https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62289
--- Comment #3 from Tobias Burnus <burnus at gcc dot gnu.org> --- (In reply to amker from comment #1) > Some comments on it at > https://gcc.gnu.org/ml/gcc-patches/2014-08/msg02274.html Namely: > This is a bug in ISL. Theyâll fix it in a new version of ISL. > https://groups.google.com/forum/#!topic/isl-development/SeNZf5IA-Lk The thread lists the ISL patch, https://11523367451463622537.googlegroups.com/attach/9eb3bcd38b58b2b1/diff and: "Does the attached help?" - "Yes, It helps to fix the problem in isl-0.13."