llvm dev - Dec 2009 - [LLVMdev] [PATCH] increase the max number of physical registers

Here's the actual patch, sorry ;)

On 12/07/2009 09:02 PM, Pekka Jääskeläinen wrote:
> Hello,
> 
> Can someone please commit this patch?
> 
> Thanks.
> 
> On 11/21/2009 11:15 PM, Pekka Jääskeläinen wrote:
>> Hello,
>>
>> Attached is a trivial patch to increase the max number of physical
>> registers in LLVM from 1024 to 16384.
>>
>> In our TCE toolset we allow the designer to choose the number of 
>> registers in the designed TTA processors freely, and recently
>> while experimenting with using TTA for a GPU design we have
>> bumped into this limit several times.
>>
>> What has made matters a bit worse for us is that we need to
>> reserve two reg indices for each register so they can be used
>> both for integer and floating point computation, thus the
>> current limit is 512 registers and the patch lifts it to 8K
>> which should be enough for a while.
>>
>> The patch applies cleanly to LLVM 2.5, 2.6 and trunk.
>> 'make check' passes in trunk with this patch.
>>
>> Best regards,
>>
> 
> 

-- 
Pekka
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On Dec 7, 2009, at 11:15 AM, Pekka Jääskeläinen wrote:
> Here's the actual patch, sorry ;)
Applied in r90789.

Dan

This caused a massive slow down to post-ra scheduler (llc -O3 on x86, -O2 on
ARM). I'm going to revert it for now until it has been addressed.

Evan

On Dec 7, 2009, at 11:39 AM, Dan Gohman wrote:
> 
> On Dec 7, 2009, at 11:15 AM, Pekka Jääskeläinen wrote:
> 
>> Here's the actual patch, sorry ;)
> 
> Applied in r90789.
> 
> Dan
> 
> 
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