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 32 function B(x, y) { 33 this.x = x; 34 this.y = y; 35 return this; 36 } 37 38 function 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 46 assertEquals(14, test_params1(new B(3, 4), new B(4, 5))); 47 assertEquals(110, test_params1(new B(11, 7), new B(44, 8))); 48 49 %OptimizeFunctionOnNextCall(test_params1); 50 51 assertEquals(6, test_params1(new B(1, 7), new B(2, 8))); 52 53 function 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 66 assertEquals(14, test_params2(3, 4)); 67 assertEquals(110, test_params2(11, 44)); 68 69 %OptimizeFunctionOnNextCall(test_params2); 70 71 assertEquals(6, test_params2(1, 2)); 72
