1 // Copyright 2013 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 var bytes = new Uint8Array([ 31 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f]); // kHoleNaN 32 var doubles = new Float64Array(bytes.buffer); 33 assertTrue(isNaN(doubles[0])); 34 35 var prototype = [2.5, 2.5]; 36 var array = [3.5, 3.5]; 37 array.__proto__ = prototype; 38 assertTrue(%HasFastDoubleElements(array)); 39 40 function boom(index) { 41 array[index] = doubles[0]; 42 return array[index]; 43 } 44 45 assertTrue(isNaN(boom(0))); 46 assertTrue(isNaN(boom(0))); 47 assertTrue(isNaN(boom(0))); 48 49 // Test hydrogen 50 %OptimizeFunctionOnNextCall(boom); 51 assertTrue(isNaN(boom(0))); 52 assertTrue(isNaN(boom(0))); 53 assertTrue(isNaN(boom(0))); 54
