GuardWidening.cpp File Reference

#include "llvm/Transforms/Scalar/GuardWidening.h"
#include <functional>
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DepthFirstIterator.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/BranchProbabilityInfo.h"
#include "llvm/Analysis/GuardUtils.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/LoopPass.h"
#include "llvm/Analysis/PostDominators.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/ConstantRange.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/PatternMatch.h"
#include "llvm/Pass.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/KnownBits.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/Utils/LoopUtils.h"

Include dependency graph for GuardWidening.cpp:

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Macros
#define	DEBUG_TYPE   "guard-widening"

Functions
	STATISTIC (GuardsEliminated, "Number of eliminated guards")
	STATISTIC (CondBranchEliminated, "Number of eliminated conditional branches")
	INITIALIZE_PASS_BEGIN (GuardWideningLegacyPass, "guard-widening", "Widen guards", false, false) if(WidenFrequentBranches) INITIALIZE_PASS_END(GuardWideningLegacyPass
guard Widen false	INITIALIZE_PASS_BEGIN (LoopGuardWideningLegacyPass, "loop-guard-widening", "Widen guards (within a single loop, as a loop pass)", false, false) if(WidenFrequentBranches) INITIALIZE_PASS_END(LoopGuardWideningLegacyPass
guard Widen false loop guard Widen	guards (within a single loop, as a loop pass)"

Variables
static cl::opt< bool >	WidenFrequentBranches ("guard-widening-widen-frequent-branches", cl::Hidden, cl::desc("Widen conditions of explicit branches into dominating guards in " "case if their taken frequency exceeds threshold set by " "guard-widening-frequent-branch-threshold option"), cl::init(false))
static cl::opt< unsigned >	FrequentBranchThreshold ("guard-widening-frequent-branch-threshold", cl::Hidden, cl::desc("When WidenFrequentBranches is set to true, this option is used " "to determine which branches are frequently taken. The criteria " "that a branch is taken more often than " "((FrequentBranchThreshold - 1) / FrequentBranchThreshold), then " "it is considered frequently taken"), cl::init(1000))
guard	widening
guard Widen	guards
guard Widen	false

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "guard-widening"

Definition at line 65 of file GuardWidening.cpp.

Function Documentation

guards()

guard Widen false loop guard Widen guards	(	within a single	loop,
		as a loop	pass
	)

INITIALIZE_PASS_BEGIN() [1/2]

INITIALIZE_PASS_BEGIN	(	GuardWideningLegacyPass	,
		"guard-widening"	,
		"Widen guards"	,
		false	,
		false
	)

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

INITIALIZE_PASS_BEGIN() [2/2]

guard Widen false INITIALIZE_PASS_BEGIN	(	LoopGuardWideningLegacyPass	,
		"loop-guard-widening"	,
		"Widen guards (within a single loop, as a loop pass)"	,
		false	,
		false
	)

STATISTIC() [1/2]

STATISTIC	(	GuardsEliminated	,
		"Number of eliminated guards"
	)

STATISTIC() [2/2]

STATISTIC	(	CondBranchEliminated	,
		"Number of eliminated conditional branches"
	)

Variable Documentation

false

guard Widen false loop guard Widen false

Definition at line 883 of file GuardWidening.cpp.

FrequentBranchThreshold

cl::opt<unsigned> FrequentBranchThreshold("guard-widening-frequent-branch-threshold", cl::Hidden, cl::desc("When WidenFrequentBranches is set to true, this option is used " "to determine which branches are frequently taken. The criteria " "that a branch is taken more often than " "((FrequentBranchThreshold - 1) / FrequentBranchThreshold), then " "it is considered frequently taken"), cl::init(1000))

static

guards

guard Widen guards

Definition at line 883 of file GuardWidening.cpp.

WidenFrequentBranches

cl::opt<bool> WidenFrequentBranches("guard-widening-widen-frequent-branches", cl::Hidden, cl::desc("Widen conditions of explicit branches into dominating guards in " "case if their taken frequency exceeds threshold set by " "guard-widening-frequent-branch-threshold option"), cl::init(false))

static

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

widening

guard Widen false loop guard widening

Definition at line 883 of file GuardWidening.cpp.