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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 // Test usage of static type information for loads that would otherwise | 30 var X = 1.1; |
31 // turn into polymorphic or generic loads. | 31 var K = 0.5; |
32 | 32 |
33 // Prepare a highly polymorphic load to be used by all tests. | 33 var O = 0; |
34 Object.prototype.load = function() { return this.property; }; | 34 var result = new Float64Array(2); |
35 Object.prototype.load.call({ A:0, property:10 }); | |
36 Object.prototype.load.call({ A:0, B:0, property:11 }); | |
37 Object.prototype.load.call({ A:0, B:0, C:0, property:12 }); | |
38 Object.prototype.load.call({ A:0, B:0, C:0, D:0, property:13 }); | |
39 Object.prototype.load.call({ A:0, B:0, C:0, D:0, E:0, property:14 }); | |
40 Object.prototype.load.call({ A:0, B:0, C:0, D:0, E:0, F:0, property:15 }); | |
41 | 35 |
42 // Test for object literals. | 36 function spill() { |
43 (function() { | 37 try { } catch (e) { } |
44 function f(x) { | 38 } |
45 var object = { property:x }; | 39 |
46 return object.load(); | 40 function buggy() { |
| 41 var v = X; |
| 42 var phi1 = v + K; |
| 43 var phi2 = v - K; |
| 44 |
| 45 spill(); // At this point initial values for phi1 and phi2 are spilled. |
| 46 |
| 47 var xmm1 = v; |
| 48 var xmm2 = v*v*v; |
| 49 var xmm3 = v*v*v*v; |
| 50 var xmm4 = v*v*v*v*v; |
| 51 var xmm5 = v*v*v*v*v*v; |
| 52 var xmm6 = v*v*v*v*v*v*v; |
| 53 var xmm7 = v*v*v*v*v*v*v*v; |
| 54 var xmm8 = v*v*v*v*v*v*v*v*v; |
| 55 |
| 56 // All registers are blocked and phis for phi1 and phi2 are spilled because |
| 57 // their left (incoming) value is spilled, there are no free registers, |
| 58 // and phis themselves have only ANY-policy uses. |
| 59 |
| 60 for (var x = 0; x < 2; x++) { |
| 61 xmm1 += xmm1 * xmm6; |
| 62 xmm2 += xmm1 * xmm5; |
| 63 xmm3 += xmm1 * xmm4; |
| 64 xmm4 += xmm1 * xmm3; |
| 65 xmm5 += xmm1 * xmm2; |
| 66 |
| 67 // Now swap values of phi1 and phi2 to create cycle between phis. |
| 68 var t = phi1; |
| 69 phi1 = phi2; |
| 70 phi2 = t; |
47 } | 71 } |
48 | 72 |
49 assertSame(1, f(1)); | 73 // Now we want to get values of phi1 and phi2. However we would like to |
50 assertSame(2, f(2)); | 74 // do it in a way that does not produce any uses of phi1&phi2 that have |
51 %OptimizeFunctionOnNextCall(f); | 75 // a register beneficial policy. How? We just hide these uses behind phis. |
52 assertSame(3, f(3)); | 76 result[0] = (O === 0) ? phi1 : phi2; |
53 })(); | 77 result[1] = (O !== 0) ? phi1 : phi2; |
| 78 } |
54 | 79 |
55 // Test for inlined constructors. | 80 function test() { |
56 (function() { | 81 buggy(); |
57 function c(x) { | 82 assertArrayEquals([X + K, X - K], result); |
58 this.property = x; | 83 } |
59 } | |
60 function f(x) { | |
61 var object = new c(x); | |
62 return object.load(); | |
63 } | |
64 | 84 |
65 assertSame(1, f(1)); | 85 test(); |
66 assertSame(2, f(2)); | 86 test(); |
67 %OptimizeFunctionOnNextCall(f); | 87 %OptimizeFunctionOnNextCall(buggy); |
68 assertSame(3, f(3)); | 88 test(); |
69 })(); | |
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