05f3b27cdd
This is a reland of ec6da23bfe
Original change's description:
> [flags] Remove some dead Crankshaft flags.
>
> R=bmeurer@chromium.org
> BUG=v8:6408
>
> Change-Id: I34abbcdc2fc47df44938bac0e59f9982c935c657
> Reviewed-on: https://chromium-review.googlesource.com/569963
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#46631}
Bug: v8:6408
Change-Id: I8a856e25d56e27bccb79588b2e5ee4369d7c5fe5
Reviewed-on: https://chromium-review.googlesource.com/570050
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46637}
49 lines
1.1 KiB
JavaScript
49 lines
1.1 KiB
JavaScript
// Copyright 2016 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 --expose-gc
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var training = {};
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training.a = "nop";
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training.slow = "nop";
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delete training.slow; // Dictionary-mode properties => slow-mode for-in.
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var keepalive = {};
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keepalive.a = "nop"; // Keep a map early in the transition chain alive.
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function GetReal() {
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var r = {};
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r.a = "nop";
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r.b = "nop";
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r.c = "dictionarize",
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r.d = "gc";
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r.e = "result";
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return r;
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};
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function SideEffect(object, action) {
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if (action === "dictionarize") {
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delete object.a;
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} else if (action === "gc") {
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gc();
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}
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}
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function foo(object) {
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for (var key in object) {
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SideEffect(object, object[key]);
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}
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return key;
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}
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// Collect type feedback for slow-mode for-in.
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foo(training);
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SideEffect({a: 0}, "dictionarize");
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SideEffect({}, "gc");
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// Compile for slow-mode objects...
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%OptimizeFunctionOnNextCall(foo);
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// ...and pass in a fast-mode object.
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assertEquals("e", foo(GetReal()));
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