918fe04351
PR-URL: https://github.com/nodejs/node/pull/58070 Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: Darshan Sen <raisinten@gmail.com> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
37 lines
1.0 KiB
JavaScript
37 lines
1.0 KiB
JavaScript
// Copyright 2024 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax --turbolev --turbofan
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// Flags: --no-always-turbofan
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function A() { this.x = 1 }
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function B() { this.x = 1 }
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function migrate_and_load(o) {
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return o.x;
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}
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let old_b1 = new B();
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let old_b2 = new B();
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old_b1.x = 42;
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old_b2.x = 186;
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%PrepareFunctionForOptimization(migrate_and_load);
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assertEquals(1, migrate_and_load(new A()));
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(new A()).x = 4.25; // Deprecate map already in feedback
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(new B()).x = 4.25; // Deprecate old_b1/old_b2 map
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assertEquals(42, migrate_and_load(old_b1));
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%OptimizeFunctionOnNextCall(migrate_and_load);
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assertEquals(42, migrate_and_load(old_b1));
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assertOptimized(migrate_and_load);
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// Calling function with deprecated map
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assertEquals(186, migrate_and_load(old_b2));
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assertOptimized(migrate_and_load);
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// Triggering deopt
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assertEquals("abc", (migrate_and_load({a: 42, x : "abc"})));
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assertUnoptimized(migrate_and_load);
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