bd9274436c
This improves register allocation for many common add and multiply patterns on ia32 and x64 by reducing register pressure. R=jkummerow@chromium.org Review URL: https://codereview.chromium.org/14856015 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14587 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
85 lines
2.4 KiB
JavaScript
85 lines
2.4 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
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function a() {
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var sum = 0;
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for (var i = 0; i < 500; ++i) {
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sum = (i + sum) | 0;
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}
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return sum;
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}
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function b() {
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var sum = 0;
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for (var i = -500; i < 0; ++i) {
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sum = (i + sum) | 0;
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}
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return sum;
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}
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function c() {
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var sum = 0;
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for (var i = 0; i < 500; ++i) {
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sum += (i + -0x7fffffff) | 0;
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}
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return sum;
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}
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function d() {
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var sum = 0;
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for (var i = -501; i < 0; ++i) {
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sum += (i + 501) | 0;
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}
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return sum;
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}
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a();
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a();
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%OptimizeFunctionOnNextCall(a);
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assertEquals(124750, a());
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assertEquals(124750, a());
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b();
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b();
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%OptimizeFunctionOnNextCall(b);
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assertEquals(-125250, b());
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assertEquals(-125250, b());
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c();
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c();
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%OptimizeFunctionOnNextCall(c);
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assertEquals(-1073741698750, c());
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assertEquals(-1073741698750, c());
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d();
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d();
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%OptimizeFunctionOnNextCall(d);
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assertEquals(125250, d());
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assertEquals(125250, d());
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