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Edit File: pic.js
// Copyright 2010 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // Flags: --allow-natives-syntax function GetX(o) { return o.x; } function CallF(o) { return o.f(); } function SetX(o) { o.x = 42; } function SetXY(o,y) { return o.x = y; } function Test(o) { SetX(o); assertEquals(42, GetX(o)); assertEquals(87, SetXY(o, 87)); assertEquals(87, GetX(o)); assertTrue(SetXY(o, o) === o); assertTrue(o === GetX(o), "o === GetX(o)"); assertEquals("hest", SetXY(o, "hest")); assertEquals("hest", GetX(o)); assertTrue(SetXY(o, Test) === Test); assertTrue(Test === GetX(o), "Test === GetX(o)"); assertEquals(99, CallF(o)); } // Create a bunch of objects with different layouts. var o1 = { x: 0, y: 1 }; var o2 = { y: 1, x: 0 }; var o3 = { y: 1, z: 2, x: 0 }; o1.f = o2.f = o3.f = function() { return 99; } // Run the test until we're fairly sure we've optimized the // polymorphic property access. for (var i = 0; i < 5; i++) { Test(o1); Test(o2); Test(o3); } %OptimizeFunctionOnNextCall(Test); Test(o1); Test(o2); Test(o3); // Make sure that the following doesn't crash. GetX(0); SetX(0); SetXY(0, 0); assertThrows("CallF(0)", TypeError);