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); 91
