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//===- LoopStrengthReduce.h - Loop Strength Reduce Pass ---------*- 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

//

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

//

// This transformation analyzes and transforms the induction variables (and

// computations derived from them) into forms suitable for efficient execution

// on the target.

//

// This pass performs a strength reduction on array references inside loops that

// have as one or more of their components the loop induction variable, it

// rewrites expressions to take advantage of scaled-index addressing modes

// available on the target, and it performs a variety of other optimizations

// related to loop induction variables.

//

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

#ifndef LLVM_TRANSFORMS_SCALAR_LOOPSTRENGTHREDUCE_H

#define LLVM_TRANSFORMS_SCALAR_LOOPSTRENGTHREDUCE_H

#include "llvm/Analysis/LoopAnalysisManager.h"

#include "llvm/IR/PassManager.h"

namespace llvm {

class Loop;

class LPMUpdater;

/// Performs Loop Strength Reduce Pass.

class LoopStrengthReducePass : public PassInfoMixin<LoopStrengthReducePass> {

public:

  PreservedAnalyses run(Loop &L, LoopAnalysisManager &AM,

                        LoopStandardAnalysisResults &AR, LPMUpdater &U);

};

} // end namespace llvm

#endif // LLVM_TRANSFORMS_SCALAR_LOOPSTRENGTHREDUCE_H