40 lines
900 B
HTML
40 lines
900 B
HTML
<p>Test for overflow when negating the largest negative signed int.</p>
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<p>If the test passes, you'll see a series of PASS messages below.</p>
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<pre id="console"></pre>
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<script>
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function $(id)
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{
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return document.getElementById(id);
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}
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function log(s)
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{
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$("console").appendChild(document.createTextNode(s + "\n"));
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}
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function shouldBe(aDescription, a, b)
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{
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if (a === b) {
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log("PASS: " + aDescription + " should be " + b + " and is.");
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} else {
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log("FAIL: " + aDescription + " should be " + b + " but instead is " + a + ".");
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}
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}
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(function () {
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if (window.testRunner)
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testRunner.dumpAsText();
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// Can be constant-folded by the parser.
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var x = -(-2147483648);
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shouldBe("x", x, 2147483648);
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// Can't be constant-folded without dataflow analysis.
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var y = -2147483648;
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y = -y;
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shouldBe("y", y, 2147483648);
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})();
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</script>
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