commit | bb7138f67a68f3a70e13eade90255b82cdfd035a | [log] [tgz] |
---|---|---|
author | Michael Achenbach <machenbach@chromium.org> | Sat Jan 13 11:16:07 2018 |
committer | Commit Bot <commit-bot@chromium.org> | Sat Jan 13 11:16:28 2018 |
tree | b8ec92a14a307758ac67dc67d6979aa1444360b3 | |
parent | 292ef57c9be0f170c559131722f36bc19f5faef9 [diff] |
Revert "Simplify FunctionKind, saving 4 bits in SharedFunctionInfo" This reverts commit 42667bab5b310b26bfc0ceb300550696cfbbb3ae. Reason for revert: Breaks msvc compile: https://build.chromium.org/p/client.v8/builders/V8%20Win64%20-%20msvc/builds/908 Original change's description: > Simplify FunctionKind, saving 4 bits in SharedFunctionInfo > > Since we only need to store 18 different function kinds, > the bitfield approach was wasting space (requiring 11 bits). > > This patch replaces the bitfield with a regular enum, and > updates all the FunctionKind predicates to use comparisons > instead of bitwise ops. > > For the small amount of builtin code that depended upon being > able to do masking to determine whether something is a class > constructor, we still store two extra bits on FunctionKind, > which are computed when the SFI is initialized. > > If this approach causes performance regressions (i.e., if it > turns out that other code was implicitly depending on masking > for fast checks), we can revert this or address it in > other ways (e.g., by doing similar caching of repeated checks > in the caller). > > Change-Id: Iebb3214f564ea8bd7b21e78fda33517d63247124 > Reviewed-on: https://chromium-review.googlesource.com/860896 > Commit-Queue: Adam Klein <adamk@chromium.org> > Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org> > Cr-Commit-Position: refs/heads/master@{#50559} TBR=adamk@chromium.org,gsathya@chromium.org Change-Id: I8e1faa0ca6213d1e70a00fcb417b1bfa35ebd643 No-Presubmit: true No-Tree-Checks: true No-Try: true Reviewed-on: https://chromium-review.googlesource.com/866310 Reviewed-by: Michael Achenbach <machenbach@chromium.org> Commit-Queue: Michael Achenbach <machenbach@chromium.org> Cr-Commit-Position: refs/heads/master@{#50561}
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
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/*
Please follow the instructions mentioned on the V8 wiki.