https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66732
--- Comment #2 from jamespharvey20 at gmail dot com --- Patches https://gcc.gnu.org/ml/gcc-patches/2015-07/msg01162.html and https://gcc.gnu.org/ml/gcc-patches/2015-07/msg01506.html Appear to resolve the issue. Compiling with ISL 0.15 just fine now.
