[LLVMdev] [PATCH] Re: Pluggable Register Coalescers

Evan Cheng evan.cheng at apple.com
Mon Jul 16 16:20:59 PDT 2007

On Jul 16, 2007, at 9:12 AM, David Greene wrote:

> On Friday 13 July 2007 13:32, David A. Greene wrote:
>> On Wednesday 11 July 2007 15:07, Christopher Lamb wrote:
>>> Could it be possible for there to be a harness type interface that
>>> would allow coalescers that support both modes to be hooked into the
>>> pass registration, and those that depend on the allocator not be
>>> registered as passes?
>> I have a patch for this kind of thing attached.  Please take a  
>> look and let
>> me know if it looks reasonable.
> No comments?  I'm continuing to implement a new coalescer and  
> trying to
> figure out how to factor out the code to merge live intervals from  
> the current
> implementation.  It's hard because that code is also doing legality  
> checks.


> Does the current implementation follow a published algorithm?  If  
> so, do we
> have a pointer to it?  The comments are rather sparse and it's  
> difficult to
> figure out what's going on at times.

I don't know. I suspect not. I agree the current implementation is a  
bit of a challenge to understand and modify.


>                                                    -Dave
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