http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53094
--- Comment #10 from Marc Glisse <glisse at gcc dot gnu.org> 2012-12-03 19:52:39 UTC --- Created attachment 28864 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28864 minimal cumulative patch for comment #9 (In reply to comment #9) > adding it "helps" > t = build_constructor (TREE_TYPE (t), n); > + if (TREE_CODE (TREE_TYPE (t)) == VECTOR_TYPE) > + t = fold (t); > TREE_CONSTANT (t) = true; I would have put it after TREE_CONSTANT, but that's not the problem. > unfortunately generates ICE for the class constructor at cp/tree.c:2712 Indeed, cp_tree_equal is missing a VECTOR_CST case. We can likely just forward to operand_equal_p. With this patch (I am not proposing it, it conflicts with Jakub's), your last code compiles.
