1 | //===- LoopSimplifyCFG.cpp - Loop CFG Simplification 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 | // This file implements the Loop SimplifyCFG Pass. This pass is responsible for |
10 | // basic loop CFG cleanup, primarily to assist other loop passes. If you |
11 | // encounter a noncanonical CFG construct that causes another loop pass to |
12 | // perform suboptimally, this is the place to fix it up. |
13 | // |
14 | //===----------------------------------------------------------------------===// |
15 | |
16 | #ifndef LLVM_TRANSFORMS_SCALAR_LOOPSIMPLIFYCFG_H |
17 | #define LLVM_TRANSFORMS_SCALAR_LOOPSIMPLIFYCFG_H |
18 | |
19 | #include "llvm/Analysis/LoopAnalysisManager.h" |
20 | #include "llvm/IR/PassManager.h" |
21 | |
22 | namespace llvm { |
23 | |
24 | class LPMUpdater; |
25 | class Loop; |
26 | |
27 | /// Performs basic CFG simplifications to assist other loop passes. |
28 | class LoopSimplifyCFGPass : public PassInfoMixin<LoopSimplifyCFGPass> { |
29 | public: |
30 | PreservedAnalyses run(Loop &L, LoopAnalysisManager &AM, |
31 | LoopStandardAnalysisResults &AR, LPMUpdater &U); |
32 | }; |
33 | } // end namespace llvm |
34 | |
35 | #endif // LLVM_TRANSFORMS_SCALAR_LOOPSIMPLIFYCFG_H |
36 | |