I initiated a first bounty to port LLVM to AROS.
Since it is a known fact that reaching AROS ABI V1 will break compatibility with all apps i hope the break will be done right and a switch to 64Bit will be part of it.
I'm currently working on the ABI V1 for i386. Unless somebody wants to work in parallel on AMD64 ABI V1 this will come some time after i386 ABI V1.
greets,
Staf.