cb9b801069
The previous versions of Math.max and Math.min made it difficult to optimize those (that's why we already have custom code in Crankshaft), and due to lack of ideas what to do about the variable number of arguments, we will probably need to stick in special code in TurboFan as well; so inlining those builtins is off the table, hence there's no real advantage in having them around as "not quite JS" with extra work necessary in the optimizing compilers to still make those builtins somewhat fast in cases where we cannot inline them (also there's a tricky deopt loop in Crankshaft related to Math.min and Math.max, but that will be dealt with later). So to sum up: Instead of trying to make Math.max and Math.min semi-fast in the optimizing compilers with weird work-arounds support %_Arguments %_ArgumentsLength, we do provide the optimal code as native builtins instead and call it a day (which gives a nice performance boost on some benchmarks). R=jarin@chromium.org Review URL: https://codereview.chromium.org/1641083003 Cr-Commit-Position: refs/heads/master@{#33582}
36 lines
1.8 KiB
JavaScript
36 lines
1.8 KiB
JavaScript
// Copyright 2008 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 Math.max with negative zero as input.
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for (var i = 0; i < 5; i++) Math.max(0, 0);
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Math.max(0, 0);
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var r = Math.max(-0, -0);
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assertEquals(-Infinity, 1 / r);
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