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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 --smi-only-arrays --expose-gc | 28 // Flags: --allow-natives-syntax --expose-gc |
29 // Flags: --noalways-opt | 29 // Flags: --noalways-opt |
30 | 30 |
31 // Test element kind of objects. | |
32 // Since --smi-only-arrays affects builtins, its default setting at compile | |
33 // time sticks if built with snapshot. If --smi-only-arrays is deactivated | |
34 // by default, only a no-snapshot build actually has smi-only arrays enabled | |
35 // in this test case. Depending on whether smi-only arrays are actually | |
36 // enabled, this test takes the appropriate code path to check smi-only arrays. | |
37 | |
38 // support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8)); | |
39 support_smi_only_arrays = true; | |
40 | |
41 if (support_smi_only_arrays) { | |
42 print("Tests include smi-only arrays."); | |
43 } else { | |
44 print("Tests do NOT include smi-only arrays."); | |
45 } | |
46 | |
47 var elements_kind = { | 31 var elements_kind = { |
48 fast_smi_only : 'fast smi only elements', | 32 fast_smi_only : 'fast smi only elements', |
49 fast : 'fast elements', | 33 fast : 'fast elements', |
50 fast_double : 'fast double elements', | 34 fast_double : 'fast double elements', |
51 dictionary : 'dictionary elements', | 35 dictionary : 'dictionary elements', |
52 external_byte : 'external byte elements', | 36 external_byte : 'external byte elements', |
53 external_unsigned_byte : 'external unsigned byte elements', | 37 external_unsigned_byte : 'external unsigned byte elements', |
54 external_short : 'external short elements', | 38 external_short : 'external short elements', |
55 external_unsigned_short : 'external unsigned short elements', | 39 external_unsigned_short : 'external unsigned short elements', |
56 external_int : 'external int elements', | 40 external_int : 'external int elements', |
57 external_unsigned_int : 'external unsigned int elements', | 41 external_unsigned_int : 'external unsigned int elements', |
58 external_float : 'external float elements', | 42 external_float : 'external float elements', |
59 external_double : 'external double elements', | 43 external_double : 'external double elements', |
60 external_pixel : 'external pixel elements' | 44 external_pixel : 'external pixel elements' |
61 } | 45 } |
62 | 46 |
63 function getKind(obj) { | 47 function getKind(obj) { |
64 if (%HasFastSmiElements(obj)) return elements_kind.fast_smi_only; | 48 if (%HasFastSmiElements(obj)) return elements_kind.fast_smi_only; |
65 if (%HasFastObjectElements(obj)) return elements_kind.fast; | 49 if (%HasFastObjectElements(obj)) return elements_kind.fast; |
66 if (%HasFastDoubleElements(obj)) return elements_kind.fast_double; | 50 if (%HasFastDoubleElements(obj)) return elements_kind.fast_double; |
67 if (%HasDictionaryElements(obj)) return elements_kind.dictionary; | 51 if (%HasDictionaryElements(obj)) return elements_kind.dictionary; |
68 } | 52 } |
69 | 53 |
70 function isHoley(obj) { | 54 function isHoley(obj) { |
71 if (%HasFastHoleyElements(obj)) return true; | 55 if (%HasFastHoleyElements(obj)) return true; |
72 return false; | 56 return false; |
73 } | 57 } |
74 | 58 |
75 function assertKind(expected, obj, name_opt) { | 59 function assertKind(expected, obj, name_opt) { |
76 if (!support_smi_only_arrays && | |
77 expected == elements_kind.fast_smi_only) { | |
78 expected = elements_kind.fast; | |
79 } | |
80 assertEquals(expected, getKind(obj), name_opt); | 60 assertEquals(expected, getKind(obj), name_opt); |
81 } | 61 } |
82 | 62 |
83 if (support_smi_only_arrays) { | 63 function get_literal(x) { |
| 64 var literal = [1, 2, x]; |
| 65 return literal; |
| 66 } |
84 | 67 |
85 function get_literal(x) { | 68 get_literal(3); |
86 var literal = [1, 2, x]; | 69 // It's important to store a from before we crankshaft get_literal, because |
87 return literal; | 70 // mementos won't be created from crankshafted code at all. |
| 71 a = get_literal(3); |
| 72 %OptimizeFunctionOnNextCall(get_literal); |
| 73 get_literal(3); |
| 74 assertOptimized(get_literal); |
| 75 assertTrue(%HasFastSmiElements(a)); |
| 76 // a has a memento so the transition caused by the store will affect the |
| 77 // boilerplate. |
| 78 a[0] = 3.5; |
| 79 |
| 80 // We should have transitioned the boilerplate array to double, and |
| 81 // crankshafted code should de-opt on the unexpected elements kind |
| 82 b = get_literal(3); |
| 83 assertTrue(%HasFastDoubleElements(b)); |
| 84 assertEquals([1, 2, 3], b); |
| 85 assertUnoptimized(get_literal); |
| 86 |
| 87 // Optimize again |
| 88 get_literal(3); |
| 89 %OptimizeFunctionOnNextCall(get_literal); |
| 90 b = get_literal(3); |
| 91 assertTrue(%HasFastDoubleElements(b)); |
| 92 assertOptimized(get_literal); |
| 93 |
| 94 |
| 95 // Test: make sure allocation site information is updated through a |
| 96 // transition from SMI->DOUBLE->FAST |
| 97 (function() { |
| 98 function bar(a, b, c) { |
| 99 return [a, b, c]; |
88 } | 100 } |
89 | 101 |
90 get_literal(3); | 102 a = bar(1, 2, 3); |
91 // It's important to store a from before we crankshaft get_literal, because | |
92 // mementos won't be created from crankshafted code at all. | |
93 a = get_literal(3); | |
94 %OptimizeFunctionOnNextCall(get_literal); | |
95 get_literal(3); | |
96 assertOptimized(get_literal); | |
97 assertTrue(%HasFastSmiElements(a)); | |
98 // a has a memento so the transition caused by the store will affect the | |
99 // boilerplate. | |
100 a[0] = 3.5; | 103 a[0] = 3.5; |
101 | 104 a[1] = 'hi'; |
102 // We should have transitioned the boilerplate array to double, and | 105 b = bar(1, 2, 3); |
103 // crankshafted code should de-opt on the unexpected elements kind | 106 assertKind(elements_kind.fast, b); |
104 b = get_literal(3); | 107 })(); |
105 assertTrue(%HasFastDoubleElements(b)); | |
106 assertEquals([1, 2, 3], b); | |
107 assertUnoptimized(get_literal); | |
108 | |
109 // Optimize again | |
110 get_literal(3); | |
111 %OptimizeFunctionOnNextCall(get_literal); | |
112 b = get_literal(3); | |
113 assertTrue(%HasFastDoubleElements(b)); | |
114 assertOptimized(get_literal); | |
115 | |
116 | |
117 // Test: make sure allocation site information is updated through a | |
118 // transition from SMI->DOUBLE->FAST | |
119 (function() { | |
120 function bar(a, b, c) { | |
121 return [a, b, c]; | |
122 } | |
123 | |
124 a = bar(1, 2, 3); | |
125 a[0] = 3.5; | |
126 a[1] = 'hi'; | |
127 b = bar(1, 2, 3); | |
128 assertKind(elements_kind.fast, b); | |
129 })(); | |
130 } | |
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