Split IntrReadArgMem into IntrReadMem and IntrArgMemOnly

Summary:
IntrReadWriteArgMem simply becomes IntrArgMemOnly.

So there are fewer intrinsic properties that express their orthogonality
better, and correspond more closely to the corresponding IR attributes.

Suggested by: Philip Reames

Reviewers: joker.eph, reames, tstellarAMD

Subscribers: jholewinski, arsenm, llvm-commits

Differential Revision: http://reviews.llvm.org/D19291

llvm-svn: 267021
diff --git a/llvm/utils/TableGen/CodeGenIntrinsics.h b/llvm/utils/TableGen/CodeGenIntrinsics.h
index fe1fd7f..2b47953 100644
--- a/llvm/utils/TableGen/CodeGenIntrinsics.h
+++ b/llvm/utils/TableGen/CodeGenIntrinsics.h
@@ -78,7 +78,7 @@
     };
 
     /// Memory mod/ref behavior of this intrinsic, corresponding to
-    /// intrinsic properties (IntrReadMem, IntrReadArgMem, etc.).
+    /// intrinsic properties (IntrReadMem, IntrArgMemOnly, etc.).
     enum ModRefBehavior {
       NoMem = 0,
       ReadArgMem = MR_Ref,