Upload Kmake

deps/v8/test/mjsunit/compiler/regress-crbug-1221812.js

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+// Copyright 2021 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 C(a, b) {
+  this.a = a;
+  this.b = b;
+}
+
+var c = new C(42, 4.2);
+var cc = new C(4.2, 42);
+
+function foo() { return cc.a }
+
+%PrepareFunctionForOptimization(foo);
+assertEquals(4.2, foo());
+
+// Transition representation of 'a' from Double to Tagged.
+Object.defineProperty(c, 'a', { value: undefined });
+
+%OptimizeFunctionOnNextCall(foo);
+assertEquals(4.2, foo());