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File indexing completed on 2026-05-10 08:44:41
0001 //===- EarlyCSE.h - Simple and fast CSE pass --------------------*- C++ -*-===// 0002 // 0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 0004 // See https://llvm.org/LICENSE.txt for license information. 0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 0006 // 0007 //===----------------------------------------------------------------------===// 0008 // 0009 /// \file 0010 /// This file provides the interface for a simple, fast CSE pass. 0011 // 0012 //===----------------------------------------------------------------------===// 0013 0014 #ifndef LLVM_TRANSFORMS_SCALAR_EARLYCSE_H 0015 #define LLVM_TRANSFORMS_SCALAR_EARLYCSE_H 0016 0017 #include "llvm/IR/PassManager.h" 0018 0019 namespace llvm { 0020 0021 class Function; 0022 0023 /// A simple and fast domtree-based CSE pass. 0024 /// 0025 /// This pass does a simple depth-first walk over the dominator tree, 0026 /// eliminating trivially redundant instructions and using instsimplify to 0027 /// canonicalize things as it goes. It is intended to be fast and catch obvious 0028 /// cases so that instcombine and other passes are more effective. It is 0029 /// expected that a later pass of GVN will catch the interesting/hard cases. 0030 struct EarlyCSEPass : PassInfoMixin<EarlyCSEPass> { 0031 EarlyCSEPass(bool UseMemorySSA = false) : UseMemorySSA(UseMemorySSA) {} 0032 0033 /// Run the pass over the function. 0034 PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM); 0035 void printPipeline(raw_ostream &OS, 0036 function_ref<StringRef(StringRef)> MapClassName2PassName); 0037 0038 bool UseMemorySSA; 0039 }; 0040 0041 } // end namespace llvm 0042 0043 #endif // LLVM_TRANSFORMS_SCALAR_EARLYCSE_H
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