[LLVMdev] Debugger for Register Allocation

[Fernando Magno Quintao Pereira]

On Fri, 17 Aug 2007, Evan Cheng wrote:

> Also, it seems to make more sense to dump the info at the end of the
> register allocation pass. Is there any particular reason for you to
> add it to the spiller instead?

I think so. The problem is that any value in smira format is a binding 
(physical-location, virtual-variable) and this information is always 
available for the spiller. After the spiller runs, you only have physical 
registers in each instruction.

Fernando

>
> On Aug 17, 2007, at 4:17 PM, Fernando Magno Quintao Pereira wrote:
>
>>
>> Hi guys,
>>
>>      I have been using a debugger for my register allocator. The
>> debugger
>> happened to be very useful at catching register assignment errors.
>> I've
>> put the debugger on-line, if anyone who is working with register
>> allocation wants to use. The debugger itself has nothing to do with
>> LLVM,
>> but I've coded a spiller that prints the code in a format that the
>> debugger can read. The page is:
>>
>> http://compilers.cs.ucla.edu/fernando/projects/debugger/
>
>
>>
>> all the best,
>>
>> Fernando
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