C++ (Cpp) Scop::getSE Examples

Example #1

File: IRBuilder.cpp Project: jeremyhu/polly

void ScopAnnotator::buildAliasScopes(Scop &S) {
  SE = S.getSE();

  LLVMContext &Ctx = SE->getContext();
  AliasScopeDomain = getID(Ctx, MDString::get(Ctx, "polly.alias.scope.domain"));

  AliasScopeMap.clear();
  OtherAliasScopeListMap.clear();

  SetVector<Value *> BasePtrs;
  for (ScopStmt &Stmt : S)
    for (MemoryAccess *MA : Stmt)
      BasePtrs.insert(MA->getBaseAddr());

  std::string AliasScopeStr = "polly.alias.scope.";
  for (Value *BasePtr : BasePtrs)
    AliasScopeMap[BasePtr] = getID(
        Ctx, AliasScopeDomain,
        MDString::get(Ctx, (AliasScopeStr + BasePtr->getName()).str().c_str()));

  for (Value *BasePtr : BasePtrs) {
    MDNode *AliasScopeList = MDNode::get(Ctx, {});
    for (const auto &AliasScopePair : AliasScopeMap) {
      if (BasePtr == AliasScopePair.first)
        continue;

      Metadata *Args = {AliasScopePair.second};
      AliasScopeList =
          MDNode::concatenate(AliasScopeList, MDNode::get(Ctx, Args));
    }

    OtherAliasScopeListMap[BasePtr] = AliasScopeList;
  }
}

Example #2

File: ScopInfo.cpp Project: SameerAsal/Polly

__isl_give isl_pw_aff *SCEVAffinator::getPwAff(ScopStmt *Stmt,
                                               const SCEV *Scev) {
  Scop *S = Stmt->getParent();
  const Region *Reg = &S->getRegion();

  S->addParams(getParamsInAffineExpr(Reg, Scev, *S->getSE()));

  SCEVAffinator Affinator(Stmt);
  return Affinator.visit(Scev);
}

Example #3

File: ScopInfo.cpp Project: SameerAsal/Polly

__isl_give isl_pw_aff *
SCEVAffinator::visitAddRecExpr(const SCEVAddRecExpr *Expr) {
  assert(Expr->isAffine() && "Only affine AddRecurrences allowed");

  // Directly generate isl_pw_aff for Expr if 'start' is zero.
  if (Expr->getStart()->isZero()) {
    assert(S->getRegion().contains(Expr->getLoop()) &&
           "Scop does not contain the loop referenced in this AddRec");

    isl_pw_aff *Start = visit(Expr->getStart());
    isl_pw_aff *Step = visit(Expr->getOperand(1));
    isl_space *Space = isl_space_set_alloc(Ctx, 0, NbLoopSpaces);
    isl_local_space *LocalSpace = isl_local_space_from_space(Space);

    int loopDimension = getLoopDepth(Expr->getLoop());

    isl_aff *LAff = isl_aff_set_coefficient_si(
        isl_aff_zero_on_domain(LocalSpace), isl_dim_in, loopDimension, 1);
    isl_pw_aff *LPwAff = isl_pw_aff_from_aff(LAff);

    // TODO: Do we need to check for NSW and NUW?
    return isl_pw_aff_add(Start, isl_pw_aff_mul(Step, LPwAff));
  }

  // Translate AddRecExpr from '{start, +, inc}' into 'start + {0, +, inc}'
  // if 'start' is not zero.
  ScalarEvolution &SE = *S->getSE();
  const SCEV *ZeroStartExpr = SE.getAddRecExpr(
      SE.getConstant(Expr->getStart()->getType(), 0),
      Expr->getStepRecurrence(SE), Expr->getLoop(), SCEV::FlagAnyWrap);

  isl_pw_aff *ZeroStartResult = visit(ZeroStartExpr);
  isl_pw_aff *Start = visit(Expr->getStart());

  return isl_pw_aff_add(ZeroStartResult, Start);
}