2001-02-07  Andrew Haley  <aph@redhat.com>

        * gcj.texi (Configure-time Options): Add -fcheck-references.
        * expr.c (build_java_indirect_ref): New function.
        (build_java_array_length_access): Use build_java_indirect_ref to
        check for null references.
        (build_java_arrayaccess): Likewise.
        (build_get_class): Likewise.
        (build_field_ref): Likewise.
        (invoke_build_dtable): Likewise.
        (build_invokeinterface): Likewise.
        * lang.c (lang_f_options): Add flag_check_references.
        * jvspec.c (jvgenmain_spec): Add flag_check_references.
        * java-tree.h (flag_check_references): New variable.
        * lang.c (flag_check_references): Likewise.

From-SVN: r40780