* cse.c (check_fold_consts): New static function.
        (cfc_args): New struct.
        (simplify_relational_operation): Use them in call to
        `do_float_handler'.
        * toplev.c (do_float_handler): New function to wrap calls to
        setjmp/set_float_handler.
        * toplev.h (do_float_handler): Add extern prototype.
        * tree.c (build_real_from_int_cst_1): New static function.
        (brfic_args): New struct.
        (build_real_from_int_cst): Use them in call to
        `do_float_handler'.

From-SVN: r25768