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| 1 // Copyright 2012 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: --allow-natives-syntax --expose-gc --inline-construct |
| 29 |
| 30 // Test that inlined object allocation works for different layouts of |
| 31 // objects (e.g. in object properties, slack tracking in progress or |
| 32 // changing of function prototypes) |
| 33 |
| 34 function test_helper(construct, a, b) { |
| 35 return new construct(a, b); |
| 36 } |
| 37 |
| 38 function test(construct) { |
| 39 %DeoptimizeFunction(test); |
| 40 test_helper(construct, 0, 0); |
| 41 test_helper(construct, 0, 0); |
| 42 %OptimizeFunctionOnNextCall(test_helper); |
| 43 // Test adding a new property after allocation was inlined. |
| 44 var o = test_helper(construct, 1, 2); |
| 45 o.z = 3; |
| 46 assertEquals(1, o.x); |
| 47 assertEquals(2, o.y); |
| 48 assertEquals(3, o.z); |
| 49 // Test changing the prototype after allocation was inlined. |
| 50 construct.prototype = { z:6 }; |
| 51 var o = test_helper(construct, 4, 5); |
| 52 assertEquals(4, o.x); |
| 53 assertEquals(5, o.y); |
| 54 assertEquals(6, o.z); |
| 55 %DeoptimizeFunction(test_helper); |
| 56 gc(); // Makes V8 forget about type information for test_helper. |
| 57 } |
| 58 |
| 59 function finalize_slack_tracking(construct) { |
| 60 // Value chosen based on kGenerousAllocationCount = 8. |
| 61 for (var i = 0; i < 8; i++) { |
| 62 new construct(0, 0); |
| 63 } |
| 64 } |
| 65 |
| 66 |
| 67 // Both properties are pre-allocated in object properties. |
| 68 function ConstructInObjectPreAllocated(a, b) { |
| 69 this.x = a; |
| 70 this.y = b; |
| 71 } |
| 72 finalize_slack_tracking(ConstructInObjectPreAllocated); |
| 73 test(ConstructInObjectPreAllocated); |
| 74 |
| 75 |
| 76 // Both properties are unused in object properties. |
| 77 function ConstructInObjectUnused(a, b) { |
| 78 this.x = a < 0 ? 0 : a; |
| 79 this.y = b > 0 ? b : 0; |
| 80 } |
| 81 finalize_slack_tracking(ConstructInObjectUnused); |
| 82 test(ConstructInObjectUnused); |
| 83 |
| 84 |
| 85 // Test inlined allocation while slack tracking is still in progress. |
| 86 function ConstructWhileSlackTracking(a, b) { |
| 87 this.x = a; |
| 88 this.y = b; |
| 89 } |
| 90 test(ConstructWhileSlackTracking); |
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