Index: llvm/trunk/lib/IR/Attributes.cpp
===================================================================
--- llvm/trunk/lib/IR/Attributes.cpp
+++ llvm/trunk/lib/IR/Attributes.cpp
@@ -1380,7 +1380,7 @@
     return true;
 
   // Then check if any target dependent ones do.
-  for (auto I : td_attrs())
+  for (const auto &I : td_attrs())
     if (B.contains(I.first))
       return true;
 
Index: llvm/trunk/lib/Transforms/Utils/CodeExtractor.cpp
===================================================================
--- llvm/trunk/lib/Transforms/Utils/CodeExtractor.cpp
+++ llvm/trunk/lib/Transforms/Utils/CodeExtractor.cpp
@@ -364,7 +364,7 @@
   //           attribute can not be inherited.
   AttributeSet OldFnAttrs = oldFunction->getAttributes().getFnAttributes();
   AttrBuilder AB(OldFnAttrs, AttributeSet::FunctionIndex);
-  for (auto Attr : AB.td_attrs())
+  for (const auto &Attr : AB.td_attrs())
     newFunction->addFnAttr(Attr.first, Attr.second);
 
   newFunction->getBasicBlockList().push_back(newRootNode);