bbdd21ebb0
BUG= R=yangguo@chromium.org Review URL: https://codereview.chromium.org/95193002 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18133 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
72 lines
2.4 KiB
JavaScript
72 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 --load-elimination
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// Test local load elimination of redundant loads and stores.
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function B(x, y) {
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this.x = x;
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this.y = y;
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return this;
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}
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function test_params1(a, b) {
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var i = a.x;
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var j = a.x;
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var k = b.x;
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var l = b.x;
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return i + j + k + l;
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}
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assertEquals(14, test_params1(new B(3, 4), new B(4, 5)));
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assertEquals(110, test_params1(new B(11, 7), new B(44, 8)));
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%OptimizeFunctionOnNextCall(test_params1);
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assertEquals(6, test_params1(new B(1, 7), new B(2, 8)));
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function test_params2(a, b) {
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var o = new B(a + 1, b);
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o.x = a;
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var i = o.x;
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o.x = a;
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var j = o.x;
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o.x = b;
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var k = o.x;
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o.x = b;
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var l = o.x;
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return i + j + k + l;
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}
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assertEquals(14, test_params2(3, 4));
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assertEquals(110, test_params2(11, 44));
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%OptimizeFunctionOnNextCall(test_params2);
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assertEquals(6, test_params2(1, 2));
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