LLVM: llvm::objcarc::TopDownPtrState Struct Reference

LLVM 8.0.1

#include "Transforms/ObjCARC/PtrState.h"

Inheritance diagram for llvm::objcarc::TopDownPtrState:

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Collaboration diagram for llvm::objcarc::TopDownPtrState:

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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. More...

bool	MatchWithRelease (ARCMDKindCache &Cache, Instruction *Release)
	Return true if this set of retains can be paired with the given release. More...

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

bool	HandlePotentialAlterRefCount (Instruction Inst, const Value Ptr, ProvenanceAnalysis &PA, ARCInstKind Class)

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. More...

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. More...

unsigned char	Seq: 8
	The current position in the sequence. More...

RRInfo	RRI
	Unidirectional information about the current sequence. More...

Detailed Description

Definition at line 190 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
	)

Definition at line 377 of file PtrState.cpp.

References assert(), llvm::objcarc::CanAlterRefCount(), llvm::dbgs(), llvm::objcarc::IntrinsicUser, LLVM_DEBUG, llvm_unreachable, llvm::objcarc::S_CanRelease, llvm::objcarc::S_MovableRelease, llvm::objcarc::S_None, llvm::objcarc::S_Release, llvm::objcarc::S_Retain, llvm::objcarc::S_Stop, and llvm::objcarc::S_Use.

Referenced by CheckForCanReleaseCFGHazard().

◆ HandlePotentialUse()

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

Definition at line 412 of file PtrState.cpp.

References llvm::objcarc::CanUse(), llvm::dbgs(), LLVM_DEBUG, llvm_unreachable, llvm::objcarc::S_CanRelease, llvm::objcarc::S_MovableRelease, llvm::objcarc::S_None, llvm::objcarc::S_Release, llvm::objcarc::S_Retain, llvm::objcarc::S_Stop, and llvm::objcarc::S_Use.

Referenced by CheckForCanReleaseCFGHazard().

◆ 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 323 of file PtrState.cpp.

References llvm::objcarc::RetainRV, and llvm::objcarc::S_Retain.

Referenced by CheckForCanReleaseCFGHazard().

◆ 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 348 of file PtrState.cpp.

References llvm::objcarc::ARCMDKindCache::get(), llvm::Instruction::getMetadata(), llvm::objcarc::ImpreciseRelease, LLVM_FALLTHROUGH, llvm_unreachable, llvm::objcarc::RRInfo::ReleaseMetadata, llvm::objcarc::S_CanRelease, llvm::objcarc::S_MovableRelease, llvm::objcarc::S_None, llvm::objcarc::S_Release, llvm::objcarc::S_Retain, llvm::objcarc::S_Stop, and llvm::objcarc::S_Use.

Referenced by CheckForCanReleaseCFGHazard().

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

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