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Edit File: regress-123512.js
// Copyright 2012 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 // Test that boilerplate objects for array literals with non-constant // elements (which will contain the hole at non-constant positions) will // not cause prototype chain lookups when generating optimized code. function f(x) { return [x][0]; } // Test data element on prototype. Object.prototype[0] = 23; assertSame(1, f(1)); assertSame(2, f(2)); %OptimizeFunctionOnNextCall(f); assertSame(3, f(3)); %DeoptimizeFunction(f); // Test accessor element on prototype. Object.prototype.__defineGetter__(0, function() { throw Error(); }); assertSame(4, f(4)); assertSame(5, f(5)); %OptimizeFunctionOnNextCall(f); assertSame(6, f(6)); %DeoptimizeFunction(f); // Test the same on boilerplate objects for object literals that contain // both non-constant properties and non-constant elements. function g(x, y) { var o = { foo:x, 0:y }; return o.foo + o[0]; } // Test data property and element on prototype. Object.prototype[0] = 23; Object.prototype.foo = 42; assertSame(3, g(1, 2)); assertSame(5, g(2, 3)); %OptimizeFunctionOnNextCall(g); assertSame(7, g(3, 4)); %DeoptimizeFunction(g); // Test accessor property and element on prototype. Object.prototype.__defineGetter__(0, function() { throw Error(); }); Object.prototype.__defineGetter__('foo', function() { throw Error(); }); assertSame(3, g(1, 2)); assertSame(5, g(2, 3)); %OptimizeFunctionOnNextCall(g); assertSame(7, g(3, 4)); %DeoptimizeFunction(g);