RFR: 8164652: c1 port

[Andrey Petushkov]

Hi Ed,
> On 02 Sep 2016, at 14:01, Edward Nevill <edward.nevill at gmail.com> wrote:
> 
> Hi Andrey,
> 
> Now that I have got back from holiday I have had a chance to try this.
> 
> The following is what I tried.
> 
> - Initial C1 build.
> - Rebuild using C1 above
> - Build 'core' to check this still works
> - Run jtreg hotspot and langtools
> - Build a fastdebug version
> - Run jtreg hotspot and langtools using the fastdebug vsn
> 
> The only problem I noticed was there were a couple of assertion
> failures running jtreg hotspot with the fastdebug version.
Thank you, we did not check fastdebug thoroughly. Will take a look
> 
> Apart from that it seems pretty solid.
> 
> I also did some benchmarking. I am not going to disclose the results on
> the list, but I was very pleased with the results, >> 50X performance
> improvement over template interpreter.
> 
> If there are no objections I will tag the current state of the tree and
> push this within the next day or so. Do you have a list of all the
> contributors at Azul so I can add them to the commit?
The developers of the c1 port is the following:
Andrey Petushkov / andrey.petushkov at gmail.com / apetushkov
Anton Kozlov / akozlov at azul.com
Fedor Burdun / fedor.burdun at azulsystems.com
Sergey Nazarkin / snazarkin at azul.com / snazarki
Alexey Bakhtin / alexey.bakhtin at gmail.com
> 
> Thanks for this. This will make a lot of people very happy.
:)
Thanks to you for leading the effort!

Regards,
Andrey
> 
> Ed.
> 
> On Fri, 2016-08-26 at 13:29 +0300, Andrey Petushkov wrote:
>> Dear All,
>> 
>> Please consider the following patch which brings the port of C1
>> compiler to the aarch32 platform. The effort is done by Azul Systems
>> and takes the roots from AArch64 implementation.
>> There are very few cosmetic changes which are not directly related to
>> the port. In addition there is a change to the behaviour of branch
>> emission logic. It does not emit far branch even for occasions
>> subject to relocation (unless far_branches()). Of course the proper
>> implementation of the patching code is in place
>> 
>> The webrev is here http://cr.openjdk.java.net/~apetushkov/8164652/web
>> rev/ <http://cr.openjdk.java.net/~apetushkov/8164652/webrev/>
>> 
>> Regards,
>> Andrey