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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 g1 = { a:1 } | 30 // This is a boiled-down example happening in the Epic Citadel demo: |
| 31 // After deopting, the multiplication for unary minus stayed in Smi |
| 32 // mode instead of going to double mode, leading to deopt loops. |
31 | 33 |
32 function load() { | 34 function unaryMinusTest(x) { |
33 return g1.a; | 35 var g = (1 << x) | 0; |
| 36 // Optimized code will contain a LMulI with -1 as right operand. |
| 37 return (g & -g) - 1 | 0; |
34 } | 38 } |
35 | 39 |
36 assertEquals(1, load()); | 40 unaryMinusTest(3); |
37 assertEquals(1, load()); | 41 unaryMinusTest(3); |
38 %OptimizeFunctionOnNextCall(load); | 42 %OptimizeFunctionOnNextCall(unaryMinusTest); |
39 assertEquals(1, load()); | 43 unaryMinusTest(3); |
40 delete g1.a; | 44 assertOptimized(unaryMinusTest); |
41 assertEquals(undefined, load()); | |
42 | 45 |
43 var g2 = { a:2 } | 46 // Deopt on kMinInt |
| 47 unaryMinusTest(31); |
| 48 // The following is normally true, but not with --stress-opt. :-/ |
| 49 // assertUnoptimized(unaryMinusTest); |
44 | 50 |
45 function load2() { | 51 // We should have learned something from the deopt. |
46 return g2.a; | 52 unaryMinusTest(31); |
47 } | 53 %OptimizeFunctionOnNextCall(unaryMinusTest); |
48 | 54 unaryMinusTest(31); |
49 assertEquals(2, load2()); | 55 assertOptimized(unaryMinusTest); |
50 assertEquals(2, load2()); | |
51 %OptimizeFunctionOnNextCall(load2); | |
52 assertEquals(2, load2()); | |
53 g2.b = 10; | |
54 g2.a = 5; | |
55 assertEquals(5, load2()); | |
56 | |
57 var g3 = { a:2, b:9, c:1 } | |
58 | |
59 function store(v) { | |
60 g3.a = v; | |
61 return g3.a; | |
62 } | |
63 | |
64 assertEquals(5, store(5)); | |
65 assertEquals(8, store(8)); | |
66 %OptimizeFunctionOnNextCall(store); | |
67 assertEquals(10, store(10)); | |
68 delete g3.c; | |
69 store(7); | |
70 assertEquals({a:7, b:9}, g3); | |
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