37 lines
939 B
JavaScript
37 lines
939 B
JavaScript
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// Copyright 2016 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
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function c4(w, h) {
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var size = w * h;
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if (size < 0) size = 0;
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return new Uint32Array(size);
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}
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for (var i = 0; i < 3; i++) {
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// Computing -0 as the result makes the "size = w * h" multiplication IC
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// go into double mode.
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c4(0, -1);
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}
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// Optimize Uint32ConstructFromLength.
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for (var i = 0; i < 1000; i++) c4(2, 2);
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// This array will have a HeapNumber as its length:
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var bomb = c4(2, 2);
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function reader(o, i) {
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// Dummy try-catch, so that TurboFan is used to optimize this.
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try {} catch(e) {}
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return o[i];
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}
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// Optimize reader!
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for (var i = 0; i < 3; i++) reader(bomb, 0);
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%OptimizeFunctionOnNextCall(reader);
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reader(bomb, 0);
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for (var i = bomb.length; i < 100; i++) {
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assertEquals(undefined, reader(bomb, i));
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}
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