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/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-optimized" } */
 
 
union tree_node;
typedef union tree_node *tree;
 
enum tree_code
{
  ARRAY_TYPE,
  LAST_AND_UNUSED_TREE_CODE
};
 
struct tree_common
{
  enum tree_code code:8;
};
 
 
 
 
 
union tree_node
{
  struct tree_common common;
};
 
 
 
 
int
objects_must_conflict_p (t1, t2)
     tree t1, t2;
{
 
  if ((t1->common.code == ARRAY_TYPE) != (t2
                                          && t2->common.code == ARRAY_TYPE))
    return 11;
 
 
  return foo (t2 ? get_alias_set (t2) : 0);
}
 
/* There should be two assignments of variables to the value zero.  */
/* { dg-final { scan-tree-dump-times " = 0" 2 "optimized"} } */
 
/* { dg-final { cleanup-tree-dump "optimized" } } */