AuroraMiddleware/v8
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jarin 6f559b7ec3 [turbofan] Fix lazy deopt for JSToNumber conversions in binary operations. 
This slightly hacky change provides lazy deopt points for to-number conversions in binops: When we deopt from a to-number conversion, we create a frame state with the already-converted value(s) so that we do not repeat the side effect of the conversion.

Embenchen numbers are below. It is not quite clear what happened to fasta - the hot code looks nearly identical.

Current: EmbenchenBox2d(RunTime): 12746 ms.
d8-master: EmbenchenBox2d(RunTime): 13861 ms.
----------- bullet.js
Current: EmbenchenBullet(RunTime): 17680 ms.
d8-master: EmbenchenBullet(RunTime): 19170 ms.
----------- copy.js
Current: EmbenchenCopy(RunTime): 4939 ms.
d8-master: EmbenchenCopy(RunTime): 4943 ms.
----------- corrections.js
Current: EmbenchenCorrections(RunTime): 6639 ms.
d8-master: EmbenchenCorrections(RunTime): 6728 ms.
----------- fannkuch.js
Current: EmbenchenFannkuch(RunTime): 4630 ms.
d8-master: EmbenchenFannkuch(RunTime): 4872 ms.
----------- fasta.js
Current: EmbenchenFasta(RunTime): 10209 ms.
d8-master: EmbenchenFasta(RunTime): 9673 ms.
----------- lua_binarytrees.js
Current: EmbenchenLuaBinaryTrees(RunTime): 12936 ms.
d8-master: EmbenchenLuaBinaryTrees(RunTime): 15529 ms.
----------- memops.js
Current: EmbenchenMemOps(RunTime): 7357 ms.
d8-master: EmbenchenMemOps(RunTime): 7340 ms.
----------- primes.js
Current: EmbenchenPrimes(RunTime): 7530 ms.
d8-master: EmbenchenPrimes(RunTime): 7457 ms.
----------- skinning.js
Current: EmbenchenSkinning(RunTime): 15832 ms.
d8-master: EmbenchenSkinning(RunTime): 15630 ms.
----------- zlib.js
Current: EmbenchenZLib(RunTime): 11176 ms.
d8-master: EmbenchenZLib(RunTime): 11324 ms.

BUG=

Review URL: https://codereview.chromium.org/985713003

Cr-Commit-Position: refs/heads/master@{#27071}
2015-03-09 13:24:42 +00:00
benchmarks Revert "Refactoring: Make gtest testsuite the default." 2014-09-02 09:17:26 +00:00
build introduce android_x64 build target 2015-03-09 03:23:12 +00:00
include add V8_DEPRECATE_SOON macros to make it easier to identify calls which need deprecation 2015-03-09 09:49:28 +00:00
samples shell.cc race condition 2015-02-02 08:08:31 +00:00
src [turbofan] Fix lazy deopt for JSToNumber conversions in binary operations. 2015-03-09 13:24:42 +00:00
test [turbofan] Fix lazy deopt for JSToNumber conversions in binary operations. 2015-03-09 13:24:42 +00:00
testing Add linux dbg coverage to CQ. 2015-02-24 16:39:23 +00:00
third_party/binutils Ignore unsupport host architectures for binutils download. 2015-02-10 07:51:42 +00:00
tools introduce android_x64 build target 2015-03-09 03:23:12 +00:00
.clang-format Change clang-format config to allow for two empty lines between functions 2013-12-03 10:39:21 +00:00
.gitignore Port chromium landmines script. 2015-02-24 16:57:47 +00:00
.ycm_extra_conf.py [ycm] The YouCompleteMe configuration is not VIM specific. 2015-02-12 07:21:13 +00:00
AUTHORS Fix preparing log file name. 2015-03-03 11:03:49 +00:00
BUILD.gn Move compilation error handling into a separate class. 2015-02-25 14:18:34 +00:00
ChangeLog Upgrade version and change log after branch. 2014-11-10 10:41:13 +00:00
codereview.settings Removed TRYSERVER_ROOT since this is not used anymore 2015-01-28 11:04:32 +00:00
DEPS Update V8 DEPS. 2015-03-05 04:24:20 +00:00
LICENSE Update LICENSE date. 2014-02-18 10:50:22 +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 android_x64 build target 2015-03-09 03:23:12 +00:00
Makefile.android introduce android_x64 build target 2015-03-09 03:23:12 +00:00
Makefile.nacl Use the pnacl-clang toolchain for (P)NaCL builds 2014-10-06 08:10:50 +00:00
OWNERS Add Erik Arvidsson to OWNERS 2015-01-28 18:23:29 +00:00
PRESUBMIT.py Add public version macros. 2015-02-26 08:59:23 +00:00
README.md Update all DEPS to match chromium's DEPS at edb488e 2014-12-08 12:27:26 +00:00
WATCHLISTS Add myself to a watchlist for the public API. 2013-10-10 11:37:48 +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://code.google.com/p/v8/

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/*