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 30 function GetX(o) { return o.x; } 31 function CallF(o) { return o.f(); } 32 function SetX(o) { o.x = 42; } 33 function SetXY(o,y) { return o.x = y; } 34 35 36 function 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. 51 var o1 = { x: 0, y: 1 }; 52 var o2 = { y: 1, x: 0 }; 53 var o3 = { y: 1, z: 2, x: 0 }; 54 o1.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. 58 for (var i = 0; i < 5; i++) { 59 Test(o1); 60 Test(o2); 61 Test(o3); 62 } 63 %OptimizeFunctionOnNextCall(Test); 64 Test(o1); 65 Test(o2); 66 Test(o3); 67 68 // Make sure that the following doesn't crash. 69 GetX(0); 70 SetX(0); 71 SetXY(0, 0); 72 assertThrows("CallF(0)", TypeError); 73
