169f5a9d7b
Only allow changing hole to nan if all uses allow undefined as nan. R=danno@chromium.org Review URL: https://chromiumcodereview.appspot.com/22152003 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16183 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
87 lines
2.9 KiB
JavaScript
87 lines
2.9 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 --notrack-allocation-sites
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// Test adding undefined from hole in double-holey to string.
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var a = [1.5, , 1.8];
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function f(a, i, l) {
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var v = a[i];
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return l + v;
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}
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assertEquals("test1.5", f(a, 0, "test"));
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assertEquals("test1.5", f(a, 0, "test"));
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%OptimizeFunctionOnNextCall(f);
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assertEquals("testundefined", f(a, 1, "test"));
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// Test double-hole going through a phi to a string-add.
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function f2(b, a1, a2) {
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var v;
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if (b) {
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v = a1[0];
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} else {
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v = a2[0];
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}
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x = v * 2;
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return "test" + v + x;
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}
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f2(true, [1.4,1.8,,1.9], [1.4,1.8,,1.9]);
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f2(true, [1.4,1.8,,1.9], [1.4,1.8,,1.9]);
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f2(false, [1.4,1.8,,1.9], [1.4,1.8,,1.9]);
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f2(false, [1.4,1.8,,1.9], [1.4,1.8,,1.9]);
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%OptimizeFunctionOnNextCall(f2);
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assertEquals("testundefinedNaN", f2(false, [,1.8,,1.9], [,1.9,,1.9]));
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// Test converting smi-hole to double-hole.
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function t_smi(a) {
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a[0] = 1.5;
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}
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t_smi([1,,3]);
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t_smi([1,,3]);
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t_smi([1,,3]);
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%OptimizeFunctionOnNextCall(t_smi);
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var ta = [1,,3];
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t_smi(ta);
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ta.__proto__ = [6,6,6];
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assertEquals([1.5,6,3], ta);
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// Test converting double-hole to tagged-hole.
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function t(b) {
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b[1] = {};
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}
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t([1.4, 1.6,,1.8, NaN]);
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t([1.4, 1.6,,1.8, NaN]);
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%OptimizeFunctionOnNextCall(t);
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var a = [1.6, 1.8,,1.9, NaN];
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t(a);
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a.__proto__ = [6,6,6,6,6];
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assertEquals([1.6, {}, 6, 1.9, NaN], a);
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