// 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 // Flags: --no-always-turbofan function ret_from_holey_arr(i) { let arr = new Array(10); arr[0] = 42; return arr[i]; } %PrepareFunctionForOptimization(ret_from_holey_arr); assertEquals(42, ret_from_holey_arr(0)); %OptimizeFunctionOnNextCall(ret_from_holey_arr); assertEquals(42, ret_from_holey_arr(0)); assertOptimized(ret_from_holey_arr); // Triggering deopt by trying to return a hole. assertEquals(undefined, ret_from_holey_arr(1)); assertUnoptimized(ret_from_holey_arr); // Reopting %OptimizeFunctionOnNextCall(ret_from_holey_arr); assertEquals(undefined, ret_from_holey_arr(1)); // This time the hole is converted to undefined without deopting. assertOptimized(ret_from_holey_arr);