1 //===- llvm/Transforms/Utils/UnrollLoop.h - Unrolling utilities -*- 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 file defines some loop unrolling utilities. It does not define any 11 // actual pass or policy, but provides a single function to perform loop 12 // unrolling. 13 // 14 //===----------------------------------------------------------------------===// 15 16 #ifndef LLVM_TRANSFORMS_UTILS_UNROLLLOOP_H 17 #define LLVM_TRANSFORMS_UTILS_UNROLLLOOP_H 18 19 // Needed because we can't forward-declare the nested struct 20 // TargetTransformInfo::UnrollingPreferences 21 #include "llvm/Analysis/TargetTransformInfo.h" 22 23 namespace llvm { 24 25 class StringRef; 26 class AssumptionCache; 27 class DominatorTree; 28 class Loop; 29 class LoopInfo; 30 class LPPassManager; 31 class MDNode; 32 class Pass; 33 class OptimizationRemarkEmitter; 34 class ScalarEvolution; 35 36 typedef SmallDenseMap<const Loop *, Loop *, 4> NewLoopsMap; 37 38 const Loop* addClonedBlockToLoopInfo(BasicBlock *OriginalBB, 39 BasicBlock *ClonedBB, LoopInfo *LI, 40 NewLoopsMap &NewLoops); 41 42 bool UnrollLoop(Loop *L, unsigned Count, unsigned TripCount, bool Force, 43 bool AllowRuntime, bool AllowExpensiveTripCount, 44 bool PreserveCondBr, bool PreserveOnlyFirst, 45 unsigned TripMultiple, unsigned PeelCount, LoopInfo *LI, 46 ScalarEvolution *SE, DominatorTree *DT, AssumptionCache *AC, 47 OptimizationRemarkEmitter *ORE, bool PreserveLCSSA); 48 49 bool UnrollRuntimeLoopRemainder(Loop *L, unsigned Count, 50 bool AllowExpensiveTripCount, 51 bool UseEpilogRemainder, LoopInfo *LI, 52 ScalarEvolution *SE, DominatorTree *DT, 53 bool PreserveLCSSA); 54 55 void computePeelCount(Loop *L, unsigned LoopSize, 56 TargetTransformInfo::UnrollingPreferences &UP, 57 unsigned &TripCount); 58 59 bool peelLoop(Loop *L, unsigned PeelCount, LoopInfo *LI, ScalarEvolution *SE, 60 DominatorTree *DT, AssumptionCache *AC, bool PreserveLCSSA); 61 62 MDNode *GetUnrollMetadata(MDNode *LoopID, StringRef Name); 63 } 64 65 #endif 66
