include/llvm/Transforms/Scalar/BDCE.h

   1 //===---- BDCE.cpp - Bit-tracking dead code 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 the Bit-Tracking Dead Code Elimination pass. Some
  10 // instructions (shifts, some ands, ors, etc.) kill some of their input bits.
  11 // We track these dead bits and remove instructions that compute only these
  12 // dead bits.
  13 //
  14 //===----------------------------------------------------------------------===//
  15
  16 #ifndef LLVM_TRANSFORMS_SCALAR_BDCE_H
  17 #define LLVM_TRANSFORMS_SCALAR_BDCE_H
  18
  19 #include "llvm/IR/Function.h"
  20 #include "llvm/IR/PassManager.h"
  21
  22 namespace llvm {
  23
  24 // The Bit-Tracking Dead Code Elimination pass.
  25 struct BDCEPass : PassInfoMixin<BDCEPass> {
  26   PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
  27 };
  28 }
  29
  30 #endif // LLVM_TRANSFORMS_SCALAR_BDCE_H