llvm/llvm/include/llvm/Analysis/ObjCARCAliasAnalysis.h

//===- ObjCARCAliasAnalysis.h - ObjC ARC Alias Analysis ---------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
/// \file
/// This file declares 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.
///
//===----------------------------------------------------------------------===//

#ifndef LLVM_ANALYSIS_OBJCARCALIASANALYSIS_H
#define LLVM_ANALYSIS_OBJCARCALIASANALYSIS_H

#include "llvm/Analysis/AliasAnalysis.h"

namespace llvm {
namespace objcarc {

/// This is a simple alias analysis implementation that uses knowledge
/// of ARC constructs to answer queries.
///
/// TODO: This class could be generalized to know about other ObjC-specific
/// tricks. Such as knowing that ivars in the non-fragile ABI are non-aliasing
/// even though their offsets are dynamic.
class ObjCARCAAResult : public AAResultBase { … };

/// Analysis pass providing a never-invalidated alias analysis result.
class ObjCARCAA : public AnalysisInfoMixin<ObjCARCAA> { … };

} // namespace objcarc
} // namespace llvm

#endif