1// Copyright 2010 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 30function GetX(o) { return o.x; } 31function CallF(o) { return o.f(); } 32function SetX(o) { o.x = 42; } 33function SetXY(o,y) { return o.x = y; } 34 35 36function Test(o) { 37 SetX(o); 38 assertEquals(42, GetX(o)); 39 assertEquals(87, SetXY(o, 87)); 40 assertEquals(87, GetX(o)); 41 assertTrue(SetXY(o, o) === o); 42 assertTrue(o === GetX(o), "o === GetX(o)"); 43 assertEquals("hest", SetXY(o, "hest")); 44 assertEquals("hest", GetX(o)); 45 assertTrue(SetXY(o, Test) === Test); 46 assertTrue(Test === GetX(o), "Test === GetX(o)"); 47 assertEquals(99, CallF(o)); 48} 49 50// Create a bunch of objects with different layouts. 51var o1 = { x: 0, y: 1 }; 52var o2 = { y: 1, x: 0 }; 53var o3 = { y: 1, z: 2, x: 0 }; 54o1.f = o2.f = o3.f = function() { return 99; } 55 56// Run the test until we're fairly sure we've optimized the 57// polymorphic property access. 58for (var i = 0; i < 5; i++) { 59 Test(o1); 60 Test(o2); 61 Test(o3); 62} 63%OptimizeFunctionOnNextCall(Test); 64Test(o1); 65Test(o2); 66Test(o3); 67 68// Make sure that the following doesn't crash. 69GetX(0); 70SetX(0); 71SetXY(0, 0); 72assertThrows("CallF(0)", TypeError); 73