diff --git a/include/llvm/Analysis/DominatorInternals.h b/include/llvm/Analysis/DominatorInternals.h
index 0419688a53b..654289e6305 100644
--- a/include/llvm/Analysis/DominatorInternals.h
+++ b/include/llvm/Analysis/DominatorInternals.h
@@ -116,7 +116,7 @@ unsigned DFSPass(DominatorTreeBase<typename GraphT::NodeType>& DT,
 template<class GraphT>
 void Compress(DominatorTreeBase<typename GraphT::NodeType>& DT,
               typename GraphT::NodeType *VIn) {
-  std::vector<typename GraphT::NodeType*> Work;
+  SmallVector<typename GraphT::NodeType*, 32> Work;
   SmallPtrSet<typename GraphT::NodeType*, 32> Visited;
   typename DominatorTreeBase<typename GraphT::NodeType>::InfoRec &VInVAInfo =
                                       DT.Info[DT.Vertex[DT.Info[VIn].Ancestor]];
diff --git a/lib/Transforms/InstCombine/InstructionCombining.cpp b/lib/Transforms/InstCombine/InstructionCombining.cpp
index 47519fbaef9..de409d1ccee 100644
--- a/lib/Transforms/InstCombine/InstructionCombining.cpp
+++ b/lib/Transforms/InstCombine/InstructionCombining.cpp
@@ -1032,10 +1032,8 @@ static bool AddReachableCodeToWorklist(BasicBlock *BB,
   bool MadeIRChange = false;
   SmallVector<BasicBlock*, 256> Worklist;
   Worklist.push_back(BB);
-  
-  std::vector<Instruction*> InstrsForInstCombineWorklist;
-  InstrsForInstCombineWorklist.reserve(128);
 
+  SmallVector<Instruction*, 128> InstrsForInstCombineWorklist;
   SmallPtrSet<ConstantExpr*, 64> FoldedConstants;
   
   do {