// Copyright 2014 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 f(a, b, c) { this.a = a; this.b = b; this.c = c; } var o3 = new f(1, 2, 3.5); var o4 = new f(1, 2.5, 3); var o1 = new f(1.5, 2, 3); var o2 = new f(1.5, 2, 3); function migrate(o) { return o.a; } // Use migrate to stabilize o1, o2 and o4 in [double, double, smi]. migrate(o4); migrate(o1); migrate(o2); function store_transition(o) { o.d = 1; } // Optimize "store_transition" to transition from [double, double, smi] to // [double, double, smi, smi]. This adds a dependency on the // [double, double, smi] map. ; %PrepareFunctionForOptimization(store_transition); store_transition(o4); store_transition(o1); store_transition(o2); %OptimizeFunctionOnNextCall(store_transition); // Pass in a deprecated object of format [smi, smi, double]. This will migrate // the instance, forcing a merge with [double, double, smi], ending up with // [double, double, double], which deprecates [double, double, smi] and // deoptimizes all dependencies of [double, double, smi], including // store_transition itself. store_transition(o3);