ea5e9edac4
This fixes the deoptimizer to materialize arguments objects of correct length even in cases where the actual argument values are unknown and were optimized away by Crankshaft. This can happen if only the length property or the identity of an arguments object is used. R=svenpanne@chromium.org BUG=chromium:163530 TEST=mjsunit/regress/regress-crbug-163530 Review URL: https://codereview.chromium.org/12335132 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13763 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
81 lines
2.8 KiB
JavaScript
81 lines
2.8 KiB
JavaScript
// Copyright 2013 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 materialization of an arguments object with unknown argument
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// values in non-strict mode (length has to be zero).
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(function() {
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var deoptimize = { deopt:true };
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var object = {};
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object.a = function A(x, y, z) {
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assertSame(0, arguments.length);
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return this.b();
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};
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object.b = function B() {
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assertSame(0, arguments.length);
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deoptimize.deopt;
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return arguments.length;
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};
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assertSame(0, object.a());
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assertSame(0, object.a());
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%OptimizeFunctionOnNextCall(object.a);
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assertSame(0, object.a());
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delete deoptimize.deopt;
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assertSame(0, object.a());
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})();
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// Test materialization of an arguments object with unknown argument
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// values in strict mode (length is allowed to exceed stack size).
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(function() {
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'use strict';
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var deoptimize = { deopt:true };
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var object = {};
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object.a = function A(x, y, z) {
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assertSame(0, arguments.length);
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return this.b(1, 2, 3, 4, 5, 6, 7, 8);
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};
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object.b = function B(a, b, c, d, e, f, g, h) {
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assertSame(8, arguments.length);
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deoptimize.deopt;
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return arguments.length;
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};
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assertSame(8, object.a());
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assertSame(8, object.a());
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%OptimizeFunctionOnNextCall(object.a);
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assertSame(8, object.a());
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delete deoptimize.deopt;
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assertSame(8, object.a());
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})();
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