nodejs/deps/v8/test/mjsunit/turboshaft/maglev-frontend/dematerialized-duplicated-recursive.js

// 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_duplicated(n) {
  let o1 = { x : 42 };
  let o2 = { x : o1, y : o1, z : undefined };
  o2.z = o2;
  if (n < 0) {
    // We won't execute this code when collecting feedback, which means that
    // Maglev will do an unconditional deopt here (and {o1} and {o2} will thus
    // have no use besides the frame state for this deopt).
    n + 5;
    return [ o1, o2 ];
  }
  return n + 2;
}

%PrepareFunctionForOptimization(dematerialized_duplicated);
assertEquals(7, dematerialized_duplicated(5));
assertEquals(7, dematerialized_duplicated(5));

%OptimizeFunctionOnNextCall(dematerialized_duplicated);
assertEquals(7, dematerialized_duplicated(5));

let [o1, o2] = dematerialized_duplicated(-1);
assertSame(o1, o2.x);
assertSame(o1, o2.y);
assertSame(o2.x, o2.y);
assertSame(o2, o2.z);