1 files changed, 18 insertions, 6 deletions
diff --git a/src/ir/module-splitting.cpp b/src/ir/module-splitting.cpp
index f299d7a35..a7ee96fa2 100644
--- a/src/ir/module-splitting.cpp
+++ b/src/ir/module-splitting.cpp
@@ -146,12 +146,24 @@ void TableSlotManager::addSlot(Name func, Slot slot) {
 }
 
 TableSlotManager::TableSlotManager(Module& module) : module(module) {
-  if (module.features.hasReferenceTypes()) {
-    // Just create a new table to manage all primary-to-secondary calls lazily.
-    // Do not re-use slots for functions that will already be in existing
-    // tables, since that is not correct in the face of table mutations.
-    // TODO: Reduce overhead by creating a separate table for each function type
-    // if WasmGC is enabled.
+  // If possible, just create a new table to manage all primary-to-secondary
+  // calls lazily. Do not re-use slots for functions that will already be in
+  // existing tables, since that is not correct in the face of table mutations.
+  // However, do not do this for emscripten; its loader code (and dynamic
+  // loading in particular) do not support this yet.
+  // TODO: Reduce overhead by creating a separate table for each function type
+  // if WasmGC is enabled.
+  Export* emscriptenTableExport =
+    module.getExportOrNull("__indirect_function_table");
+  Table* singletonTable =
+    module.tables.size() == 1 ? module.tables[0].get() : nullptr;
+  bool emscriptenTableImport =
+    singletonTable && singletonTable->imported() &&
+    singletonTable->module == "env" &&
+    singletonTable->base == "__indirect_function_table";
+
+  if (module.features.hasReferenceTypes() && !emscriptenTableExport &&
+      !emscriptenTableImport) {
     return;
   }