9202e05016
Even if we know that the input to a count operation is a smi we still need to check if the result overflowed (and becomes a heap number). Also fix the smi loop analysis to take two border cases correctly into account. Review URL: http://codereview.chromium.org/1040002 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4147 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
56 lines
2.1 KiB
JavaScript
56 lines
2.1 KiB
JavaScript
// Copyright 2010 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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// Test postfix count operations with smis.
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function f1() { var x = 0x3fffffff; x++; return x; }
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assertEquals(0x40000000, f1());
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function f2() { var x = -0x40000000; x--; return x; }
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assertEquals(-0x40000001, f2());
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function f3(x) { x = x & 0x3fffffff; x++; return x; }
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assertEquals(0x40000000, f3(0x3fffffff));
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function f4() {
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var i;
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for (i = 0x3ffffffe; i <= 0x3fffffff; i++) {}
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return i;
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}
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assertEquals(0x40000000, f4());
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function f5() {
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var i;
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for (i = -0x3fffffff; i >= -0x40000000; i--) {}
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return i;
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}
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assertEquals(-0x40000001, f5());
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