1// Copyright 2009 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// Test of constant folding of boolean-valued expressions. 29 30// See http://code.google.com/p/v8/issues/detail?id=406 31 32assertFalse(typeof(0) == "zero"); 33assertTrue(typeof(0) != "zero"); 34 35// The and and or truth tables with both operands constant. 36assertFalse(typeof(0) == "zero" && typeof(0) == "zero"); 37assertFalse(typeof(0) == "zero" && typeof(0) != "zero"); 38assertFalse(typeof(0) != "zero" && typeof(0) == "zero"); 39assertTrue(typeof(0) != "zero" && typeof(0) != "zero"); 40 41assertFalse(typeof(0) == "zero" || typeof(0) == "zero"); 42assertTrue(typeof(0) == "zero" || typeof(0) != "zero"); 43assertTrue(typeof(0) != "zero" || typeof(0) == "zero"); 44assertTrue(typeof(0) != "zero" || typeof(0) != "zero"); 45 46// Same with just the left operand constant. 47// Helper function to prevent simple constant folding. 48function one() { return 1; } 49 50assertFalse(typeof(0) == "zero" && one() < 0); 51assertFalse(typeof(0) == "zero" && one() > 0); 52assertFalse(typeof(0) != "zero" && one() < 0); 53assertTrue(typeof(0) != "zero" && one() > 0); 54 55assertFalse(typeof(0) == "zero" || one() < 0); 56assertTrue(typeof(0) == "zero" || one() > 0); 57assertTrue(typeof(0) != "zero" || one() < 0); 58assertTrue(typeof(0) != "zero" || one() > 0); 59 60// Same with just the right operand constant. 61assertFalse(one() < 0 && typeof(0) == "zero"); 62assertFalse(one() < 0 && typeof(0) != "zero"); 63assertFalse(one() > 0 && typeof(0) == "zero"); 64assertTrue(one() > 0 && typeof(0) != "zero"); 65 66assertFalse(one() < 0 || typeof(0) == "zero"); 67assertTrue(one() < 0 || typeof(0) != "zero"); 68assertTrue(one() > 0 || typeof(0) == "zero"); 69assertTrue(one() > 0 || typeof(0) != "zero"); 70