Use #pragma once

1 files changed, 2 insertions, 0 deletions

diff --git a/src/ir.h b/src/ir.h
index b104b1e..f54c2fb 100644
--- a/src/ir.h
+++ b/src/ir.h
@@ -1,3 +1,5 @@
+#pragma once
+
 #include "antcc.h"
 #include "c_type.h"