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
30var test_id = 0;
31
32function 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
51function zero() {
52  var x = 0.5;
53  return (function() { return x - 0.5; })();
54}
55
56function 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.
67for (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.
74function floorsum(i, n) {
75  var ret = Math.floor(n);
76  while (--i > 0) {
77    ret += Math.floor(n);
78  }
79  return ret;
80}
81assertEquals(-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).
85assertEquals(-0, floorsum(100000, -0));
86