| // 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"); |
