Add+Use mir::BinOp::Cmp

compiler/stable_mir/src/mir/body.rs

@@ -329,6 +329,7 @@ pub enum BinOp {
     Ne,
     Ge,
     Gt,
+    Cmp,
     Offset,
 }
 
@@ -368,6 +369,9 @@ impl BinOp {
                 assert!(lhs_kind.is_primitive() || lhs_kind.is_raw_ptr() || lhs_kind.is_fn_ptr());
                 Ty::bool_ty()
             }
+            BinOp::Cmp => {
+                unimplemented!("Should cmp::Ordering be a RigidTy?");
+            }
         }
     }
 }