It's clear that Apple has an [OpenCL](http://developer.apple.com/mac/library/documentation/Performance/Conceptual/OpenCL_MacProgGuide/OpenCLontheMacPlatform/OpenCLontheMacPlatform.html) implementation based on Clang and LLVM. There's also a talk by an Apple Engineer about what it took to get OpenCL going on LLVM [here](http://llvm.org/devmtg/2009-10/)

However, is the code for this implementation available under some sort of open-source license or is this closed source software? If the code hasn't been released, anyone know if perchance it might be in the future? Would like to know if there is an open-source OpenCL implementation based on Clang and LLVM before we go off and try to implement our own...