Esempio n. 1
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DefinedOrUnknownSVal
SValBuilder::getConjuredHeapSymbolVal(const Expr *E,
                                      const LocationContext *LCtx,
                                      unsigned VisitCount) {
  QualType T = E->getType();
  assert(Loc::isLocType(T));
  assert(SymbolManager::canSymbolicate(T));
  if (T->isNullPtrType())
    return makeZeroVal(T);

  SymbolRef sym = SymMgr.conjureSymbol(E, LCtx, T, VisitCount);
  return loc::MemRegionVal(MemMgr.getSymbolicHeapRegion(sym));
}
Esempio n. 2
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DefinedOrUnknownSVal SValBuilder::conjureSymbolVal(const Stmt *stmt,
                                                   const LocationContext *LCtx,
                                                   QualType type,
                                                   unsigned visitCount) {
  if (type->isNullPtrType())
    return makeZeroVal(type);

  if (!SymbolManager::canSymbolicate(type))
    return UnknownVal();

  SymbolRef sym = SymMgr.conjureSymbol(stmt, LCtx, type, visitCount);

  if (Loc::isLocType(type))
    return loc::MemRegionVal(MemMgr.getSymbolicRegion(sym));

  return nonloc::SymbolVal(sym);
}
Esempio n. 3
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DefinedOrUnknownSVal SValBuilder::conjureSymbolVal(const void *SymbolTag,
                                                   const Expr *Ex,
                                                   const LocationContext *LCtx,
                                                   unsigned Count) {
  QualType T = Ex->getType();

  if (T->isNullPtrType())
    return makeZeroVal(T);

  // Compute the type of the result. If the expression is not an R-value, the
  // result should be a location.
  QualType ExType = Ex->getType();
  if (Ex->isGLValue())
    T = LCtx->getAnalysisDeclContext()->getASTContext().getPointerType(ExType);

  return conjureSymbolVal(SymbolTag, Ex, LCtx, T, Count);
}
Esempio n. 4
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DefinedOrUnknownSVal
SValBuilder::getRegionValueSymbolVal(const TypedValueRegion *region) {
  QualType T = region->getValueType();

  if (T->isNullPtrType())
    return makeZeroVal(T);

  if (!SymbolManager::canSymbolicate(T))
    return UnknownVal();

  SymbolRef sym = SymMgr.getRegionValueSymbol(region);

  if (Loc::isLocType(T))
    return loc::MemRegionVal(MemMgr.getSymbolicRegion(sym));

  return nonloc::SymbolVal(sym);
}
Esempio n. 5
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clang::analyze_format_string::ArgType::MatchKind
ArgType::matchesType(ASTContext &C, QualType argTy) const {
  if (Ptr) {
    // It has to be a pointer.
    const PointerType *PT = argTy->getAs<PointerType>();
    if (!PT)
      return NoMatch;

    // We cannot write through a const qualified pointer.
    if (PT->getPointeeType().isConstQualified())
      return NoMatch;

    argTy = PT->getPointeeType();
  }

  switch (K) {
    case InvalidTy:
      llvm_unreachable("ArgType must be valid");

    case UnknownTy:
      return Match;

    case AnyCharTy: {
      if (const EnumType *ETy = argTy->getAs<EnumType>())
        argTy = ETy->getDecl()->getIntegerType();

      if (const BuiltinType *BT = argTy->getAs<BuiltinType>())
        switch (BT->getKind()) {
          default:
            break;
          case BuiltinType::Char_S:
          case BuiltinType::SChar:
          case BuiltinType::UChar:
          case BuiltinType::Char_U:
            return Match;
        }
      return NoMatch;
    }

    case SpecificTy: {
      if (const EnumType *ETy = argTy->getAs<EnumType>())
        argTy = ETy->getDecl()->getIntegerType();
      argTy = C.getCanonicalType(argTy).getUnqualifiedType();

      if (T == argTy)
        return Match;
      // Check for "compatible types".
      if (const BuiltinType *BT = argTy->getAs<BuiltinType>())
        switch (BT->getKind()) {
          default:
            break;
          case BuiltinType::Char_S:
          case BuiltinType::SChar:
          case BuiltinType::Char_U:
          case BuiltinType::UChar:
            return T == C.UnsignedCharTy || T == C.SignedCharTy ? Match
                                                                : NoMatch;
          case BuiltinType::Short:
            return T == C.UnsignedShortTy ? Match : NoMatch;
          case BuiltinType::UShort:
            return T == C.ShortTy ? Match : NoMatch;
          case BuiltinType::Int:
            return T == C.UnsignedIntTy ? Match : NoMatch;
          case BuiltinType::UInt:
            return T == C.IntTy ? Match : NoMatch;
          case BuiltinType::Long:
            return T == C.UnsignedLongTy ? Match : NoMatch;
          case BuiltinType::ULong:
            return T == C.LongTy ? Match : NoMatch;
          case BuiltinType::LongLong:
            return T == C.UnsignedLongLongTy ? Match : NoMatch;
          case BuiltinType::ULongLong:
            return T == C.LongLongTy ? Match : NoMatch;
        }
      return NoMatch;
    }

    case CStrTy: {
      const PointerType *PT = argTy->getAs<PointerType>();
      if (!PT)
        return NoMatch;
      QualType pointeeTy = PT->getPointeeType();
      if (const BuiltinType *BT = pointeeTy->getAs<BuiltinType>())
        switch (BT->getKind()) {
          case BuiltinType::Void:
          case BuiltinType::Char_U:
          case BuiltinType::UChar:
          case BuiltinType::Char_S:
          case BuiltinType::SChar:
            return Match;
          default:
            break;
        }

      return NoMatch;
    }

    case WCStrTy: {
      const PointerType *PT = argTy->getAs<PointerType>();
      if (!PT)
        return NoMatch;
      QualType pointeeTy =
        C.getCanonicalType(PT->getPointeeType()).getUnqualifiedType();
      return pointeeTy == C.getWideCharType() ? Match : NoMatch;
    }

    case WIntTy: {

      QualType PromoArg = 
        argTy->isPromotableIntegerType()
          ? C.getPromotedIntegerType(argTy) : argTy;

      QualType WInt = C.getCanonicalType(C.getWIntType()).getUnqualifiedType();
      PromoArg = C.getCanonicalType(PromoArg).getUnqualifiedType();

      // If the promoted argument is the corresponding signed type of the
      // wint_t type, then it should match.
      if (PromoArg->hasSignedIntegerRepresentation() &&
          C.getCorrespondingUnsignedType(PromoArg) == WInt)
        return Match;

      return WInt == PromoArg ? Match : NoMatch;
    }

    case CPointerTy:
      if (argTy->isVoidPointerType()) {
        return Match;
      } if (argTy->isPointerType() || argTy->isObjCObjectPointerType() ||
            argTy->isBlockPointerType() || argTy->isNullPtrType()) {
        return NoMatchPedantic;
      } else {
        return NoMatch;
      }

    case ObjCPointerTy: {
      if (argTy->getAs<ObjCObjectPointerType>() ||
          argTy->getAs<BlockPointerType>())
        return Match;

      // Handle implicit toll-free bridging.
      if (const PointerType *PT = argTy->getAs<PointerType>()) {
        // Things such as CFTypeRef are really just opaque pointers
        // to C structs representing CF types that can often be bridged
        // to Objective-C objects.  Since the compiler doesn't know which
        // structs can be toll-free bridged, we just accept them all.
        QualType pointee = PT->getPointeeType();
        if (pointee->getAsStructureType() || pointee->isVoidType())
          return Match;
      }
      return NoMatch;
    }
  }

  llvm_unreachable("Invalid ArgType Kind!");
}
Esempio n. 6
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bool ArgTypeResult::matchesType(ASTContext &C, QualType argTy) const {
  switch (K) {
    case InvalidTy:
      assert(false && "ArgTypeResult must be valid");
      return true;

    case UnknownTy:
      return true;

    case SpecificTy: {
      argTy = C.getCanonicalType(argTy).getUnqualifiedType();
      if (T == argTy)
        return true;
      // Check for "compatible types".
      if (const BuiltinType *BT = argTy->getAs<BuiltinType>())
        switch (BT->getKind()) {
          default:
            break;
          case BuiltinType::Char_S:
          case BuiltinType::SChar:
            return T == C.UnsignedCharTy;
          case BuiltinType::Char_U:
          case BuiltinType::UChar:                    
            return T == C.SignedCharTy;
          case BuiltinType::Short:
            return T == C.UnsignedShortTy;
          case BuiltinType::UShort:
            return T == C.ShortTy;
          case BuiltinType::Int:
            return T == C.UnsignedIntTy;
          case BuiltinType::UInt:
            return T == C.IntTy;
          case BuiltinType::Long:
            return T == C.UnsignedLongTy;
          case BuiltinType::ULong:
            return T == C.LongTy;
          case BuiltinType::LongLong:
            return T == C.UnsignedLongLongTy;
          case BuiltinType::ULongLong:
            return T == C.LongLongTy;
        }
      return false;
    }

    case CStrTy: {
      const PointerType *PT = argTy->getAs<PointerType>();
      if (!PT)
        return false;
      QualType pointeeTy = PT->getPointeeType();
      if (const BuiltinType *BT = pointeeTy->getAs<BuiltinType>())
        switch (BT->getKind()) {
          case BuiltinType::Void:
          case BuiltinType::Char_U:
          case BuiltinType::UChar:
          case BuiltinType::Char_S:
          case BuiltinType::SChar:
            return true;
          default:
            break;
        }

      return false;
    }

    case WCStrTy: {
      const PointerType *PT = argTy->getAs<PointerType>();
      if (!PT)
        return false;
      QualType pointeeTy =
        C.getCanonicalType(PT->getPointeeType()).getUnqualifiedType();
      return pointeeTy == C.getWCharType();
    }
    
    case WIntTy: {
      // Instead of doing a lookup for the definition of 'wint_t' (which
      // is defined by the system headers) instead see if wchar_t and
      // the argument type promote to the same type.
      QualType PromoWChar =
        C.getWCharType()->isPromotableIntegerType() 
          ? C.getPromotedIntegerType(C.getWCharType()) : C.getWCharType();
      QualType PromoArg = 
        argTy->isPromotableIntegerType()
          ? C.getPromotedIntegerType(argTy) : argTy;
      
      PromoWChar = C.getCanonicalType(PromoWChar).getUnqualifiedType();
      PromoArg = C.getCanonicalType(PromoArg).getUnqualifiedType();
      
      return PromoWChar == PromoArg;
    }

    case CPointerTy:
      return argTy->isPointerType() || argTy->isObjCObjectPointerType() ||
        argTy->isNullPtrType();

    case ObjCPointerTy:
      return argTy->getAs<ObjCObjectPointerType>() != NULL;
  }

  // FIXME: Should be unreachable, but Clang is currently emitting
  // a warning.
  return false;
}
Esempio n. 7
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/// CheckReinterpretCast - Check that a reinterpret_cast\<DestType\>(SrcExpr) is
/// valid.
/// Refer to C++ 5.2.10 for details. reinterpret_cast is typically used in code
/// like this:
/// char *bytes = reinterpret_cast\<char*\>(int_ptr);
void
CheckReinterpretCast(Sema &Self, Expr *&SrcExpr, QualType DestType,
                     const SourceRange &OpRange, const SourceRange &DestRange)
{
  QualType OrigDestType = DestType, OrigSrcType = SrcExpr->getType();

  DestType = Self.Context.getCanonicalType(DestType);
  QualType SrcType = SrcExpr->getType();
  if (const LValueReferenceType *DestTypeTmp =
        DestType->getAsLValueReferenceType()) {
    if (SrcExpr->isLvalue(Self.Context) != Expr::LV_Valid) {
      // Cannot cast non-lvalue to reference type.
      Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_rvalue)
        << "reinterpret_cast" << OrigDestType << SrcExpr->getSourceRange();
      return;
    }

    // C++ 5.2.10p10: [...] a reference cast reinterpret_cast<T&>(x) has the
    //   same effect as the conversion *reinterpret_cast<T*>(&x) with the
    //   built-in & and * operators.
    // This code does this transformation for the checked types.
    DestType = Self.Context.getPointerType(DestTypeTmp->getPointeeType());
    SrcType = Self.Context.getPointerType(SrcType);
  } else if (const RValueReferenceType *DestTypeTmp =
               DestType->getAsRValueReferenceType()) {
    // Both the reference conversion and the rvalue rules apply.
    Self.DefaultFunctionArrayConversion(SrcExpr);
    SrcType = SrcExpr->getType();

    DestType = Self.Context.getPointerType(DestTypeTmp->getPointeeType());
    SrcType = Self.Context.getPointerType(SrcType);
  } else {
    // C++ 5.2.10p1: [...] the lvalue-to-rvalue, array-to-pointer, and
    //   function-to-pointer standard conversions are performed on the
    //   expression v.
    Self.DefaultFunctionArrayConversion(SrcExpr);
    SrcType = SrcExpr->getType();
  }

  // Canonicalize source for comparison.
  SrcType = Self.Context.getCanonicalType(SrcType);

  const MemberPointerType *DestMemPtr = DestType->getAsMemberPointerType(),
                          *SrcMemPtr = SrcType->getAsMemberPointerType();
  if (DestMemPtr && SrcMemPtr) {
    // C++ 5.2.10p9: An rvalue of type "pointer to member of X of type T1"
    //   can be explicitly converted to an rvalue of type "pointer to member
    //   of Y of type T2" if T1 and T2 are both function types or both object
    //   types.
    if (DestMemPtr->getPointeeType()->isFunctionType() !=
        SrcMemPtr->getPointeeType()->isFunctionType()) {
      Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_generic)
        << "reinterpret_cast" << OrigDestType << OrigSrcType << OpRange;
      return;
    }

    // C++ 5.2.10p2: The reinterpret_cast operator shall not cast away
    //   constness.
    if (CastsAwayConstness(Self, SrcType, DestType)) {
      Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_const_away)
        << "reinterpret_cast" << OrigDestType << OrigSrcType << OpRange;
      return;
    }

    // A valid member pointer cast.
    return;
  }

  // See below for the enumeral issue.
  if (SrcType->isNullPtrType() && DestType->isIntegralType() &&
      !DestType->isEnumeralType()) {
    // C++0x 5.2.10p4: A pointer can be explicitly converted to any integral
    //   type large enough to hold it. A value of std::nullptr_t can be
    //   converted to an integral type; the conversion has the same meaning
    //   and validity as a conversion of (void*)0 to the integral type.
    if (Self.Context.getTypeSize(SrcType) >
        Self.Context.getTypeSize(DestType)) {
      Self.Diag(OpRange.getBegin(), diag::err_bad_reinterpret_cast_small_int)
        << OrigDestType << DestRange;
    }
    return;
  }

  bool destIsPtr = DestType->isPointerType();
  bool srcIsPtr = SrcType->isPointerType();
  if (!destIsPtr && !srcIsPtr) {
    // Except for std::nullptr_t->integer and lvalue->reference, which are
    // handled above, at least one of the two arguments must be a pointer.
    Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_generic)
      << "reinterpret_cast" << OrigDestType << OrigSrcType << OpRange;
    return;
  }

  if (SrcType == DestType) {
    // C++ 5.2.10p2 has a note that mentions that, subject to all other
    // restrictions, a cast to the same type is allowed. The intent is not
    // entirely clear here, since all other paragraphs explicitly forbid casts
    // to the same type. However, the behavior of compilers is pretty consistent
    // on this point: allow same-type conversion if the involved types are
    // pointers, disallow otherwise.
    return;
  }

  // Note: Clang treats enumeration types as integral types. If this is ever
  // changed for C++, the additional check here will be redundant.
  if (DestType->isIntegralType() && !DestType->isEnumeralType()) {
    assert(srcIsPtr && "One type must be a pointer");
    // C++ 5.2.10p4: A pointer can be explicitly converted to any integral
    //   type large enough to hold it.
    if (Self.Context.getTypeSize(SrcType) >
        Self.Context.getTypeSize(DestType)) {
      Self.Diag(OpRange.getBegin(), diag::err_bad_reinterpret_cast_small_int)
        << OrigDestType << DestRange;
    }
    return;
  }

  if (SrcType->isIntegralType() || SrcType->isEnumeralType()) {
    assert(destIsPtr && "One type must be a pointer");
    // C++ 5.2.10p5: A value of integral or enumeration type can be explicitly
    //   converted to a pointer.
    return;
  }

  if (!destIsPtr || !srcIsPtr) {
    // With the valid non-pointer conversions out of the way, we can be even
    // more stringent.
    Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_generic)
      << "reinterpret_cast" << OrigDestType << OrigSrcType << OpRange;
    return;
  }

  // C++ 5.2.10p2: The reinterpret_cast operator shall not cast away constness.
  if (CastsAwayConstness(Self, SrcType, DestType)) {
    Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_const_away)
      << "reinterpret_cast" << OrigDestType << OrigSrcType << OpRange;
    return;
  }

  // Not casting away constness, so the only remaining check is for compatible
  // pointer categories.

  if (SrcType->isFunctionPointerType()) {
    if (DestType->isFunctionPointerType()) {
      // C++ 5.2.10p6: A pointer to a function can be explicitly converted to
      // a pointer to a function of a different type.
      return;
    }

    // C++0x 5.2.10p8: Converting a pointer to a function into a pointer to
    //   an object type or vice versa is conditionally-supported.
    // Compilers support it in C++03 too, though, because it's necessary for
    // casting the return value of dlsym() and GetProcAddress().
    // FIXME: Conditionally-supported behavior should be configurable in the
    // TargetInfo or similar.
    if (!Self.getLangOptions().CPlusPlus0x) {
      Self.Diag(OpRange.getBegin(), diag::ext_reinterpret_cast_fn_obj)
        << OpRange;
    }
    return;
  }

  if (DestType->isFunctionPointerType()) {
    // See above.
    if (!Self.getLangOptions().CPlusPlus0x) {
      Self.Diag(OpRange.getBegin(), diag::ext_reinterpret_cast_fn_obj)
        << OpRange;
    }
    return;
  }

  // C++ 5.2.10p7: A pointer to an object can be explicitly converted to
  //   a pointer to an object of different type.
  // Void pointers are not specified, but supported by every compiler out there.
  // So we finish by allowing everything that remains - it's got to be two
  // object pointers.
}
  Expr* ValueExtractionSynthesizer::SynthesizeSVRInit(Expr* E) {
    if (!m_gClingVD)
      FindAndCacheRuntimeDecls();

    // Build a reference to gCling
    ExprResult gClingDRE
      = m_Sema->BuildDeclRefExpr(m_gClingVD, m_Context->VoidPtrTy,
                                 VK_RValue, SourceLocation());
    // We have the wrapper as Sema's CurContext
    FunctionDecl* FD = cast<FunctionDecl>(m_Sema->CurContext);

    ExprWithCleanups* Cleanups = 0;
    // In case of ExprWithCleanups we need to extend its 'scope' to the call.
    if (E && isa<ExprWithCleanups>(E)) {
      Cleanups = cast<ExprWithCleanups>(E);
      E = Cleanups->getSubExpr();
    }

    // Build a reference to Value* in the wrapper, should be
    // the only argument of the wrapper.
    SourceLocation locStart = (E) ? E->getLocStart() : FD->getLocStart();
    SourceLocation locEnd = (E) ? E->getLocEnd() : FD->getLocEnd();
    ExprResult wrapperSVRDRE
      = m_Sema->BuildDeclRefExpr(FD->getParamDecl(0), m_Context->VoidPtrTy,
                                 VK_RValue, locStart);
    QualType ETy = (E) ? E->getType() : m_Context->VoidTy;
    QualType desugaredTy = ETy.getDesugaredType(*m_Context);

    // The expr result is transported as reference, pointer, array, float etc
    // based on the desugared type. We should still expose the typedef'ed
    // (sugared) type to the cling::Value.
    if (desugaredTy->isRecordType() && E->getValueKind() == VK_LValue) {
      // returning a lvalue (not a temporary): the value should contain
      // a reference to the lvalue instead of copying it.
      desugaredTy = m_Context->getLValueReferenceType(desugaredTy);
      ETy = m_Context->getLValueReferenceType(ETy);
    }
    Expr* ETyVP
      = utils::Synthesize::CStyleCastPtrExpr(m_Sema, m_Context->VoidPtrTy,
                                             (uintptr_t)ETy.getAsOpaquePtr());

    // Pass whether to Value::dump() or not:
    Expr* EVPOn
      = new (*m_Context) CharacterLiteral(getCompilationOpts().ValuePrinting,
                                          CharacterLiteral::Ascii,
                                          m_Context->CharTy,
                                          SourceLocation());

    llvm::SmallVector<Expr*, 6> CallArgs;
    CallArgs.push_back(gClingDRE.get());
    CallArgs.push_back(wrapperSVRDRE.get());
    CallArgs.push_back(ETyVP);
    CallArgs.push_back(EVPOn);

    ExprResult Call;
    SourceLocation noLoc = locStart;
    if (desugaredTy->isVoidType()) {
      // In cases where the cling::Value gets reused we need to reset the
      // previous settings to void.
      // We need to synthesize setValueNoAlloc(...), E, because we still need
      // to run E.

      // FIXME: Suboptimal: this discards the already created AST nodes.
      QualType vpQT = m_Context->VoidPtrTy;
      QualType vQT = m_Context->VoidTy;
      Expr* vpQTVP
        = utils::Synthesize::CStyleCastPtrExpr(m_Sema, vpQT,
                                               (uintptr_t)vQT.getAsOpaquePtr());
      CallArgs[2] = vpQTVP;


      Call = m_Sema->ActOnCallExpr(/*Scope*/0, m_UnresolvedNoAlloc,
                                   locStart, CallArgs, locEnd);

      if (E)
        Call = m_Sema->CreateBuiltinBinOp(locStart, BO_Comma, Call.get(), E);

    }
    else if (desugaredTy->isRecordType() || desugaredTy->isConstantArrayType()
             || desugaredTy->isMemberPointerType()) {
      // 2) object types :
      // check existence of copy constructor before call
      if (!desugaredTy->isMemberPointerType()
          && !availableCopyConstructor(desugaredTy, m_Sema))
        return E;
      // call new (setValueWithAlloc(gCling, &SVR, ETy)) (E)
      Call = m_Sema->ActOnCallExpr(/*Scope*/0, m_UnresolvedWithAlloc,
                                   locStart, CallArgs, locEnd);
      Expr* placement = Call.get();
      if (const ConstantArrayType* constArray
          = dyn_cast<ConstantArrayType>(desugaredTy.getTypePtr())) {
        CallArgs.clear();
        CallArgs.push_back(E);
        CallArgs.push_back(placement);
        size_t arrSize
          = m_Context->getConstantArrayElementCount(constArray);
        Expr* arrSizeExpr
          = utils::Synthesize::IntegerLiteralExpr(*m_Context, arrSize);

        CallArgs.push_back(arrSizeExpr);
        // 2.1) arrays:
        // call copyArray(T* src, void* placement, size_t size)
        Call = m_Sema->ActOnCallExpr(/*Scope*/0, m_UnresolvedCopyArray,
                                     locStart, CallArgs, locEnd);

      }
      else {
        if (!E->getSourceRange().isValid()) {
          // We cannot do CXXNewExpr::CallInit (see Sema::BuildCXXNew) but
          // that's what we want. Fail...
          return E;
        }
        TypeSourceInfo* ETSI
          = m_Context->getTrivialTypeSourceInfo(ETy, noLoc);

        Call = m_Sema->BuildCXXNew(E->getSourceRange(),
                                   /*useGlobal ::*/true,
                                   /*placementLParen*/ noLoc,
                                   MultiExprArg(placement),
                                   /*placementRParen*/ noLoc,
                                   /*TypeIdParens*/ SourceRange(),
                                   /*allocType*/ ETSI->getType(),
                                   /*allocTypeInfo*/ETSI,
                                   /*arraySize*/0,
                                   /*directInitRange*/E->getSourceRange(),
                                   /*initializer*/E,
                                   /*mayContainAuto*/false
                                   );
        // Handle possible cleanups:
        Call = m_Sema->ActOnFinishFullExpr(Call.get());
      }
    }
    else {
      // Mark the current number of arguemnts
      const size_t nArgs = CallArgs.size();
      if (desugaredTy->isIntegralOrEnumerationType()) {
        // 1)  enum, integral, float, double, referece, pointer types :
        //      call to cling::internal::setValueNoAlloc(...);

        // If the type is enum or integral we need to force-cast it into
        // uint64 in order to pick up the correct overload.
        if (desugaredTy->isIntegralOrEnumerationType()) {
          QualType UInt64Ty = m_Context->UnsignedLongLongTy;
          TypeSourceInfo* TSI
            = m_Context->getTrivialTypeSourceInfo(UInt64Ty, noLoc);
          Expr* castedE
            = m_Sema->BuildCStyleCastExpr(noLoc, TSI, noLoc, E).get();
          CallArgs.push_back(castedE);
        }
      }
      else if (desugaredTy->isReferenceType()) {
        // we need to get the address of the references
        Expr* AddrOfE = m_Sema->BuildUnaryOp(/*Scope*/0, noLoc, UO_AddrOf,
                                             E).get();
        CallArgs.push_back(AddrOfE);
      }
      else if (desugaredTy->isAnyPointerType()) {
        // function pointers need explicit void* cast.
        QualType VoidPtrTy = m_Context->VoidPtrTy;
        TypeSourceInfo* TSI
          = m_Context->getTrivialTypeSourceInfo(VoidPtrTy, noLoc);
        Expr* castedE
          = m_Sema->BuildCStyleCastExpr(noLoc, TSI, noLoc, E).get();
        CallArgs.push_back(castedE);
      }
      else if (desugaredTy->isNullPtrType()) {
        // nullptr should decay to void* just fine.
        CallArgs.push_back(E);
      }
      else if (desugaredTy->isFloatingType()) {
        // floats and double will fall naturally in the correct
        // case, because of the overload resolution.
        CallArgs.push_back(E);
      }

      // Test CallArgs.size to make sure an additional argument (the value)
      // has been pushed on, if not than we didn't know how to handle the type
      if (CallArgs.size() > nArgs) {
        Call = m_Sema->ActOnCallExpr(/*Scope*/0, m_UnresolvedNoAlloc,
                                   locStart, CallArgs, locEnd);
      }
      else {
        m_Sema->Diag(locStart, diag::err_unsupported_unknown_any_decl) <<
          utils::TypeName::GetFullyQualifiedName(desugaredTy, *m_Context) <<
          SourceRange(locStart, locEnd);
      }
    }


    assert(!Call.isInvalid() && "Invalid Call");

    // Extend the scope of the temporary cleaner if applicable.
    if (Cleanups) {
      Cleanups->setSubExpr(Call.get());
      Cleanups->setValueKind(Call.get()->getValueKind());
      Cleanups->setType(Call.get()->getType());
      return Cleanups;
    }
    return Call.get();
  }