1// Copyright 2010 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 overflow checks in optimized code. 29function testMul(a, b) { 30 a *= 2; 31 b *= 2; 32 if (a < 1 && b < 1) { 33 return a * b; 34 } 35} 36 37for (var i=0; i<1000000; i++) testMul(0,0); 38assertEquals(4611686018427388000, testMul(-0x40000000, -0x40000000)); 39 40function testAdd(a, b) { 41 a *= 2; 42 b *= 2; 43 if (a < 1 && b < 1) { 44 return a + b; 45 } 46} 47 48for (var i=0; i<1000000; i++) testAdd(0,0); 49assertEquals(-4294967296, testAdd(-0x40000000, -0x40000000)); 50 51 52function testSub(a, b) { 53 a *= 2; 54 b *= 2; 55 if (b == 2) {print(a); print(b);} 56 if (a < 1 && b < 3) { 57 return a - b; 58 } 59} 60 61for (var i=0; i<1000000; i++) testSub(0,0); 62assertEquals(-2147483650, testSub(-0x40000000, 1)); 63