* cvt.c (convert_lvalue): New fn.

    * cvt.c (convert_lvalue): New fn.
        * cp-tree.h: Declare it.
        * method.c (do_build_assign_ref): Use it.
        (do_build_copy_constructor): Convert parm to base types
        before calling base constructors.

        * typeck.c (check_return_expr): Check DECL_ALIGN instead of
        DECL_USER_ALIGN.  Check flag_elide_constructors instead of
        optimize.
        * semantics.c (cp_expand_stmt): Don't destroy the named return value.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@43780 138bc75d-0d04-0410-961f-82ee72b054a4