http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53880
--- Comment #8 from stevenb.gcc at gmail dot com <stevenb.gcc at gmail dot com> 2012-07-24 08:16:01 UTC --- (In reply to comment #7) I don't think it's really called from there. It should be called from gt_pch_save. gt_pch_nx_line_maps only registers the function (for pointer rewriting, AFAIU).