v8/test/mjsunit/compiler/eval-introduced-closure.js

// Copyright 2011 the V8 project authors. All rights reserved.
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// Test that functions introduced by eval work both when there are
// strict mode and non-strict mode eval in scopes.

// Flags: --allow-natives-syntax

var x = 27;

function f() { return x; }

assertEquals(27, f());

function do_eval(str) {
  "use strict";
  return eval(str);
}

var eval_f = do_eval('(' + f + ')');
%PrepareFunctionForOptimization(eval_f);
for (var i = 0; i < 5; i++) assertEquals(27, eval_f());
%OptimizeFunctionOnNextCall(eval_f);
assertEquals(27, eval_f());

function do_eval_local(str) {
  "use strict";
  var x = 42;
  return eval(str);
}

eval_f = do_eval_local('(' + f + ')');
%PrepareFunctionForOptimization(eval_f);
for (var i = 0; i < 5; i++) assertEquals(42, eval_f());
%OptimizeFunctionOnNextCall(eval_f);
assertEquals(42, eval_f());

function do_eval_with_other_eval_call(str) {
  "use strict";
  var f = eval(str);
  eval('var x = 1');
  return f;
}

eval_f = do_eval_with_other_eval_call('(' + f + ')');
%PrepareFunctionForOptimization(eval_f);
for (var i = 0; i < 5; i++) assertEquals(27, eval_f());
%OptimizeFunctionOnNextCall(eval_f);
assertEquals(27, eval_f());

function test_non_strict_outer_eval() {
  function strict_eval(str) { "use strict"; return eval(str); }
  var eval_f = strict_eval('(' + f + ')');
  %PrepareFunctionForOptimization(eval_f);
  for (var i = 0; i < 5; i++) assertEquals(27, eval_f());
  %OptimizeFunctionOnNextCall(eval_f);
  assertEquals(27, eval_f());
  eval("var x = 3");
  assertEquals(3, eval_f());
}

test_non_strict_outer_eval();

function test_strict_outer_eval() {
  "use strict";
  function strict_eval(str) { "use strict"; return eval(str); }
  var eval_f = strict_eval('(' + f + ')');
  %PrepareFunctionForOptimization(eval_f);
  for (var i = 0; i < 5; i++) assertEquals(27, eval_f());
  %OptimizeFunctionOnNextCall(eval_f);
  assertEquals(27, eval_f());
  eval("var x = 3");
  assertEquals(27, eval_f());
}

test_non_strict_outer_eval();