regress-4788-2.js 515 Bytes
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// Copyright 2016 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

var f = (function() {
  "use asm";
  function foo(x) {
    return x < x;
  }
  return foo;
})();

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%PrepareFunctionForOptimization(f);

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function deopt(f) {
  return {
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    toString: function() {
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      %DeoptimizeFunction(f);
      return "2";
    }
  };
}

%OptimizeFunctionOnNextCall(f);
assertFalse(f(deopt(f)));