mirror of
https://github.com/tc39/test262.git
synced 2025-11-03 21:24:30 +01:00
7298a38552
sourceRevisionAtLastExport: 33f2fb0e53d135f0ee17cfccd9d993eb2a6f47de targetRevisionAtLastExport: 31340cbd9add103f586d501b0c3354b7b182abc0
37 lines
939 B
JavaScript
37 lines
939 B
JavaScript
// Copyright 2016 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
|
|
|
|
function c4(w, h) {
|
|
var size = w * h;
|
|
if (size < 0) size = 0;
|
|
return new Uint32Array(size);
|
|
}
|
|
|
|
for (var i = 0; i < 3; i++) {
|
|
// Computing -0 as the result makes the "size = w * h" multiplication IC
|
|
// go into double mode.
|
|
c4(0, -1);
|
|
}
|
|
// Optimize Uint32ConstructFromLength.
|
|
for (var i = 0; i < 1000; i++) c4(2, 2);
|
|
|
|
// This array will have a HeapNumber as its length:
|
|
var bomb = c4(2, 2);
|
|
|
|
function reader(o, i) {
|
|
// Dummy try-catch, so that TurboFan is used to optimize this.
|
|
try {} catch(e) {}
|
|
return o[i];
|
|
}
|
|
// Optimize reader!
|
|
for (var i = 0; i < 3; i++) reader(bomb, 0);
|
|
%OptimizeFunctionOnNextCall(reader);
|
|
reader(bomb, 0);
|
|
|
|
for (var i = bomb.length; i < 100; i++) {
|
|
assertEquals(undefined, reader(bomb, i));
|
|
}
|