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References: <bug-28814-13133@http.gcc.gnu.org/bugzilla/>
Subject: [Bug tree-optimization/28814] [4.1/4.2 regression] in compare_values, at tree-vrp.c:415
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------- Comment #4 from tbm at gcc dot gnu dot org  2006-08-23 09:38 -------
Reduced testcase:

struct w49
{
  union
  {
  }
  value;
};
f9887 (struct w49 a23040)
{
  unsigned r9887;
  if (((struct structure_type24753 *) (r9887 - 1)) == ((void *) 0))
    {
      backtrace ("stalin.sc", 7222, 248274);
    }
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28814