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danno 7de21c4d3b [builtins] Separate Array.prototype.* CSA builtins into two parts 
Previous to this CL, CSA-optimized Array builtins--like forEach, some, and
every--were written in a single, monolithic block of CSA code.

This CL teases the code for each of these builtins apart into two chunks, a main
body with optimizations for fast cases, and a "continuation" builtin that
performs a spec-compliant, but slower version of the main loop of the
builtin. The general idea is that when the "fast" main body builtin encounters
an unexpected condition that invalidates assumptions allowing fast-case code, it
tail calls to the slow, correct version of the loop that finishes the builtin
execution.

This separation currently doens't really provide any specific advantage over the
combined version. However, it paves the way to TF-optimized inlined Array
builtins. Inlined Array builtins may trigger deopts during the execution of the
builtin's loop, and those deopt must continue execution from the point at which
they failed. With some massaging of the deoptimizer, it will be possible to make
those deopt points create an extra frame on the top of the stack which resumes
execution in the slow-loop builtin created in this CL.

BUG=v8:1956
LOG=N

Review-Url: https://codereview.chromium.org/2753793002
Cr-Commit-Position: refs/heads/master@{#43867}
2017-03-16 15:34:01 +00:00
benchmarks
build_overrides Remove build_overrides/v8.gni. 2017-01-26 20:18:58 +00:00
docs
gni Make sure a pure list of headers is never turned into a static library 2017-02-13 08:43:43 +00:00
gypfiles [build] Fix gyp files for building inspector 2017-03-02 09:55:56 +00:00
include FunctionEntryHook: require no-snapshot build 2017-03-14 12:31:03 +00:00
infra [build] Add v8gen support for PPC/s390 architecture 2017-03-13 15:05:51 +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 [builtins] Separate Array.prototype.* CSA builtins into two parts 2017-03-16 15:34:01 +00:00
test Collect type profile for DevTools 2017-03-16 15:01:31 +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 Add missing sub-repository in update_node.py. 2017-03-16 12:54:55 +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 [csa] Add CSA::CallBuiltin and Builtins::CallableFor 2017-03-16 14:22:12 +00:00
ChangeLog
CODE_OF_CONDUCT.md
codereview.settings
DEPS Update V8 DEPS. 2017-03-16 03:23:00 +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 Make clemensh owner (wasm, asmjs and general) 2017-01-13 10:20:44 +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 [inspector] added devtools-reviews@chromium.org in WATCHLISTS for inspector 2016-09-29 15:16:54 +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.