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 p = { f: function () { return "p"; } }; 31 var o = Object.create(p); 32 o.x = true; 33 delete o.x; // slow case object 34 35 var u = { x: 0, f: function () { return "u"; } }; // object with some other map 36 37 function 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 44 assertEquals("p", F(o)); 45 assertEquals("p", F(o)); 46 assertEquals("u", F(u)); 47 assertEquals("p", F(o)); 48 assertEquals("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); 53 assertEquals("p", F(o)); 54 55 // Add f to o. o's map will *not* change. 56 o.f = function () { return "o"; }; 57 assertEquals("o", F(o)); 58
