[LLVMdev] Supporting pre-allocated registers in LLVM

[Bill Wendling]

On Oct 4, 2007, at 10:40 PM, nkavv at physics.auth.gr wrote:

> 2. Which are the new register allocation algorithms currently under  
> design? Do
> they support preallocation of registers (it is different to  
> "fixing" a register
> in GCC parlance)?
>
Hi Nikolaos,

I have an alpha version of Chow & Hennesey's priority-based graph  
coloring algorithm. It's suffering from some bit-rotting -- e.g.,  
there's some trouble with how it calculates "forbidden" registers.  
You're welcome to the code, if you'd like to hack on it. I've been  
trying to refresh it in the past few days, but would love some help. :-)

-bw