ObjCARCAliasAnalysis.cpp File Reference

This file defines a simple ARC-aware AliasAnalysis using special knowledge of Objective C to enhance other optimization passes which rely on the Alias Analysis infrastructure. More...

#include "llvm/Analysis/ObjCARCAliasAnalysis.h"
#include "llvm/Analysis/ObjCARCAnalysisUtils.h"
#include "llvm/Analysis/Passes.h"
#include "llvm/IR/Function.h"
#include "llvm/InitializePasses.h"
#include "llvm/Pass.h"

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Macros
#define	DEBUG_TYPE   "objc-arc-aa"

Detailed Description

This file defines a simple ARC-aware AliasAnalysis using special knowledge of Objective C to enhance other optimization passes which rely on the Alias Analysis infrastructure.

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.

TODO: Theoretically we could check for dependencies between objc_* calls and FMRB_OnlyAccessesArgumentPointees calls or other well-behaved calls.

TODO: The calls here to AAResultBase member functions are all effectively no-ops that just return a conservative result. The original intent was to chain to another analysis for a recursive query, but this was lost in a refactor. These should instead be rephrased in terms of queries to AAQI.AAR.

Definition in file ObjCARCAliasAnalysis.cpp.

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "objc-arc-aa"

Definition at line 37 of file ObjCARCAliasAnalysis.cpp.