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//===- ReachableCode.h -----------------------------------------*- 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
//
//===----------------------------------------------------------------------===//
//
// A flow-sensitive, path-insensitive analysis of unreachable code.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_ANALYSIS_ANALYSES_REACHABLECODE_H
#define LLVM_CLANG_ANALYSIS_ANALYSES_REACHABLECODE_H
#include "clang/Basic/SourceLocation.h"
//===----------------------------------------------------------------------===//
// Forward declarations.
//===----------------------------------------------------------------------===//
namespace llvm {
class BitVector;
}
namespace clang {
class AnalysisDeclContext;
class CFGBlock;
class Preprocessor;
}
//===----------------------------------------------------------------------===//
// API.
//===----------------------------------------------------------------------===//
namespace clang {
namespace reachable_code {
/// Classifications of unreachable code.
enum UnreachableKind {
UK_Return,
UK_Break,
UK_Loop_Increment,
UK_Other
};
class Callback {
virtual void anchor();
public:
virtual ~Callback() {}
virtual void HandleUnreachable(UnreachableKind UK,
SourceLocation L,
SourceRange ConditionVal,
SourceRange R1,
SourceRange R2) = 0;
};
/// ScanReachableFromBlock - Mark all blocks reachable from Start.
/// Returns the total number of blocks that were marked reachable.
unsigned ScanReachableFromBlock(const CFGBlock *Start,
llvm::BitVector &Reachable);
void FindUnreachableCode(AnalysisDeclContext &AC, Preprocessor &PP,
Callback &CB);
}} // end namespace clang::reachable_code
#endif
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