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Kmake/deps/v8/test/mjsunit/turboshaft/maglev-frontend/dematerialized-nested-objects.js
2026-05-26 23:36:42 -07:00

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JavaScript

// Copyright 2024 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 --turbolev --turbofan
function dematerialized_nested_object(n) {
let o = { a : 42, b : { c : 3.75 , d : [ 4 ] } };
if (n < 0) {
// We won't execute this code when collecting feedback, which means that
// Maglev will do an unconditional deopt here (and {o} will thus have no use
// besides the frame state for this deopt).
n + 5;
return o;
}
return n + 2;
}
%PrepareFunctionForOptimization(dematerialized_nested_object);
assertEquals(7, dematerialized_nested_object(5));
assertEquals(7, dematerialized_nested_object(5));
%OptimizeFunctionOnNextCall(dematerialized_nested_object);
assertEquals(7, dematerialized_nested_object(5));
assertEquals({ a : 42, b : { c : 3.75 , d : [ 4 ] } },
dematerialized_nested_object(-1));