contrib/llvm/include/llvm/Transforms/Scalar/AlignmentFromAssumptions.h

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