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bmeurer 53d31d0623 Revert of [turbofan] General consolidation of element access. (patchset #1 id:1 of https://codereview.chromium.org/2836913004/ ) 
Reason for revert:
Breaks load:tools:drive story

Original issue's description:
> [turbofan] General consolidation of element access.
>
> Avoid TransitionElementsKind when storing to objects which only differ
> in holeyness of their elements kind. Instead go for polymorphic
> CheckMaps, which can often by optimized and avoid the mutation of the
> array map.
>
> This generalizes the approach https://codereview.chromium.org/2836943003
> which covered only element loads.
>
> R=yangguo@chromium.org
> BUG=v8:5267
>
> Review-Url: https://codereview.chromium.org/2836913004
> Cr-Commit-Position: refs/heads/master@{#44828}
> Committed: ed573cee5c

TBR=yangguo@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=v8:5267,chromium:715936

Review-Url: https://codereview.chromium.org/2852623002
Cr-Commit-Position: refs/heads/master@{#44958}
2017-04-28 05:40:46 +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 [intl] Reorganize code 2017-04-24 13:54:15 +00:00
include Expose the ValueSerializer data format version as a compile-time constant. 2017-04-27 15:14:41 +00:00
infra [cq] Get codereview coverage bot's experiment percentage back to 100 2017-04-11 15:04:39 +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 Revert of [turbofan] General consolidation of element access. (patchset #1 id:1 of https://codereview.chromium.org/2836913004/ ) 2017-04-28 05:40:46 +00:00
test [ia32] Add cmpps/vcmpps for eq/lt/le/neq 2017-04-28 01:56:26 +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 [tools] backport_node.py increments V8 version in target. 2017-04-27 14:50:10 +00:00
.clang-format [clang-format] Don't derive pointer alignment 2017-01-17 09:28:19 +00:00
.gitignore [wasm] Add wasm spec tests to the v8 test runner 2017-04-27 13:00:13 +00:00
.gn [build] Add v8gen support for PPC/s390 architecture 2017-03-13 15:05:51 +00:00
.ycm_extra_conf.py Use C++11 / gnu++11, not 0x 2016-03-22 15:24:43 +00:00
AUTHORS Migrate Number constants and undefined to C++ 2017-02-27 08:20:45 +00:00
BUILD.gn Expose the ValueSerializer data format version as a compile-time constant. 2017-04-27 15:14:41 +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 Use v8-reviews@ for review mail, so v8-dev@ is free for dev discussions 2015-09-09 08:14:11 +00:00
DEPS Update V8 DEPS. 2017-04-28 03:31:45 +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 Introduce mkgrokdump to update tools/v8heapconst.py. 2017-04-20 06:15:02 +00:00
Makefile.android [build] Fix d8-for-Android builds 2016-05-20 12:10:45 +00:00
OWNERS Update to OWNER files. 2017-03-21 10:01:16 +00:00
PRESUBMIT.py [test] Enforce tracker prefix for all BUG entries 2017-03-14 16:16:22 +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 Use clang for snapshot_toolchain by default, except on ChromeOS. 2016-08-23 14:04:27 +00:00
WATCHLISTS Remove ulan@ from heap watchlist. 2017-04-27 09:36:43 +00:00

README.md

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.