include/llvm/Transforms/Scalar/LoopSimplifyCFG.h

   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/LoopInfo.h"
  20 #include "llvm/IR/PassManager.h"
  21 #include "llvm/Transforms/Scalar/LoopPassManager.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, LoopAnalysisManager &AM,
  29                         LoopStandardAnalysisResults &AR, LPMUpdater &U);
  30 };
  31 } // end namespace llvm
  32
  33 #endif // LLVM_TRANSFORMS_SCALAR_LOOPSIMPLIFYCFG_H