[LLVMdev] Goog test-cases for a new register allocator

Fernando Magno Quintao Pereira fernando at CS.UCLA.EDU
Wed Apr 2 09:55:14 PDT 2008

Hey, Roman,

     I have some tests that I used to debug my allocator. I will send them 
to you in a separate e-mail.



> Hi,
> As I mentioned some time ago on the mailing list, I'm working on the
> implementation of the Sarkar's Extended Linear Scan algorithm for LLVM.
> For testing and debugging of this algorithm, I need some good
> test-cases that check different functionalities of the register
> allocator, e.g.:
> - test-cases involving a lot of spilling
> - test-cases using pre-colored registers, e.g. like the EAX register
> used by the division instruction on X86
> - test-cases making use of different (partially aliasing)
> register-classes at the same-time
> - test-cases where the caller-save vs callee-save choices of registers
> play a big role.
> I think these requirements are not specific for my allocator only, but
> are important for checking any register allocator. May be someone
> (Fernando? David? Evan?) who was working on register allocators has
> found a good set of examples covering some of the topics? Or may be
> someone knows good examples due to the fact that current register
> allocators perform too bad on it? ;-)
> Any help and ideas are appreciated!
> Thanks,
> - Roman
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