OLD | NEW |
1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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 var bytes = new Uint8Array([ | 30 var p = { f: function () { return "p"; } }; |
31 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f]); // kHoleNaN | 31 var o = Object.create(p); |
32 var doubles = new Float64Array(bytes.buffer); | 32 o.x = true; |
33 assertTrue(isNaN(doubles[0])); | 33 delete o.x; // slow case object |
34 | 34 |
35 var prototype = [2.5, 2.5]; | 35 var u = { x: 0, f: function () { return "u"; } }; // object with some other map |
36 var array = [3.5, 3.5]; | |
37 array.__proto__ = prototype; | |
38 assertTrue(%HasFastDoubleElements(array)); | |
39 | 36 |
40 function boom(index) { | 37 function F(x) { |
41 array[index] = doubles[0]; | 38 return x.f(); |
42 return array[index]; | |
43 } | 39 } |
44 | 40 |
45 assertTrue(isNaN(boom(0))); | 41 // First make CALL IC in F go MEGAMORPHIC and ensure that we put the stub |
46 assertTrue(isNaN(boom(0))); | 42 // that calls p.f (guarded by a negative dictionary lookup on the reciever) |
47 assertTrue(isNaN(boom(0))); | 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)); |
48 | 49 |
49 // Test hydrogen | 50 // Optimize F. We will inline p.f into F guarded by map checked against |
50 %OptimizeFunctionOnNextCall(boom); | 51 // receiver which does not work for slow case objects. |
51 assertTrue(isNaN(boom(0))); | 52 %OptimizeFunctionOnNextCall(F); |
52 assertTrue(isNaN(boom(0))); | 53 assertEquals("p", F(o)); |
53 assertTrue(isNaN(boom(0))); | |
54 | 54 |
55 | 55 // Add f to o. o's map will *not* change. |
56 | 56 o.f = function () { return "o"; }; |
| 57 assertEquals("o", F(o)); |
OLD | NEW |