Add a comment to describe why vector shuffles are legalized to custom DAG nodes.

[oota-llvm.git] / lib / VMCore / ConstantsContext.h

diff --git a/lib/VMCore/ConstantsContext.h b/lib/VMCore/ConstantsContext.h
index 2868f87fa4aaaac2af4969c65c3c836997df5e1a..f1d4b25e1bcdd4b90bea741533b40bc88fb61500 100644 (file)
--- a/lib/VMCore/ConstantsContext.h
+++ b/lib/VMCore/ConstantsContext.h
@@ -572,6 +572,7 @@ private:
 public:
   // NOTE: This function is not locked.  It is the caller's responsibility
   // to enforce proper synchronization.
+  typename MapTy::iterator map_begin() { return Map.begin(); }
   typename MapTy::iterator map_end() { return Map.end(); }
     
   /// InsertOrGetItem - Return an iterator for the specified element.