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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
11 // with the distribution. | 11 // with the distribution. |
12 // * Neither the name of Google Inc. nor the names of its | 12 // * Neither the name of Google Inc. nor the names of its |
13 // contributors may be used to endorse or promote products derived | 13 // contributors may be used to endorse or promote products derived |
14 // from this software without specific prior written permission. | 14 // from this software without specific prior written permission. |
15 // | 15 // |
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 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. | 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | 27 |
28 // Flags: --allow-natives-syntax | 28 // Flags: --allow-natives-syntax |
29 | 29 |
30 function load(a, i) { | 30 function f(a, b, c) { |
31 return a[i]; | 31 this.a = a; |
| 32 this.b = b; |
| 33 this.c = c; |
32 } | 34 } |
33 load([1, 2, 3], "length"); | 35 var o3 = new f(1, 2, 3.5); |
34 load(3); | 36 var o4 = new f(1, 2.5, 3); |
35 load([1, 2, 3], 3); | 37 var o1 = new f(1.5, 2, 3); |
36 load(0, 0); | 38 var o2 = new f(1.5, 2, 3); |
37 %OptimizeFunctionOnNextCall(load); | 39 function migrate(o) { |
38 assertEquals(2, load([1, 2, 3], 1)); | 40 return o.a; |
39 assertEquals(undefined, load(0, 0)); | |
40 | |
41 function store(a, i, x) { | |
42 a[i] = x; | |
43 } | 41 } |
44 store([1, 2, 3], "length", 3); | 42 // Use migrate to stabilize o1, o2 and o4 in [double, double, smi]. |
45 store(3); | 43 migrate(o4); |
46 store([1, 2, 3], 3, 3); | 44 migrate(o1); |
47 store(0, 0, 1); | 45 migrate(o2); |
48 %OptimizeFunctionOnNextCall(store); | 46 function store_transition(o) { |
49 var a = [1, 2, 3]; | 47 o.d = 1; |
50 store(a, 1, 1); | 48 } |
51 assertEquals(1, a[1]); | 49 // Optimize "store_transition" to transition from [double, double, smi] to |
52 store(0, 0, 1); | 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); |
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