llvm::objcarc::BottomUpPtrState Struct Reference

#include "Transforms/ObjCARC/PtrState.h"

Inheritance diagram for llvm::objcarc::BottomUpPtrState:

Collaboration diagram for llvm::objcarc::BottomUpPtrState:

Public Member Functions
	BottomUpPtrState ()=default
bool	InitBottomUp (ARCMDKindCache &Cache, Instruction *I)
	(Re-)Initialize this bottom up pointer returning true if we detected a pointer with nested releases. More...
bool	MatchWithRetain ()
	Return true if this set of releases can be paired with a release. More...
void	HandlePotentialUse (BasicBlock *BB, 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 169 of file PtrState.h.

Constructor & Destructor Documentation

BottomUpPtrState()

llvm::objcarc::BottomUpPtrState::BottomUpPtrState ( )

default

Member Function Documentation

HandlePotentialAlterRefCount()

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

Definition at line 229 of file PtrState.cpp.

References llvm::objcarc::CanAlterRefCount(), 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().

HandlePotentialUse()

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

Definition at line 257 of file PtrState.cpp.

References assert(), llvm::objcarc::Call, llvm::objcarc::CanUse(), llvm::dbgs(), llvm::BasicBlock::end(), llvm::objcarc::GetBasicARCInstKind(), llvm::BasicBlock::getFirstInsertionPt(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::objcarc::getreturnRVOperand(), llvm::objcarc::IsUser(), 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().

InitBottomUp()

bool BottomUpPtrState::InitBottomUp	(	ARCMDKindCache &	Cache,
		Instruction *	I
	)

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

Definition at line 178 of file PtrState.cpp.

References llvm::dbgs(), llvm::objcarc::ARCMDKindCache::get(), llvm::Instruction::getMetadata(), llvm::objcarc::ImpreciseRelease, LLVM_DEBUG, llvm::objcarc::RRInfo::ReleaseMetadata, llvm::objcarc::S_MovableRelease, and llvm::objcarc::S_Release.

Referenced by CheckForCanReleaseCFGHazard().

MatchWithRetain()

bool BottomUpPtrState::MatchWithRetain

(

)

Return true if this set of releases can be paired with a release.

Modifies state appropriately to reflect that the matching occurred if it is successful.

It is assumed that one has already checked that the RCIdentity of the retain and the RCIdentity of this ptr state are the same.

Definition at line 205 of file PtrState.cpp.

References LLVM_FALLTHROUGH, 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().

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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