1// Copyright 2013 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: --expose-gc --allow-natives-syntax
29
30function f() {
31  return 23;
32}
33
34function call(o) {
35  return o['']();
36}
37
38function test() {
39  var o1 = %ToFastProperties(Object.create({ foo:1 }, { '': { value:f }}));
40  var o2 = %ToFastProperties(Object.create({ bar:1 }, { '': { value:f }}));
41  var o3 = %ToFastProperties(Object.create({ baz:1 }, { '': { value:f }}));
42  var o4 = %ToFastProperties(Object.create({ qux:1 }, { '': { value:f }}));
43  var o5 = %ToFastProperties(Object.create({ loo:1 }, { '': { value:f }}));
44  // Called twice on o1 to turn monomorphic.
45  assertEquals(23, call(o1));
46  assertEquals(23, call(o1));
47  // Called on four other objects to turn megamorphic.
48  assertEquals(23, call(o2));
49  assertEquals(23, call(o3));
50  assertEquals(23, call(o4));
51  assertEquals(23, call(o5));
52  return o1;
53}
54
55// Fill stub cache with entries.
56test();
57
58// Clear stub cache during GC.
59gc();
60
61// Turn IC megamorphic again.
62var oboom = test();
63
64// Optimize with previously cleared stub cache.
65%OptimizeFunctionOnNextCall(call);
66assertEquals(23, call(oboom));
67