1a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Copyright 2009 the V8 project authors. All rights reserved. 2a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Redistribution and use in source and binary forms, with or without 3a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// modification, are permitted provided that the following conditions are 4a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// met: 5a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 6a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions of source code must retain the above copyright 7a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// notice, this list of conditions and the following disclaimer. 8a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions in binary form must reproduce the above 9a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// copyright notice, this list of conditions and the following 10a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// disclaimer in the documentation and/or other materials provided 11a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// with the distribution. 12a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Neither the name of Google Inc. nor the names of its 13a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// contributors may be used to endorse or promote products derived 14a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// from this software without specific prior written permission. 15a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 16a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 28a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Test of constant folding of boolean-valued expressions. 29a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 30a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// See http://code.google.com/p/v8/issues/detail?id=406 31a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 32a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertFalse(typeof(0) == "zero"); 33a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertTrue(typeof(0) != "zero"); 34a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 35a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// The and and or truth tables with both operands constant. 36a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertFalse(typeof(0) == "zero" && typeof(0) == "zero"); 37a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertFalse(typeof(0) == "zero" && typeof(0) != "zero"); 38a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertFalse(typeof(0) != "zero" && typeof(0) == "zero"); 39a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertTrue(typeof(0) != "zero" && typeof(0) != "zero"); 40a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 41a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertFalse(typeof(0) == "zero" || typeof(0) == "zero"); 42a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertTrue(typeof(0) == "zero" || typeof(0) != "zero"); 43a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertTrue(typeof(0) != "zero" || typeof(0) == "zero"); 44a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertTrue(typeof(0) != "zero" || typeof(0) != "zero"); 45a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 46a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Same with just the left operand constant. 47a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Helper function to prevent simple constant folding. 48a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockfunction one() { return 1; } 49a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 50a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertFalse(typeof(0) == "zero" && one() < 0); 51a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertFalse(typeof(0) == "zero" && one() > 0); 52a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertFalse(typeof(0) != "zero" && one() < 0); 53a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertTrue(typeof(0) != "zero" && one() > 0); 54a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 55a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertFalse(typeof(0) == "zero" || one() < 0); 56a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertTrue(typeof(0) == "zero" || one() > 0); 57a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertTrue(typeof(0) != "zero" || one() < 0); 58a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertTrue(typeof(0) != "zero" || one() > 0); 59a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 60a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Same with just the right operand constant. 61a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertFalse(one() < 0 && typeof(0) == "zero"); 62a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertFalse(one() < 0 && typeof(0) != "zero"); 63a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertFalse(one() > 0 && typeof(0) == "zero"); 64a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertTrue(one() > 0 && typeof(0) != "zero"); 65a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 66a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertFalse(one() < 0 || typeof(0) == "zero"); 67a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertTrue(one() < 0 || typeof(0) != "zero"); 68a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertTrue(one() > 0 || typeof(0) == "zero"); 69a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertTrue(one() > 0 || typeof(0) != "zero"); 70