| //===---- BDCE.cpp - Bit-tracking dead code elimination ---------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // 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 |