/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/include/llvm/Transforms/Scalar/EarlyCSE.h
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1 | | //===- EarlyCSE.h - Simple and fast CSE pass --------------------*- 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 | | /// \file |
10 | | /// This file provides the interface for a simple, fast CSE pass. |
11 | | // |
12 | | //===----------------------------------------------------------------------===// |
13 | | |
14 | | #ifndef LLVM_TRANSFORMS_SCALAR_EARLYCSE_H |
15 | | #define LLVM_TRANSFORMS_SCALAR_EARLYCSE_H |
16 | | |
17 | | #include "llvm/IR/PassManager.h" |
18 | | |
19 | | namespace llvm { |
20 | | |
21 | | class Function; |
22 | | |
23 | | /// A simple and fast domtree-based CSE pass. |
24 | | /// |
25 | | /// This pass does a simple depth-first walk over the dominator tree, |
26 | | /// eliminating trivially redundant instructions and using instsimplify to |
27 | | /// canonicalize things as it goes. It is intended to be fast and catch obvious |
28 | | /// cases so that instcombine and other passes are more effective. It is |
29 | | /// expected that a later pass of GVN will catch the interesting/hard cases. |
30 | | struct EarlyCSEPass : PassInfoMixin<EarlyCSEPass> { |
31 | 349 | EarlyCSEPass(bool UseMemorySSA = false) : UseMemorySSA(UseMemorySSA) {} |
32 | | |
33 | | /// Run the pass over the function. |
34 | | PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM); |
35 | | |
36 | | bool UseMemorySSA; |
37 | | }; |
38 | | |
39 | | } // end namespace llvm |
40 | | |
41 | | #endif // LLVM_TRANSFORMS_SCALAR_EARLYCSE_H |