1 files changed, 42 insertions, 0 deletions
diff --git a/deps/v8/test/debugger/debug/wasm/debug-enabled-tier-down-wasm-unsupported-liftoff.js b/deps/v8/test/debugger/debug/wasm/debug-enabled-tier-down-wasm-unsupported-liftoff.js
new file mode 100644
index 0000000000..e7ba10349c
--- /dev/null
+++ b/deps/v8/test/debugger/debug/wasm/debug-enabled-tier-down-wasm-unsupported-liftoff.js
@@ -0,0 +1,42 @@
+// Copyright 2020 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --experimental-wasm-anyref
+
+load("test/mjsunit/wasm/wasm-module-builder.js");
+
+// Create a simple Wasm module.
+function create_builder(i) {
+  const builder = new WasmModuleBuilder();
+  builder.addFunction('main', kSig_i_r)
+  .addBody([
+    kExprLocalGet, 0, kExprRefIsNull,
+    ...wasmI32Const(i),
+    kExprI32Add])
+  .exportFunc();
+  return builder;
+}
+
+const instance = create_builder(0).instantiate();
+
+// Test recompilation.
+const Debug = new DebugWrapper();
+Debug.enable();
+assertFalse(%IsLiftoffFunction(instance.exports.main));
+const newInstance = create_builder(1).instantiate();
+assertFalse(%IsLiftoffFunction(newInstance.exports.main));
+
+// Async.
+async function testTierDownToLiftoffAsync() {
+  Debug.disable();
+  const asyncInstance = await create_builder(2).asyncInstantiate();
+
+  // Test recompilation.
+  Debug.enable();
+  assertFalse(%IsLiftoffFunction(asyncInstance.exports.main));
+  const newAsyncInstance = await create_builder(3).asyncInstantiate();
+  assertFalse(%IsLiftoffFunction(newAsyncInstance.exports.main));
+}
+
+assertPromiseResult(testTierDownToLiftoffAsync());