62 lines
2.6 KiB
JavaScript
62 lines
2.6 KiB
JavaScript
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// Copyright 2014 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 f(a, b, c) {
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this.a = a;
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this.b = b;
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this.c = c;
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}
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var o3 = new f(1, 2, 3.5);
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var o4 = new f(1, 2.5, 3);
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var o1 = new f(1.5, 2, 3);
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var o2 = new f(1.5, 2, 3);
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function migrate(o) {
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return o.a;
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}
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// Use migrate to stabilize o1, o2 and o4 in [double, double, smi].
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migrate(o4);
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migrate(o1);
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migrate(o2);
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function store_transition(o) {
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o.d = 1;
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}
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// Optimize "store_transition" to transition from [double, double, smi] to
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// [double, double, smi, smi]. This adds a dependency on the
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// [double, double, smi] map.
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store_transition(o4);
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store_transition(o1);
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store_transition(o2);
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%OptimizeFunctionOnNextCall(store_transition);
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// Pass in a deprecated object of format [smi, smi, double]. This will migrate
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// the instance, forcing a merge with [double, double, smi], ending up with
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// [double, double, double], which deprecates [double, double, smi] and
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// deoptimizes all dependencies of [double, double, smi], including
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// store_transition itself.
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store_transition(o3);
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