Update to LLVM 3.5a.

Change-Id: Ifadecab779f128e62e430c2b4f6ddd84953ed617
diff --git a/lib/Transforms/Utils/LowerSwitch.cpp b/lib/Transforms/Utils/LowerSwitch.cpp
index 2d2a8a5..6fb7410 100644
--- a/lib/Transforms/Utils/LowerSwitch.cpp
+++ b/lib/Transforms/Utils/LowerSwitch.cpp
@@ -37,9 +37,9 @@
       initializeLowerSwitchPass(*PassRegistry::getPassRegistry());
     } 
 
-    virtual bool runOnFunction(Function &F);
-    
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+    bool runOnFunction(Function &F) override;
+
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
       // This is a cluster of orthogonal Transforms
       AU.addPreserved<UnifyFunctionExitNodes>();
       AU.addPreserved("mem2reg");
@@ -245,7 +245,8 @@
 
   // Merge case into clusters
   if (Cases.size()>=2)
-    for (CaseItr I=Cases.begin(), J=llvm::next(Cases.begin()); J!=Cases.end(); ) {
+    for (CaseItr I = Cases.begin(), J = std::next(Cases.begin());
+         J != Cases.end();) {
       int64_t nextValue = cast<ConstantInt>(J->Low)->getSExtValue();
       int64_t currentValue = cast<ConstantInt>(I->High)->getSExtValue();
       BasicBlock* nextBB = J->BB;