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// Flags: --allow-natives-syntax
29
30function dead1(a, b) {
31    var x = "a" + "b";
32    return a; // x, "a", and "b" are dead code
33}
34
35function dead2(a, b) {
36    var x = "0" + a;
37    var y = "0" + b;
38    return a; // x and y are both dead
39}
40
41function dead3(a, b) {
42    a = a ? "1" : "0";
43    b = b ? "1" : "0";
44    var x = a + "0";
45    var y = b + "0";
46    return a; // x and y are both dead
47}
48
49function run() {
50  assertEquals(33, dead1(33, 32));
51  assertEquals(33, dead2(33, 32));
52  assertEquals("1", dead3(33, 32));
53
54  assertEquals(31, dead1(31, 30));
55  assertEquals(31, dead2(31, 30));
56  assertEquals("1", dead3(31, 32));
57
58  assertEquals(0, dead1(0, 30));
59  assertEquals(0, dead2(0, 30));
60  assertEquals("0", dead3(0, 32));
61
62  assertEquals(true, dead1(true, 0));
63  assertEquals(true, dead2(true, 0));
64  assertEquals("1", dead3(true, 0));
65
66  assertEquals("true", dead1("true", 0));
67  assertEquals("true", dead2("true", 0));
68  assertEquals("1", dead3("true", 0));
69}
70
71run();
72run();
73%OptimizeFunctionOnNextCall(dead1);
74%OptimizeFunctionOnNextCall(dead2);
75%OptimizeFunctionOnNextCall(dead3);
76run();
77