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2009 Oct 22
0
[LLVMdev] request for help writing a register allocator
On Wed, 21 Oct 2009, Lang Hames wrote:
> There are any number of things that can go wrong in register allocation, so
> it's hard for me to guess without seeing your code.
>
> Possible issues:
>
> 2) How are you making sure that interfering virtregs never receive the same
> physreg? If you're using the LiveIntervals analysis (and the
>
2009 Oct 22
4
[LLVMdev] request for help writing a register allocator
Hi Susan,
> 1. I tried running the PBQP allocator (as a dynamic pass), but that didn't
> work....
Can you tell from this what I'm doing wrong?
>
The PBQP allocator is built into the LLVM CodeGen library, so the
"-regalloc=pbqp" option is already available in llc. If you've built a copy
of the PBQP allocator in a separate library it will try to re-register