include/llvm/Transforms/Scalar/LoopStrengthReduce.h

   1 //===- LoopStrengthReduce.h - Loop Strength Reduce 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 transformation analyzes and transforms the induction variables (and
  10 // computations derived from them) into forms suitable for efficient execution
  11 // on the target.
  12 //
  13 // This pass performs a strength reduction on array references inside loops that
  14 // have as one or more of their components the loop induction variable, it
  15 // rewrites expressions to take advantage of scaled-index addressing modes
  16 // available on the target, and it performs a variety of other optimizations
  17 // related to loop induction variables.
  18 //
  19 //===----------------------------------------------------------------------===//
  20
  21 #ifndef LLVM_TRANSFORMS_SCALAR_LOOPSTRENGTHREDUCE_H
  22 #define LLVM_TRANSFORMS_SCALAR_LOOPSTRENGTHREDUCE_H
  23
  24 #include "llvm/Analysis/LoopAnalysisManager.h"
  25 #include "llvm/IR/PassManager.h"
  26
  27 namespace llvm {
  28
  29 class Loop;
  30 class LPMUpdater;
  31
  32 /// Performs Loop Strength Reduce Pass.
  33 class LoopStrengthReducePass : public PassInfoMixin<LoopStrengthReducePass> {
  34 public:
  35   PreservedAnalyses run(Loop &L, LoopAnalysisManager &AM,
  36                         LoopStandardAnalysisResults &AR, LPMUpdater &U);
  37 };
  38
  39 } // end namespace llvm
  40
  41 #endif // LLVM_TRANSFORMS_SCALAR_LOOPSTRENGTHREDUCE_H