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>
40 lines
1.1 KiB
JavaScript
40 lines
1.1 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 = 42; return 42; }
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%NeverOptimizeFunction(A);
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function create(c) {
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let x = { "a" : 42, c }; // Creating an object before the Construct call so
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// that the frame state has more interesting data.
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let y = new A(c);
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return [x, y];
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}
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%PrepareFunctionForOptimization(create);
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create();
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let o1 = create();
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%OptimizeFunctionOnNextCall(create);
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let o2 = create();
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assertEquals(o1, o2);
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assertOptimized(create);
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// Triggering deopt (before the construction) by changing the target.
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let new_A_called = false;
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A = function() { new_A_called = true; }
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assertUnoptimized(create);
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%DeoptimizeFunction(create);
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let o3 = create();
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assertTrue(new_A_called);
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// Falling back to generic Construct call.
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%OptimizeFunctionOnNextCall(create);
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let o4 = create();
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assertEquals(o3, o4);
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assertOptimized(create);
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