Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===- llvm/Transforms/Utils/LoopPeel.h ----- Peeling utilities -*- 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 file defines some loop peeling utilities. It does not define any

// actual pass or policy.

//

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

#ifndef LLVM_TRANSFORMS_UTILS_LOOPPEEL_H

#define LLVM_TRANSFORMS_UTILS_LOOPPEEL_H

#include "llvm/Analysis/TargetTransformInfo.h"

#include "llvm/Transforms/Utils/ValueMapper.h"

namespace llvm {

bool canPeel(const Loop *L);

/// VMap is the value-map that maps instructions from the original loop to

/// instructions in the last peeled-off iteration.

bool peelLoop(Loop *L, unsigned PeelCount, LoopInfo *LI, ScalarEvolution *SE,

              DominatorTree &DT, AssumptionCache *AC, bool PreserveLCSSA,

              ValueToValueMapTy &VMap);

TargetTransformInfo::PeelingPreferences

gatherPeelingPreferences(Loop *L, ScalarEvolution &SE,

                         const TargetTransformInfo &TTI,

                         std::optional<bool> UserAllowPeeling,

                         std::optional<bool> UserAllowProfileBasedPeeling,

                         bool UnrollingSpecficValues = false);

void computePeelCount(Loop *L, unsigned LoopSize,

                      TargetTransformInfo::PeelingPreferences &PP,

                      unsigned TripCount, DominatorTree &DT,

                      ScalarEvolution &SE, AssumptionCache *AC = nullptr,

                      unsigned Threshold = UINT_MAX);

} // end namespace llvm

#endif // LLVM_TRANSFORMS_UTILS_LOOPPEEL_H