That's gone with fastcomp now, right? Isn't the relooper built into the
fastcomp clang? (I'm still not on fastcomp)

 - Bruce



On Wed, Mar 19, 2014 at 9:24 AM, Alon Zakai <[email protected]> wrote:

> Yes, emscripten compiles the relooper when it needs to be rebuilt
> (relooper code changed since last you ran it), and then uses it from the
> cache. So you only see this message when it is actually built, rarely.
>
> The relooper is used in -O1 builds or above. (To confirm, check your
> functions are not just a single huge switch with tons of cases.)
>
> - Alon
>
>
>
> On Tue, Mar 18, 2014 at 7:21 PM, Mark Callow 
> <[email protected]>wrote:
>
>>  Hi,
>>
>> Is the message sequence about "bootstrapping relooper" something that
>> only happens the first time you do an optimized compile with a particular
>> Emscripten version on a particular machine? I ask because I've only seen it
>> once and I am worried the relooper is not being used on those compiles when
>> the message does not appear.
>>
>> It is a shame that the LLVM IR does not retain enough information to make
>> a relooper unnecessary. I know it would be technically possible to change
>> it but of course all the front ends would need modifying to emit the new
>> IR, so I suppose it is unlikely to happen.
>>
>> Regards
>>
>>     -Mark
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