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 32 assertFalse(typeof(0) == "zero"); 33 assertTrue(typeof(0) != "zero"); 34 35 // The and and or truth tables with both operands constant. 36 assertFalse(typeof(0) == "zero" && typeof(0) == "zero"); 37 assertFalse(typeof(0) == "zero" && typeof(0) != "zero"); 38 assertFalse(typeof(0) != "zero" && typeof(0) == "zero"); 39 assertTrue(typeof(0) != "zero" && typeof(0) != "zero"); 40 41 assertFalse(typeof(0) == "zero" || typeof(0) == "zero"); 42 assertTrue(typeof(0) == "zero" || typeof(0) != "zero"); 43 assertTrue(typeof(0) != "zero" || typeof(0) == "zero"); 44 assertTrue(typeof(0) != "zero" || typeof(0) != "zero"); 45 46 // Same with just the left operand constant. 47 // Helper function to prevent simple constant folding. 48 function one() { return 1; } 49 50 assertFalse(typeof(0) == "zero" && one() < 0); 51 assertFalse(typeof(0) == "zero" && one() > 0); 52 assertFalse(typeof(0) != "zero" && one() < 0); 53 assertTrue(typeof(0) != "zero" && one() > 0); 54 55 assertFalse(typeof(0) == "zero" || one() < 0); 56 assertTrue(typeof(0) == "zero" || one() > 0); 57 assertTrue(typeof(0) != "zero" || one() < 0); 58 assertTrue(typeof(0) != "zero" || one() > 0); 59 60 // Same with just the right operand constant. 61 assertFalse(one() < 0 && typeof(0) == "zero"); 62 assertFalse(one() < 0 && typeof(0) != "zero"); 63 assertFalse(one() > 0 && typeof(0) == "zero"); 64 assertTrue(one() > 0 && typeof(0) != "zero"); 65 66 assertFalse(one() < 0 || typeof(0) == "zero"); 67 assertTrue(one() < 0 || typeof(0) != "zero"); 68 assertTrue(one() > 0 || typeof(0) == "zero"); 69 assertTrue(one() > 0 || typeof(0) != "zero"); 70
