Spirv as target

I wrote the Circle C++ compiler. I'm considering integrating graphics shaders as a single-source language extension, similar to how CUDA integrates as single source with the host compiler.

Andrew Richards directed me here. I'm not entirely understanding what clspv is, or if it could be used to help me generate SPIRV.

Currently I generate LLVM/x64 and LLVM/NVVM by descending my translation unit's AST. Ideally there'd be a SPIRV LLVM target, so that I could create a llvm::Module in the same context as the rest of the translation unit, and they'd share the same types, and I'd just re-use the same codegen code, descend down the AST, and use IRBuilder to produce function definitions for this SPIRV Module.

I don't know if this is part of clspv, or if it's part of SPIRV-Tools, or if it's part of the LLVM trunk. What should I be looking at to get this started?

sean