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1 // Copyright 2013 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 function dead1(a, b) { | |
29 var x = "a" + "b"; | |
30 return a; // x, "a", and "b" are dead code | |
31 } | |
32 | |
33 function dead2(a, b) { | |
34 var x = a + "0"; | |
35 var y = b + "0"; | |
36 return a; // x and y are both dead | |
37 } | |
38 | |
39 function dead3(a, b) { | |
40 a = a ? "1" : "0"; | |
41 b = b ? "1" : "0"; | |
42 var x = a + "0"; | |
43 var y = b + "0"; | |
44 return a; // x and y are both dead | |
45 } | |
46 | |
47 assertEquals(33, dead1(33, 32)); | |
48 assertEquals(33, dead2(33, 32)); | |
49 assertEquals("1", dead3(33, 32)); | |
50 | |
51 assertEquals(31, dead1(31, 30)); | |
52 assertEquals(31, dead2(31, 30)); | |
53 assertEquals("1", dead3(31, 32)); | |
54 | |
55 assertEquals(0, dead1(0, 30)); | |
56 assertEquals(0, dead2(0, 30)); | |
57 assertEquals("0", dead3(0, 32)); | |
58 | |
59 assertEquals(true, dead1(true, 0)); | |
60 assertEquals(true, dead2(true, 0)); | |
61 assertEquals("1", dead3(true, 0)); | |
62 | |
63 assertEquals("true", dead1("true", 0)); | |
64 assertEquals("true", dead2("true", 0)); | |
65 assertEquals("1", dead3("true", 0)); | |
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