Is there plan to add a register allocator based on Graph Coloring?

Hi, everyone.
I am a fresh man in the field of compiler.

I find the implementation of the register allocator based on graph coloring in LLVM 1.0.
However, it is removed in the current release, maybe 3.9 or 3.9.1, i am not absolutely sure.
So is there a plan to add it back in the future version?

LLVM does have a greedy register allocator

Here’s a really old blog post

http://blog.llvm.org/2011/09/greedy-register-allocation-in-llvm-30.html

Hi,

There is a graph coloring based allocator in LLVM; the PBQP allocator.

Cheers,
-Quentin