[LLVMdev] Register allocation on IR

[Andrew Clinton]

I'm wondering if there are any tools available to help with register 
allocation directly on the LLVM IR.  I'm looking for something like 
"reg2mem" but that will also allocate registers to all SSA values, and 
that will attempt to both coalesce non-conflicting memory and minimize 
the amount of copying due to PHI nodes.

Currently I've started working with LiveValues and a reverse post-order 
traversal to linearly allocate registers, but I'm wondering if there are 
more suitable tools that would be immediately useful for this problem.

Andrew