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// Copyright 2020 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
const xs = [1,2,3,4,5,6,7,8,9];
let deopt = false;
function g(acc, x, i) {
if (deopt) {
assertFalse(%IsBeingInterpreted());
Array.prototype.x = 42; // Trigger a lazy deopt.
deopt = false;
}
return acc + x;
}
function f() {
return xs.reduceRight(g, 0);
}
%PrepareFunctionForOptimization(f);
%PrepareFunctionForOptimization(g);
assertEquals(45, f());
assertEquals(45, f());
%OptimizeFunctionOnNextCall(f);
deopt = true;
assertEquals(45, f());
assertEquals(45, f());
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