llvm::FunctionType* FunctionTypePtr = llvm::FunctionType::get( returnTypePtr , types , false );
llvm::Function* llvmFunction = llvm::Function::Create(FunctionTypePtr,
                        llvm::GlobalValue::ExternalLinkage,
                        functionName,
                        llvmModule);

llvm::BasicBlock* entryBlock = llvm::BasicBlock::Create(llvmContext, "", llvmFunction);
llvm::IRBuilder<> builder(entryBlock);

//where do i get address??
llvm::LoadInst* load = builder.CreateLoad(address, "read");