Use SmallVector instead of std::vector.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41207 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Utils/LoopSimplify.cpp

@@ -199,7 +199,7 @@ ReprocessLoop:
   // predecessors that are inside of the loop.  This check guarantees that the
   // loop preheader/header will dominate the exit blocks.  If the exit block has
   // predecessors from outside of the loop, split the edge now.
-  std::vector<BasicBlock*> ExitBlocks;
+  SmallVector<BasicBlock*, 8> ExitBlocks;
   L->getExitBlocks(ExitBlocks);
     
   SetVector<BasicBlock*> ExitBlockSet(ExitBlocks.begin(), ExitBlocks.end());