f8d5260af7
This enables Crankshaft to use HConstant for loading constant functions on the prototype chain when building a monomorphic load. This pattern appears in several JavaScript frameworks. R=svenpanne@chromium.org TEST=mjsunit/compiler/proto-chain-constant Review URL: https://codereview.chromium.org/12052008 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13463 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
56 lines
2.5 KiB
JavaScript
56 lines
2.5 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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// Test loading a constant function on the prototype chain.
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var c = Object.create;
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var obj4 = c(null, { f4: { value: function() { return 4; }, writable: true }});
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var obj3 = c(obj4, { f3: { value: function() { return 3; }, writable: true }});
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var obj2 = c(obj3, { f2: { value: function() { return 2; }, writable: true }});
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var obj1 = c(obj2, { f1: { value: function() { return 1; }, writable: true }});
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var obj0 = c(obj1, { f0: { value: function() { return 0; }, writable: true }});
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function get4(obj) { return obj.f4; }
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assertEquals(4, get4(obj0)());
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assertEquals(4, get4(obj0)());
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%OptimizeFunctionOnNextCall(get4);
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assertEquals(4, get4(obj0)());
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obj4.f4 = function() { return 5; };
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assertEquals(5, get4(obj0)());
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function get3(obj) { return obj.f3; }
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assertEquals(3, get3(obj0)());
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assertEquals(3, get3(obj0)());
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%OptimizeFunctionOnNextCall(get3);
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assertEquals(3, get3(obj0)());
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obj2.f3 = function() { return 6; };
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assertEquals(6, get3(obj0)());
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