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bmeurer 861295bf16 [turbofan] Optimize tagged conversion based on type. 
If we have to convert a float64 value to tagged representation and we
already know that the value is either in Signed31/Signed32 or
Unsigned32 range, then we can just convert the float64 to word32 and
use the fast word32 to tagged conversion. Doing this in
ChangeLowering (or the effect linearization pass) would be unsound, as
the types on the nodes are no longer usable.

This removes all Type uses from effect linearization. There's still some
work to be done for ChangeLowering tho.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1908093002

Cr-Commit-Position: refs/heads/master@{#35713}
2016-04-22 08:40:05 +00:00
benchmarks Revert "Refactoring: Make gtest testsuite the default." 2014-09-02 09:17:26 +00:00
build 32-bit linux: Force 16-byte stack alignment. 2016-04-20 14:29:57 +00:00
docs [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
include Remove isolate arg from EmbedderHeapTracer methods. 2016-04-19 12:55:01 +00:00
infra [CQ] Activate remaining next-gen trybots. 2016-04-12 09:32:11 +00:00
samples Disable soon to be deprecated APIs per default for v8 2015-12-09 10:35:04 +00:00
src [turbofan] Optimize tagged conversion based on type. 2016-04-22 08:40:05 +00:00
test [turbofan] Optimize tagged conversion based on type. 2016-04-22 08:40:05 +00:00
testing Converted V8 CQ config to proto-format 2015-05-28 15:02:53 +00:00
third_party/binutils Update binutils version. 2015-08-07 08:09:49 +00:00
tools [wasm] Extra LEB utilities to leb-helper.h 2016-04-21 10:15:16 +00:00
.clang-format [formatting] Remove the formatting requirement for 2 empty lines between declarations. 2016-01-25 09:50:17 +00:00
.gitignore Add tags file to gitignore 2016-04-06 09:59:02 +00:00
.ycm_extra_conf.py Use C++11 / gnu++11, not 0x 2016-03-22 15:24:43 +00:00
AUTHORS Fix testing of the VEX.L (128/256-bit) flag in the x64 disassembler 2016-04-15 06:24:29 +00:00
BUILD.gn [wasm] Extra LEB utilities to leb-helper.h 2016-04-21 10:15:16 +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. 2016-04-21 09:12:12 +00:00
LICENSE Updates to the license information of third party components. 2015-06-16 12:37:50 +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 Fix android_arm build hosted on Mac 2016-04-13 23:13:35 +00:00
Makefile.android Fix android_arm build hosted on Mac 2016-04-13 23:13:35 +00:00
Makefile.nacl Use the pnacl-clang toolchain for (P)NaCL builds 2014-10-06 08:10:50 +00:00
OWNERS [owners] adding more toplevel owners (but mainly me) 2016-03-16 15:54:42 +00:00
PRESUBMIT.py [cq] Automatically use the same bots for git cl try. 2016-01-14 11:15:16 +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 Revert of Use GCC for snapshot_toolchain when is_clang=false. (patchset #1 id:1 of https://codereview.chromium.org/1809643003/ ) 2016-04-11 08:30:22 +00:00
WATCHLISTS [Interpreter] Make InterpreterAssembler a subclass of CodeStubAssembler. 2016-02-10 16:39:32 +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.