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: --allow-natives-syntax 29 30 // Load fields should not be hoisted beyond their check maps when the check maps 31 // cannot be hoisted due to changes in elements kinds. 32 function f(o, a) { 33 var v; 34 var i = 1; 35 while (i < 2) { 36 v = o.y; 37 a[0] = 1.5; 38 i++; 39 } 40 return v; 41 } 42 43 f({y:1.4}, [1]); 44 f({y:1.6}, [1]); 45 %OptimizeFunctionOnNextCall(f); 46 f({x:1}, [1]); 47 48 // Polymorphic loads should not be hoisted beyond their compare maps. 49 function f2(o) { 50 var i = 0; 51 var v; 52 while (i < 1) { 53 v = o.x; 54 i++; 55 } 56 return v; 57 } 58 59 var o1 = { x: 1.5 }; 60 var o2 = { y: 1, x: 1 }; 61 62 f2(o1); 63 f2(o1); 64 f2(o2); 65 %OptimizeFunctionOnNextCall(f2); 66 f2(o2); 67
