Need help: Is a VAR_DECL type builtin or not?

[Dominik Vogt]

Given a specific VAR_DECL tree node, I need to find out whether
its type is built in or not.  Up to now I have

  tree tn = TYPE_NAME (TREE_TYPE (var_decl));
  if (tn != NULL_TREE && TREE_CODE (tn) == TYPE_DECL && DECL_NAME (tn))
    {
      ...
    }

This if-condition is true for both,

  int x;
  const int x;
  ...

and

  typedef int i_t;
  i_t x;
  const i_t x;
  ...

I need to weed out the class of VAR_DECLs that directly use built
in types.

Ciao

Dominik ^_^  ^_^

-- 

Dominik Vogt
IBM Germany