1// Copyright 2014 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 f(a, b, c) { 31 this.a = a; 32 this.b = b; 33 this.c = c; 34} 35var o3 = new f(1, 2, 3.5); 36var o4 = new f(1, 2.5, 3); 37var o1 = new f(1.5, 2, 3); 38var o2 = new f(1.5, 2, 3); 39function migrate(o) { 40 return o.a; 41} 42// Use migrate to stabilize o1, o2 and o4 in [double, double, smi]. 43migrate(o4); 44migrate(o1); 45migrate(o2); 46function store_transition(o) { 47 o.d = 1; 48} 49// Optimize "store_transition" to transition from [double, double, smi] to 50// [double, double, smi, smi]. This adds a dependency on the 51// [double, double, smi] map. 52store_transition(o4); 53store_transition(o1); 54store_transition(o2); 55%OptimizeFunctionOnNextCall(store_transition); 56// Pass in a deprecated object of format [smi, smi, double]. This will migrate 57// the instance, forcing a merge with [double, double, smi], ending up with 58// [double, double, double], which deprecates [double, double, smi] and 59// deoptimizes all dependencies of [double, double, smi], including 60// store_transition itself. 61store_transition(o3); 62