Index: C:/LLVM/llvm/include/llvm/TableGen/Record.h
===================================================================
--- C:/LLVM/llvm/include/llvm/TableGen/Record.h
+++ C:/LLVM/llvm/include/llvm/TableGen/Record.h
@@ -1307,9 +1307,10 @@
   }
 
   bool isSubClassOf(StringRef Name) const {
-    for (const auto &SCPair : SuperClasses)
+    for (const auto &SCPair : SuperClasses) {
       if (SCPair.first->getNameInitAsString() == Name)
         return true;
+    }
     return false;
   }
 
Index: C:/LLVM/llvm/utils/TableGen/CodeGenInstruction.cpp
===================================================================
--- C:/LLVM/llvm/utils/TableGen/CodeGenInstruction.cpp
+++ C:/LLVM/llvm/utils/TableGen/CodeGenInstruction.cpp
@@ -49,7 +49,9 @@
 
   unsigned MIOperandNo = 0;
   std::set<std::string> OperandNames;
-  for (unsigned i = 0, e = InDI->getNumArgs()+OutDI->getNumArgs(); i != e; ++i){
+  unsigned e = InDI->getNumArgs()+OutDI->getNumArgs();
+  OperandList.reserve(e);
+  for (unsigned i = 0; i != e; ++i){
     Init *ArgInit;
     std::string ArgName;
     if (i < NumDefs) {
Index: C:/LLVM/llvm/utils/TableGen/CodeGenTarget.cpp
===================================================================
--- C:/LLVM/llvm/utils/TableGen/CodeGenTarget.cpp
+++ C:/LLVM/llvm/utils/TableGen/CodeGenTarget.cpp
@@ -441,6 +441,7 @@
   std::vector<Record*> I = RC.getAllDerivedDefinitions("Intrinsic");
 
   std::vector<CodeGenIntrinsic> Result;
+  Result.reserve(I.size());
 
   for (unsigned i = 0, e = I.size(); i != e; ++i) {
     bool isTarget = I[i]->getValueAsBit("isTarget");
@@ -448,7 +449,7 @@
       Result.push_back(CodeGenIntrinsic(I[i]));
   }
   std::sort(Result.begin(), Result.end(),
-            [](CodeGenIntrinsic LHS, CodeGenIntrinsic RHS) {
+            [](const CodeGenIntrinsic& LHS, const CodeGenIntrinsic& RHS) {
               return LHS.Name < RHS.Name;
             });
   return Result;