C++ (Cpp) TypeLowering::emitLoad Exemples

Exemple #1

Fichier : SILGenConvert.cpp Projet : mahzonghui/swift

ManagedValue SILGenFunction::emitUncheckedGetOptionalValueFrom(SILLocation loc,
                                                    ManagedValue addrOrValue,
                                                    const TypeLowering &optTL,
                                                    SGFContext C) {
  SILType origPayloadTy =
    addrOrValue.getType().getAnyOptionalObjectType();

  auto someDecl = getASTContext().getOptionalSomeDecl();
 
  ManagedValue payload;

  // Take the payload from the optional.  Cheat a bit in the +0
  // case--UncheckedTakeEnumData will never actually invalidate an Optional enum
  // value.
  SILValue payloadVal;
  if (!addrOrValue.getType().isAddress()) {
    payloadVal = B.createUncheckedEnumData(loc, addrOrValue.forward(*this),
                                           someDecl);
  } else {
    payloadVal =
      B.createUncheckedTakeEnumDataAddr(loc, addrOrValue.forward(*this),
                                        someDecl, origPayloadTy);
  
    if (optTL.isLoadable())
      payloadVal =
          optTL.emitLoad(B, loc, payloadVal, LoadOwnershipQualifier::Take);
  }

  // Produce a correctly managed value.
  if (addrOrValue.hasCleanup())
    payload = emitManagedRValueWithCleanup(payloadVal);
  else
    payload = ManagedValue::forUnmanaged(payloadVal);
  
  return payload;
}