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bmeurer 385734bf11 [turbofan] Let ChangeFloat64ToTagged canonicalize to Smi if possible. 
When the incoming value to ChangeFloat64ToTagged is in Smi range, we
represent it as Smi instead of a HeapNumber. This addresses a range of
problems where TurboFan unnecessarily deoptimizes because an operation
learned Smi feedback in Ignition, but was then confronted with a tagged
HeapNumber in TurboFan, just because the value was also represented as
unboxed double somewhere in the meantime.

BUG=v8:6256
R=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2815283002
Cr-Commit-Position: refs/heads/master@{#44631}
2017-04-13 06:57:04 +00:00
benchmarks
build_overrides Remove build_overrides/v8.gni. 2017-01-26 20:18:58 +00:00
docs
gni [build] Remove remaining disable-inspector options in GN 2017-04-05 17:59:07 +00:00
gypfiles Remove msvs_cygwin_dirs 2017-04-12 12:18:54 +00:00
include [debug,api] Do not use embedder field for debug context id. 2017-04-12 11:24:44 +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 [turbofan] Let ChangeFloat64ToTagged canonicalize to Smi if possible. 2017-04-13 06:57:04 +00:00
test [turbofan] Let ChangeFloat64ToTagged canonicalize to Smi if possible. 2017-04-13 06:57:04 +00:00
testing Use GTEST_LANG_CXX11 in V8 2016-07-25 13:06:42 +00:00
third_party Adapt String::find method via StringUtil adapter. 2017-02-03 22:17:24 +00:00
tools [tools/dev/gm.py] Remove unused gdb_index. 2017-04-12 15:25:53 +00:00
.clang-format [clang-format] Don't derive pointer alignment 2017-01-17 09:28:19 +00:00
.gitignore Alpha-sort .gitignore. 2017-03-13 06:44:25 +00:00
.gn [build] Add v8gen support for PPC/s390 architecture 2017-03-13 15:05:51 +00:00
.ycm_extra_conf.py
AUTHORS Migrate Number constants and undefined to C++ 2017-02-27 08:20:45 +00:00
BUILD.gn [Interpreter] Remove BytecodePipeline. 2017-04-12 15:18:50 +00:00
ChangeLog
CODE_OF_CONDUCT.md
codereview.settings
DEPS [wasm] Snap to latest version of wasm-js APIs. 2017-04-11 21:06:06 +00:00
LICENSE
LICENSE.fdlibm Add LICENSE.fdlibm for all the fdlibm imported sources. 2016-06-09 07:17:03 +00:00
LICENSE.strongtalk
LICENSE.v8
LICENSE.valgrind
Makefile Make enabling of CSA verifier a build-time flag 2017-01-27 11:32:27 +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
snapshot_toolchain.gni Use clang for snapshot_toolchain by default, except on ChromeOS. 2016-08-23 14:04:27 +00:00
WATCHLISTS Add jbroman to WATCHLISTS for src/value-serializer.*. 2017-03-28 12:51:29 +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.