Blender Git Loki

Generate function calls for every node, using code defined in precompiled modules.

Note that this is currently not quite working: The clang compiler call used
tentatively for generating the LLVM IR code for modules uses a lowering pass to
coerce struct data types (such as float3) according to the target ABI. This should
be avoided and is unnecessary for our purposes, since we stitch together and optimize
these code fragments ourselves. In principle we could avoid using a C compiler altogether
and write this stuff by hand, but the point of using the compiler is to avoid this tedious
work. More info:
http://stackoverflow.com/questions/22776391/why-does-clang-coerce-struct-parameters-to-ints