1// Copyright 2010 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Flags: --allow-natives-syntax
29
30function GetX(o) { return o.x; }
31function CallF(o) { return o.f(); }
32function SetX(o) { o.x = 42; }
33function SetXY(o,y) { return o.x = y; }
34
35
36function Test(o) {
37  SetX(o);
38  assertEquals(42, GetX(o));
39  assertEquals(87, SetXY(o, 87));
40  assertEquals(87, GetX(o));
41  assertTrue(SetXY(o, o) === o);
42  assertTrue(o === GetX(o), "o === GetX(o)");
43  assertEquals("hest", SetXY(o, "hest"));
44  assertEquals("hest", GetX(o));
45  assertTrue(SetXY(o, Test) === Test);
46  assertTrue(Test === GetX(o), "Test === GetX(o)");
47  assertEquals(99, CallF(o));
48}
49
50// Create a bunch of objects with different layouts.
51var o1 = { x: 0, y: 1 };
52var o2 = { y: 1, x: 0 };
53var o3 = { y: 1, z: 2, x: 0 };
54o1.f = o2.f = o3.f = function() { return 99; }
55
56// Run the test until we're fairly sure we've optimized the
57// polymorphic property access.
58for (var i = 0; i < 5; i++) {
59  Test(o1);
60  Test(o2);
61  Test(o3);
62}
63%OptimizeFunctionOnNextCall(Test);
64Test(o1);
65Test(o2);
66Test(o3);
67
68// Make sure that the following doesn't crash.
69GetX(0);
70SetX(0);
71SetXY(0, 0);
72assertThrows("CallF(0)", TypeError);
73