Reviewers: William Hesse, Description: Experimental: add a simple test for constant folding of conditions in short-circuited boolean operators.
Please review this at http://codereview.chromium.org/27131 SVN Base: http://v8.googlecode.com/svn/branches/experimental/toiger/ Affected files: A test/mjsunit/short-circuit-boolean.js Index: test/mjsunit/short-circuit-boolean.js =================================================================== --- test/mjsunit/short-circuit-boolean.js (revision 0) +++ test/mjsunit/short-circuit-boolean.js (revision 0) @@ -0,0 +1,46 @@ +// Copyright 2009 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. + +// Test some code paths through the compiler for short-circuited +// boolean expressions. + +function andTest0() { + var a = 0; + // Left subexpression is known false at compile time. + return a != 0 && "failure"; +} + +assertFalse(andTest0()); + + +function orTest0() { + var a = 0; + // Left subexpression is known true at compile time. + return a == 0 || "failure"; +} + +assertTrue(orTest0()); --~--~---------~--~----~------------~-------~--~----~ v8-dev mailing list [email protected] http://groups.google.com/group/v8-dev -~----------~----~----~----~------~----~------~--~---
