The second patch of X86 support for read cycle counter.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24430 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.h b/lib/Target/X86/X86ISelLowering.h
index b4468ac..ccec6ea 100644
--- a/lib/Target/X86/X86ISelLowering.h
+++ b/lib/Target/X86/X86ISelLowering.h
@@ -62,6 +62,10 @@
       /// LLVM.
       CALL,
       TAILCALL,
+      
+      /// RDTSC_DAG - This operation implements the lowering for 
+      /// readcyclecounter
+      RDTSC_DAG,
     };
   }