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Mike Stanton c7990226ec [Turbofan] Introduce TransitionAndStore[Non]NumberElement 
In Array.prototype.map, we have to store the map result in an output array.
If we know we are storing objects, or special objects like boolean, rather
than a number, then we can reduce the amount of checks we have to do to
transition the output array to the appropriate ElementsKind.

Likewise, if we know we've got floating point values, we can specialize 
appropriately to a double array.

Bug: v8:6896
Change-Id: I375daf604562b53638ea749945c1a4c907e33547
Reviewed-on: https://chromium-review.googlesource.com/711845
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48579}
2017-10-16 08:57:18 +00:00
benchmarks Fix common misspellings 2017-08-02 09:35:28 +00:00
build_overrides Remove build_override for macOS min SDK and deployment target. 2017-07-14 18:24:44 +00:00
docs
gni Reland "[build] Switch windows default compilation to MSVS 2017" 2017-09-29 09:36:49 +00:00
gypfiles [test] Remove valgrind support 2017-10-11 07:41:33 +00:00
include fix compile error when use PersistentValueMap. 2017-10-13 10:23:57 +00:00
infra [build] Fix build configs for win-asan 2017-10-16 08:21:13 +00:00
samples [presubmit] Enable and fix "build/namespaces" linter check. 2017-09-04 11:24:26 +00:00
src [Turbofan] Introduce TransitionAndStore[Non]NumberElement 2017-10-16 08:57:18 +00:00
test [Turbofan] Introduce TransitionAndStore[Non]NumberElement 2017-10-16 08:57:18 +00:00
testing
third_party Roll third_party/inspector_protocol to 8cb7a4f50ff7d5b1b7f2e5df0542dc577c88bdc3 2017-10-11 22:52:17 +00:00
tools [build] Fix win-asan compilation 2017-10-16 08:37:15 +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 [wasm] Add uma stat for wasm lazy throughput 2017-10-11 21:00:22 +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
AUTHORS fix compile error when use PersistentValueMap. 2017-10-13 10:23:57 +00:00
BUILD.gn [objects.h splitting] Move Code & related classes. 2017-10-13 14:22:11 +00:00
ChangeLog
CODE_OF_CONDUCT.md
codereview.settings Make Gerrit the default code review for V8 2017-06-30 17:37:37 +00:00
DEPS Update V8 DEPS. 2017-10-16 03:55:17 +00:00
LICENSE
LICENSE.fdlibm
LICENSE.strongtalk
LICENSE.v8
LICENSE.valgrind
Makefile [heap] Port concurrent marking flag to GYP. 2017-08-23 15:26:43 +00:00
Makefile.android
OWNERS Add eholk and gdeepti to toplevel owners 2017-08-12 07:07:29 +00:00
PRESUBMIT.py [iwyu] Turn inclusion presubmit warning into and error. 2017-09-14 10:17:58 +00:00
README.md
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

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.