This file declares special dependency analysis routines used in Objective C ARC Optimizations. More...
Include dependency graph for DependencyAnalysis.h:
This graph shows which files directly or indirectly include this file:
Go to the source code of this file.
Namespaces | |
| llvm | |
| This class represents lattice values for constants. | |
| 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 } |
| Defines different dependence kinds among various ARC constructs. More... | |
Functions | |
| void | llvm::objcarc::FindDependencies (DependenceKind Flavor, const Value *Arg, BasicBlock *StartBB, Instruction *StartInst, SmallPtrSetImpl< Instruction *> &DependingInstructions, SmallPtrSetImpl< const BasicBlock *> &Visited, ProvenanceAnalysis &PA) |
| Walk up the CFG from StartPos (which is in StartBB) and find local and non-local dependencies on Arg. 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.
