v8/test/mjsunit/regress-sync-optimized-lists.js

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// Copyright 2014 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 --block-concurrent-recompilation
// Flags: --no-concurrent-osr
function Ctor() {
this.a = 1;
}
function get_closure() {
return function add_field(obj, osr) {
obj.c = 3;
var x = 0;
if (osr) {
%OptimizeFunctionOnNextCall(add_field, "osr");
}
for (var i = 0; i < 10; i++) {
x = i + 1;
}
return x;
}
}
var f1 = get_closure();
f1(new Ctor(), false);
f1(new Ctor(), false);
%OptimizeFunctionOnNextCall(f1, "concurrent");
// Kick off concurrent recompilation and OSR.
var o = new Ctor();
f1(o, true);
assertOptimized(f1, "no sync");
// Flush the optimizing compiler's queue.
%NotifyContextDisposed();
assertUnoptimized(f1, "no sync");
// Trigger deopt.
o.c = 2.2;
var f2 = get_closure();
f2(new Ctor(), true);