MemDepPrinter: Fix some nits introduced in r228596

lib/Analysis/MemDepPrinter.cpp

const char *const MemDepPrinter::DepTypeStr[]
   = {"Clobber", "Def", "NonFuncLocal", "Unknown"};
 
 bool MemDepPrinter::runOnFunction(Function &F) {
   this->F = &F;
   MemoryDependenceAnalysis &MDA = getAnalysis<MemoryDependenceAnalysis>();
 
   // All this code uses non-const interfaces because MemDep is not
   // const-friendly, though nothing is actually modified.
-  for (auto &I: inst_range(F)) {
+  for (auto &I : inst_range(F)) {
     Instruction *Inst = &I;
 
     if (!Inst->mayReadFromMemory() && !Inst->mayWriteToMemory())
       continue;
 
     MemDepResult Res = MDA.getDependency(Inst);
     if (!Res.isNonLocal()) {
       Deps[Inst].insert(std::make_pair(getInstTypePair(Res),
if (!Res.isNonLocal()) {
       }
     }
   }
 
   return false;
 }
 
 void MemDepPrinter::print(raw_ostream &OS, const Module *M) const {
-  for (auto &I: inst_range(*F)) {
+  for (const auto &I : inst_range(*F)) {
     const Instruction *Inst = &I;
 
     DepSetMap::const_iterator DI = Deps.find(Inst);
     if (DI == Deps.end())
       continue;
 
     const DepSet &InstDeps = DI->second;
 
-    for (auto &I: InstDeps) {
+    for (const auto &I : InstDeps) {
       const Instruction *DepInst = I.first.getPointer();
       DepType type = I.first.getInt();
       const BasicBlock *DepBB = I.second;
 
       OS << "    ";
       OS << DepTypeStr[type];
       if (DepBB) {
         OS << " in block ";