C++ ApplyInst::getLoc方法代码示例

  /// Hoists the necessary check for beginning and end of the induction
  /// encapsulated by this access function to the header.
  void hoistCheckToPreheader(ArraySemanticsCall CheckToHoist,
                             SILBasicBlock *Preheader,
                             DominanceInfo *DT) {
    ApplyInst *AI = CheckToHoist;
    SILLocation Loc = AI->getLoc();
    SILBuilderWithScope Builder(Preheader->getTerminator(), AI);

    // Get the first induction value.
    auto FirstVal = Ind->getFirstValue();
    // Clone the struct for the start index.
    auto Start = cast<SILInstruction>(CheckToHoist.getIndex())
                     ->clone(Preheader->getTerminator());
    // Set the new start index to the first value of the induction.
    Start->setOperand(0, FirstVal);

      // Clone and fixup the load, retain sequence to the header.
    auto NewCheck = CheckToHoist.copyTo(Preheader->getTerminator(), DT);
    NewCheck->setOperand(1, Start);

    // Get the last induction value.
    auto LastVal = Ind->getLastValue(Loc, Builder);
    // Clone the struct for the end index.
    auto End = cast<SILInstruction>(CheckToHoist.getIndex())
                   ->clone(Preheader->getTerminator());
    // Set the new end index to the last value of the induction.
    End->setOperand(0, LastVal);

    NewCheck = CheckToHoist.copyTo(Preheader->getTerminator(), DT);
    NewCheck->setOperand(1, End);
  }

/// Try to CSE the users of \p From to the users of \p To.
/// The original users of \p To are passed in ToApplyWitnessUsers.
/// Returns true on success.
static bool tryToCSEOpenExtCall(OpenExistentialAddrInst *From,
                                OpenExistentialAddrInst *To,
                                ApplyWitnessPair ToApplyWitnessUsers,
                                DominanceInfo *DA) {
  assert(From != To && "Can't replace instruction with itself");

  ApplyInst *FromAI = nullptr;
  ApplyInst *ToAI = nullptr;
  WitnessMethodInst *FromWMI = nullptr;
  WitnessMethodInst *ToWMI = nullptr;
  std::tie(FromAI, FromWMI) = getOpenExistentialUsers(From);
  std::tie(ToAI, ToWMI) = ToApplyWitnessUsers;

  // Make sure that the OEA instruction has exactly two expected users.
  if (!FromAI || !ToAI || !FromWMI || !ToWMI)
    return false;

  // Make sure we are calling the same method.
  if (FromWMI->getMember() != ToWMI->getMember())
    return false;

  // We are going to reuse the TO-WMI, so make sure it dominates the call site.
  if (!DA->properlyDominates(ToWMI, FromWMI))
    return false;

  SILBuilder Builder(FromAI);
  // Make archetypes used by the ToAI available to the builder.
  SILOpenedArchetypesTracker OpenedArchetypesTracker(*FromAI->getFunction());
  OpenedArchetypesTracker.registerUsedOpenedArchetypes(ToAI);
  Builder.setOpenedArchetypesTracker(&OpenedArchetypesTracker);

  assert(FromAI->getArguments().size() == ToAI->getArguments().size() &&
         "Invalid number of arguments");

  // Don't handle any apply instructions that involve substitutions.
  if (ToAI->getSubstitutions().size() != 1) return false;

  // Prepare the Apply args.
  SmallVector<SILValue, 8> Args;
  for (auto Op : FromAI->getArguments()) {
      Args.push_back(Op == From ? To : Op);
  }

  auto FnTy = ToAI->getSubstCalleeSILType();
  auto ResTy = FnTy.castTo<SILFunctionType>()->getSILResult();

  ApplyInst *NAI = Builder.createApply(ToAI->getLoc(), ToWMI, FnTy, ResTy,
                                       ToAI->getSubstitutions(), Args,
                                       ToAI->isNonThrowing());
  FromAI->replaceAllUsesWith(NAI);
  FromAI->eraseFromParent();
  NumOpenExtRemoved++;
  return true;
}