DependencyAnalysis.h File Reference

#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/Analysis/ObjCARCInstKind.h"

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Namespaces
	llvm
	This file implements support for optimizing divisions by a constant.
	llvm::objcarc

Enumerations
enum	llvm::objcarc::DependenceKind {   llvm::objcarc::NeedsPositiveRetainCount, llvm::objcarc::AutoreleasePoolBoundary, llvm::objcarc::CanChangeRetainCount, llvm::objcarc::RetainAutoreleaseDep,   llvm::objcarc::RetainAutoreleaseRVDep, llvm::objcarc::RetainRVDep }

Functions
llvm::Instruction *	llvm::objcarc::findSingleDependency (DependenceKind Flavor, const Value *Arg, BasicBlock *StartBB, Instruction *StartInst, ProvenanceAnalysis &PA)
	Find dependent instructions. More...
bool	llvm::objcarc::Depends (DependenceKind Flavor, Instruction *Inst, const Value *Arg, ProvenanceAnalysis &PA)
	Test if there can be dependencies on Inst through Arg. More...
bool	llvm::objcarc::CanUse (const Instruction *Inst, const Value *Ptr, ProvenanceAnalysis &PA, ARCInstKind Class)
	Test whether the given instruction can "use" the given pointer's object in a way that requires the reference count to be positive. More...
bool	llvm::objcarc::CanAlterRefCount (const Instruction *Inst, const Value *Ptr, ProvenanceAnalysis &PA, ARCInstKind Class)
	Test whether the given instruction can result in a reference count modification (positive or negative) for the pointer's object. More...
bool	llvm::objcarc::CanDecrementRefCount (const Instruction *Inst, const Value *Ptr, ProvenanceAnalysis &PA, ARCInstKind Class)
	Returns true if we can not conservatively prove that Inst can not decrement the reference count of Ptr. More...
static bool	llvm::objcarc::CanDecrementRefCount (const Instruction *Inst, const Value *Ptr, ProvenanceAnalysis &PA)

Detailed Description

This file declares special dependency analysis routines used in Objective C ARC Optimizations.

WARNING: This file knows about certain library functions. It recognizes them by name, and hardwires knowledge of their semantics.

WARNING: This file knows about how certain Objective-C library functions are used. Naive LLVM IR transformations which would otherwise be behavior-preserving may break these assumptions.

Definition in file DependencyAnalysis.h.