* dwarf2out.c (add_bound_info): Don't crash if SAVE_EXPR_RTL is
        NULL.
        (gen_subprogram_die): Don't abort on seeing a second definition if
        the previous one was abstract.  Don't replace an abstract instance
        in the lookup table.

        * dwarf2out.c (dwarf2out_abstract_function): Rename from
        gen_abstract_function.
        * dwarf2out.h: Declare it.
        * toplev.c (note_outlining_of_inline_function): New fn.
        * toplev.h: Declare it.
        * integrate.c (output_inline_function): Call it.
        * c-decl.c (duplicate_decls): Call it when redefining an extern
        inline.  Don't inline the new defn.

From-SVN: r39763