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 constant folding of smi operations that overflow a 32-bit int 29 // See http://code.google.com/p/v8/issues/detail?id=580 30 31 function num_ops() { 32 var x; 33 var tmp = 0; 34 x = (tmp = 1578221999, tmp)+(tmp = 572285336, tmp); 35 assertEquals(2150507335, x, "++"); 36 x = 1578221999 + 572285336; 37 assertEquals(2150507335, x); 38 39 x = (tmp = -1500000000, tmp)+(tmp = -2000000000, tmp); 40 assertEquals(-3500000000, x, "+-"); 41 x = -1500000000 + -2000000000; 42 assertEquals(-3500000000, x); 43 44 x = (tmp = 1578221999, tmp)-(tmp = -572285336, tmp); 45 assertEquals(2150507335, x, "--"); 46 x = 1578221999 - -572285336; 47 assertEquals(2150507335, x); 48 49 x = (tmp = -1500000000, tmp)-(tmp = 2000000000, tmp); 50 assertEquals(-3500000000, x, "-+"); 51 x = -1500000000 - 2000000000; 52 assertEquals(-3500000000, x); 53 } 54 55 num_ops(); 56
