depau

    if(GlobalVariable* GA = M.getGlobalVariable("llvm.global.annotations")) {
      // the first operand holds the metadata
      for (Value *AOp : GA->operands()) {
        // all metadata are stored in an array of struct of metadata
        if (ConstantArray *CA = dyn_cast<ConstantArray>(AOp)) {
          // so iterate over the operands
          for (Value *CAOp : CA->operands()) {
            // get the struct, which holds a pointer to the annotated function
            // as first field, and the annotation as second field
            if (ConstantStruct *CS = dyn_cast<ConstantStruct>(CAOp)) {