llvm::objcarc::TopDownPtrState Struct Reference

#include "Transforms/ObjCARC/PtrState.h"

Inheritance diagram for llvm::objcarc::TopDownPtrState:

Public Member Functions
	TopDownPtrState ()=default
bool	InitTopDown (ARCInstKind Kind, Instruction *I)
	(Re-)Initialize this bottom up pointer returning true if we detected a pointer with nested releases.
bool	MatchWithRelease (ARCMDKindCache &Cache, Instruction *Release)
	Return true if this set of retains can be paired with the given release.
void	HandlePotentialUse (Instruction *Inst, const Value *Ptr, ProvenanceAnalysis &PA, ARCInstKind Class)
bool	HandlePotentialAlterRefCount (Instruction *Inst, const Value *Ptr, ProvenanceAnalysis &PA, ARCInstKind Class, const BundledRetainClaimRVs &BundledRVs)
Public Member Functions inherited from llvm::objcarc::PtrState
bool	IsKnownSafe () const
void	SetKnownSafe (const bool NewValue)
bool	IsTailCallRelease () const
void	SetTailCallRelease (const bool NewValue)
bool	IsTrackingImpreciseReleases () const
const MDNode *	GetReleaseMetadata () const
void	SetReleaseMetadata (MDNode *NewValue)
bool	IsCFGHazardAfflicted () const
void	SetCFGHazardAfflicted (const bool NewValue)
void	SetKnownPositiveRefCount ()
void	ClearKnownPositiveRefCount ()
bool	HasKnownPositiveRefCount () const
void	SetSeq (Sequence NewSeq)
Sequence	GetSeq () const
void	ClearSequenceProgress ()
void	ResetSequenceProgress (Sequence NewSeq)
void	Merge (const PtrState &Other, bool TopDown)
void	InsertCall (Instruction *I)
void	InsertReverseInsertPt (Instruction *I)
void	ClearReverseInsertPts ()
bool	HasReverseInsertPts () const
const RRInfo &	GetRRInfo () const

Additional Inherited Members
Protected Member Functions inherited from llvm::objcarc::PtrState
	PtrState ()
Protected Attributes inherited from llvm::objcarc::PtrState
bool	KnownPositiveRefCount = false
	True if the reference count is known to be incremented.
bool	Partial = false
	True if we've seen an opportunity for partial RR elimination, such as pushing calls into a CFG triangle or into one side of a CFG diamond.
unsigned char	Seq: 8
	The current position in the sequence.
RRInfo	RRI
	Unidirectional information about the current sequence.

Detailed Description

Definition at line 189 of file PtrState.h.

Constructor & Destructor Documentation

TopDownPtrState()

llvm::objcarc::TopDownPtrState::TopDownPtrState ( )

default

Member Function Documentation

HandlePotentialAlterRefCount()

bool TopDownPtrState::HandlePotentialAlterRefCount	(	Instruction *	Inst,
		const Value *	Ptr,
		ProvenanceAnalysis &	PA,
		ARCInstKind	Class,
		const BundledRetainClaimRVs &	BundledRVs
	)

Definition at line 377 of file PtrState.cpp.

References assert(), llvm::objcarc::CanDecrementRefCount(), llvm::objcarc::PtrState::ClearKnownPositiveRefCount(), llvm::objcarc::BundledRetainClaimRVs::contains(), llvm::dbgs(), llvm::objcarc::PtrState::GetSeq(), llvm::objcarc::PtrState::HasReverseInsertPts(), llvm::objcarc::PtrState::InsertReverseInsertPt(), llvm::objcarc::IntrinsicUser, LLVM_DEBUG, llvm_unreachable, Ptr, llvm::objcarc::S_CanRelease, llvm::objcarc::S_MovableRelease, llvm::objcarc::S_None, llvm::objcarc::S_Retain, llvm::objcarc::S_Stop, llvm::objcarc::S_Use, llvm::objcarc::PtrState::SetCFGHazardAfflicted(), and llvm::objcarc::PtrState::SetSeq().

HandlePotentialUse()

void TopDownPtrState::HandlePotentialUse	(	Instruction *	Inst,
		const Value *	Ptr,
		ProvenanceAnalysis &	PA,
		ARCInstKind	Class
	)

Definition at line 416 of file PtrState.cpp.

References llvm::objcarc::CanUse(), llvm::dbgs(), llvm::objcarc::PtrState::GetSeq(), LLVM_DEBUG, llvm_unreachable, Ptr, llvm::objcarc::S_CanRelease, llvm::objcarc::S_MovableRelease, llvm::objcarc::S_None, llvm::objcarc::S_Retain, llvm::objcarc::S_Stop, llvm::objcarc::S_Use, and llvm::objcarc::PtrState::SetSeq().

InitTopDown()

bool TopDownPtrState::InitTopDown	(	ARCInstKind	Kind,
		Instruction *	I
	)

(Re-)Initialize this bottom up pointer returning true if we detected a pointer with nested releases.

Definition at line 324 of file PtrState.cpp.

References llvm::objcarc::PtrState::GetSeq(), llvm::objcarc::PtrState::HasKnownPositiveRefCount(), I, llvm::objcarc::PtrState::InsertCall(), llvm::objcarc::PtrState::ResetSequenceProgress(), llvm::objcarc::RetainRV, llvm::objcarc::S_Retain, llvm::objcarc::PtrState::SetKnownPositiveRefCount(), and llvm::objcarc::PtrState::SetKnownSafe().

MatchWithRelease()

bool TopDownPtrState::MatchWithRelease	(	ARCMDKindCache &	Cache,
		Instruction *	Release
	)

Return true if this set of retains can be paired with the given release.

Modifies state appropriately to reflect that the matching occurred.

Definition at line 349 of file PtrState.cpp.

References llvm::objcarc::PtrState::ClearKnownPositiveRefCount(), llvm::objcarc::PtrState::ClearReverseInsertPts(), llvm::objcarc::ARCMDKindCache::get(), llvm::objcarc::PtrState::GetSeq(), llvm::objcarc::ImpreciseRelease, llvm_unreachable, llvm::objcarc::Release, llvm::objcarc::S_CanRelease, llvm::objcarc::S_MovableRelease, llvm::objcarc::S_None, llvm::objcarc::S_Retain, llvm::objcarc::S_Stop, llvm::objcarc::S_Use, llvm::objcarc::PtrState::SetReleaseMetadata(), and llvm::objcarc::PtrState::SetTailCallRelease().

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

• lib/Transforms/ObjCARC/PtrState.h
• lib/Transforms/ObjCARC/PtrState.cpp