* c-typeck.c (build_offsetof): Remove.
        * c-tree.h (build_offsetof): Remove.
        * c-common.c (fold_offsetof_1, fold_offsetof): New.
        * c-common.h (fold_offsetof): Declare.
        * c-parse.in (offsetof_base): New.
        (offsetof_member_designator): Use it.  Build references, not just
        a tree list.
        (primary): Use fold_offsetof, not build_offsetof.

From-SVN: r86651