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  1. //===- DeadStoreElimination.h - Fast Dead Store Elimination -----*- 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 implements a trivial dead store elimination that only considers
  10. // basic-block local redundant stores.
  11. //
  12. // FIXME: This should eventually be extended to be a post-dominator tree
  13. // traversal.  Doing so would be pretty trivial.
  14. //
  15. //===----------------------------------------------------------------------===//
  16.  
  17. #ifndef LLVM_TRANSFORMS_SCALAR_DEADSTOREELIMINATION_H
  18. #define LLVM_TRANSFORMS_SCALAR_DEADSTOREELIMINATION_H
  19.  
  20. #include "llvm/IR/PassManager.h"
  21.  
  22. namespace llvm {
  23.  
  24. class Function;
  25.  
  26. /// This class implements a trivial dead store elimination. We consider
  27. /// only the redundant stores that are local to a single Basic Block.
  28. class DSEPass : public PassInfoMixin<DSEPass> {
  29. public:
  30.   PreservedAnalyses run(Function &F, FunctionAnalysisManager &FAM);
  31. };
  32.  
  33. } // end namespace llvm
  34.  
  35. #endif // LLVM_TRANSFORMS_SCALAR_DEADSTOREELIMINATION_H
  36.