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1 //===---- AlignmentFromAssumptions.h ----------------------------*- C++ -*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8 //
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9 // This file implements a ScalarEvolution-based transformation to set
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10 // the alignments of load, stores and memory intrinsics based on the truth
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11 // expressions of assume intrinsics. The primary motivation is to handle
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12 // complex alignment assumptions that apply to vector loads and stores that
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13 // appear after vectorization and unrolling.
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14 //
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15 //===----------------------------------------------------------------------===//
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16
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17 #ifndef LLVM_TRANSFORMS_SCALAR_ALIGNMENTFROMASSUMPTIONS_H
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18 #define LLVM_TRANSFORMS_SCALAR_ALIGNMENTFROMASSUMPTIONS_H
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19
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20 #include "llvm/Analysis/ScalarEvolution.h"
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21 #include "llvm/IR/Function.h"
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22 #include "llvm/IR/IntrinsicInst.h"
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23 #include "llvm/IR/PassManager.h"
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24
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25 namespace llvm {
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26
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27 struct AlignmentFromAssumptionsPass
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28 : public PassInfoMixin<AlignmentFromAssumptionsPass> {
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29 PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
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30
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31 // Glue for old PM.
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32 bool runImpl(Function &F, AssumptionCache &AC, ScalarEvolution *SE_,
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33 DominatorTree *DT_);
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34
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35 ScalarEvolution *SE = nullptr;
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36 DominatorTree *DT = nullptr;
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37
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38 bool extractAlignmentInfo(CallInst *I, Value *&AAPtr, const SCEV *&AlignSCEV,
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39 const SCEV *&OffSCEV);
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40 bool processAssumption(CallInst *I);
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41 };
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42 }
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43
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44 #endif // LLVM_TRANSFORMS_SCALAR_ALIGNMENTFROMASSUMPTIONS_H
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