diff --git a/include/llvm/IR/Attributes.h b/include/llvm/IR/Attributes.h
index 43d1fb42588..cb4275337d7 100644
--- a/include/llvm/IR/Attributes.h
+++ b/include/llvm/IR/Attributes.h
@@ -242,7 +242,7 @@ public:
   static AttributeSet get(LLVMContext &C, ArrayRef<AttributeSet> Attrs);
   static AttributeSet get(LLVMContext &C, unsigned Index,
                           ArrayRef<Attribute::AttrKind> Kind);
-  static AttributeSet get(LLVMContext &C, unsigned Index, AttrBuilder &B);
+  static AttributeSet get(LLVMContext &C, unsigned Index, const AttrBuilder &B);
 
   /// \brief Add an attribute to the attribute set at the given index. Since
   /// attribute sets are immutable, this returns a new set.
@@ -469,6 +469,8 @@ public:
   typedef std::pair<std::string, std::string>                td_type;
   typedef std::map<std::string, std::string>::iterator       td_iterator;
   typedef std::map<std::string, std::string>::const_iterator td_const_iterator;
+  typedef llvm::iterator_range<td_iterator>                  td_range;
+  typedef llvm::iterator_range<td_const_iterator>            td_const_range;
 
   td_iterator td_begin()             { return TargetDepAttrs.begin(); }
   td_iterator td_end()               { return TargetDepAttrs.end(); }
@@ -476,6 +478,11 @@ public:
   td_const_iterator td_begin() const { return TargetDepAttrs.begin(); }
   td_const_iterator td_end() const   { return TargetDepAttrs.end(); }
 
+  td_range td_attrs() { return td_range(td_begin(), td_end()); }
+  td_const_range td_attrs() const {
+    return td_const_range(td_begin(), td_end());
+  }
+
   bool td_empty() const              { return TargetDepAttrs.empty(); }
 
   bool operator==(const AttrBuilder &B);
diff --git a/lib/IR/Attributes.cpp b/lib/IR/Attributes.cpp
index 96ba7670e47..0bbbd559780 100644
--- a/lib/IR/Attributes.cpp
+++ b/lib/IR/Attributes.cpp
@@ -596,7 +596,8 @@ AttributeSet AttributeSet::get(LLVMContext &C,
   return getImpl(C, Attrs);
 }
 
-AttributeSet AttributeSet::get(LLVMContext &C, unsigned Index, AttrBuilder &B) {
+AttributeSet AttributeSet::get(LLVMContext &C, unsigned Index,
+                               const AttrBuilder &B) {
   if (!B.hasAttributes())
     return AttributeSet();
 
@@ -618,9 +619,9 @@ AttributeSet AttributeSet::get(LLVMContext &C, unsigned Index, AttrBuilder &B) {
   }
 
   // Add target-dependent (string) attributes.
-  for (AttrBuilder::td_iterator I = B.td_begin(), E = B.td_end();
-       I != E; ++I)
-    Attrs.push_back(std::make_pair(Index, Attribute::get(C, I->first,I->second)));
+  for (const AttrBuilder::td_type &TDA : B.td_attrs())
+    Attrs.push_back(
+        std::make_pair(Index, Attribute::get(C, TDA.first, TDA.second)));
 
   return get(C, Attrs);
 }