include/llvm/Transforms/Scalar/AlignmentFromAssumptions.h

   1 //===---- AlignmentFromAssumptions.h ----------------------------*- 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 implements a ScalarEvolution-based transformation to set
  10 // the alignments of load, stores and memory intrinsics based on the truth
  11 // expressions of assume intrinsics. The primary motivation is to handle
  12 // complex alignment assumptions that apply to vector loads and stores that
  13 // appear after vectorization and unrolling.
  14 //
  15 //===----------------------------------------------------------------------===//
  16
  17 #ifndef LLVM_TRANSFORMS_SCALAR_ALIGNMENTFROMASSUMPTIONS_H
  18 #define LLVM_TRANSFORMS_SCALAR_ALIGNMENTFROMASSUMPTIONS_H
  19
  20 #include "llvm/Analysis/ScalarEvolution.h"
  21 #include "llvm/IR/Function.h"
  22 #include "llvm/IR/IntrinsicInst.h"
  23 #include "llvm/IR/PassManager.h"
  24
  25 namespace llvm {
  26
  27 struct AlignmentFromAssumptionsPass
  28     : public PassInfoMixin<AlignmentFromAssumptionsPass> {
  29   PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
  30
  31   // Glue for old PM.
  32   bool runImpl(Function &F, AssumptionCache &AC, ScalarEvolution *SE_,
  33                DominatorTree *DT_);
  34
  35   ScalarEvolution *SE = nullptr;
  36   DominatorTree *DT = nullptr;
  37
  38   bool extractAlignmentInfo(CallInst *I, Value *&AAPtr, const SCEV *&AlignSCEV,
  39                             const SCEV *&OffSCEV);
  40   bool processAssumption(CallInst *I);
  41 };
  42 }
  43
  44 #endif // LLVM_TRANSFORMS_SCALAR_ALIGNMENTFROMASSUMPTIONS_H