polymorphic-symbols.js 1.21 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
// Copyright 2015 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() {
  const symbol = Symbol('symbol');
  const OBJS = [
    {[symbol]: 0, a: 1},
    {[symbol]: 1, b: 2},
    {[symbol]: 2, c: 3},
    {[symbol]: 3, d: 4}
  ];
  function foo(o) { return o[symbol]; }
16
  %PrepareFunctionForOptimization(foo);
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
  for (let i = 0; i < OBJS.length; ++i) {
    assertEquals(i, foo(OBJS[i]));
    assertEquals(i, foo(OBJS[i]));
  }
  %OptimizeFunctionOnNextCall(foo);
  for (let i = 0; i < OBJS.length; ++i) {
    assertEquals(i, foo(OBJS[i]));
    assertEquals(i, foo(OBJS[i]));
  }
})();

(function() {
  const symbol = Symbol('symbol');
  const OBJS = [
    {[symbol]: 0, a: 1},
    {[symbol]: 1, b: 2},
    {[symbol]: 2, c: 3},
    {[symbol]: 3, d: 4}
  ];
  function foo(o) { o[symbol] = o; }
37
  %PrepareFunctionForOptimization(foo);
38 39 40 41 42 43 44 45 46 47 48 49 50
  for (let i = 0; i < OBJS.length; ++i) {
    foo(OBJS[i]);
    foo(OBJS[i]);
  }
  %OptimizeFunctionOnNextCall(foo);
  for (let i = 0; i < OBJS.length; ++i) {
    foo(OBJS[i]);
    foo(OBJS[i]);
  }
  for (const o of OBJS) {
    assertEquals(o, o[symbol]);
  }
})();