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...e from svn > > 6) Edit include/llvm/Intrinsics.td > > You can either add your intrinsics directly, or just add an > include to your own file. Here I'm adding them directly. > > a) Add a definition of your intrinsic. In our case, it looks like > > def int_my_foo : Intrinsic<[llvm_ptr_ty], > [llvm_ptrptr_ty, llvm_ptr_ty]>, > GCCBuiltin<"__builtin_my_foo">; > > Clearly the fun here is the GCCBuiltin tag which is what gets > everything to /just work/. > > 7)...

As mentioned in an earlier mail, I am working on an LLVM backend for a custom processor based on MIPS. My problem is how to extend LLVM to support some esoteric/non-standard feature of the underlying hardware. I saw in the "Extending LLVM" document, that the easiest / most common way to do this was using an intrinsic function, and examples of the technique abound (all SSE for