(2500))
static cl::opt< unsigned >	MaxNumPaths ("dfa-max-num-paths", cl::desc("Max number of paths enumerated around a switch"), cl::Hidden, cl::init(200))
static cl::opt< unsigned >	CostThreshold ("dfa-cost-threshold", cl::desc("Maximum cost accepted for the transformation"), cl::Hidden, cl::init(50))

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "dfa-jump-threading"

Definition at line 87 of file DFAJumpThreading.cpp.

Function Documentation

STATISTIC() [1/3]

STATISTIC	(	NumCloned	,
		"Number of blocks cloned"
	)

STATISTIC() [2/3]

STATISTIC	(	NumPaths	,
		"Number of individual paths threaded"
	)

STATISTIC() [3/3]

STATISTIC	(	NumTransforms	,
		"Number of transformations done"
	)

Variable Documentation

ClViewCfgBefore

cl::opt< bool > ClViewCfgBefore("dfa-jump-view-cfg-before", cl::desc("View the CFG before DFA Jump Threading"), cl::Hidden, cl::init(false)) ( "dfa-jump-view-cfg-before"  , cl::desc("View the CFG before DFA Jump Threading")  , cl::Hidden  , cl::init(false)    )

static

CostThreshold

cl::opt< unsigned > CostThreshold("dfa-cost-threshold", cl::desc("Maximum cost accepted for the transformation"), cl::Hidden, cl::init(50)) ( "dfa-cost-threshold"  , cl::desc("Maximum cost accepted for the transformation")  , cl::Hidden  , cl::init(50)    )

static

Referenced by llvm::AMDGPUTargetLowering::allUsesHaveSourceMods(), allUsesHaveSourceMods(), and llvm::TargetLowering::getCheaperOrNeutralNegatedExpression().

EarlyExitHeuristic

cl::opt< bool > EarlyExitHeuristic("dfa-early-exit-heuristic", cl::desc("Exit early if an unpredictable value come from the same loop"), cl::Hidden, cl::init(true)) ( "dfa-early-exit-heuristic"  , cl::desc("Exit early if an unpredictable value come from the same loop")  , cl::Hidden  , cl::init(true)    )

static

MaxNumPaths

cl::opt< unsigned > MaxNumPaths("dfa-max-num-paths", cl::desc("Max number of paths enumerated around a switch"), cl::Hidden, cl::init(200)) ( "dfa-max-num-paths"  , cl::desc("Max number of paths enumerated around a switch")  , cl::Hidden  , cl::init(200)    )

static

MaxNumVisitiedPaths

cl::opt< unsigned > MaxNumVisitiedPaths("dfa-max-num-visited-paths", cl::desc( "Max number of blocks visited while enumerating paths around a switch"), cl::Hidden, cl::init(2500)) ( "dfa-max-num-visited-paths"  , cl::desc( "Max number of blocks visited while enumerating paths around a switch")  , cl::Hidden  , cl::init(2500)    )

static

MaxPathLength

cl::opt< unsigned > MaxPathLength("dfa-max-path-length", cl::desc("Max number of blocks searched to find a threading path"), cl::Hidden, cl::init(20)) ( "dfa-max-path-length"  , cl::desc("Max number of blocks searched to find a threading path")  , cl::Hidden  , cl::init(20)    )

static