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/* { dg-do compile } */

/* { dg-options "-O2 -Wuninitialized" } */

typedef union tree_node *tree;

struct tree_common

{

  tree chain;

};

struct tree_decl

{

  struct tree_common common;

  tree name;

};

union tree_node

{

  struct tree_common common;

  struct tree_decl decl;

};

int pedantic;

void

finish_struct (tree t, tree fieldlist, tree attributes)

{

  union tree_node * x;

  if (pedantic)

    {

      x = fieldlist;

      if (x->decl.name == 0)

        {

          while (x)

            x = x->common.chain;

          foo (fieldlist);

        }

    }

  x = fieldlist;

  if (x)

    {

      do

        {

          x = x->common.chain;

        } while (x != 0);

    }

  bar1 (&fieldlist);

}