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bmeurer f850b32d5c [cleanup] Remove instanceof cache.
The instanceof cache was initially introduced to speed up

  x instanceof y

where y is always the same constructor and x is always an object with
the same map. With the introduction of ES2015's @@hasInstance and the
Function.prototype[Symbol.hasInstance] handler (which calls into
OrdinaryHasInstance), this already became quite useless. It doesn't seem
to provide any real value (not sure it ever did for real), but it's
getting in the way of some useful refactorings (i.e. sharing logic
between OrdinaryHasInstance and Object.prototype.isPrototypeOf for
example).

So this CL completely removes the leftover bits of the instanceof cache,
including the GC and SetPrototype logic.

BUG=v8:6479,v8:6474
R=jgruber@chromium.org
TBR=ulan@chromium.org

Review-Url: https://codereview.chromium.org/2932263002
Cr-Commit-Position: refs/heads/master@{#45835}
2017-06-12 06:42:06 +00:00
benchmarks Revert "Refactoring: Make gtest testsuite the default." 2014-09-02 09:17:26 +00:00
build_overrides Remove build_overrides/v8.gni. 2017-01-26 20:18:58 +00:00
docs [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
gni [build] Remove remaining disable-inspector options in GN 2017-04-05 17:59:07 +00:00
gypfiles Introduce a flag to control microtask scope consistency checking 2017-06-02 12:16:19 +00:00
include Basic compilation on Fuchsia 2017-06-11 06:31:33 +00:00
infra [MB] Migrate remaining clusterfuzz bots to new waterfall 2017-06-02 13:07:58 +00:00
samples Reland of land "Turn libbase into a component" (patchset #1 id:1 of https://codereview.chromium.org/2396933002/ ) 2016-10-07 07:56:52 +00:00
src [cleanup] Remove instanceof cache. 2017-06-12 06:42:06 +00:00
test [ia32][wasm] Support AVX instructions for I32x4Splat/ReplaceLane/ExtractLane 2017-06-12 01:57:05 +00:00
testing Use GTEST_LANG_CXX11 in V8 2016-07-25 13:06:42 +00:00
third_party Roll third_party/inspector_protocol to efefa86c3183d307f0a0e53bf568fe57c5b58849 2017-04-28 01:43:03 +00:00
tools [wasm] [cleanup] Avoid shouting WASM 2017-06-09 16:24:19 +00:00
.clang-format [clang-format] Don't derive pointer alignment 2017-01-17 09:28:19 +00:00
.gitignore [build] Always keep gold plugin in sync with clang version 2017-05-30 13:41:18 +00:00
.gn For building v8 using gn on aix_ppc64, linux_s390x and linux_ppc64(both LE and BE). 2017-05-12 01:35:09 +00:00
.ycm_extra_conf.py Use C++11 / gnu++11, not 0x 2016-03-22 15:24:43 +00:00
AUTHORS [parsing] Fix past the end position for streaming streams. 2017-06-09 11:35:24 +00:00
BUILD.gn Stubbed out linking on Fuchsia 2017-06-11 14:34:32 +00:00
ChangeLog [Release] Update ChangeLog file 2016-02-17 21:29:09 +00:00
CODE_OF_CONDUCT.md Explicitly state that the Chromium Code of Conduct also applies to V8 2016-03-02 09:51:24 +00:00
codereview.settings Change presubmit to reference actually existing bot 2017-05-30 09:31:18 +00:00
DEPS Update V8 DEPS. 2017-06-12 03:25:37 +00:00
LICENSE Updates to the license information of third party components. 2015-06-16 12:37:50 +00:00
LICENSE.fdlibm Add LICENSE.fdlibm for all the fdlibm imported sources. 2016-06-09 07:17:03 +00:00
LICENSE.strongtalk Add LICENSE.v8, LICENSE.strongtalk and LICENSE.valgrind to the v8 2011-02-03 07:10:06 +00:00
LICENSE.v8 Add LICENSE.v8, LICENSE.strongtalk and LICENSE.valgrind to the v8 2011-02-03 07:10:06 +00:00
LICENSE.valgrind Add LICENSE.v8, LICENSE.strongtalk and LICENSE.valgrind to the v8 2011-02-03 07:10:06 +00:00
Makefile [build] Life support for top-level Makefile. 2017-06-07 13:10:40 +00:00
Makefile.android [build] Fix d8-for-Android builds 2016-05-20 12:10:45 +00:00
OWNERS Add COMPONENT tags to OWNERS files where appropriate 2017-05-22 10:15:28 +00:00
PRESUBMIT.py [test] Automatically add a noi18n bot for changes affecting Intl 2017-06-06 13:01:14 +00:00
README.md [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
snapshot_toolchain.gni MIPS[64]: Add support for big endian build using GN 2017-06-02 15:02:18 +00:00
WATCHLISTS [V8Tracing] Add lpy@ and fmeawad@ into watchlist for tracing/. 2017-05-22 19:40:17 +00:00

V8 JavaScript Engine

V8 is Google's open source JavaScript engine.

V8 implements ECMAScript as specified in ECMA-262.

V8 is written in C++ and is used in Google Chrome, the open source browser from Google.

V8 can run standalone, or can be embedded into any C++ application.

V8 Project page: https://github.com/v8/v8/wiki

Getting the Code

Checkout depot tools, and run

    fetch v8

This will checkout V8 into the directory v8 and fetch all of its dependencies. To stay up to date, run

    git pull origin
    gclient sync

For fetching all branches, add the following into your remote configuration in .git/config:

    fetch = +refs/branch-heads/*:refs/remotes/branch-heads/*
    fetch = +refs/tags/*:refs/tags/*

Contributing

Please follow the instructions mentioned on the V8 wiki.