diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h
index 2fb156db3f0..21d4335720d 100644
--- a/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -216,9 +216,10 @@ namespace ISD {
 
     // BIT_CONVERT - Theis operator converts between integer and FP values, as
     // if one was stored to memory as integer and the other was loaded from the
-    // same address.  The source and result are required to have the same bit
-    // size (e.g. f32 <-> i32).  This can also be used for int-to-int or 
-    // fp-to-fp conversions, but that is a noop, deleted by getNode().
+    // same address (or equivalently for vector format conversions, etc).  The 
+    // source and result are required to have the same bit size (e.g. 
+    // f32 <-> i32).  This can also be used for int-to-int or fp-to-fp 
+    // conversions, but that is a noop, deleted by getNode().
     BIT_CONVERT,
     
     // FNEG, FABS, FSQRT, FSIN, FCOS - Perform unary floating point negation,