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Junliang Yan dc65eb54d5 Revert "PPC/s390: [turbofan] Ensure instruction start is in fixed register." 
This reverts commit 89737c5d04.

Reason for revert: Sorry, missed the portion in code-generator

Original change's description:
> PPC/s390: [turbofan] Ensure instruction start is in fixed register.
> 
> Port c462ddc80b
> 
> Original Commit Message:
> 
>     This makes sure that {JSFunction} invocations always load the code start
>     address into the fixed {kJavaScriptCallCodeStartRegister} register. This
>     allows us to perform PC-relative operations more effective. For now this
>     only applies to code with {kCallJSFunction} linkage.
> 
> R=​mstarzinger@chromium.org, joransiu@ca.ibm.com, michael_dawson@ca.ibm.com
> BUG=
> LOG=N
> 
> Change-Id: If346a3cbaea820b1fcec38c5105605496961a888
> Reviewed-on: https://chromium-review.googlesource.com/938721
> Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
> Cr-Commit-Position: refs/heads/master@{#51608}

TBR=mstarzinger@chromium.org,michael_dawson@ca.ibm.com,jyan@ca.ibm.com,joransiu@ca.ibm.com

Change-Id: I9a0810aa35ff39651397055ab53d250c2f6f09e0
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/940341
Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#51617}
2018-02-27 22:35:21 +00:00
benchmarks Fix common misspellings 2017-08-02 09:35:28 +00:00
build_overrides [ndk] Change android ndk root for v8 2018-01-11 08:10:33 +00:00
docs [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
gni Disable snapshots in 64-bit win/cross builds for now. 2018-02-26 10:13:49 +00:00
include [api] Use consistent comments for WebAssembly API functions 2018-02-22 15:15:29 +00:00
infra [CQ] Let msvc-compile block CQ 2018-02-27 19:50:35 +00:00
samples [sample] fix potential memory leak. 2018-02-21 13:06:18 +00:00
src Revert "PPC/s390: [turbofan] Ensure instruction start is in fixed register." 2018-02-27 22:35:21 +00:00
test [typed arrays] GetBuffer returns old buffer for guarded buffers 2018-02-27 20:36:54 +00:00
testing [gyp] move build targets for tests to gypfiles. 2018-01-30 06:31:00 +00:00
third_party Move detect_v8_host_arch out of gypfiles. 2018-01-31 08:21:01 +00:00
tools [tools] Add support for new stack error messages and js stack traces 2018-02-27 09:48:13 +00:00
.clang-format [clang-format] Don't derive pointer alignment 2017-01-17 09:28:19 +00:00
.editorconfig Add .editorconfig 2017-07-28 13:39:24 +00:00
.git-blame-ignore-revs [build] Add DEPS formatting to hyper-blame 2017-10-09 14:08:45 +00:00
.gitignore [gyp] remove gyp files. 2018-02-08 20:04:06 +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
.vpython Add a comment for the VPython dep 2017-10-25 12:23:35 +00:00
.ycm_extra_conf.py [ycm] Switch from gnu++11 to gnu++14 2017-11-27 07:48:21 +00:00
AUTHORS Reland: Reimplement Object.entries/values as CSA to optimize performance. 2018-02-08 10:12:32 +00:00
BUILD.gn [objects.h splitting] Move Microtask-related classes. 2018-02-27 10:44:53 +00:00
ChangeLog [tools] Merge ChangeLog from latest release 2017-12-19 12:30:56 +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 Make Gerrit the default code review for V8 2017-06-30 17:37:37 +00:00
DEPS Update V8 DEPS. 2018-02-24 05:04:34 +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
OWNERS Update top-level OWNERS. 2018-01-19 08:37:12 +00:00
PRESUBMIT.py [gyp] remove gyp files. 2018-02-08 20:04:06 +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]: Generate snapshots on MIPS big-endian targets 2017-11-24 19:00:32 +00:00
WATCHLISTS Remove v8-x87-ports@ from WATCHLIST 2018-02-26 19:56:21 +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.