59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
//===-- NoopAnalysis.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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines a NoopAnalysis class that is used by dataflow analysis
|
|
// tests.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CLANG_UNITTESTS_ANALYSIS_FLOWSENSITIVE_NOOPANALYSIS_H
|
|
#define LLVM_CLANG_UNITTESTS_ANALYSIS_FLOWSENSITIVE_NOOPANALYSIS_H
|
|
|
|
#include "clang/AST/ASTContext.h"
|
|
#include "clang/AST/Stmt.h"
|
|
#include "clang/Analysis/FlowSensitive/DataflowAnalysis.h"
|
|
#include "clang/Analysis/FlowSensitive/DataflowEnvironment.h"
|
|
#include "clang/Analysis/FlowSensitive/DataflowLattice.h"
|
|
#include <ostream>
|
|
|
|
namespace clang {
|
|
namespace dataflow {
|
|
|
|
class NoopLattice {
|
|
public:
|
|
bool operator==(const NoopLattice &) const { return true; }
|
|
|
|
LatticeJoinEffect join(const NoopLattice &) {
|
|
return LatticeJoinEffect::Unchanged;
|
|
}
|
|
};
|
|
|
|
inline std::ostream &operator<<(std::ostream &OS, const NoopLattice &) {
|
|
return OS << "noop";
|
|
}
|
|
|
|
class NoopAnalysis : public DataflowAnalysis<NoopAnalysis, NoopLattice> {
|
|
public:
|
|
/// `ApplyBuiltinTransfer` controls whether to run the built-in transfer
|
|
/// functions that model memory during the analysis. Their results are not
|
|
/// used by `NoopAnalysis`, but tests that need to inspect the environment
|
|
/// should enable them.
|
|
NoopAnalysis(ASTContext &Context, bool ApplyBuiltinTransfer)
|
|
: DataflowAnalysis<NoopAnalysis, NoopLattice>(Context,
|
|
ApplyBuiltinTransfer) {}
|
|
|
|
static NoopLattice initialElement() { return {}; }
|
|
|
|
void transfer(const Stmt *S, NoopLattice &E, Environment &Env) {}
|
|
};
|
|
|
|
} // namespace dataflow
|
|
} // namespace clang
|
|
|
|
#endif // LLVM_CLANG_UNITTESTS_ANALYSIS_FLOWSENSITIVE_NOOPANALYSIS_H
|