Right, sorry for forgetting that - added to the wiki page now.

- Alon



On Thu, Feb 20, 2014 at 5:38 PM, Chad Austin <[email protected]> wrote:

> To anyone who's curious: note that embind does not currently work on
> fastcomp.  To make it work, we will need to rework a few things, mainly how
> function pointers are generated at runtime and how functions are looked up
> in the function tables (now plural).
>
> Alas, my employer is under no pressure to fund this work, but if you want
> to take it on, I have some ideas about how to make it work.
>
> embind should continue to work in the old compiler.
>
> Cheers,
> Chad
>
>
>
> On Thu, Feb 20, 2014 at 5:17 PM, Alon Zakai <[email protected]> wrote:
>
>> The last missing features for fastcomp
>>
>> https://github.com/kripken/emscripten/wiki/LLVM-Backend
>>
>> have landed, namely indirect branches, better function pointer error
>> messages, bindings generator support, gl emulation support, and other
>> stuff. At this point everything that the old compiler could do, **and is
>> not deprecated or considering a rewrite**, is functional and enabled in the
>> test suite.
>>
>> There are various deprecated features like non-typed arrays support,
>> various settings.js options like HEAP_INIT, etc., which will not be ported
>> to fastcomp. The old compiler will remain an option for those.
>>
>> Perhaps the biggest missing thing is linking support. This is not
>> deprecated, but there are some issues with it - it works on C code, but C++
>> can break it. For that reason we may want to reconsider our linking
>> approach, so there is no point adding that to fastcomp before doing so.
>> Also, linking is less crucial for fastcomp anyhow - linking has been a way
>> to avoid rebuilding big projects, but fastcomp is fast enough to rebuild
>> entire projects anyhow, and full rebuilds will give more optimal results
>> due to the compiler seeing all the code together and putting it all in one
>> asm.js module.
>>
>> The plan forward is something like this:
>>
>> 0. Merge master to incoming one last time with fastcomp not yet on by
>> default. That will probably be tagged version 1.8.
>>
>> 1. Land some misc stuff on incoming for fastcomp: change the test suite
>> to run it by default, with some amount of old compiler testing still on,
>> add warnings in case people do not have the proper LLVM build, etc.
>>
>>  2. Enable fastcomp by default on the incoming branch and tag version
>> 1.9.
>>
>> 3. Get feedback and fix bugs on incoming. This will take an uncertain
>> amount of time, during which no merges to master will occur.
>>
>> 4. Merge to master when things are deemed stable and tag version 2.0.
>>
>> 5. Further testing and fixes (as the code has reached a larger range of
>> users).
>>
>> 6. juj will make SDK builds with the new stable version of emscripten
>> which will contain fastcomp.
>>
>> Please let me know about any thoughts or concerns about this plan.
>>
>> - Alon
>>
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>
>
>
> --
> Chad Austin
> Technical Director, IMVU
> http://engineering.imvu.com <http://www.imvu.com/members/Chad/>
> http://chadaustin.me
>
>
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