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  1. //===-- NoopAnalysis.h ------------------------------------------*- C++ -*-===//
  2. //
  3. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4. // See https://llvm.org/LICENSE.txt for license information.
  5. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6. //
  7. //===----------------------------------------------------------------------===//
  8. //
  9. //  This file defines a NoopAnalysis class that just uses the builtin transfer.
  10. //
  11. //===----------------------------------------------------------------------===//
  12.  
  13. #ifndef LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_NOOPANALYSIS_H
  14. #define LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_NOOPANALYSIS_H
  15.  
  16. #include "clang/AST/ASTContext.h"
  17. #include "clang/Analysis/CFG.h"
  18. #include "clang/Analysis/FlowSensitive/DataflowAnalysis.h"
  19. #include "clang/Analysis/FlowSensitive/DataflowEnvironment.h"
  20. #include "clang/Analysis/FlowSensitive/NoopLattice.h"
  21.  
  22. namespace clang {
  23. namespace dataflow {
  24.  
  25. class NoopAnalysis : public DataflowAnalysis<NoopAnalysis, NoopLattice> {
  26. public:
  27.   /// Deprecated. Use the `DataflowAnalysisOptions` constructor instead.
  28.   NoopAnalysis(ASTContext &Context, bool ApplyBuiltinTransfer)
  29.       : DataflowAnalysis<NoopAnalysis, NoopLattice>(Context,
  30.                                                     ApplyBuiltinTransfer) {}
  31.  
  32.   /// `ApplyBuiltinTransfer` controls whether to run the built-in transfer
  33.   /// functions that model memory during the analysis. Their results are not
  34.   /// used by `NoopAnalysis`, but tests that need to inspect the environment
  35.   /// should enable them.
  36.   NoopAnalysis(ASTContext &Context, DataflowAnalysisOptions Options)
  37.       : DataflowAnalysis<NoopAnalysis, NoopLattice>(Context, Options) {}
  38.  
  39.   static NoopLattice initialElement() { return {}; }
  40.  
  41.   void transfer(const CFGElement *E, NoopLattice &L, Environment &Env) {}
  42. };
  43.  
  44. } // namespace dataflow
  45. } // namespace clang
  46.  
  47. #endif // LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_NOOPANALYSIS_H
  48.