788811244e
If not all uses of arithmetic binary operation can be truncated to Smi, check if they can be truncated to Int32 which could avoid minus zero check Fixed DoMulI on X64 to adopt correct operand size when the representation is Smi Fixed DoMulI on ARM. Constant right operand optimization is based on Integer 32 instead of its representation. BUG= R=verwaest@chromium.org Review URL: https://chromiumcodereview.appspot.com/22600005 Patch from Weiliang Lin <weiliang.lin2@gmail.com>. git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16361 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
68 lines
2.3 KiB
JavaScript
68 lines
2.3 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 --noalways-opt
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function mul(a, b) {
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return a * b;
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}
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mul(-1, 2);
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mul(-1, 2);
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%OptimizeFunctionOnNextCall(mul);
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assertEquals(-2, mul(-1, 2));
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assertOptimized(mul);
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// Deopt on minus zero.
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assertEquals(-0, mul(-1, 0));
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assertUnoptimized(mul);
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function mul2(a, b) {
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return a * b;
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}
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mul2(-1, 2);
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mul2(-1, 2);
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%OptimizeFunctionOnNextCall(mul2);
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// 2^30 is a smi boundary on arm and ia32.
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var two_30 = 1 << 30;
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// 2^31 is a smi boundary on x64.
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var two_31 = 2 * two_30;
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if (%IsValidSmi(two_31)) {
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// Deopt on two_31 on x64.
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assertEquals(two_31, mul2(-two_31, -1));
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assertUnoptimized(mul2);
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} else {
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// Deopt on two_30 on ia32.
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assertEquals(two_30, mul2(-two_30, -1));
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assertUnoptimized(mul2);
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}
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