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. 32function 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 43f({y:1.4}, [1]); 44f({y:1.6}, [1]); 45%OptimizeFunctionOnNextCall(f); 46f({x:1}, [1]); 47 48// Polymorphic loads should not be hoisted beyond their compare maps. 49function 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 59var o1 = { x: 1.5 }; 60var o2 = { y: 1, x: 1 }; 61 62f2(o1); 63f2(o1); 64f2(o2); 65%OptimizeFunctionOnNextCall(f2); 66f2(o2); 67