Bug 1757273 - wasm: Fix more uncovered bustage. r=lth

Differential Revision: https://phabricator.services.mozilla.com/D139864

js/src/wasm/WasmInstance.cpp

@@ -2149,12 +2149,12 @@ bool Instance::callExport(JSContext* cx, uint32_t funcIndex, CallArgs args,
   return true;
 }
 
+#ifdef ENABLE_WASM_EXCEPTIONS
 static JSObject* GetExceptionTag(JSObject* exn) {
   return exn->is<WasmExceptionObject>() ? &exn->as<WasmExceptionObject>().tag()
                                         : nullptr;
 }
 
-#ifdef ENABLE_WASM_EXCEPTIONS
 void Instance::setPendingException(HandleAnyRef exn) {
   tlsData()->pendingException = exn.get().asJSObject();
   tlsData()->pendingExceptionTag = GetExceptionTag(exn.get().asJSObject());

js/src/wasm/WasmModuleTypes.cpp

@@ -230,6 +230,8 @@ size_t TagType::sizeOfExcludingThis(MallocSizeOf mallocSizeOf) const {
          argOffsets_.sizeOfExcludingThis(mallocSizeOf);
 }
 
+#ifdef ENABLE_WASM_EXCEPTIONS
+
 size_t TagDesc::serializedSize() const {
   return sizeof(kind) + type.serializedSize() + sizeof(globalDataOffset) +
          sizeof(isExport);
@@ -256,6 +258,8 @@ size_t TagDesc::sizeOfExcludingThis(MallocSizeOf mallocSizeOf) const {
   return type.sizeOfExcludingThis(mallocSizeOf);
 }
 
+#endif // ENABLE_WASM_EXCEPTIONS
+
 size_t ElemSegment::serializedSize() const {
   return sizeof(kind) + sizeof(tableIndex) + sizeof(elemType) +
          SerializedMaybeSize(offsetIfActive) +