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>
33 lines
779 B
JavaScript
33 lines
779 B
JavaScript
// Copyright 2020 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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//
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// Flags: --turbo-dynamic-map-checks --allow-natives-syntax --turbofan --no-always-turbofan
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function f(v) {
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return v.b;
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}
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var v = { a: 10, b: 10.23 };
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%PrepareFunctionForOptimization(f);
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f(v);
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%OptimizeFunctionOnNextCall(f);
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f(v);
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assertOptimized(f);
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v.b = {x: 20};
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// Must deoptimize because of field-rep changes for field 'b'
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assertUnoptimized(f);
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assertEquals(f(v).x, 20);
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function f0(v) {
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return v.b;
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}
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var v0 = { b: 10.23 };
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%PrepareFunctionForOptimization(f0);
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f0(v0);
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// Transition the field to an Smi field.
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v0.b = {};
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v0.b = 0;
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%OptimizeFunctionOnNextCall(f0);
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f0(v0);
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assertEquals(f0(v0), 0);
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