text: // Copyright 2015 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 --harmony-do-expressions
  
  function f(x) {
    switch (x) {
      case 1: return "one";
      case 2: return "two";
      case do { for (var i = 0; i < 10; i++) { if (i == 5) %OptimizeOsr(); } }:
      case 3: return "WAT";
    }
  }
  
  assertEquals("one", f(1));
  assertEquals("two", f(2));
  assertEquals("WAT", f(3));
  