1 files changed, 27 insertions, 0 deletions
diff --git a/src/wasm/wasm-type.cpp b/src/wasm/wasm-type.cpp
index e46e0c6ae..2c7c3e232 100644
--- a/src/wasm/wasm-type.cpp
+++ b/src/wasm/wasm-type.cpp
@@ -1450,6 +1450,33 @@ bool HeapType::isSubType(HeapType left, HeapType right) {
   return SubTyper().isSubType(left, right);
 }
 
+std::vector<Type> HeapType::getTypeChildren() const {
+  if (isBasic()) {
+    return {};
+  }
+  if (isStruct()) {
+    std::vector<Type> children;
+    for (auto& field : getStruct().fields) {
+      children.push_back(field.type);
+    }
+    return children;
+  }
+  if (isArray()) {
+    return {getArray().element.type};
+  }
+  if (isSignature()) {
+    std::vector<Type> children;
+    auto sig = getSignature();
+    for (auto tuple : {sig.params, sig.results}) {
+      for (auto t : tuple) {
+        children.push_back(t);
+      }
+    }
+    return children;
+  }
+  WASM_UNREACHABLE("unexpected kind");
+}
+
 std::vector<HeapType> HeapType::getHeapTypeChildren() const {
   HeapTypeChildCollector collector;
   collector.walkRoot(const_cast<HeapType*>(this));