Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===------- LoopBoundSplit.h - Split Loop Bound ----------------*- C++ -*-===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_TRANSFORMS_SCALAR_LOOPBOUNDSPLIT_H

#define LLVM_TRANSFORMS_SCALAR_LOOPBOUNDSPLIT_H

#include "llvm/Analysis/LoopAnalysisManager.h"

#include "llvm/IR/PassManager.h"

namespace llvm {

class LPMUpdater;

class Loop;

/// This pass transforms loops that contain a conditional branch with induction

/// variable. For example, it transforms left code to right code:

///

///                              newbound = min(n, c)

///  while (iv < n) {            while(iv < newbound) {

///    A                           A

///    if (iv < c)                 B

///      B                         C

///    C                         }

///                              if (iv != n) {

///                                while (iv < n) {

///                                  A

///                                  C

///                                }

///                              }

class LoopBoundSplitPass : public PassInfoMixin<LoopBoundSplitPass> {

public:

  PreservedAnalyses run(Loop &L, LoopAnalysisManager &AM,

                        LoopStandardAnalysisResults &AR, LPMUpdater &U);

};

} // end namespace llvm

#endif // LLVM_TRANSFORMS_SCALAR_LOOPBOUNDSPLIT_H