82 lines
2.8 KiB
JavaScript
82 lines
2.8 KiB
JavaScript
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// Copyright 2013 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Flags: --allow-natives-syntax
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var S1 = "string1";
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var S2 = "@@string2";
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function dead1(a, b) {
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var x = %StringCharCodeAt(a, 4);
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return a; // x is dead code
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}
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function dead2(a, b) {
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var x = %StringCharCodeAt(a, 3);
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var y = %StringCharCodeAt(b, 1);
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return a; // x and y are both dead
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}
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function dead3(a, b) {
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a = a ? "11" : "12";
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b = b ? "13" : "14";
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var x = %StringCharCodeAt(a, 2);
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var y = %StringCharCodeAt(b, 0);
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return a; // x and y are both dead
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}
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function test() {
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var S3 = S1 + S2;
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assertEquals(S1, dead1(S1, S2));
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assertEquals(S1, dead2(S1, S2));
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assertEquals("11", dead3(S1, S2));
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assertEquals(S2, dead1(S2, 677));
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assertEquals(S2, dead2(S2, S3));
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assertEquals("11", dead3(S2, S3));
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assertEquals(S3, dead1(S3, 399));
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assertEquals(S3, dead2(S3, "false"));
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assertEquals("12", dead3(0, 32));
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assertEquals(S3, dead1(S3, 0));
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assertEquals(S3, dead2(S3, S1));
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assertEquals("11", dead3(S3, 0));
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assertEquals("true", dead1("true", 0));
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assertEquals("true", dead2("true", S3));
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assertEquals("11", dead3("true", 0));
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}
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test();
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test();
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%OptimizeFunctionOnNextCall(dead1);
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%OptimizeFunctionOnNextCall(dead2);
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%OptimizeFunctionOnNextCall(dead3);
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test();
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