v8/test/mjsunit/compiler/escape-analysis-2.js

// Copyright 2015 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
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// Flags: --allow-natives-syntax --turbo-escape

function f(a) {
  "use strict";
  if (arguments === a)
    return 1;
  return arguments.length;
}

function g(a) {
  return f(a,1,2,3);
}

%PrepareFunctionForOptimization(g);
assertEquals(4, g());
assertEquals(4, g());
%OptimizeFunctionOnNextCall(g);
assertEquals(4, g());