1 // Copyright 2011 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 // Flags: --max-semi-space-size=1 --allow-natives-syntax 29 30 var test_id = 0; 31 32 function testFloor(expect, input) { 33 var test = new Function('n', 34 '"' + (test_id++) + '";return Math.floor(n)'); 35 assertEquals(expect, test(input)); 36 assertEquals(expect, test(input)); 37 assertEquals(expect, test(input)); 38 %OptimizeFunctionOnNextCall(test); 39 assertEquals(expect, test(input)); 40 41 var test_double_output = new Function( 42 'n', 43 '"' + (test_id++) + '";return Math.floor(n) + -0.0'); 44 assertEquals(expect, test_double_output(input)); 45 assertEquals(expect, test_double_output(input)); 46 assertEquals(expect, test_double_output(input)); 47 %OptimizeFunctionOnNextCall(test_double_output); 48 assertEquals(expect, test_double_output(input)); 49 } 50 51 function zero() { 52 var x = 0.5; 53 return (function() { return x - 0.5; })(); 54 } 55 56 function test() { 57 testFloor(0, 0); 58 testFloor(0, zero()); 59 testFloor(-0, -0); 60 testFloor(Infinity, Infinity); 61 testFloor(-Infinity, -Infinity); 62 testFloor(NaN, NaN); 63 } 64 65 66 // Test in a loop to cover the custom IC and GC-related issues. 67 for (var i = 0; i < 100; i++) { 68 test(); 69 } 70 71 72 // Regression test for a bug where a negative zero coming from Math.floor 73 // was not properly handled by other operations. 74 function floorsum(i, n) { 75 var ret = Math.floor(n); 76 while (--i > 0) { 77 ret += Math.floor(n); 78 } 79 return ret; 80 } 81 assertEquals(-0, floorsum(1, -0)); 82 %OptimizeFunctionOnNextCall(floorsum); 83 // The optimized function will deopt. Run it with enough iterations to try 84 // to optimize via OSR (triggering the bug). 85 assertEquals(-0, floorsum(100000, -0)); 86
