v8/test/mjsunit/strict-mode-opt.js

// Copyright 2011 the V8 project authors. All rights reserved.
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// Flags: --allow-natives-syntax

var global = 0;
var MAX = 5;

// Attempt to inline strcit in non-strict.

function strictToBeInlined(n) {
  "use strict";
  global = "strict";
  if (n == MAX) { undefined_variable_strict = "value"; }
}

function nonstrictCallStrict(n) {
  strictToBeInlined(n);
}
%PrepareFunctionForOptimization(nonstrictCallStrict);

(function testInlineStrictInNonStrict() {
  for (var i = 0; i <= MAX; i ++) {
    try {
      if (i == MAX - 1) %OptimizeFunctionOnNextCall(nonstrictCallStrict);
      nonstrictCallStrict(i);
    } catch (e) {
      assertInstanceof(e, ReferenceError);
      assertEquals(MAX, i);
      return;
    }
  }
  fail("ReferenceError after MAX iterations", "no exception");
})();

// Attempt to inline non-strict in strict.

function nonstrictToBeInlined(n) {
  global = "nonstrict";
  if (n == MAX) { undefined_variable_nonstrict = "The nonstrict value"; }
}

function strictCallNonStrict(n) {
  "use strict";
  nonstrictToBeInlined(n);
}
%PrepareFunctionForOptimization(strictCallNonStrict);

(function testInlineNonStrictInStrict() {
  for (var i = 0; i <= MAX; i ++) {
    try {
      if (i == MAX - 1) %OptimizeFunctionOnNextCall(strictCallNonStrict);
      strictCallNonStrict(i);
    } catch (e) {
      fail("no exception", "exception");
    }
  }
  assertEquals("The nonstrict value", undefined_variable_nonstrict);
})();

// Optimize strict function.

function strictAssignToUndefined(n) {
  "use strict";
  global = "strict";
  if (n == MAX) { undefined_variable_strict_2 = "value"; }
}
%PrepareFunctionForOptimization(nonstrictCallStrict);

(function testOptimizeStrictAssignToUndefined() {
  for (var i = 0; i <= MAX; i ++) {
    try {
      if (i == MAX - 1) %OptimizeFunctionOnNextCall(nonstrictCallStrict);
      strictAssignToUndefined(i);
    } catch (e) {
      assertInstanceof(e, ReferenceError);
      assertEquals(MAX, i);
      return;
    }
  }
  fail("ReferenceError after MAX iterations", "no exception");
})();