Upload Kmake

deps/v8/test/mjsunit/maglev/regress/regress-v8-13289.js

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+// 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: --allow-natives-syntax
+
+function Thingy() {}
+Thingy.prototype = {
+  foo: function() { return 42; }
+};
+
+const x = new Thingy();
+
+function f(o) {
+  return o.foo();
+}
+
+%PrepareFunctionForOptimization(f);
+assertEquals(42, f(x));
+%OptimizeMaglevOnNextCall(f);
+assertEquals(42, f(x));
+
+Thingy.prototype.foo = function() { return 56; }
+assertEquals(56, f(x));