https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77713
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> --- It looks to me like the failures might be due to bad assumptions in the test about the precision of type short, and due to bad assumptions about the output of %a made in the pass itself. Let me look into fixing the former under this bug but please go ahead and open a new bug for the %a failures. They were pointed out on the gcc-patches list (https://gcc.gnu.org/ml/gcc-patches/2016-09/msg01684.html) but I don't think there is a bug for them in Bugzilla yet. Thanks for your help and patience!