| //===- EarlyCSE.h - Simple and fast CSE pass --------------------*- 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 |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| /// \file |
| /// This file provides the interface for a simple, fast CSE pass. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_TRANSFORMS_SCALAR_EARLYCSE_H |
| #define LLVM_TRANSFORMS_SCALAR_EARLYCSE_H |
| |
| #include "llvm/IR/PassManager.h" |
| |
| namespace llvm { |
| |
| class Function; |
| |
| /// A simple and fast domtree-based CSE pass. |
| /// |
| /// This pass does a simple depth-first walk over the dominator tree, |
| /// eliminating trivially redundant instructions and using instsimplify to |
| /// canonicalize things as it goes. It is intended to be fast and catch obvious |
| /// cases so that instcombine and other passes are more effective. It is |
| /// expected that a later pass of GVN will catch the interesting/hard cases. |
| struct EarlyCSEPass : PassInfoMixin<EarlyCSEPass> { |
| EarlyCSEPass(bool UseMemorySSA = false) : UseMemorySSA(UseMemorySSA) {} |
| |
| /// Run the pass over the function. |
| PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM); |
| |
| bool UseMemorySSA; |
| }; |
| |
| } // end namespace llvm |
| |
| #endif // LLVM_TRANSFORMS_SCALAR_EARLYCSE_H |