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