diff --git a/lib/IR/AttributeImpl.h b/lib/IR/AttributeImpl.h
index 34754e8..91f5005 100644
--- a/lib/IR/AttributeImpl.h
+++ b/lib/IR/AttributeImpl.h
@@ -18,6 +18,7 @@
 
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/IR/Attributes.h"
+#include <string>
 
 namespace llvm {
 
@@ -92,6 +93,13 @@
 public:
   static AttributeSetNode *get(LLVMContext &C, ArrayRef<Attribute> Attrs);
 
+  bool hasAttribute(Attribute::AttrKind Kind) const;
+  bool hasAttributes() const { return !AttrList.empty(); }
+
+  unsigned getAlignment() const;
+  unsigned getStackAlignment() const;
+  std::string getAsString() const;
+
   typedef SmallVectorImpl<Attribute>::iterator       iterator;
   typedef SmallVectorImpl<Attribute>::const_iterator const_iterator;
 
@@ -152,6 +160,12 @@
     return AttributeSet::get(Context, AttrNodes[Slot]);
   }
 
+  /// \brief Retrieve the attribute set node for the given "slot" in the
+  /// AttrNode list.
+  AttributeSetNode *getSlotNode(unsigned Slot) const {
+    return AttrNodes[Slot].second;
+  }
+
   typedef AttributeSetNode::iterator       iterator;
   typedef AttributeSetNode::const_iterator const_iterator;