[NF] Split record crefs in binding equations.

Belonging to [master]:
  - #2727
  - OpenModelica/OpenModelica-testsuite#1053

Author: perost

Compiler/NFFrontEnd/NFExpression.mo

@@ -4400,34 +4400,34 @@ public
     end match;
   end recordElement;
 
-  function splitRecord
-    input Expression recordExp;
-    output list<Expression> recordFields;
+  function splitRecordCref
+    input Expression exp;
+    output Expression outExp;
   algorithm
-    recordFields := match recordExp
+    outExp := match exp
       local
         InstNode cls;
         array<InstNode> comps;
         ComponentRef cr, field_cr;
         Type ty;
-
-      case RECORD() then recordExp.elements;
+        list<Expression> fields;
 
       case CREF(ty = Type.COMPLEX(cls = cls), cref = cr)
         algorithm
           comps := ClassTree.getComponents(Class.classTree(InstNode.getClass(cls)));
-          recordFields := {};
+          fields := {};
 
           for i in arrayLength(comps):-1:1 loop
             ty := InstNode.getType(comps[i]);
             field_cr := ComponentRef.prefixCref(comps[i], ty, {}, cr);
-            recordFields := CREF(ty, field_cr) :: recordFields;
+            fields := CREF(ty, field_cr) :: fields;
           end for;
         then
-          recordFields;
+          RECORD(InstNode.scopePath(cls), exp.ty, fields);
 
+      else exp;
     end match;
-  end splitRecord;
+  end splitRecordCref;
 
   function retype
     input output Expression exp;

Compiler/NFFrontEnd/NFFlatten.mo

@@ -527,6 +527,8 @@ algorithm
       binding_exp := SimplifyExp.simplify(binding_exp);
     end if;
 
+    binding_exp := Expression.splitRecordCref(binding_exp);
+
     // TODO: This will probably not work so well if the binding is an array that
     //       contains record non-literals. In that case we should probably
     //       create an equation for each non-literal in the array, and pass the