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 29 30// Test that boilerplate objects for array literals with non-constant 31// elements (which will contain the hole at non-constant positions) will 32// not cause prototype chain lookups when generating optimized code. 33 34function f(x) { 35 return [x][0]; 36} 37 38// Test data element on prototype. 39Object.prototype[0] = 23; 40assertSame(1, f(1)); 41assertSame(2, f(2)); 42%OptimizeFunctionOnNextCall(f); 43assertSame(3, f(3)); 44%DeoptimizeFunction(f); 45 46// Test accessor element on prototype. 47Object.prototype.__defineGetter__(0, function() { throw Error(); }); 48assertSame(4, f(4)); 49assertSame(5, f(5)); 50%OptimizeFunctionOnNextCall(f); 51assertSame(6, f(6)); 52%DeoptimizeFunction(f); 53 54// Test the same on boilerplate objects for object literals that contain 55// both non-constant properties and non-constant elements. 56 57function g(x, y) { 58 var o = { foo:x, 0:y }; 59 return o.foo + o[0]; 60} 61 62// Test data property and element on prototype. 63Object.prototype[0] = 23; 64Object.prototype.foo = 42; 65assertSame(3, g(1, 2)); 66assertSame(5, g(2, 3)); 67%OptimizeFunctionOnNextCall(g); 68assertSame(7, g(3, 4)); 69%DeoptimizeFunction(g); 70 71// Test accessor property and element on prototype. 72Object.prototype.__defineGetter__(0, function() { throw Error(); }); 73Object.prototype.__defineGetter__('foo', function() { throw Error(); }); 74assertSame(3, g(1, 2)); 75assertSame(5, g(2, 3)); 76%OptimizeFunctionOnNextCall(g); 77assertSame(7, g(3, 4)); 78%DeoptimizeFunction(g); 79