v8/test/mjsunit/ic-megadom.js

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Reland "[ic] Add a new MegaDOM IC" This is a reland of c83c9590baf677665b0872ca68cba2c1cf3524c1 Changes since revert: nothing, issue was crbug.com/v8/11666 Original change's description: > [ic] Add a new MegaDOM IC > > This patch implements the MegaDOM IC setup and access. A new MegaDOM > IC state indicates that we've seen only DOM accessors at this access > site. > > This CL only adds support for DOM getters in LoadIC, other kinds of > access will be added in follow on CLs. > > Still remaining TODO before shipping: > 1. Have a mechanism to invalidate the protector > 2. Have a mechanism to find the accessors that aren't overloaded > 3. Use a new builtin to miss to runtime on access check failure > > Change-Id: Ie12efe5e9fa284f023043b996d61e7d74e710ee2 > Bug: v8:11321 > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2618239 > Reviewed-by: Omer Katz <omerkatz@chromium.org> > Reviewed-by: Camillo Bruni <cbruni@chromium.org> > Reviewed-by: Dan Elphick <delphick@chromium.org> > Reviewed-by: Mythri Alle <mythria@chromium.org> > Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org> > Cr-Commit-Position: refs/heads/master@{#73733} Bug: v8:11321 Change-Id: I2bec54465542b5b40c42adb6eb12b6ce72cce5bd Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2794439 Reviewed-by: Dan Elphick <delphick@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Reviewed-by: Camillo Bruni <cbruni@chromium.org> Reviewed-by: Omer Katz <omerkatz@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org> Cr-Commit-Position: refs/heads/master@{#74056}
2021-04-19 08:31:29 +00:00
// Copyright 2021 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: --enable-mega-dom-ic --allow-natives-syntax
function load(obj) {
return obj.nodeType;
}
%PrepareFunctionForOptimization(load);
var a = new d8.dom.Div();
var b = new d8.dom.Div();
b.b = 1;
var c = new d8.dom.Div();
c.c = 1;
var d = new d8.dom.Div();
d.d = 1;
var e = new d8.dom.Div();
e.e = 1;
var f = new d8.dom.Div();
f.f = 1;
const objs = [
a, b, c, d, e, f
];
function test() {
let result = 0;
for (let i = 0; i < objs.length; i++) {
result += load(objs[i]);
}
return result;
}
%PrepareFunctionForOptimization(test);
let result = test();
assertEquals(6, result);
%OptimizeFunctionOnNextCall(test);
result = test();
assertEquals(6, result);