Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 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 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 41 | var test_double_input = new Function( |
| 42 | 'n', |
| 43 | '"' + (test_id++) + '";return Math.floor(+n)'); |
| 44 | assertEquals(expect, test_double_input(input)); |
| 45 | assertEquals(expect, test_double_input(input)); |
| 46 | assertEquals(expect, test_double_input(input)); |
| 47 | %OptimizeFunctionOnNextCall(test_double_input); |
| 48 | assertEquals(expect, test_double_input(input)); |
| 49 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 50 | var test_double_output = new Function( |
| 51 | 'n', |
| 52 | '"' + (test_id++) + '";return Math.floor(n) + -0.0'); |
| 53 | assertEquals(expect, test_double_output(input)); |
| 54 | assertEquals(expect, test_double_output(input)); |
| 55 | assertEquals(expect, test_double_output(input)); |
| 56 | %OptimizeFunctionOnNextCall(test_double_output); |
| 57 | assertEquals(expect, test_double_output(input)); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 58 | |
| 59 | var test_via_ceil = new Function( |
| 60 | 'n', |
| 61 | '"' + (test_id++) + '";return -Math.ceil(-n)'); |
| 62 | assertEquals(expect, test_via_ceil(input)); |
| 63 | assertEquals(expect, test_via_ceil(input)); |
| 64 | assertEquals(expect, test_via_ceil(input)); |
| 65 | %OptimizeFunctionOnNextCall(test_via_ceil); |
| 66 | assertEquals(expect, test_via_ceil(input)); |
| 67 | |
| 68 | if (input >= 0) { |
| 69 | var test_via_trunc = new Function( |
| 70 | 'n', |
| 71 | '"' + (test_id++) + '";return Math.trunc(n)'); |
| 72 | assertEquals(expect, test_via_trunc(input)); |
| 73 | assertEquals(expect, test_via_trunc(input)); |
| 74 | assertEquals(expect, test_via_trunc(input)); |
| 75 | %OptimizeFunctionOnNextCall(test_via_trunc); |
| 76 | assertEquals(expect, test_via_trunc(input)); |
| 77 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 78 | } |
| 79 | |
| 80 | function zero() { |
| 81 | var x = 0.5; |
| 82 | return (function() { return x - 0.5; })(); |
| 83 | } |
| 84 | |
| 85 | function test() { |
| 86 | testFloor(0, 0); |
| 87 | testFloor(0, zero()); |
| 88 | testFloor(-0, -0); |
| 89 | testFloor(Infinity, Infinity); |
| 90 | testFloor(-Infinity, -Infinity); |
| 91 | testFloor(NaN, NaN); |
| 92 | } |
| 93 | |
| 94 | |
| 95 | // Test in a loop to cover the custom IC and GC-related issues. |
| 96 | for (var i = 0; i < 100; i++) { |
| 97 | test(); |
| 98 | } |
| 99 | |
| 100 | |
| 101 | // Regression test for a bug where a negative zero coming from Math.floor |
| 102 | // was not properly handled by other operations. |
| 103 | function floorsum(i, n) { |
| 104 | var ret = Math.floor(n); |
| 105 | while (--i > 0) { |
| 106 | ret += Math.floor(n); |
| 107 | } |
| 108 | return ret; |
| 109 | } |
| 110 | assertEquals(-0, floorsum(1, -0)); |
| 111 | %OptimizeFunctionOnNextCall(floorsum); |
| 112 | // The optimized function will deopt. Run it with enough iterations to try |
| 113 | // to optimize via OSR (triggering the bug). |
| 114 | assertEquals(-0, floorsum(100000, -0)); |