BDCE.h 1.2 KB

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  1. #pragma once
  2. #ifdef __GNUC__
  3. #pragma GCC diagnostic push
  4. #pragma GCC diagnostic ignored "-Wunused-parameter"
  5. #endif
  6. //===---- BDCE.cpp - Bit-tracking dead code elimination ---------*- C++ -*-===//
  7. //
  8. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  9. // See https://llvm.org/LICENSE.txt for license information.
  10. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  11. //
  12. //===----------------------------------------------------------------------===//
  13. //
  14. // This file implements the Bit-Tracking Dead Code Elimination pass. Some
  15. // instructions (shifts, some ands, ors, etc.) kill some of their input bits.
  16. // We track these dead bits and remove instructions that compute only these
  17. // dead bits.
  18. //
  19. //===----------------------------------------------------------------------===//
  20. #ifndef LLVM_TRANSFORMS_SCALAR_BDCE_H
  21. #define LLVM_TRANSFORMS_SCALAR_BDCE_H
  22. #include "llvm/IR/Function.h"
  23. #include "llvm/IR/PassManager.h"
  24. namespace llvm {
  25. // The Bit-Tracking Dead Code Elimination pass.
  26. struct BDCEPass : PassInfoMixin<BDCEPass> {
  27. PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
  28. };
  29. }
  30. #endif // LLVM_TRANSFORMS_SCALAR_BDCE_H
  31. #ifdef __GNUC__
  32. #pragma GCC diagnostic pop
  33. #endif