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 --load-elimination 29 30// Test local load elimination of redundant loads and stores. 31 32function B(x, y) { 33 this.x = x; 34 this.y = y; 35 return this; 36} 37 38function test_params1(a, b) { 39 var i = a.x; 40 var j = a.x; 41 var k = b.x; 42 var l = b.x; 43 return i + j + k + l; 44} 45 46assertEquals(14, test_params1(new B(3, 4), new B(4, 5))); 47assertEquals(110, test_params1(new B(11, 7), new B(44, 8))); 48 49%OptimizeFunctionOnNextCall(test_params1); 50 51assertEquals(6, test_params1(new B(1, 7), new B(2, 8))); 52 53function test_params2(a, b) { 54 var o = new B(a + 1, b); 55 o.x = a; 56 var i = o.x; 57 o.x = a; 58 var j = o.x; 59 o.x = b; 60 var k = o.x; 61 o.x = b; 62 var l = o.x; 63 return i + j + k + l; 64} 65 66assertEquals(14, test_params2(3, 4)); 67assertEquals(110, test_params2(11, 44)); 68 69%OptimizeFunctionOnNextCall(test_params2); 70 71assertEquals(6, test_params2(1, 2)); 72