Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===---- AlignmentFromAssumptions.h ----------------------------*- 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 implements a ScalarEvolution-based transformation to set

// the alignments of load, stores and memory intrinsics based on the truth

// expressions of assume intrinsics. The primary motivation is to handle

// complex alignment assumptions that apply to vector loads and stores that

// appear after vectorization and unrolling.

//

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

#ifndef LLVM_TRANSFORMS_SCALAR_ALIGNMENTFROMASSUMPTIONS_H

#define LLVM_TRANSFORMS_SCALAR_ALIGNMENTFROMASSUMPTIONS_H

#include "llvm/IR/PassManager.h"

namespace llvm {

class AssumptionCache;

class DominatorTree;

class ScalarEvolution;

class SCEV;

struct AlignmentFromAssumptionsPass

    : public PassInfoMixin<AlignmentFromAssumptionsPass> {

  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);

  // Glue for old PM.

  bool runImpl(Function &F, AssumptionCache &AC, ScalarEvolution *SE_,

               DominatorTree *DT_);

  ScalarEvolution *SE = nullptr;

  DominatorTree *DT = nullptr;

  bool extractAlignmentInfo(CallInst *I, unsigned Idx, Value *&AAPtr,

                            const SCEV *&AlignSCEV, const SCEV *&OffSCEV);

  bool processAssumption(CallInst *I, unsigned Idx);

};

}

#endif // LLVM_TRANSFORMS_SCALAR_ALIGNMENTFROMASSUMPTIONS_H