Hi Adrian, hi Michael,
Thank your for your quick answers.
We are looking for an LLVM based version to investigate parallelization
opportunities using existing tools based on LLVM such as in the
following research work:
http://dl.acm.org/citation.cfm?id=2846098
Regarding your answers, I'll try to compile and run JavaScriptCore in
the 2.11.2, 2.11.3 and 2.11.4 releases of WebKit and let you know.
Regards,
--
Manu
On 26/11/2016 14:03, Adrian Perez de Castro wrote:
On Fri, 25 Nov 2016 20:25:54 -0600, Michael Catanzaro <mcatanz...@igalia.com>
wrote:
On Fri, 2016-11-25 at 23:06 +0100, Manuel Selva wrote:
1- What is the last version of Webkit including a JavaScript engine
with
4 tiers and based on LLVM ?
There was not actually ever any stable release that used LLVM. The LLVM
dependency was added during the 2.12 development cycle but removed
before the 2.12.0 release because the LLVM FTL backend was obsoleted by
the B3 (bare bones backend) earlier than we expected. B3 handles the
subset of LLVM intermediate representation needed by JavaScriptCore
much faster than LLVM can, as LLVM needs more features than
JavaScriptCore does. (I don't know more than this; you can ask the JSC
developers on webkit-dev@ if you're interested.)
There's also a nice post in the WebKit blog about the B3 backend:
https://webkit.org/blog/5852/introducing-the-b3-jit-compiler/
Michael is right, and you should use a released version of WebKitGTK+ (none
of which need LLVM), unless you have a very strong reason to use one of the
development snapshots. And even in that case, you would be probably in a
better spot by making your code work with the most recent stable release
because it contains significant improvements and security fixes.
Regards,
—Adrián
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