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| 1 // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are |
| 4 // met: |
| 5 // |
| 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided |
| 11 // with the distribution. |
| 12 // * Neither the name of Google Inc. nor the names of its |
| 13 // contributors may be used to endorse or promote products derived |
| 14 // from this software without specific prior written permission. |
| 15 // |
| 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 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. |
| 27 |
| 28 // Flags: --track-fields --track-double-fields --allow-natives-syntax |
| 29 |
| 30 // Test transitions caused by changes to field representations. |
| 31 |
| 32 function create_smi_object() { |
| 33 var o = {}; |
| 34 o.x = 1; |
| 35 o.y = 2; |
| 36 o.z = 3; |
| 37 return o; |
| 38 } |
| 39 |
| 40 var o1 = create_smi_object(); |
| 41 var o2 = create_smi_object(); |
| 42 |
| 43 // o1,o2 are smi, smi, smi |
| 44 assertTrue(%HaveSameMap(o1, o2)); |
| 45 o1.y = 1.3; |
| 46 // o1 is smi, double, smi |
| 47 assertFalse(%HaveSameMap(o1, o2)); |
| 48 o2.y = 1.5; |
| 49 // o2 is smi, double, smi |
| 50 assertTrue(%HaveSameMap(o1, o2)); |
| 51 |
| 52 // o3 is initialized as smi, double, smi |
| 53 var o3 = create_smi_object(); |
| 54 assertTrue(%HaveSameMap(o1, o3)); |
| 55 |
| 56 function set_large(o, v) { |
| 57 o.x01 = v; o.x02 = v; o.x03 = v; o.x04 = v; o.x05 = v; o.x06 = v; o.x07 = v; |
| 58 o.x08 = v; o.x09 = v; o.x10 = v; o.x11 = v; o.x12 = v; o.x13 = v; o.x14 = v; |
| 59 o.x15 = v; o.x16 = v; o.x17 = v; o.x18 = v; o.x19 = v; o.x20 = v; o.x21 = v; |
| 60 o.x22 = v; o.x23 = v; o.x24 = v; o.x25 = v; o.x26 = v; o.x27 = v; o.x28 = v; |
| 61 o.x29 = v; o.x30 = v; o.x31 = v; o.x32 = v; o.x33 = v; o.x34 = v; o.x35 = v; |
| 62 o.x36 = v; o.x37 = v; o.x38 = v; o.x39 = v; o.x40 = v; o.x41 = v; o.x42 = v; |
| 63 o.y01 = v; o.y02 = v; o.y03 = v; o.y04 = v; o.y05 = v; o.y06 = v; o.y07 = v; |
| 64 o.y08 = v; o.y09 = v; o.y10 = v; o.y11 = v; o.y12 = v; o.y13 = v; o.y14 = v; |
| 65 o.y15 = v; o.y16 = v; o.y17 = v; o.y18 = v; o.y19 = v; o.y20 = v; o.y21 = v; |
| 66 } |
| 67 |
| 68 // Check that large object migrations work. |
| 69 var o4 = {}; |
| 70 // All smi. |
| 71 set_large(o4, 0); |
| 72 assertTrue(%HasFastProperties(o4)); |
| 73 // All double. |
| 74 set_large(o4, 1.5); |
| 75 // o5 is immediately allocated with doubles. |
| 76 var o5 = {}; |
| 77 set_large(o5, 0); |
| 78 assertTrue(%HaveSameMap(o4, o5)); |
| 79 |
| 80 function create_smi_object2() { |
| 81 var o = {}; |
| 82 o.a = 1; |
| 83 o.b = 2; |
| 84 o.c = 3; |
| 85 return o; |
| 86 } |
| 87 |
| 88 // All smi |
| 89 var o6 = create_smi_object2(); |
| 90 var o7 = create_smi_object2(); |
| 91 |
| 92 assertTrue(%HaveSameMap(o6, o7)); |
| 93 // Smi, double, smi. |
| 94 o6.b = 1.5; |
| 95 assertFalse(%HaveSameMap(o6, o7)); |
| 96 // Smi, double, object. |
| 97 o7.c = {}; |
| 98 assertFalse(%HaveSameMap(o6, o7)); |
| 99 // Smi, double, object. |
| 100 o6.c = {}; |
| 101 assertTrue(%HaveSameMap(o6, o7)); |
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