Use unique_ptr to clarify ownership of ScopStmt

llvm-svn: 238090
diff --git a/polly/lib/Transform/ScheduleOptimizer.cpp b/polly/lib/Transform/ScheduleOptimizer.cpp
index 6bf6718..36cccd8 100644
--- a/polly/lib/Transform/ScheduleOptimizer.cpp
+++ b/polly/lib/Transform/ScheduleOptimizer.cpp
@@ -467,7 +467,7 @@
 
   S.markAsOptimized();
 
-  for (ScopStmt *Stmt : S) {
+  for (auto &Stmt : S) {
     isl_map *StmtSchedule;
     isl_set *Domain = Stmt->getDomain();
     isl_union_map *StmtBand;