1//===- llvm/Transforms/Utils/LoopPeel.h ----- Peeling utilities -*- 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 file defines some loop peeling utilities. It does not define any
10// actual pass or policy.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_TRANSFORMS_UTILS_LOOPPEEL_H
15#define LLVM_TRANSFORMS_UTILS_LOOPPEEL_H
16
17#include "llvm/Analysis/TargetTransformInfo.h"
18#include "llvm/Transforms/Utils/ValueMapper.h"
19
20namespace llvm {
21
22bool canPeel(const Loop *L);
23
24/// VMap is the value-map that maps instructions from the original loop to
25/// instructions in the last peeled-off iteration.
26bool peelLoop(Loop *L, unsigned PeelCount, LoopInfo *LI, ScalarEvolution *SE,
27 DominatorTree &DT, AssumptionCache *AC, bool PreserveLCSSA,
28 ValueToValueMapTy &VMap);
29
30TargetTransformInfo::PeelingPreferences
31gatherPeelingPreferences(Loop *L, ScalarEvolution &SE,
32 const TargetTransformInfo &TTI,
33 std::optional<bool> UserAllowPeeling,
34 std::optional<bool> UserAllowProfileBasedPeeling,
35 bool UnrollingSpecficValues = false);
36
37void computePeelCount(Loop *L, unsigned LoopSize,
38 TargetTransformInfo::PeelingPreferences &PP,
39 unsigned TripCount, DominatorTree &DT,
40 ScalarEvolution &SE, AssumptionCache *AC = nullptr,
41 unsigned Threshold = UINT_MAX);
42
43} // end namespace llvm
44
45#endif // LLVM_TRANSFORMS_UTILS_LOOPPEEL_H
46

source code of llvm/include/llvm/Transforms/Utils/LoopPeel.h