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Edit File: regress-3218915.js
// Copyright 2010 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. // Flags: --allow-natives-syntax // Regression test for failure to deoptimize properly when the most recent // side effect occurred in a comma expression in an effect context. // An unoptimizable function, calling it is a side effect. function side_effect() { try {} finally {} return "wrong"; } // A function to observe the value of its first argument. function observe(x, y) { try {} finally {} return x; } // If we optimize for x a smi, then x a string will deopt. The side effect // immediately before the deopt is in a comma expresion in an effect context // (i.e., itself the left subexpression of a comma expression). function test(x) { return observe(this, ((0, side_effect()), x + 1)); } // Run test enough times to get it optimized. for (var i = 0; i < 5; ++i) test(0); %OptimizeFunctionOnNextCall(test); test(0); // Force test to deopt. If it behaves normally, it should return the global // object. If the value of the call to side_effect() is lingering after the // deopt, it will return the string "wrong". assertFalse(test("a") === "wrong");