Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 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 | |
| 30 | function f(a, b, c) { |
| 31 | this.a = a; |
| 32 | this.b = b; |
| 33 | this.c = c; |
| 34 | } |
| 35 | var o3 = new f(1, 2, 3.5); |
| 36 | var o4 = new f(1, 2.5, 3); |
| 37 | var o1 = new f(1.5, 2, 3); |
| 38 | var o2 = new f(1.5, 2, 3); |
| 39 | function migrate(o) { |
| 40 | return o.a; |
| 41 | } |
| 42 | // Use migrate to stabilize o1, o2 and o4 in [double, double, smi]. |
| 43 | migrate(o4); |
| 44 | migrate(o1); |
| 45 | migrate(o2); |
| 46 | function 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. |
| 52 | store_transition(o4); |
| 53 | store_transition(o1); |
| 54 | store_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. |
| 61 | store_transition(o3); |