1 //===- LoopSimplifyCFG.cpp - Loop CFG Simplification Pass -------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the Loop SimplifyCFG Pass. This pass is responsible for
11 // basic loop CFG cleanup, primarily to assist other loop passes. If you
12 // encounter a noncanonical CFG construct that causes another loop pass to
13 // perform suboptimally, this is the place to fix it up.
14 //
15 //===----------------------------------------------------------------------===//
16 
17 #ifndef LLVM_TRANSFORMS_SCALAR_LOOPSIMPLIFYCFG_H
18 #define LLVM_TRANSFORMS_SCALAR_LOOPSIMPLIFYCFG_H
19 
20 #include "llvm/Analysis/LoopInfo.h"
21 #include "llvm/IR/PassManager.h"
22 
23 namespace llvm {
24 
25 /// Performs basic CFG simplifications to assist other loop passes.
26 class LoopSimplifyCFGPass : public PassInfoMixin<LoopSimplifyCFGPass> {
27 public:
28   PreservedAnalyses run(Loop &L, AnalysisManager<Loop> &AM);
29 };
30 } // end namespace llvm
31 
32 #endif // LLVM_TRANSFORMS_SCALAR_LOOPSIMPLIFYCFG_H
33