1 files changed, 8 insertions, 0 deletions
diff --git a/src/wasm-type.h b/src/wasm-type.h
index 0e159b3a9..f600f2e79 100644
--- a/src/wasm-type.h
+++ b/src/wasm-type.h
@@ -177,6 +177,8 @@ public:
   // Gets the heap type corresponding to this type
   HeapType getHeapType() const;
 
+  const struct Rtt& getRtt() const;
+
   // Returns a number type based on its size in bytes and whether it is a float
   // type.
   static Type get(unsigned byteSize, bool float_);
@@ -430,14 +432,20 @@ struct Array {
 };
 
 struct Rtt {
+  enum {
+    // An Rtt can have no depth specified
+    NoDepth = -1
+  };
   uint32_t depth;
   HeapType heapType;
+  Rtt(HeapType heapType) : depth(NoDepth), heapType(heapType) {}
   Rtt(uint32_t depth, HeapType heapType) : depth(depth), heapType(heapType) {}
   bool operator==(const Rtt& other) const {
     return depth == other.depth && heapType == other.heapType;
   }
   bool operator!=(const Rtt& other) const { return !(*this == other); }
   bool operator<(const Rtt& other) const;
+  bool hasDepth() { return depth != uint32_t(NoDepth); }
   std::string toString() const;
 };