| commit | 17dbaff9c77c3a3d5a7248fe302a43ca0b51ec26 | [log] [tgz] |
|---|---|---|
| author | bmeurer <bmeurer@chromium.org> | Tue Sep 06 09:08:32 2016 |
| committer | Commit bot <commit-bot@chromium.org> | Tue Sep 06 09:09:07 2016 |
| tree | 336a5e790b2cd79990698daa5634ef18d82b3fc4 | |
| parent | d0e7d41f1cfa696fea44e2322e9861b92de9982a [diff] |
[turbofan] Avoid overflow checks on SpeculativeNumberAdd/Subtract/Multiply. Keep the unrestricted feedback type around during retyping and use that to check whether an overflow check is actually necessary when doing the lowering of SpeculativeNumberAdd/Subtract/Multiply. If based on feedback that is taken for the inputs we already know that the result of the operation fits into Signed32 or Unsigned32 range, then we don't need to perform any overflow checks. R=mvstanton@chromium.org BUG=v8:5267,v8:5270 Review-Url: https://codereview.chromium.org/2309193003 Cr-Commit-Position: refs/heads/master@{#39198}
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.