diff --git a/lib/Target/SubtargetFeature.cpp b/lib/Target/SubtargetFeature.cpp
index 590574e..1085668 100644
--- a/lib/Target/SubtargetFeature.cpp
+++ b/lib/Target/SubtargetFeature.cpp
@@ -110,6 +110,33 @@
   }
 }
 
+/// Add a set of features from the comma-separated string.
+void SubtargetFeatures::AddFeatures(const std::string &String)
+{
+  std::vector<std::string> _Features;
+
+  Split(_Features, String);
+  // Nothing is specified.
+  if (_Features.size() == 0)
+    return;
+
+  for (std::vector<std::string>::iterator it = _Features.begin(),
+          end = _Features.end(); it != end; ++it) {
+    // AddFeature will take care of feature string normalization.
+    AddFeature(*it);
+  }
+}
+
+/// Add a set of features from the parsed command line parameters.
+void SubtargetFeatures::AddFeatures(const cl::list<std::string> &List)
+{
+  for (cl::list<std::string>::const_iterator it = List.begin(),
+          end = List.end(); it != end; ++it) {
+    // AddFeature will take care of feature string normalization.
+    AddFeature(*it);
+  }
+}
+
 /// Find KV in array using binary search.
 template<typename T> const T *Find(const std::string &S, const T *A, size_t L) {
   // Make the lower bound element we're looking for