do not recreate objects

Belonging to [master]:
  - #2089

Author: hkiel

Compiler/BackEnd/BackendVariable.mo

@@ -2995,11 +2995,11 @@ algorithm
         (_,b) = replaceVarWithWholeDimSubs(rest,iPerformed);
       then (DAE.WHOLEDIM()::rest, b);
 
-    case (DAE.SLICE(exp = sub_exp)::rest, _)
+    case ((sub as DAE.SLICE(exp = sub_exp))::rest, _)
       equation
         (res,b) = replaceVarWithWholeDimSubs(rest,iPerformed);
         const = Expression.isConst(sub_exp);
-        res = if const then DAE.SLICE(sub_exp)::rest else (DAE.WHOLEDIM()::rest);
+        res = if const then sub::rest else (DAE.WHOLEDIM()::rest);
       then
         (res, b or not const);
 

Compiler/FrontEnd/Types.mo

@@ -3433,13 +3433,6 @@ algorithm
       DAE.Dimensions dims;
       DAE.Dimension dim;
 
-    // Array type
-    case DAE.T_ARRAY(dims = {dim})
-      equation
-        (ty, dims) = flattenArrayType(inType.ty);
-      then
-        (ty, dim :: dims);
-
     // Array type
     case DAE.T_ARRAY()
       equation