tree-ssa-dse.c (dse_optimize_stmt): Fix up all of V_MAY_DEF and V_MUST_DEF instead of just the first_use_p.

2005-09-12  Andrew Pinski  <pinskia@physics.uc.edu>

        * tree-ssa-dse.c (dse_optimize_stmt): Fix up all of V_MAY_DEF and
        V_MUST_DEF instead of just the first_use_p.
        Don't mark the virtual variables for renaming on the statement which
        is being removed.
        (pass_dse): Remove TODO_update_ssa.

From-SVN: r104172