| // Copyright 2019 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: --opt |
| |
| Debug = debug.Debug |
| |
| const evaluate = Debug.evaluateGlobalREPL; |
| const evaluateNonREPL = (source) => Debug.evaluateGlobal(source, false).value(); |
| |
| // Test that a let declared variable 'x' bound by an optimized function is |
| // updated properly. |
| evaluate('let x = 42;'); |
| |
| evaluate('function foo() { return x; }'); |
| |
| %PrepareFunctionForOptimization(foo); |
| foo(); |
| foo(); |
| %OptimizeFunctionOnNextCall(foo); |
| assertEquals(42, foo()); |
| assertOptimized(foo); |
| |
| evaluate('let x = 21'); |
| assertEquals(21, foo()); |
| |
| // Test that we do not throw a 'use before declaration error' and |
| // that the optimized code does not load the hole from the wrong |
| // script context. |
| evaluate('x; let x;'); |
| assertEquals(undefined, foo()); |
