1 files changed, 2 insertions, 0 deletions
diff --git a/riscV/Asmexpand.ml b/riscV/Asmexpand.ml
index 3c1ef39f..3e734747 100644
--- a/riscV/Asmexpand.ml
+++ b/riscV/Asmexpand.ml
@@ -468,6 +468,8 @@ let expand_builtin_inline name args res =
                         (fun rl ->
                           emit (Pmulw (rl, X a, X b));
                           emit (Pmulhuw (rh, X a, X b)))
+  | "__builtin_nop", [], _ ->
+     emit Pnop
   (* Catch-all *)
   | _ ->
      raise (Error ("unrecognized builtin " ^ name))