[SystemZ] Add floating-point test data class instructions.

These are not used by CodeGen yet - ISD combiners creating the new node
will come in subsequent patches.

llvm-svn: 274108
diff --git a/llvm/lib/Target/SystemZ/SystemZISelLowering.h b/llvm/lib/Target/SystemZ/SystemZISelLowering.h
index 97a4467..bb3b718 100644
--- a/llvm/lib/Target/SystemZ/SystemZISelLowering.h
+++ b/llvm/lib/Target/SystemZ/SystemZISelLowering.h
@@ -324,6 +324,12 @@
   // Operand 2: the type of store (i16, i32, i64)
   STRV,
 
+  // Test Data Class.
+  //
+  // Operand 0: the value to test
+  // Operand 1: the bit mask
+  TDC,
+
   // Prefetch from the second operand using the 4-bit control code in
   // the first operand.  The code is 1 for a load prefetch and 2 for
   // a store prefetch.