https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68823
--- Comment #4 from Sebastian Pop <spop at gcc dot gnu.org> --- The data dependence relations are dumped in the output of -fdump-tree-graphite-all. graphite-dependences.c contains the code for the data dependence computations. Looking at the gimple code it seems like a trivial write after write dependence. Do we have a reduced testcase for this problem?