v8/test/webkit/dfg-double-vote-fuzz.js

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// Copyright 2013 the V8 project authors. All rights reserved.
// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. 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.
//
// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
description(
"This tests that the static analysis we use to infer if a variable should be a double doesn't crash."
);
var grandResult = 0;
for (var i = 0; i < 256; ++i) {
code = "function foo(o, a, b) {\n";
code += " var x = 0;\n";
code += " var c = a + b;\n";
for (var j = 0; j < 8; ++j)
code += " var " + String.fromCharCode("d".charCodeAt(0) + j) + " = " + ((i & (1 << ((j / 2) | 0))) ? "0.5" : "0") + ";\n";
code += " for (var __i = 0; __i < 10; ++__i) {\n";
code += " if (a + b + 1 > __i) {\n";
code += " c = d;\n";
code += " x += c;\n";
code += " }\n";
code += " if (a + b + 2 > __i) {\n";
code += " c = e;\n";
code += " x += c;\n";
code += " }\n";
code += " if (a + b + 3 > __i) {\n";
code += " c = f;\n";
code += " x += c;\n";
code += " }\n";
code += " if (a + b + 4 > __i) {\n";
code += " c = g;\n";
code += " x += c;\n";
code += " }\n";
code += " if (a + b + 5 > __i) {\n";
code += " c = h;\n";
code += " x += c;\n";
code += " }\n";
code += " if (a + b + 6 > __i) {\n";
code += " c = i;\n";
code += " x += c;\n";
code += " }\n";
code += " if (a + b + 7 > __i) {\n";
code += " c = j;\n";
code += " x += c;\n";
code += " }\n";
code += " if (a + b + 8 > __i) {\n";
code += " c = k;\n";
code += " x += c;\n";
code += " }\n";
for (var j = 0; j < 8; ++j) {
code += " if (a + b + " + (9 + j) + " > __i)\n";
code += " " + String.fromCharCode("d".charCodeAt(0) + j) + " = __i + " + j + " + " + ((i & (1 << (((j / 2) | 0) + 4))) ? "0.5" : "0") + ";\n";
}
code += " }\n";
code += " return x + c;\n";
code += "}\n";
code += "\n";
code += "var result = 0;\n"
code += "for (var __j = 0; __j < 100; ++__j) {\n";
code += " result += foo({}, __j, __j + 1);\n";
code += "}\n";
code += "\n";
code += "result";
var theResult = eval(code);
debug("Result value is " + theResult);
grandResult += theResult;
}
shouldBe("grandResult", "14578304");