http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52178
--- Comment #10 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-02-13 13:42:49 UTC --- Should PLACEHOLDER_EXPRs even survive gimplification? I see tree.c says if they survive until expand we'll ICE - but that comment is probably from before gimple/SSA times.