1 //===- LoopStrengthReduce.h - Loop Strength Reduce Pass ---------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This transformation analyzes and transforms the induction variables (and 11 // computations derived from them) into forms suitable for efficient execution 12 // on the target. 13 // 14 // This pass performs a strength reduction on array references inside loops that 15 // have as one or more of their components the loop induction variable, it 16 // rewrites expressions to take advantage of scaled-index addressing modes 17 // available on the target, and it performs a variety of other optimizations 18 // related to loop induction variables. 19 // 20 //===----------------------------------------------------------------------===// 21 22 #ifndef LLVM_TRANSFORMS_SCALAR_LOOPSTRENGTHREDUCE_H 23 #define LLVM_TRANSFORMS_SCALAR_LOOPSTRENGTHREDUCE_H 24 25 #include "llvm/Analysis/LoopAnalysisManager.h" 26 #include "llvm/IR/PassManager.h" 27 28 namespace llvm { 29 30 class Loop; 31 class LPMUpdater; 32 33 /// Performs Loop Strength Reduce Pass. 34 class LoopStrengthReducePass : public PassInfoMixin<LoopStrengthReducePass> { 35 public: 36 PreservedAnalyses run(Loop &L, LoopAnalysisManager &AM, 37 LoopStandardAnalysisResults &AR, LPMUpdater &U); 38 }; 39 40 } // end namespace llvm 41 42 #endif // LLVM_TRANSFORMS_SCALAR_LOOPSTRENGTHREDUCE_H 43
