IRIX support?

I know it's a bit retro, but does anyone know the state of clang
support on IRIX? I know clang supports a MIPS target, but MIPS !=
IRIX necessarily, so I thought I would ask.

I found this for LLVM 3.0:

But otherwise I don't find much when googling "clang for irix" and
"clang for sgi".

LLVM and clang (modulo bugs) support the ABIs that IRIX uses for MIPS, however I don't know the status of toolchain support for IRIX in clang (finding locations of headers, linker, assembler, and so on). If this is missing, it would be very easy to add, but it would require someone who actually cared about IRIX to do it.