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//===- llvm/Transforms/Utils/UnrollLoop.h - Unrolling utilities -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines some loop unrolling utilities. It does not define any
// actual pass or policy, but provides a single function to perform loop
// unrolling.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TRANSFORMS_UTILS_UNROLLLOOP_H
#define LLVM_TRANSFORMS_UTILS_UNROLLLOOP_H
// Needed because we can't forward-declare the nested struct
// TargetTransformInfo::UnrollingPreferences
#include "llvm/Analysis/TargetTransformInfo.h"
namespace llvm {
class StringRef;
class AssumptionCache;
class DominatorTree;
class Loop;
class LoopInfo;
class LPPassManager;
class MDNode;
class Pass;
class OptimizationRemarkEmitter;
class ScalarEvolution;
typedef SmallDenseMap<const Loop *, Loop *, 4> NewLoopsMap;
const Loop* addClonedBlockToLoopInfo(BasicBlock *OriginalBB,
BasicBlock *ClonedBB, LoopInfo *LI,
NewLoopsMap &NewLoops);
bool UnrollLoop(Loop *L, unsigned Count, unsigned TripCount, bool Force,
bool AllowRuntime, bool AllowExpensiveTripCount,
bool PreserveCondBr, bool PreserveOnlyFirst,
unsigned TripMultiple, unsigned PeelCount, LoopInfo *LI,
ScalarEvolution *SE, DominatorTree *DT, AssumptionCache *AC,
OptimizationRemarkEmitter *ORE, bool PreserveLCSSA);
bool UnrollRuntimeLoopRemainder(Loop *L, unsigned Count,
bool AllowExpensiveTripCount,
bool UseEpilogRemainder, LoopInfo *LI,
ScalarEvolution *SE, DominatorTree *DT,
bool PreserveLCSSA);
void computePeelCount(Loop *L, unsigned LoopSize,
TargetTransformInfo::UnrollingPreferences &UP);
bool peelLoop(Loop *L, unsigned PeelCount, LoopInfo *LI, ScalarEvolution *SE,
DominatorTree *DT, bool PreserveLCSSA);
MDNode *GetUnrollMetadata(MDNode *LoopID, StringRef Name);
}
#endif
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