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1 // Copyright 2015 the V8 project authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 // Flags: --allow-natives-syntax --noalways-opt | |
6 | |
7 // We disable vector store ICs because slot indices change when this option | |
8 // is enabled. | |
9 | |
10 // Locations in the type feedback vector where call counts are maintained for | |
11 // the two calls made from bar(); | |
12 | |
13 (function() { | |
14 const kFooCallExtraIndex = 5; | |
15 const kArrayCallExtraIndex = 7; | |
16 | |
17 function GetCallCount(func, slot) { | |
18 var vector = %GetTypeFeedbackVector(func); | |
19 // Call counts are recorded doubled. | |
20 var value = %FixedArrayGet(vector, slot); | |
21 return Math.floor(value / 2); | |
22 } | |
23 | |
24 function foo(a) { return a[3] * 16; } | |
25 | |
26 function bar(a) { | |
27 var result = 0; | |
28 for (var i = 0; i < 10; i++) { | |
29 result = foo(a); | |
30 if (i % 2 === 0) { | |
31 var r = Array(); | |
32 r[0] = 1; | |
33 result += r[0]; | |
34 } | |
35 } | |
36 return result; | |
37 } | |
38 | |
39 var a = [1, 2, 3]; | |
40 bar(a); | |
41 assertEquals(10, GetCallCount(bar, kFooCallExtraIndex)); | |
42 assertEquals(5, GetCallCount(bar, kArrayCallExtraIndex)); | |
43 | |
44 %OptimizeFunctionOnNextCall(bar); | |
45 bar(a); | |
46 })(); | |
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