| // Copyright 2018 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 |
| |
| function foo(a) { |
| a = "" + Math.abs(a); |
| return a.charCodeAt(0); |
| } |
| |
| // Add '1' to the number to string table (as SeqString). |
| %PrepareFunctionForOptimization(foo); |
| String.fromCharCode(49); |
| // Turn the SeqString into a ThinString via forced internalization. |
| const o = {}; |
| o[1..toString()] = 1; |
| |
| assertEquals(49, foo(1)); |
| assertEquals(49, foo(1)); |
| %OptimizeFunctionOnNextCall(foo); |
| assertEquals(49, foo(1)); |
