bc4ad49b25
Lithium uses indexes after the maximium value ID in the HGraph as indexes of virtual registers and assumes that the maximum value ID does not change. The IsStandardConstant and GetConstantXX functions could add constants to HGraph, which aliased virtual registers with real values. This could confuse the register allocator to think that a value in a virtual register is tagged and to incorrectly set it in the pointer map. BUG=298269 TEST=mjsunit/regress/regress-298269.js R=verwaest@chromium.org Review URL: https://chromiumcodereview.appspot.com/66693002 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17599 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
45 lines
2.0 KiB
JavaScript
45 lines
2.0 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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function Cb(a) {
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var f, g;
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for(f = a.length; f--;) {
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g = a.charCodeAt(f);
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// This will fail after OSR if Runtime_StringCharCodeAt is modified
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// to iterates optimized frames and visit safepoint pointers.
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}
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return g;
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}
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var s1 = "long string to make cons string 1";
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var s2 = "long string to make cons string 2";
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Cb(s1 + s2);
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Cb(s1);
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var s3 = "string for triggering osr in Cb";
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for (var i = 0; i < 16; i++) s3 = s3 + s3;
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Cb(s3);
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Cb(s1 + s2); |