| // 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 --noalways-opt |
| |
| // We disable vector store ICs because slot indices change when this option |
| // is enabled. |
| |
| // Locations in the type feedback vector where call counts are maintained for |
| // the two calls made from bar(); |
| |
| (function() { |
| const kFooCallExtraIndex = 5; |
| const kArrayCallExtraIndex = 7; |
| |
| function GetCallCount(func, slot) { |
| var vector = %GetTypeFeedbackVector(func); |
| // Call counts are recorded doubled. |
| var value = %FixedArrayGet(vector, slot); |
| return Math.floor(value / 2); |
| } |
| |
| function foo(a) { return a[3] * 16; } |
| |
| function bar(a) { |
| var result = 0; |
| for (var i = 0; i < 10; i++) { |
| result = foo(a); |
| if (i % 2 === 0) { |
| var r = Array(); |
| r[0] = 1; |
| result += r[0]; |
| } |
| } |
| return result; |
| } |
| |
| var a = [1, 2, 3]; |
| bar(a); |
| assertEquals(10, GetCallCount(bar, kFooCallExtraIndex)); |
| assertEquals(5, GetCallCount(bar, kArrayCallExtraIndex)); |
| |
| %OptimizeFunctionOnNextCall(bar); |
| bar(a); |
| })(); |