Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 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); |