search for: built_in_md

...; 2) Edit the file gcc/builtins.def > > The comments at the top are helpful, read them. > > a) Add a macro that looks something like > > #undef DEF_MY_BUILTIN > #define DEF_MY_BUILTIN(ENUM, NAME, TYPE, ATTRS) \ > DEF_BUILTIN (ENUM, "__builtin_" NAME, BUILT_IN_MD, TYPE, TYPE, \ > false, false, true, ATTRS, false, true) > > You can figure out what this means based on the comments in the > builtins.def file. Essentially the important magic is the > BUILT_IN_MD flag trickles through and gets your llvm i...

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