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I'd like to add a custom #pragma directive in clang for research purposes. I'm familiar with the LLVM pass-writing interface but new to the rest of LLVM and clang. I've looked into Simone Pellegrini's work on a #pragma interface (https://github.com/motonacciu/clomp and http://llvm.org/devmtg/2013-04/pellegrini-slides.pdf), but I'm in no position to determine if this approach