Use unique_ptr to clarify ownership of ScopStmt

llvm-svn: 238090
diff --git a/polly/lib/CodeGen/Utils.cpp b/polly/lib/CodeGen/Utils.cpp
index f2ddfd5..fa9a209 100644
--- a/polly/lib/CodeGen/Utils.cpp
+++ b/polly/lib/CodeGen/Utils.cpp
@@ -37,7 +37,7 @@
     std::string OldName = OldBlock->getName();
 
     // Update ScopInfo.
-    for (ScopStmt *Stmt : S)
+    for (auto &Stmt : S)
       if (Stmt->getBasicBlock() == OldBlock) {
         Stmt->setBasicBlock(NewBlock);
         break;