Move LLVM IR out of SSA form

Question

I am attempting to write a pass which would eliminate phi nodes in llvm IR. Although I have converted the llvm IR to CSSA form I am not sure how to actually remove the phi nodes. From a broader perspective, I want to do RA directly from LLVM IR. The only option I can think of is to have the SSA deconstruction pass as an analysis pass and then while doing code generation, use the information from this pass to insert the necessary movs. Is that the only option or is there any other way whereby we can move out of SSA form with IR.