Index: llvm/trunk/lib/Transforms/Utils/SimplifyCFG.cpp
===================================================================
--- llvm/trunk/lib/Transforms/Utils/SimplifyCFG.cpp
+++ llvm/trunk/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -3754,7 +3754,7 @@
     if (!isa<DbgInfoIntrinsic>(I))
       return false;
 
-  SmallSet<BasicBlock *, 4> TrivialUnwindBlocks;
+  SmallSetVector<BasicBlock *, 4> TrivialUnwindBlocks;
   auto *PhiLPInst = cast<PHINode>(RI->getValue());
 
   // Check incoming blocks to see if any of them are trivial.