1 files changed, 5 insertions, 0 deletions
diff --git a/src/wasm.h b/src/wasm.h
index 3b736fcbc..b8e3d6704 100644
--- a/src/wasm.h
+++ b/src/wasm.h
@@ -1457,6 +1457,11 @@ public:
   Expression* rtt = nullptr;
   HeapType intendedType;
 
+  // Support the unsafe `ref.cast_nop_static` to enable precise cast overhead
+  // measurements.
+  enum Safety { Safe, Unsafe };
+  Safety safety;
+
   void finalize();
 
   // Returns the type we intend to cast to.