From 16c4b3cf2943ae2327752cf3de39769d14cfcece Mon Sep 17 00:00:00 2001
From: Bill Wendling <isanbard@gmail.com>
Date: Thu, 31 Jan 2013 23:53:05 +0000
Subject: [PATCH] Add iterators to the AttributeSet class so that we can access
 the Attributes in a nice way.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174120 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/IR/Attributes.h |  5 +++++
 lib/IR/Attributes.cpp        | 12 ++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/include/llvm/IR/Attributes.h b/include/llvm/IR/Attributes.h
index 508277c1306..49ef884b702 100644
--- a/include/llvm/IR/Attributes.h
+++ b/include/llvm/IR/Attributes.h
@@ -270,6 +270,11 @@ public:
   /// \brief Return the attributes at the index as a string.
   std::string getAsString(unsigned Index) const;
 
+  typedef ArrayRef<Attribute>::iterator iterator;
+
+  iterator begin(unsigned Idx);
+  iterator end(unsigned Idx);
+
   /// operator==/!= - Provide equality predicates.
   bool operator==(const AttributeSet &RHS) const {
     return pImpl == RHS.pImpl;
diff --git a/lib/IR/Attributes.cpp b/lib/IR/Attributes.cpp
index 14aba080abe..9d5f53bfdcd 100644
--- a/lib/IR/Attributes.cpp
+++ b/lib/IR/Attributes.cpp
@@ -740,6 +740,18 @@ AttributeSetNode *AttributeSet::getAttributes(unsigned Idx) const {
   return 0;
 }
 
+AttributeSet::iterator AttributeSet::begin(unsigned Idx) {
+  if (!pImpl)
+    return ArrayRef<Attribute>().begin();
+  return pImpl->begin(Idx);
+}
+
+AttributeSet::iterator AttributeSet::end(unsigned Idx) {
+  if (!pImpl)
+    return ArrayRef<Attribute>().end();
+  return pImpl->begin(Idx);
+}
+
 //===----------------------------------------------------------------------===//
 // AttributeSet Introspection Methods
 //===----------------------------------------------------------------------===//