| //===---- BDCE.cpp - Bit-tracking dead code elimination ---------*- 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 implements the Bit-Tracking Dead Code Elimination pass. Some |
| // instructions (shifts, some ands, ors, etc.) kill some of their input bits. |
| // We track these dead bits and remove instructions that compute only these |
| // dead bits. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_TRANSFORMS_SCALAR_BDCE_H |
| #define LLVM_TRANSFORMS_SCALAR_BDCE_H |
| |
| #include "llvm/IR/Function.h" |
| #include "llvm/IR/PassManager.h" |
| |
| namespace llvm { |
| |
| // The Bit-Tracking Dead Code Elimination pass. |
| struct BDCEPass : PassInfoMixin<BDCEPass> { |
| PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM); |
| }; |
| } |
| |
| #endif // LLVM_TRANSFORMS_SCALAR_BDCE_H |
