47d07b8a7b
This makes sure 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. R=erik.corry@gmail.com BUG=chromium:123512 TEST=mjsunit/regress/regress-123512 Review URL: https://chromiumcodereview.appspot.com/10105025 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11350 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
79 lines
3.0 KiB
JavaScript
79 lines
3.0 KiB
JavaScript
// Copyright 2012 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Flags: --allow-natives-syntax
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// Test that boilerplate objects for array literals with non-constant
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// elements (which will contain the hole at non-constant positions) will
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// not cause prototype chain lookups when generating optimized code.
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function f(x) {
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return [x][0];
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}
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// Test data element on prototype.
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Object.prototype[0] = 23;
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assertSame(1, f(1));
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assertSame(2, f(2));
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%OptimizeFunctionOnNextCall(f);
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assertSame(3, f(3));
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%DeoptimizeFunction(f);
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// Test accessor element on prototype.
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Object.prototype.__defineGetter__(0, function() { throw Error(); });
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assertSame(4, f(4));
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assertSame(5, f(5));
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%OptimizeFunctionOnNextCall(f);
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assertSame(6, f(6));
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%DeoptimizeFunction(f);
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// Test the same on boilerplate objects for object literals that contain
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// both non-constant properties and non-constant elements.
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function g(x, y) {
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var o = { foo:x, 0:y };
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return o.foo + o[0];
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}
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// Test data property and element on prototype.
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Object.prototype[0] = 23;
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Object.prototype.foo = 42;
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assertSame(3, g(1, 2));
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assertSame(5, g(2, 3));
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%OptimizeFunctionOnNextCall(g);
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assertSame(7, g(3, 4));
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%DeoptimizeFunction(g);
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// Test accessor property and element on prototype.
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Object.prototype.__defineGetter__(0, function() { throw Error(); });
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Object.prototype.__defineGetter__('foo', function() { throw Error(); });
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assertSame(3, g(1, 2));
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assertSame(5, g(2, 3));
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%OptimizeFunctionOnNextCall(g);
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assertSame(7, g(3, 4));
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%DeoptimizeFunction(g);
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