Index: polly/trunk/lib/CodeGen/BlockGenerators.cpp
===================================================================
--- polly/trunk/lib/CodeGen/BlockGenerators.cpp
+++ polly/trunk/lib/CodeGen/BlockGenerators.cpp
@@ -1193,7 +1193,7 @@
 
   // Iterate over all blocks in the region in a breadth-first search.
   std::deque<BasicBlock *> Blocks;
-  SmallPtrSet<BasicBlock *, 8> SeenBlocks;
+  SmallSetVector<BasicBlock *, 8> SeenBlocks;
   Blocks.push_back(EntryBB);
   SeenBlocks.insert(EntryBB);
 
@@ -1232,7 +1232,7 @@
 
     // And continue with new successors inside the region.
     for (auto SI = succ_begin(BB), SE = succ_end(BB); SI != SE; SI++)
-      if (R->contains(*SI) && SeenBlocks.insert(*SI).second)
+      if (R->contains(*SI) && SeenBlocks.insert(*SI))
         Blocks.push_back(*SI);
 
     // Remember value in case it is visible after this subregion.