3edf54337a
... to --turbo-dynamic-map-checks. With the upcoming use in NCI code, this feature is no longer used exclusively by Turboprop. Bug: v8:8888 Change-Id: I61e01db086fd2e8566d2e2a09574be74b6e5a7bd Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2546693 Commit-Queue: Mythri Alle <mythria@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Auto-Submit: Jakob Gruber <jgruber@chromium.org> Cr-Commit-Position: refs/heads/master@{#71263}
36 lines
827 B
JavaScript
36 lines
827 B
JavaScript
// Copyright 2020 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax --turboprop --turbo-dynamic-map-checks --opt
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// Flags: --no-always-opt
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function f(o) {
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return o.b;
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}
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var o = {a:10, b:20};
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var o1 = {a:10, b:20};
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var o2 = {a:10, b:20};
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var o3 = {a:10, b:20, c:30};
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%PrepareFunctionForOptimization(f);
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// Transition IC state to polymorphic.
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f(o);
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f(o3);
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%OptimizeFunctionOnNextCall(f);
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f(o);
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assertOptimized(f);
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f(o);
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// Deprecates O's map.
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o1.b = 10.23;
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// Deoptimizes but retains code.
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f(o1);
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assertOptimized(f);
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// Continues to use optimized code since deprecated map is still in the
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// feedback. ICs don't drop deprecated maps in the polymoprhic case.
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f(o);
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f(o);
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assertOptimized(f);
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