external-array.js revision 8b112d2025046f85ef7f6be087c6129c872ebad2
1// Copyright 2011 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28// Flags: --allow-natives-syntax 29 30// This is a regression test for overlapping key and value registers. 31function f(a) { 32 a[0] = 0; 33 a[1] = 0; 34} 35 36var a = new Int32Array(2); 37for (var i = 0; i < 5; i++) { 38 f(a); 39} 40%OptimizeFunctionOnNextCall(f); 41f(a); 42 43assertEquals(0, a[0]); 44assertEquals(0, a[1]); 45 46// Test the correct behavior of the |length| property (which is read-only). 47a = new Int32Array(42); 48assertEquals(42, a.length); 49a.length = 2; 50assertEquals(42, a.length); 51assertTrue(delete a.length); 52a.length = 2 53assertEquals(2, a.length); 54 55// Test the correct behavior of the |BYTES_PER_ELEMENT| property (which is 56// "constant", but not read-only). 57a = new Int32Array(2); 58assertEquals(4, a.BYTES_PER_ELEMENT); 59a.BYTES_PER_ELEMENT = 42; 60assertEquals(42, a.BYTES_PER_ELEMENT); 61a = new Uint8Array(2); 62assertEquals(1, a.BYTES_PER_ELEMENT); 63a = new Int16Array(2); 64assertEquals(2, a.BYTES_PER_ELEMENT); 65 66