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 30var p = { f: function () { return "p"; } }; 31var o = Object.create(p); 32o.x = true; 33delete o.x; // slow case object 34 35var u = { x: 0, f: function () { return "u"; } }; // object with some other map 36 37function F(x) { 38 return x.f(); 39} 40 41// First make CALL IC in F go MEGAMORPHIC and ensure that we put the stub 42// that calls p.f (guarded by a negative dictionary lookup on the reciever) 43// into the stub cache 44assertEquals("p", F(o)); 45assertEquals("p", F(o)); 46assertEquals("u", F(u)); 47assertEquals("p", F(o)); 48assertEquals("u", F(u)); 49 50// Optimize F. We will inline p.f into F guarded by map checked against 51// receiver which does not work for slow case objects. 52%OptimizeFunctionOnNextCall(F); 53assertEquals("p", F(o)); 54 55// Add f to o. o's map will *not* change. 56o.f = function () { return "o"; }; 57assertEquals("o", F(o)); 58