Do not use the assumed context in the dependence analysis any more

This information is implicitly available through the multi-dimensionality of
memory accesses. This reduces compile time for 3mm from 430ms to 400ms and
should generally benefit compile time for cases where the assumed context
is complex.

llvm-svn: 247907

polly/lib/Analysis/DependenceInfo.cpp

@@ -265,8 +265,6 @@ void Dependences::calculateDependences(Scop &S) {
   if (isl_union_map_is_empty(AccessSchedule)) {
     isl_union_map_free(AccessSchedule);
     Schedule = S.getScheduleTree();
-    Schedule = isl_schedule_intersect_domain(
-        Schedule, isl_union_set_from_set(S.getAssumedContext()));
   } else {
     auto *ScheduleMap =
         isl_union_map_union(AccessSchedule, isl_union_map_copy(StmtSchedule));