| commit | 9b0e4e132f7722d95c9e1901ef294c24c15ebe9e | [log] [tgz] |
|---|---|---|
| author | Sigurd Schneider <sigurds@chromium.org> | Mon Nov 19 15:34:54 2018 |
| committer | Commit Bot <commit-bot@chromium.org> | Thu Nov 22 09:19:49 2018 |
| tree | d47ba038629943046ca2f3058f68065689628477 | |
| parent | be11d9b8757958d98b9e3fe73e4c7823780f1207 [diff] |
[turbofan] Make typed optimization more powerful This CL moves optimization capabilities from typed lowering to typed optimization. In particular, this allows retyping of Speculative to number optimizations depending on their input types. This can save type checks if we know that inputs are already in SafeIntegerRange and uses are truncating to 32bit integers. This change recovers the performance lost to 31bit Smis on Octane/crypto on x64: 32bit nosmis avg 30,984.84 stddev 180.52 31bit smis (w/o patch) avg 29,438.52 stddev 120.30 -4.99% 31bit smis avg 31,274.52 stddev 176.26 +0.93% +6.24% Change-Id: I86d6e37305262336f4f7bd46aac0d2cbca11e8c1 Bug: v8:8344 Reviewed-on: https://chromium-review.googlesource.com/c/1323729 Commit-Queue: Sigurd Schneider <sigurds@chromium.org> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Cr-Commit-Position: refs/heads/master@{#57717}
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.