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deps/v8/test/mjsunit/maglev/constant-in-proto-proxy-after-holder.js

@@ -0,0 +1,36 @@
+// Copyright 2022 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: --maglev --allow-natives-syntax
+
+function foo(bar) {
+  return bar.func();
+}
+class Bar {
+  func() {}
+}
+Bar.prototype.__proto__ = new Proxy(Bar.prototype.__proto__, {
+  get() {;
+    return "42";
+  }
+});
+%PrepareFunctionForOptimization(foo);
+foo(new Bar());
+foo(new Bar());
+%OptimizeMaglevOnNextCall(foo);
+foo(new Bar());
+
+function foo_primitive(s) {
+  return s.substring();
+}
+String.prototype.__proto__ = new Proxy(String.prototype.__proto__, {
+  get() {;
+    return "42";
+  }
+});
+%PrepareFunctionForOptimization(foo_primitive);
+foo_primitive("");
+foo_primitive("");
+%OptimizeMaglevOnNextCall(foo_primitive);
+foo_primitive("");