[Bug tree-optimization/20657] New: VRP does not get rid of a redundant "if" statement.

["kazu at cs dot umass dot edu" <gcc-bugzilla at gcc dot gnu dot org>]

Consider

int
foo (int a)
{
  if (a == 0)
    if (a == 0)
      return 1;
  return 0;
}

Note that the second "if" statement is redundant.

-- 
           Summary: VRP does not get rid of a redundant "if" statement.
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P2
         Component: tree-optimization
        AssignedTo: kazu at cs dot umass dot edu
        ReportedBy: kazu at cs dot umass dot edu
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20657