66 lines
2.4 KiB
JavaScript
66 lines
2.4 KiB
JavaScript
|
// Copyright 2013 the V8 project authors. All rights reserved.
|
||
|
|
// Redistribution and use in source and binary forms, with or without
|
||
|
|
// modification, are permitted provided that the following conditions are
|
||
|
|
// met:
|
||
|
|
//
|
||
|
|
// * Redistributions of source code must retain the above copyright
|
||
|
|
// notice, this list of conditions and the following disclaimer.
|
||
|
|
// * Redistributions in binary form must reproduce the above
|
||
|
|
// copyright notice, this list of conditions and the following
|
||
|
|
// disclaimer in the documentation and/or other materials provided
|
||
|
|
// with the distribution.
|
||
|
|
// * Neither the name of Google Inc. nor the names of its
|
||
|
|
// contributors may be used to endorse or promote products derived
|
||
|
|
// from this software without specific prior written permission.
|
||
|
|
//
|
||
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
|
||
|
|
function dead1(a, b) {
|
||
|
|
var x = "a" + "b";
|
||
|
|
return a; // x, "a", and "b" are dead code
|
||
|
|
}
|
||
|
|
|
||
|
|
function dead2(a, b) {
|
||
|
|
var x = a + "0";
|
||
|
|
var y = b + "0";
|
||
|
|
return a; // x and y are both dead
|
||
|
|
}
|
||
|
|
|
||
|
|
function dead3(a, b) {
|
||
|
|
a = a ? "1" : "0";
|
||
|
|
b = b ? "1" : "0";
|
||
|
|
var x = a + "0";
|
||
|
|
var y = b + "0";
|
||
|
|
return a; // x and y are both dead
|
||
|
|
}
|
||
|
|
|
||
|
|
assertEquals(33, dead1(33, 32));
|
||
|
|
assertEquals(33, dead2(33, 32));
|
||
|
|
assertEquals("1", dead3(33, 32));
|
||
|
|
|
||
|
|
assertEquals(31, dead1(31, 30));
|
||
|
|
assertEquals(31, dead2(31, 30));
|
||
|
|
assertEquals("1", dead3(31, 32));
|
||
|
|
|
||
|
|
assertEquals(0, dead1(0, 30));
|
||
|
|
assertEquals(0, dead2(0, 30));
|
||
|
|
assertEquals("0", dead3(0, 32));
|
||
|
|
|
||
|
|
assertEquals(true, dead1(true, 0));
|
||
|
|
assertEquals(true, dead2(true, 0));
|
||
|
|
assertEquals("1", dead3(true, 0));
|
||
|
|
|
||
|
|
assertEquals("true", dead1("true", 0));
|
||
|
|
assertEquals("true", dead2("true", 0));
|
||
|
|
assertEquals("1", dead3("true", 0));
|