1// Copyright 2010 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28// Flags: --allow-natives-syntax 29 30// Regression test for failure to deoptimize properly when the most recent 31// side effect occurred in a comma expression in an effect context. 32 33// An unoptimizable function, calling it is a side effect. 34function side_effect() { try {} finally {} return "wrong"; } 35 36// A function to observe the value of its first argument. 37function observe(x, y) { try {} finally {} return x; } 38 39// If we optimize for x a smi, then x a string will deopt. The side effect 40// immediately before the deopt is in a comma expresion in an effect context 41// (i.e., itself the left subexpression of a comma expression). 42function test(x) { return observe(this, ((0, side_effect()), x + 1)); } 43 44// Run test enough times to get it optimized. 45for (var i = 0; i < 5; ++i) test(0); 46%OptimizeFunctionOnNextCall(test); 47test(0); 48 49// Force test to deopt. If it behaves normally, it should return the global 50// object. If the value of the call to side_effect() is lingering after the 51// deopt, it will return the string "wrong". 52assertFalse(test("a") === "wrong"); 53