v8/test/mjsunit/regress/regress-crbug-687029.js

// Copyright 2017 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(x) {
  x = Math.clz32(x);
  return "a".indexOf("a", x);
};
%PrepareFunctionForOptimization(foo);
foo(1);
foo(1);
%OptimizeFunctionOnNextCall(foo);
foo();