v8/test/mjsunit/regress/regress-crbug-786723.js
Michael Starzinger 4a7eec590c [turbofan] Fix prototype mutation in Object.create lowering.
This makes sure the builtin lowering of Object.create doesn't invalidate
any previously taken dependencies. Aborting compilation after such cases
would lead to repeating optimization attempts without learning, hence we
disallow such situations.

R=verwaest@chromium.org
BUG=chromium:794394,chromium:786723

Change-Id: I6b6928cab19692bbbe3cd241ade862a2306eb0c7
Reviewed-on: https://chromium-review.googlesource.com/827066
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50128}
2017-12-15 12:36:34 +00:00

20 lines
414 B
JavaScript

// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --allow-natives-syntax --expose-gc --function-context-specialization
function f() {
var o = {};
function g() {
o.x = 1;
return Object.create(o);
};
gc();
o.x = 10;
%OptimizeFunctionOnNextCall(g);
g();
}
f();
f();