comment update

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54576 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 1 deletions

diff --git a/include/llvm/Constant.h b/include/llvm/Constant.h
index 2679c10789..faaced8041 100644
--- a/include/llvm/Constant.h
+++ b/include/llvm/Constant.h
@@ -83,7 +83,8 @@ public:
   
   /// getVectorElements - This method, which is only valid on constant of vector
   /// type, returns the elements of the vector in the specified smallvector.
-  /// This handles breaking down a vector undef into undef elements, etc.
+  /// This handles breaking down a vector undef into undef elements, etc.  For
+  /// constant exprs and other cases we can't handle, we return an empty vector.
   void getVectorElements(SmallVectorImpl<Constant*> &Elts) const;
 
   /// destroyConstant - Called if some element of this constant is no longer