v8/test/mjsunit/compiler/deopt-accessors4.js
Ross McIlroy 31a3cfbc10 [Test] Add PrepareForOptimization to mjsunit/compiler
BUG=v8:8801

Change-Id: I9d9d9824c6c9ad0176bbfd3723da1b578b17c256
Reviewed-on: https://chromium-review.googlesource.com/c/1495555
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60001}
2019-03-04 12:25:41 +00:00

31 lines
622 B
JavaScript

// Copyright 2016 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
var o = {v:1};
var deopt = false;
Object.defineProperty(o, "x", {
get: function() { return this.v; },
set: function(v) {
this.v = v;
if (deopt) {
%DeoptimizeFunction(foo);
}
}
});
function foo(o) {
var x = "x";
return ++o[x];
}
%PrepareFunctionForOptimization(foo);
assertEquals(2, foo(o));
assertEquals(3, foo(o));
%OptimizeFunctionOnNextCall(foo);
deopt = true;
assertEquals(4, foo(o));