41 lines
1019 B
JavaScript
41 lines
1019 B
JavaScript
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// Copyright 2015 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax --noalways-opt
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// Locations in the type feedback vector where call counts are maintained for
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// the two calls made from bar();
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const kFooCallExtraIndex = 5;
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const kArrayCallExtraIndex = 9;
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function GetCallCount(func, slot) {
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var vector = %GetTypeFeedbackVector(func);
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// Call counts are recorded doubled.
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var value = %FixedArrayGet(vector, slot);
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return Math.floor(value / 2);
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}
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function foo(a) { return a[3] * 16; }
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function bar(a) {
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var result = 0;
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for (var i = 0; i < 10; i++) {
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result = foo(a);
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if (i % 2 === 0) {
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var r = Array();
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r[0] = 1;
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result += r[0];
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}
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}
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return result;
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}
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var a = [1, 2, 3];
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bar(a);
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assertEquals(10, GetCallCount(bar, kFooCallExtraIndex));
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assertEquals(5, GetCallCount(bar, kArrayCallExtraIndex));
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%OptimizeFunctionOnNextCall(bar);
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bar(a);
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