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 })(); 47
