title: It there an equivalent to size_t in llvm
body: <p>Some system libraries like malloc strlen want or return size_t as parameter.</p>
  
  <ul>
  <li>What is the right choice in LLVM IR to interact with these functions? </li>
  <li>Is the selection the task for the compiler? </li>
  <li>Does LLVM IR have a size_t type?</li>
  </ul>